/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/seq-mthreaded/pals_lcr.3_overflow.ufo.UNBOUNDED.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 07:32:13,907 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 07:32:13,910 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 07:32:13,953 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-22 07:32:13,984 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 07:32:13,985 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 07:32:13,986 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 07:32:13,988 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 07:32:13,989 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 07:32:13,990 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 07:32:13,992 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 07:32:13,994 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 07:32:13,996 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 07:32:13,997 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 07:32:13,999 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 07:32:14,000 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 07:32:14,003 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 07:32:14,013 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 07:32:14,014 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 07:32:14,015 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 07:32:14,016 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 07:32:14,043 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 07:32:14,043 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 07:32:14,045 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 07:32:14,045 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 07:32:14,046 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 07:32:14,046 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 07:32:14,046 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 07:32:14,046 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 07:32:14,047 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 07:32:14,047 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 07:32:14,047 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 07:32:14,048 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 07:32:14,048 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 07:32:14,048 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 07:32:14,048 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 07:32:14,049 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 07:32:14,049 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 07:32:14,049 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 07:32:14,050 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 07:32:14,050 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 07:32:14,050 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 07:32:14,051 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 07:32:14,051 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 07:32:14,051 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 07:32:14,052 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 07:32:14,052 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 07:32:14,423 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 07:32:14,456 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 07:32:14,460 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 07:32:14,462 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 07:32:14,463 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 07:32:14,464 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_lcr.3_overflow.ufo.UNBOUNDED.pals.c [2020-12-22 07:32:14,557 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c6c581bf/873e79a52c424c4ea7a2b7f4009f5724/FLAG6ea6f9390 [2020-12-22 07:32:15,202 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 07:32:15,202 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr.3_overflow.ufo.UNBOUNDED.pals.c [2020-12-22 07:32:15,213 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c6c581bf/873e79a52c424c4ea7a2b7f4009f5724/FLAG6ea6f9390 [2020-12-22 07:32:15,561 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c6c581bf/873e79a52c424c4ea7a2b7f4009f5724 [2020-12-22 07:32:15,564 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 07:32:15,567 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 07:32:15,573 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 07:32:15,576 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 07:32:15,581 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 07:32:15,582 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:32:15" (1/1) ... [2020-12-22 07:32:15,584 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e551be8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:32:15, skipping insertion in model container [2020-12-22 07:32:15,584 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:32:15" (1/1) ... [2020-12-22 07:32:15,595 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 07:32:15,652 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 07:32:15,892 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/seq-mthreaded/pals_lcr.3_overflow.ufo.UNBOUNDED.pals.c[6117,6130] [2020-12-22 07:32:15,896 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:32:15,907 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 07:32:15,950 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/seq-mthreaded/pals_lcr.3_overflow.ufo.UNBOUNDED.pals.c[6117,6130] [2020-12-22 07:32:15,951 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:32:15,979 INFO L208 MainTranslator]: Completed translation [2020-12-22 07:32:15,979 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:32:15 WrapperNode [2020-12-22 07:32:15,980 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 07:32:15,981 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 07:32:15,981 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 07:32:15,981 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 07:32:15,991 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:32:15" (1/1) ... [2020-12-22 07:32:16,002 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:32:15" (1/1) ... [2020-12-22 07:32:16,033 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 07:32:16,034 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 07:32:16,035 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 07:32:16,035 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 07:32:16,046 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:32:15" (1/1) ... [2020-12-22 07:32:16,046 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:32:15" (1/1) ... [2020-12-22 07:32:16,050 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:32:15" (1/1) ... [2020-12-22 07:32:16,050 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:32:15" (1/1) ... [2020-12-22 07:32:16,057 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:32:15" (1/1) ... [2020-12-22 07:32:16,063 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:32:15" (1/1) ... [2020-12-22 07:32:16,066 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:32:15" (1/1) ... [2020-12-22 07:32:16,070 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 07:32:16,072 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 07:32:16,072 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 07:32:16,072 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 07:32:16,073 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:32:15" (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 [2020-12-22 07:32:16,190 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 07:32:16,191 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 07:32:16,191 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 07:32:16,191 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 07:32:16,839 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 07:32:16,839 INFO L299 CfgBuilder]: Removed 19 assume(true) statements. [2020-12-22 07:32:16,842 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:32:16 BoogieIcfgContainer [2020-12-22 07:32:16,843 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 07:32:16,845 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 07:32:16,845 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 07:32:16,849 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 07:32:16,849 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 07:32:15" (1/3) ... [2020-12-22 07:32:16,850 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29ed3144 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:32:16, skipping insertion in model container [2020-12-22 07:32:16,850 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:32:15" (2/3) ... [2020-12-22 07:32:16,851 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29ed3144 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:32:16, skipping insertion in model container [2020-12-22 07:32:16,851 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:32:16" (3/3) ... [2020-12-22 07:32:16,853 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.3_overflow.ufo.UNBOUNDED.pals.c [2020-12-22 07:32:16,863 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 07:32:16,870 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 07:32:16,892 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 07:32:16,921 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 07:32:16,922 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 07:32:16,922 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 07:32:16,922 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 07:32:16,922 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 07:32:16,922 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 07:32:16,923 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 07:32:16,923 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 07:32:16,943 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states. [2020-12-22 07:32:16,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-22 07:32:16,951 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:32:16,952 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] [2020-12-22 07:32:16,952 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:32:16,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:32:16,959 INFO L82 PathProgramCache]: Analyzing trace with hash 1133243219, now seen corresponding path program 1 times [2020-12-22 07:32:16,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:32:16,971 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488055167] [2020-12-22 07:32:16,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:32:17,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:32:17,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:32:17,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488055167] [2020-12-22 07:32:17,264 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:32:17,265 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:32:17,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360840164] [2020-12-22 07:32:17,271 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 07:32:17,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:32:17,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 07:32:17,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 07:32:17,299 INFO L87 Difference]: Start difference. First operand 61 states. Second operand 2 states. [2020-12-22 07:32:17,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:32:17,346 INFO L93 Difference]: Finished difference Result 97 states and 159 transitions. [2020-12-22 07:32:17,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 07:32:17,348 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 25 [2020-12-22 07:32:17,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:32:17,373 INFO L225 Difference]: With dead ends: 97 [2020-12-22 07:32:17,373 INFO L226 Difference]: Without dead ends: 57 [2020-12-22 07:32:17,376 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 07:32:17,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-12-22 07:32:17,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-12-22 07:32:17,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-12-22 07:32:17,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 93 transitions. [2020-12-22 07:32:17,431 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 93 transitions. Word has length 25 [2020-12-22 07:32:17,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:32:17,432 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 93 transitions. [2020-12-22 07:32:17,432 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 07:32:17,432 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 93 transitions. [2020-12-22 07:32:17,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-22 07:32:17,435 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:32:17,435 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] [2020-12-22 07:32:17,437 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 07:32:17,437 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:32:17,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:32:17,439 INFO L82 PathProgramCache]: Analyzing trace with hash 315594769, now seen corresponding path program 1 times [2020-12-22 07:32:17,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:32:17,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155785357] [2020-12-22 07:32:17,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:32:17,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:32:17,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:32:17,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155785357] [2020-12-22 07:32:17,638 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:32:17,638 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:32:17,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431505775] [2020-12-22 07:32:17,640 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:32:17,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:32:17,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:32:17,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:32:17,642 INFO L87 Difference]: Start difference. First operand 57 states and 93 transitions. Second operand 5 states. [2020-12-22 07:32:17,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:32:17,726 INFO L93 Difference]: Finished difference Result 96 states and 152 transitions. [2020-12-22 07:32:17,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 07:32:17,727 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2020-12-22 07:32:17,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:32:17,728 INFO L225 Difference]: With dead ends: 96 [2020-12-22 07:32:17,729 INFO L226 Difference]: Without dead ends: 57 [2020-12-22 07:32:17,730 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:32:17,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-12-22 07:32:17,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-12-22 07:32:17,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-12-22 07:32:17,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 77 transitions. [2020-12-22 07:32:17,749 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 77 transitions. Word has length 25 [2020-12-22 07:32:17,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:32:17,749 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 77 transitions. [2020-12-22 07:32:17,749 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:32:17,750 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 77 transitions. [2020-12-22 07:32:17,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-22 07:32:17,751 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:32:17,752 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, 1, 1, 1] [2020-12-22 07:32:17,755 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 07:32:17,755 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:32:17,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:32:17,757 INFO L82 PathProgramCache]: Analyzing trace with hash -278543826, now seen corresponding path program 1 times [2020-12-22 07:32:17,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:32:17,758 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731825573] [2020-12-22 07:32:17,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:32:17,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:32:17,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:32:17,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731825573] [2020-12-22 07:32:17,932 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:32:17,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:32:17,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847893151] [2020-12-22 07:32:17,935 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:32:17,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:32:17,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:32:17,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:32:17,939 INFO L87 Difference]: Start difference. First operand 57 states and 77 transitions. Second operand 3 states. [2020-12-22 07:32:18,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:32:18,001 INFO L93 Difference]: Finished difference Result 121 states and 177 transitions. [2020-12-22 07:32:18,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:32:18,002 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 40 [2020-12-22 07:32:18,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:32:18,004 INFO L225 Difference]: With dead ends: 121 [2020-12-22 07:32:18,004 INFO L226 Difference]: Without dead ends: 86 [2020-12-22 07:32:18,005 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:32:18,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-12-22 07:32:18,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 84. [2020-12-22 07:32:18,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-12-22 07:32:18,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 120 transitions. [2020-12-22 07:32:18,018 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 120 transitions. Word has length 40 [2020-12-22 07:32:18,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:32:18,018 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 120 transitions. [2020-12-22 07:32:18,018 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:32:18,019 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 120 transitions. [2020-12-22 07:32:18,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-22 07:32:18,020 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:32:18,020 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, 1, 1, 1] [2020-12-22 07:32:18,021 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 07:32:18,021 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:32:18,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:32:18,026 INFO L82 PathProgramCache]: Analyzing trace with hash 1401070434, now seen corresponding path program 1 times [2020-12-22 07:32:18,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:32:18,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697674725] [2020-12-22 07:32:18,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:32:18,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:32:18,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:32:18,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697674725] [2020-12-22 07:32:18,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:32:18,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:32:18,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332520033] [2020-12-22 07:32:18,167 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:32:18,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:32:18,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:32:18,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:32:18,170 INFO L87 Difference]: Start difference. First operand 84 states and 120 transitions. Second operand 3 states. [2020-12-22 07:32:18,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:32:18,231 INFO L93 Difference]: Finished difference Result 196 states and 296 transitions. [2020-12-22 07:32:18,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:32:18,233 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 40 [2020-12-22 07:32:18,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:32:18,236 INFO L225 Difference]: With dead ends: 196 [2020-12-22 07:32:18,238 INFO L226 Difference]: Without dead ends: 134 [2020-12-22 07:32:18,239 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:32:18,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-12-22 07:32:18,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 132. [2020-12-22 07:32:18,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-12-22 07:32:18,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 195 transitions. [2020-12-22 07:32:18,279 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 195 transitions. Word has length 40 [2020-12-22 07:32:18,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:32:18,283 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 195 transitions. [2020-12-22 07:32:18,283 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:32:18,284 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 195 transitions. [2020-12-22 07:32:18,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-22 07:32:18,285 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:32:18,285 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, 1, 1, 1] [2020-12-22 07:32:18,285 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 07:32:18,286 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:32:18,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:32:18,287 INFO L82 PathProgramCache]: Analyzing trace with hash 1738863576, now seen corresponding path program 1 times [2020-12-22 07:32:18,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:32:18,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247031147] [2020-12-22 07:32:18,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:32:18,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:32:18,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:32:18,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247031147] [2020-12-22 07:32:18,402 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:32:18,402 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:32:18,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755866225] [2020-12-22 07:32:18,403 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:32:18,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:32:18,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:32:18,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:32:18,406 INFO L87 Difference]: Start difference. First operand 132 states and 195 transitions. Second operand 3 states. [2020-12-22 07:32:18,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:32:18,495 INFO L93 Difference]: Finished difference Result 328 states and 501 transitions. [2020-12-22 07:32:18,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:32:18,497 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 40 [2020-12-22 07:32:18,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:32:18,502 INFO L225 Difference]: With dead ends: 328 [2020-12-22 07:32:18,506 INFO L226 Difference]: Without dead ends: 218 [2020-12-22 07:32:18,507 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:32:18,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-12-22 07:32:18,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 216. [2020-12-22 07:32:18,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2020-12-22 07:32:18,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 323 transitions. [2020-12-22 07:32:18,557 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 323 transitions. Word has length 40 [2020-12-22 07:32:18,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:32:18,558 INFO L481 AbstractCegarLoop]: Abstraction has 216 states and 323 transitions. [2020-12-22 07:32:18,558 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:32:18,563 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 323 transitions. [2020-12-22 07:32:18,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-22 07:32:18,564 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:32:18,565 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, 1, 1, 1] [2020-12-22 07:32:18,565 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 07:32:18,565 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:32:18,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:32:18,566 INFO L82 PathProgramCache]: Analyzing trace with hash -1338118322, now seen corresponding path program 1 times [2020-12-22 07:32:18,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:32:18,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308751015] [2020-12-22 07:32:18,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:32:18,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:32:18,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:32:18,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308751015] [2020-12-22 07:32:18,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:32:18,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:32:18,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6598024] [2020-12-22 07:32:18,656 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 07:32:18,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:32:18,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 07:32:18,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 07:32:18,658 INFO L87 Difference]: Start difference. First operand 216 states and 323 transitions. Second operand 6 states. [2020-12-22 07:32:18,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:32:18,788 INFO L93 Difference]: Finished difference Result 410 states and 624 transitions. [2020-12-22 07:32:18,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:32:18,789 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 40 [2020-12-22 07:32:18,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:32:18,791 INFO L225 Difference]: With dead ends: 410 [2020-12-22 07:32:18,792 INFO L226 Difference]: Without dead ends: 216 [2020-12-22 07:32:18,793 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 07:32:18,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-12-22 07:32:18,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 216. [2020-12-22 07:32:18,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2020-12-22 07:32:18,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 319 transitions. [2020-12-22 07:32:18,816 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 319 transitions. Word has length 40 [2020-12-22 07:32:18,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:32:18,816 INFO L481 AbstractCegarLoop]: Abstraction has 216 states and 319 transitions. [2020-12-22 07:32:18,817 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 07:32:18,817 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 319 transitions. [2020-12-22 07:32:18,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-22 07:32:18,818 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:32:18,819 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, 1, 1, 1] [2020-12-22 07:32:18,819 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 07:32:18,819 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:32:18,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:32:18,820 INFO L82 PathProgramCache]: Analyzing trace with hash -317049968, now seen corresponding path program 1 times [2020-12-22 07:32:18,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:32:18,820 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096452240] [2020-12-22 07:32:18,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:32:18,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:32:18,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:32:18,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096452240] [2020-12-22 07:32:18,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:32:18,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:32:18,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296588377] [2020-12-22 07:32:18,896 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:32:18,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:32:18,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:32:18,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:32:18,897 INFO L87 Difference]: Start difference. First operand 216 states and 319 transitions. Second operand 5 states. [2020-12-22 07:32:19,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:32:19,044 INFO L93 Difference]: Finished difference Result 1186 states and 1804 transitions. [2020-12-22 07:32:19,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:32:19,045 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 40 [2020-12-22 07:32:19,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:32:19,051 INFO L225 Difference]: With dead ends: 1186 [2020-12-22 07:32:19,051 INFO L226 Difference]: Without dead ends: 992 [2020-12-22 07:32:19,052 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:32:19,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 992 states. [2020-12-22 07:32:19,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 992 to 408. [2020-12-22 07:32:19,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 408 states. [2020-12-22 07:32:19,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 599 transitions. [2020-12-22 07:32:19,094 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 599 transitions. Word has length 40 [2020-12-22 07:32:19,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:32:19,095 INFO L481 AbstractCegarLoop]: Abstraction has 408 states and 599 transitions. [2020-12-22 07:32:19,095 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:32:19,095 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 599 transitions. [2020-12-22 07:32:19,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-22 07:32:19,096 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:32:19,096 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, 1, 1, 1, 1, 1] [2020-12-22 07:32:19,097 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 07:32:19,097 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:32:19,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:32:19,097 INFO L82 PathProgramCache]: Analyzing trace with hash -1091548472, now seen corresponding path program 1 times [2020-12-22 07:32:19,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:32:19,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239755953] [2020-12-22 07:32:19,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:32:19,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:32:19,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:32:19,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239755953] [2020-12-22 07:32:19,238 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:32:19,238 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:32:19,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29737959] [2020-12-22 07:32:19,239 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:32:19,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:32:19,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:32:19,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:32:19,240 INFO L87 Difference]: Start difference. First operand 408 states and 599 transitions. Second operand 5 states. [2020-12-22 07:32:19,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:32:19,333 INFO L93 Difference]: Finished difference Result 990 states and 1474 transitions. [2020-12-22 07:32:19,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 07:32:19,334 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 42 [2020-12-22 07:32:19,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:32:19,338 INFO L225 Difference]: With dead ends: 990 [2020-12-22 07:32:19,338 INFO L226 Difference]: Without dead ends: 604 [2020-12-22 07:32:19,340 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:32:19,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2020-12-22 07:32:19,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 408. [2020-12-22 07:32:19,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 408 states. [2020-12-22 07:32:19,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 591 transitions. [2020-12-22 07:32:19,378 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 591 transitions. Word has length 42 [2020-12-22 07:32:19,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:32:19,379 INFO L481 AbstractCegarLoop]: Abstraction has 408 states and 591 transitions. [2020-12-22 07:32:19,379 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:32:19,379 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 591 transitions. [2020-12-22 07:32:19,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-22 07:32:19,380 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:32:19,380 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, 1, 1, 1, 1, 1] [2020-12-22 07:32:19,380 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 07:32:19,380 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:32:19,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:32:19,381 INFO L82 PathProgramCache]: Analyzing trace with hash -1158041984, now seen corresponding path program 1 times [2020-12-22 07:32:19,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:32:19,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779483938] [2020-12-22 07:32:19,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:32:19,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:32:19,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:32:19,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779483938] [2020-12-22 07:32:19,429 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:32:19,429 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:32:19,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964050387] [2020-12-22 07:32:19,430 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:32:19,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:32:19,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:32:19,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:32:19,431 INFO L87 Difference]: Start difference. First operand 408 states and 591 transitions. Second operand 3 states. [2020-12-22 07:32:19,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:32:19,493 INFO L93 Difference]: Finished difference Result 970 states and 1411 transitions. [2020-12-22 07:32:19,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:32:19,494 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 42 [2020-12-22 07:32:19,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:32:19,497 INFO L225 Difference]: With dead ends: 970 [2020-12-22 07:32:19,498 INFO L226 Difference]: Without dead ends: 584 [2020-12-22 07:32:19,499 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:32:19,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2020-12-22 07:32:19,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 582. [2020-12-22 07:32:19,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 582 states. [2020-12-22 07:32:19,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 829 transitions. [2020-12-22 07:32:19,549 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 829 transitions. Word has length 42 [2020-12-22 07:32:19,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:32:19,549 INFO L481 AbstractCegarLoop]: Abstraction has 582 states and 829 transitions. [2020-12-22 07:32:19,549 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:32:19,549 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 829 transitions. [2020-12-22 07:32:19,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-22 07:32:19,550 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:32:19,550 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, 1, 1, 1, 1, 1, 1] [2020-12-22 07:32:19,550 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 07:32:19,551 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:32:19,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:32:19,551 INFO L82 PathProgramCache]: Analyzing trace with hash 107012533, now seen corresponding path program 1 times [2020-12-22 07:32:19,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:32:19,552 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629123366] [2020-12-22 07:32:19,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:32:19,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:32:19,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:32:19,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629123366] [2020-12-22 07:32:19,636 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:32:19,636 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 07:32:19,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090048186] [2020-12-22 07:32:19,637 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 07:32:19,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:32:19,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 07:32:19,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 07:32:19,638 INFO L87 Difference]: Start difference. First operand 582 states and 829 transitions. Second operand 8 states. [2020-12-22 07:32:19,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:32:19,879 INFO L93 Difference]: Finished difference Result 1089 states and 1532 transitions. [2020-12-22 07:32:19,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 07:32:19,880 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 43 [2020-12-22 07:32:19,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:32:19,886 INFO L225 Difference]: With dead ends: 1089 [2020-12-22 07:32:19,886 INFO L226 Difference]: Without dead ends: 1087 [2020-12-22 07:32:19,887 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-12-22 07:32:19,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1087 states. [2020-12-22 07:32:19,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1087 to 630. [2020-12-22 07:32:19,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 630 states. [2020-12-22 07:32:19,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 630 states to 630 states and 873 transitions. [2020-12-22 07:32:19,961 INFO L78 Accepts]: Start accepts. Automaton has 630 states and 873 transitions. Word has length 43 [2020-12-22 07:32:19,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:32:19,961 INFO L481 AbstractCegarLoop]: Abstraction has 630 states and 873 transitions. [2020-12-22 07:32:19,961 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 07:32:19,961 INFO L276 IsEmpty]: Start isEmpty. Operand 630 states and 873 transitions. [2020-12-22 07:32:19,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-22 07:32:19,963 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:32:19,963 INFO L422 BasicCegarLoop]: trace histogram [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, 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] [2020-12-22 07:32:19,963 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 07:32:19,964 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:32:19,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:32:19,964 INFO L82 PathProgramCache]: Analyzing trace with hash 1768278086, now seen corresponding path program 1 times [2020-12-22 07:32:19,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:32:19,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406121437] [2020-12-22 07:32:19,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:32:19,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:32:20,040 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 07:32:20,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406121437] [2020-12-22 07:32:20,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:32:20,041 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:32:20,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30456050] [2020-12-22 07:32:20,042 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:32:20,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:32:20,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:32:20,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:32:20,045 INFO L87 Difference]: Start difference. First operand 630 states and 873 transitions. Second operand 5 states. [2020-12-22 07:32:20,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:32:20,337 INFO L93 Difference]: Finished difference Result 2582 states and 3597 transitions. [2020-12-22 07:32:20,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 07:32:20,338 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 62 [2020-12-22 07:32:20,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:32:20,348 INFO L225 Difference]: With dead ends: 2582 [2020-12-22 07:32:20,349 INFO L226 Difference]: Without dead ends: 1976 [2020-12-22 07:32:20,351 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:32:20,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1976 states. [2020-12-22 07:32:20,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1976 to 1234. [2020-12-22 07:32:20,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1234 states. [2020-12-22 07:32:20,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1234 states to 1234 states and 1709 transitions. [2020-12-22 07:32:20,499 INFO L78 Accepts]: Start accepts. Automaton has 1234 states and 1709 transitions. Word has length 62 [2020-12-22 07:32:20,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:32:20,499 INFO L481 AbstractCegarLoop]: Abstraction has 1234 states and 1709 transitions. [2020-12-22 07:32:20,499 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:32:20,499 INFO L276 IsEmpty]: Start isEmpty. Operand 1234 states and 1709 transitions. [2020-12-22 07:32:20,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-22 07:32:20,501 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:32:20,501 INFO L422 BasicCegarLoop]: trace histogram [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, 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] [2020-12-22 07:32:20,501 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 07:32:20,502 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:32:20,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:32:20,502 INFO L82 PathProgramCache]: Analyzing trace with hash -504730, now seen corresponding path program 1 times [2020-12-22 07:32:20,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:32:20,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102832265] [2020-12-22 07:32:20,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:32:20,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:32:20,580 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 07:32:20,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102832265] [2020-12-22 07:32:20,581 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:32:20,581 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:32:20,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335148704] [2020-12-22 07:32:20,581 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:32:20,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:32:20,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:32:20,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:32:20,582 INFO L87 Difference]: Start difference. First operand 1234 states and 1709 transitions. Second operand 5 states. [2020-12-22 07:32:20,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:32:20,905 INFO L93 Difference]: Finished difference Result 3186 states and 4433 transitions. [2020-12-22 07:32:20,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 07:32:20,905 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 62 [2020-12-22 07:32:20,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:32:20,919 INFO L225 Difference]: With dead ends: 3186 [2020-12-22 07:32:20,919 INFO L226 Difference]: Without dead ends: 2580 [2020-12-22 07:32:20,921 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:32:20,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2580 states. [2020-12-22 07:32:21,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2580 to 2142. [2020-12-22 07:32:21,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2142 states. [2020-12-22 07:32:21,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2142 states to 2142 states and 2953 transitions. [2020-12-22 07:32:21,153 INFO L78 Accepts]: Start accepts. Automaton has 2142 states and 2953 transitions. Word has length 62 [2020-12-22 07:32:21,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:32:21,153 INFO L481 AbstractCegarLoop]: Abstraction has 2142 states and 2953 transitions. [2020-12-22 07:32:21,153 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:32:21,153 INFO L276 IsEmpty]: Start isEmpty. Operand 2142 states and 2953 transitions. [2020-12-22 07:32:21,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-22 07:32:21,155 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:32:21,155 INFO L422 BasicCegarLoop]: trace histogram [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, 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] [2020-12-22 07:32:21,155 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 07:32:21,155 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:32:21,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:32:21,156 INFO L82 PathProgramCache]: Analyzing trace with hash 1131135110, now seen corresponding path program 1 times [2020-12-22 07:32:21,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:32:21,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160052101] [2020-12-22 07:32:21,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:32:21,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:32:21,260 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 07:32:21,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160052101] [2020-12-22 07:32:21,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:32:21,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:32:21,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110425959] [2020-12-22 07:32:21,262 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:32:21,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:32:21,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:32:21,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:32:21,263 INFO L87 Difference]: Start difference. First operand 2142 states and 2953 transitions. Second operand 5 states. [2020-12-22 07:32:21,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:32:21,611 INFO L93 Difference]: Finished difference Result 3618 states and 5037 transitions. [2020-12-22 07:32:21,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 07:32:21,612 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 62 [2020-12-22 07:32:21,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:32:21,628 INFO L225 Difference]: With dead ends: 3618 [2020-12-22 07:32:21,629 INFO L226 Difference]: Without dead ends: 3184 [2020-12-22 07:32:21,631 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:32:21,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3184 states. [2020-12-22 07:32:21,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3184 to 2574. [2020-12-22 07:32:21,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2574 states. [2020-12-22 07:32:21,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2574 states to 2574 states and 3561 transitions. [2020-12-22 07:32:21,994 INFO L78 Accepts]: Start accepts. Automaton has 2574 states and 3561 transitions. Word has length 62 [2020-12-22 07:32:21,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:32:21,995 INFO L481 AbstractCegarLoop]: Abstraction has 2574 states and 3561 transitions. [2020-12-22 07:32:21,995 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:32:21,996 INFO L276 IsEmpty]: Start isEmpty. Operand 2574 states and 3561 transitions. [2020-12-22 07:32:21,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 07:32:21,999 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:32:21,999 INFO L422 BasicCegarLoop]: trace histogram [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, 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] [2020-12-22 07:32:22,000 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 07:32:22,000 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:32:22,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:32:22,001 INFO L82 PathProgramCache]: Analyzing trace with hash 524485384, now seen corresponding path program 1 times [2020-12-22 07:32:22,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:32:22,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786747674] [2020-12-22 07:32:22,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:32:22,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:32:22,265 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:32:22,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786747674] [2020-12-22 07:32:22,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989826107] [2020-12-22 07:32:22,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:32:22,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:32:22,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 07:32:22,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:32:22,721 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 07:32:22,721 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:32:22,721 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4] total 12 [2020-12-22 07:32:22,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147651435] [2020-12-22 07:32:22,723 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 07:32:22,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:32:22,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 07:32:22,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-12-22 07:32:22,724 INFO L87 Difference]: Start difference. First operand 2574 states and 3561 transitions. Second operand 12 states. [2020-12-22 07:32:26,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:32:26,229 INFO L93 Difference]: Finished difference Result 12705 states and 17538 transitions. [2020-12-22 07:32:26,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-12-22 07:32:26,229 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 63 [2020-12-22 07:32:26,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:32:26,278 INFO L225 Difference]: With dead ends: 12705 [2020-12-22 07:32:26,278 INFO L226 Difference]: Without dead ends: 10155 [2020-12-22 07:32:26,288 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 996 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=690, Invalid=2502, Unknown=0, NotChecked=0, Total=3192 [2020-12-22 07:32:26,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10155 states. [2020-12-22 07:32:27,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10155 to 7490. [2020-12-22 07:32:27,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7490 states. [2020-12-22 07:32:27,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7490 states to 7490 states and 10157 transitions. [2020-12-22 07:32:27,245 INFO L78 Accepts]: Start accepts. Automaton has 7490 states and 10157 transitions. Word has length 63 [2020-12-22 07:32:27,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:32:27,245 INFO L481 AbstractCegarLoop]: Abstraction has 7490 states and 10157 transitions. [2020-12-22 07:32:27,245 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 07:32:27,245 INFO L276 IsEmpty]: Start isEmpty. Operand 7490 states and 10157 transitions. [2020-12-22 07:32:27,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 07:32:27,247 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:32:27,247 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, 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] [2020-12-22 07:32:27,460 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-22 07:32:27,461 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:32:27,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:32:27,462 INFO L82 PathProgramCache]: Analyzing trace with hash -1834252770, now seen corresponding path program 1 times [2020-12-22 07:32:27,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:32:27,463 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785176751] [2020-12-22 07:32:27,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:32:27,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:32:27,646 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:32:27,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785176751] [2020-12-22 07:32:27,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205208961] [2020-12-22 07:32:27,648 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 [2020-12-22 07:32:27,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:32:27,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-22 07:32:27,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:32:27,893 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 07:32:28,153 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:32:28,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:32:28,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 07:32:28,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281585738] [2020-12-22 07:32:28,154 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 07:32:28,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:32:28,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 07:32:28,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2020-12-22 07:32:28,156 INFO L87 Difference]: Start difference. First operand 7490 states and 10157 transitions. Second operand 17 states. [2020-12-22 07:32:31,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:32:31,753 INFO L93 Difference]: Finished difference Result 33234 states and 44632 transitions. [2020-12-22 07:32:31,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-22 07:32:31,754 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 64 [2020-12-22 07:32:31,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:32:31,846 INFO L225 Difference]: With dead ends: 33234 [2020-12-22 07:32:31,846 INFO L226 Difference]: Without dead ends: 28044 [2020-12-22 07:32:31,860 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=354, Invalid=1052, Unknown=0, NotChecked=0, Total=1406 [2020-12-22 07:32:31,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28044 states. [2020-12-22 07:32:33,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28044 to 16030. [2020-12-22 07:32:33,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16030 states. [2020-12-22 07:32:33,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16030 states to 16030 states and 21637 transitions. [2020-12-22 07:32:33,541 INFO L78 Accepts]: Start accepts. Automaton has 16030 states and 21637 transitions. Word has length 64 [2020-12-22 07:32:33,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:32:33,541 INFO L481 AbstractCegarLoop]: Abstraction has 16030 states and 21637 transitions. [2020-12-22 07:32:33,541 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 07:32:33,541 INFO L276 IsEmpty]: Start isEmpty. Operand 16030 states and 21637 transitions. [2020-12-22 07:32:33,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 07:32:33,544 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:32:33,544 INFO L422 BasicCegarLoop]: trace histogram [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, 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] [2020-12-22 07:32:33,745 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-22 07:32:33,745 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:32:33,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:32:33,747 INFO L82 PathProgramCache]: Analyzing trace with hash 1317901808, now seen corresponding path program 1 times [2020-12-22 07:32:33,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:32:33,748 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937016758] [2020-12-22 07:32:33,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:32:33,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:32:33,977 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:32:33,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937016758] [2020-12-22 07:32:33,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212265349] [2020-12-22 07:32:33,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:32:34,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:32:34,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-22 07:32:34,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:32:34,212 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 07:32:34,527 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:32:34,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:32:34,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 07:32:34,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383567677] [2020-12-22 07:32:34,528 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 07:32:34,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:32:34,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 07:32:34,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2020-12-22 07:32:34,529 INFO L87 Difference]: Start difference. First operand 16030 states and 21637 transitions. Second operand 17 states. [2020-12-22 07:32:43,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:32:43,718 INFO L93 Difference]: Finished difference Result 97160 states and 129660 transitions. [2020-12-22 07:32:43,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-22 07:32:43,719 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 64 [2020-12-22 07:32:43,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:32:43,920 INFO L225 Difference]: With dead ends: 97160 [2020-12-22 07:32:43,921 INFO L226 Difference]: Without dead ends: 81154 [2020-12-22 07:32:43,961 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=596, Invalid=1660, Unknown=0, NotChecked=0, Total=2256 [2020-12-22 07:32:44,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81154 states. [2020-12-22 07:32:48,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81154 to 39242. [2020-12-22 07:32:48,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39242 states. [2020-12-22 07:32:48,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39242 states to 39242 states and 52811 transitions. [2020-12-22 07:32:48,833 INFO L78 Accepts]: Start accepts. Automaton has 39242 states and 52811 transitions. Word has length 64 [2020-12-22 07:32:48,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:32:48,833 INFO L481 AbstractCegarLoop]: Abstraction has 39242 states and 52811 transitions. [2020-12-22 07:32:48,833 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 07:32:48,833 INFO L276 IsEmpty]: Start isEmpty. Operand 39242 states and 52811 transitions. [2020-12-22 07:32:48,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 07:32:48,840 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:32:48,840 INFO L422 BasicCegarLoop]: trace histogram [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, 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] [2020-12-22 07:32:49,051 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-22 07:32:49,052 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:32:49,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:32:49,054 INFO L82 PathProgramCache]: Analyzing trace with hash -1759080090, now seen corresponding path program 1 times [2020-12-22 07:32:49,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:32:49,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414331024] [2020-12-22 07:32:49,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:32:49,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:32:49,107 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:32:49,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414331024] [2020-12-22 07:32:49,110 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:32:49,110 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:32:49,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494873740] [2020-12-22 07:32:49,114 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:32:49,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:32:49,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:32:49,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:32:49,115 INFO L87 Difference]: Start difference. First operand 39242 states and 52811 transitions. Second operand 3 states. [2020-12-22 07:32:52,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:32:52,830 INFO L93 Difference]: Finished difference Result 78462 states and 105599 transitions. [2020-12-22 07:32:52,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:32:52,831 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 07:32:52,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:32:52,894 INFO L225 Difference]: With dead ends: 78462 [2020-12-22 07:32:52,894 INFO L226 Difference]: Without dead ends: 39244 [2020-12-22 07:32:52,932 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:32:52,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39244 states. [2020-12-22 07:32:56,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39244 to 38354. [2020-12-22 07:32:56,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38354 states. [2020-12-22 07:32:56,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38354 states to 38354 states and 50591 transitions. [2020-12-22 07:32:56,371 INFO L78 Accepts]: Start accepts. Automaton has 38354 states and 50591 transitions. Word has length 64 [2020-12-22 07:32:56,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:32:56,371 INFO L481 AbstractCegarLoop]: Abstraction has 38354 states and 50591 transitions. [2020-12-22 07:32:56,371 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:32:56,371 INFO L276 IsEmpty]: Start isEmpty. Operand 38354 states and 50591 transitions. [2020-12-22 07:32:56,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 07:32:56,373 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:32:56,374 INFO L422 BasicCegarLoop]: trace histogram [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, 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] [2020-12-22 07:32:56,374 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 07:32:56,374 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:32:56,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:32:56,374 INFO L82 PathProgramCache]: Analyzing trace with hash 1288379590, now seen corresponding path program 1 times [2020-12-22 07:32:56,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:32:56,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935588675] [2020-12-22 07:32:56,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:32:56,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:32:56,413 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:32:56,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935588675] [2020-12-22 07:32:56,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:32:56,413 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:32:56,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143727373] [2020-12-22 07:32:56,414 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:32:56,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:32:56,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:32:56,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:32:56,415 INFO L87 Difference]: Start difference. First operand 38354 states and 50591 transitions. Second operand 3 states. [2020-12-22 07:32:59,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:32:59,097 INFO L93 Difference]: Finished difference Result 59942 states and 78955 transitions. [2020-12-22 07:32:59,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:32:59,098 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 07:32:59,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:32:59,132 INFO L225 Difference]: With dead ends: 59942 [2020-12-22 07:32:59,132 INFO L226 Difference]: Without dead ends: 21612 [2020-12-22 07:32:59,163 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:32:59,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21612 states. [2020-12-22 07:33:01,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21612 to 21610. [2020-12-22 07:33:01,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21610 states. [2020-12-22 07:33:01,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21610 states to 21610 states and 27781 transitions. [2020-12-22 07:33:01,196 INFO L78 Accepts]: Start accepts. Automaton has 21610 states and 27781 transitions. Word has length 64 [2020-12-22 07:33:01,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:33:01,197 INFO L481 AbstractCegarLoop]: Abstraction has 21610 states and 27781 transitions. [2020-12-22 07:33:01,197 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:33:01,197 INFO L276 IsEmpty]: Start isEmpty. Operand 21610 states and 27781 transitions. [2020-12-22 07:33:01,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 07:33:01,198 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:33:01,198 INFO L422 BasicCegarLoop]: trace histogram [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, 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] [2020-12-22 07:33:01,198 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 07:33:01,198 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:33:01,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:33:01,199 INFO L82 PathProgramCache]: Analyzing trace with hash 267493414, now seen corresponding path program 1 times [2020-12-22 07:33:01,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:33:01,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096020794] [2020-12-22 07:33:01,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:33:01,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:33:01,252 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:33:01,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096020794] [2020-12-22 07:33:01,252 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:33:01,253 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:33:01,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83533637] [2020-12-22 07:33:01,254 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:33:01,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:33:01,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:33:01,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:33:01,256 INFO L87 Difference]: Start difference. First operand 21610 states and 27781 transitions. Second operand 3 states. [2020-12-22 07:33:02,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:33:02,455 INFO L93 Difference]: Finished difference Result 30020 states and 38681 transitions. [2020-12-22 07:33:02,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:33:02,455 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 07:33:02,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:33:02,464 INFO L225 Difference]: With dead ends: 30020 [2020-12-22 07:33:02,464 INFO L226 Difference]: Without dead ends: 8434 [2020-12-22 07:33:02,477 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:33:02,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8434 states. [2020-12-22 07:33:03,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8434 to 7892. [2020-12-22 07:33:03,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7892 states. [2020-12-22 07:33:03,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7892 states to 7892 states and 10064 transitions. [2020-12-22 07:33:03,348 INFO L78 Accepts]: Start accepts. Automaton has 7892 states and 10064 transitions. Word has length 64 [2020-12-22 07:33:03,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:33:03,348 INFO L481 AbstractCegarLoop]: Abstraction has 7892 states and 10064 transitions. [2020-12-22 07:33:03,348 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:33:03,348 INFO L276 IsEmpty]: Start isEmpty. Operand 7892 states and 10064 transitions. [2020-12-22 07:33:03,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 07:33:03,349 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:33:03,350 INFO L422 BasicCegarLoop]: trace histogram [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, 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] [2020-12-22 07:33:03,350 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 07:33:03,350 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:33:03,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:33:03,350 INFO L82 PathProgramCache]: Analyzing trace with hash -1812683410, now seen corresponding path program 1 times [2020-12-22 07:33:03,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:33:03,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153113938] [2020-12-22 07:33:03,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:33:03,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:33:03,415 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 07:33:03,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153113938] [2020-12-22 07:33:03,418 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:33:03,418 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:33:03,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75364284] [2020-12-22 07:33:03,419 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 07:33:03,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:33:03,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 07:33:03,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 07:33:03,420 INFO L87 Difference]: Start difference. First operand 7892 states and 10064 transitions. Second operand 6 states. [2020-12-22 07:33:04,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:33:04,054 INFO L93 Difference]: Finished difference Result 14601 states and 18647 transitions. [2020-12-22 07:33:04,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:33:04,055 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 64 [2020-12-22 07:33:04,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:33:04,064 INFO L225 Difference]: With dead ends: 14601 [2020-12-22 07:33:04,064 INFO L226 Difference]: Without dead ends: 6770 [2020-12-22 07:33:04,072 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 07:33:04,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6770 states. [2020-12-22 07:33:04,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6770 to 6770. [2020-12-22 07:33:04,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6770 states. [2020-12-22 07:33:04,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6770 states to 6770 states and 8471 transitions. [2020-12-22 07:33:04,899 INFO L78 Accepts]: Start accepts. Automaton has 6770 states and 8471 transitions. Word has length 64 [2020-12-22 07:33:04,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:33:04,899 INFO L481 AbstractCegarLoop]: Abstraction has 6770 states and 8471 transitions. [2020-12-22 07:33:04,900 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 07:33:04,900 INFO L276 IsEmpty]: Start isEmpty. Operand 6770 states and 8471 transitions. [2020-12-22 07:33:04,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 07:33:04,906 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:33:04,907 INFO L422 BasicCegarLoop]: trace histogram [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, 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] [2020-12-22 07:33:04,907 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 07:33:04,907 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:33:04,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:33:04,908 INFO L82 PathProgramCache]: Analyzing trace with hash 923535022, now seen corresponding path program 1 times [2020-12-22 07:33:04,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:33:04,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757761980] [2020-12-22 07:33:04,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:33:04,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:33:05,034 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 07:33:05,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757761980] [2020-12-22 07:33:05,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:33:05,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 07:33:05,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529212932] [2020-12-22 07:33:05,036 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 07:33:05,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:33:05,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 07:33:05,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:33:05,037 INFO L87 Difference]: Start difference. First operand 6770 states and 8471 transitions. Second operand 7 states. [2020-12-22 07:33:05,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:33:05,937 INFO L93 Difference]: Finished difference Result 14047 states and 17666 transitions. [2020-12-22 07:33:05,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:33:05,937 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 64 [2020-12-22 07:33:05,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:33:05,948 INFO L225 Difference]: With dead ends: 14047 [2020-12-22 07:33:05,948 INFO L226 Difference]: Without dead ends: 7378 [2020-12-22 07:33:05,954 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2020-12-22 07:33:05,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7378 states. [2020-12-22 07:33:06,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7378 to 7376. [2020-12-22 07:33:06,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7376 states. [2020-12-22 07:33:06,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7376 states to 7376 states and 9205 transitions. [2020-12-22 07:33:06,716 INFO L78 Accepts]: Start accepts. Automaton has 7376 states and 9205 transitions. Word has length 64 [2020-12-22 07:33:06,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:33:06,716 INFO L481 AbstractCegarLoop]: Abstraction has 7376 states and 9205 transitions. [2020-12-22 07:33:06,716 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 07:33:06,716 INFO L276 IsEmpty]: Start isEmpty. Operand 7376 states and 9205 transitions. [2020-12-22 07:33:06,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 07:33:06,717 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:33:06,717 INFO L422 BasicCegarLoop]: trace histogram [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, 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] [2020-12-22 07:33:06,717 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 07:33:06,717 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:33:06,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:33:06,718 INFO L82 PathProgramCache]: Analyzing trace with hash 1919799259, now seen corresponding path program 1 times [2020-12-22 07:33:06,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:33:06,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294057462] [2020-12-22 07:33:06,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:33:06,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:33:07,622 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:33:07,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294057462] [2020-12-22 07:33:07,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518562602] [2020-12-22 07:33:07,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:33:07,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:33:07,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-22 07:33:07,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:33:08,033 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 07:33:08,748 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:33:08,748 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:33:08,748 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 12] total 33 [2020-12-22 07:33:08,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660633449] [2020-12-22 07:33:08,749 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-22 07:33:08,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:33:08,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-22 07:33:08,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=968, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 07:33:08,750 INFO L87 Difference]: Start difference. First operand 7376 states and 9205 transitions. Second operand 33 states. [2020-12-22 07:33:09,043 WARN L197 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 78 [2020-12-22 07:33:10,073 WARN L197 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 62 [2020-12-22 07:33:10,495 WARN L197 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 72 [2020-12-22 07:33:10,873 WARN L197 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 71 [2020-12-22 07:33:11,261 WARN L197 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 81 [2020-12-22 07:33:11,674 WARN L197 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 78 [2020-12-22 07:33:11,915 WARN L197 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 61 [2020-12-22 07:33:12,161 WARN L197 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 61 [2020-12-22 07:33:12,423 WARN L197 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 58 [2020-12-22 07:33:12,842 WARN L197 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 55 [2020-12-22 07:33:13,304 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2020-12-22 07:33:14,265 WARN L197 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 66 [2020-12-22 07:33:15,452 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 45 [2020-12-22 07:33:15,997 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2020-12-22 07:33:16,222 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 52 [2020-12-22 07:33:16,564 WARN L197 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2020-12-22 07:33:17,178 WARN L197 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 76 [2020-12-22 07:33:17,736 WARN L197 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2020-12-22 07:33:18,006 WARN L197 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 64 [2020-12-22 07:33:18,258 WARN L197 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2020-12-22 07:33:19,307 WARN L197 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 74 [2020-12-22 07:33:19,746 WARN L197 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 73 [2020-12-22 07:33:20,141 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 43 [2020-12-22 07:33:20,664 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 43 [2020-12-22 07:33:21,962 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-12-22 07:33:22,531 WARN L197 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2020-12-22 07:33:22,764 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2020-12-22 07:33:23,089 WARN L197 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 57 [2020-12-22 07:33:23,309 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 45 [2020-12-22 07:33:23,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:33:23,825 INFO L93 Difference]: Finished difference Result 17415 states and 21915 transitions. [2020-12-22 07:33:23,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-12-22 07:33:23,827 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 65 [2020-12-22 07:33:23,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:33:23,844 INFO L225 Difference]: With dead ends: 17415 [2020-12-22 07:33:23,845 INFO L226 Difference]: Without dead ends: 13816 [2020-12-22 07:33:23,852 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2010 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=1646, Invalid=7474, Unknown=0, NotChecked=0, Total=9120 [2020-12-22 07:33:23,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13816 states. [2020-12-22 07:33:24,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13816 to 6416. [2020-12-22 07:33:24,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6416 states. [2020-12-22 07:33:24,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6416 states to 6416 states and 8023 transitions. [2020-12-22 07:33:24,620 INFO L78 Accepts]: Start accepts. Automaton has 6416 states and 8023 transitions. Word has length 65 [2020-12-22 07:33:24,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:33:24,620 INFO L481 AbstractCegarLoop]: Abstraction has 6416 states and 8023 transitions. [2020-12-22 07:33:24,620 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-22 07:33:24,620 INFO L276 IsEmpty]: Start isEmpty. Operand 6416 states and 8023 transitions. [2020-12-22 07:33:24,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 07:33:24,621 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:33:24,621 INFO L422 BasicCegarLoop]: trace histogram [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, 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] [2020-12-22 07:33:24,821 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:33:24,822 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:33:24,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:33:24,824 INFO L82 PathProgramCache]: Analyzing trace with hash 417440152, now seen corresponding path program 1 times [2020-12-22 07:33:24,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:33:24,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819414263] [2020-12-22 07:33:24,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:33:24,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:33:25,827 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:33:25,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819414263] [2020-12-22 07:33:25,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106652688] [2020-12-22 07:33:25,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:33:25,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:33:25,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-22 07:33:25,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:33:26,362 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 07:33:26,692 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 30 [2020-12-22 07:33:27,156 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:33:27,156 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:33:27,156 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 13] total 34 [2020-12-22 07:33:27,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99975153] [2020-12-22 07:33:27,157 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-22 07:33:27,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:33:27,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-22 07:33:27,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1037, Unknown=0, NotChecked=0, Total=1122 [2020-12-22 07:33:27,158 INFO L87 Difference]: Start difference. First operand 6416 states and 8023 transitions. Second operand 34 states. [2020-12-22 07:33:27,523 WARN L197 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 80 [2020-12-22 07:33:28,894 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 45 [2020-12-22 07:33:29,177 WARN L197 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2020-12-22 07:33:29,639 WARN L197 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 73 [2020-12-22 07:33:30,134 WARN L197 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 85 [2020-12-22 07:33:30,709 WARN L197 SmtUtils]: Spent 472.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 82 [2020-12-22 07:33:31,012 WARN L197 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 62 [2020-12-22 07:33:31,317 WARN L197 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 62 [2020-12-22 07:33:31,665 WARN L197 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 59 [2020-12-22 07:33:31,922 WARN L197 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 59 [2020-12-22 07:33:32,255 WARN L197 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 58 [2020-12-22 07:33:32,503 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2020-12-22 07:33:32,803 WARN L197 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 56 [2020-12-22 07:33:33,041 WARN L197 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 50 [2020-12-22 07:33:33,324 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-12-22 07:33:33,601 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 35 [2020-12-22 07:33:33,909 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-12-22 07:33:34,312 WARN L197 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2020-12-22 07:33:34,639 WARN L197 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 50 [2020-12-22 07:33:35,326 WARN L197 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 48 [2020-12-22 07:33:35,546 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 37 [2020-12-22 07:33:36,134 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 41 [2020-12-22 07:33:36,426 WARN L197 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 53 [2020-12-22 07:33:36,784 WARN L197 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 53 [2020-12-22 07:33:37,060 WARN L197 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2020-12-22 07:33:37,454 WARN L197 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 65 [2020-12-22 07:33:37,799 WARN L197 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 67 [2020-12-22 07:33:38,143 WARN L197 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 64 [2020-12-22 07:33:38,629 WARN L197 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 48 [2020-12-22 07:33:39,142 WARN L197 SmtUtils]: Spent 406.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 81 [2020-12-22 07:33:39,327 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2020-12-22 07:33:39,537 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2020-12-22 07:33:39,872 WARN L197 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 48 [2020-12-22 07:33:40,431 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 35 [2020-12-22 07:33:41,122 WARN L197 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2020-12-22 07:33:41,403 WARN L197 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 54 [2020-12-22 07:33:41,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:33:41,912 INFO L93 Difference]: Finished difference Result 13238 states and 16826 transitions. [2020-12-22 07:33:41,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-12-22 07:33:41,913 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 65 [2020-12-22 07:33:41,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:33:41,929 INFO L225 Difference]: With dead ends: 13238 [2020-12-22 07:33:41,930 INFO L226 Difference]: Without dead ends: 10099 [2020-12-22 07:33:41,938 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1232 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=1234, Invalid=5572, Unknown=0, NotChecked=0, Total=6806 [2020-12-22 07:33:41,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10099 states. [2020-12-22 07:33:42,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10099 to 5375. [2020-12-22 07:33:42,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5375 states. [2020-12-22 07:33:42,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5375 states to 5375 states and 6761 transitions. [2020-12-22 07:33:42,589 INFO L78 Accepts]: Start accepts. Automaton has 5375 states and 6761 transitions. Word has length 65 [2020-12-22 07:33:42,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:33:42,589 INFO L481 AbstractCegarLoop]: Abstraction has 5375 states and 6761 transitions. [2020-12-22 07:33:42,589 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-22 07:33:42,589 INFO L276 IsEmpty]: Start isEmpty. Operand 5375 states and 6761 transitions. [2020-12-22 07:33:42,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 07:33:42,590 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:33:42,590 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, 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] [2020-12-22 07:33:42,790 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-22 07:33:42,791 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:33:42,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:33:42,792 INFO L82 PathProgramCache]: Analyzing trace with hash -242953003, now seen corresponding path program 1 times [2020-12-22 07:33:42,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:33:42,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647295132] [2020-12-22 07:33:42,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:33:42,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:33:43,349 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:33:43,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647295132] [2020-12-22 07:33:43,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734073536] [2020-12-22 07:33:43,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:33:43,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:33:43,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-22 07:33:43,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:33:43,833 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 07:33:44,326 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:33:44,327 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:33:44,327 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 24 [2020-12-22 07:33:44,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009746864] [2020-12-22 07:33:44,327 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-22 07:33:44,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:33:44,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-22 07:33:44,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2020-12-22 07:33:44,328 INFO L87 Difference]: Start difference. First operand 5375 states and 6761 transitions. Second operand 24 states. [2020-12-22 07:33:45,222 WARN L197 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 71 [2020-12-22 07:33:45,682 WARN L197 SmtUtils]: Spent 413.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 86 [2020-12-22 07:33:46,265 WARN L197 SmtUtils]: Spent 515.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 96 [2020-12-22 07:33:46,858 WARN L197 SmtUtils]: Spent 473.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 94 [2020-12-22 07:33:47,465 WARN L197 SmtUtils]: Spent 402.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 85 [2020-12-22 07:33:47,902 WARN L197 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 77 [2020-12-22 07:33:48,507 WARN L197 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 72 [2020-12-22 07:33:48,847 WARN L197 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 72 [2020-12-22 07:33:49,310 WARN L197 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 80 [2020-12-22 07:33:49,775 WARN L197 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 76 [2020-12-22 07:33:51,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:33:51,083 INFO L93 Difference]: Finished difference Result 8675 states and 11118 transitions. [2020-12-22 07:33:51,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-22 07:33:51,084 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 67 [2020-12-22 07:33:51,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:33:51,085 INFO L225 Difference]: With dead ends: 8675 [2020-12-22 07:33:51,085 INFO L226 Difference]: Without dead ends: 0 [2020-12-22 07:33:51,090 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=359, Invalid=1281, Unknown=0, NotChecked=0, Total=1640 [2020-12-22 07:33:51,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-22 07:33:51,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-22 07:33:51,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-22 07:33:51,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-22 07:33:51,090 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 67 [2020-12-22 07:33:51,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:33:51,090 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-22 07:33:51,091 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-22 07:33:51,091 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-22 07:33:51,091 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-22 07:33:51,291 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:33:51,295 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-12-22 07:34:07,954 WARN L197 SmtUtils]: Spent 16.63 s on a formula simplification. DAG size of input: 1794 DAG size of output: 1674 [2020-12-22 07:34:23,954 WARN L197 SmtUtils]: Spent 15.98 s on a formula simplification. DAG size of input: 1908 DAG size of output: 1764 [2020-12-22 07:34:40,263 WARN L197 SmtUtils]: Spent 16.27 s on a formula simplification. DAG size of input: 1868 DAG size of output: 1792 [2020-12-22 07:35:30,460 WARN L197 SmtUtils]: Spent 50.17 s on a formula simplification. DAG size of input: 3113 DAG size of output: 2864 [2020-12-22 07:35:46,354 WARN L197 SmtUtils]: Spent 15.87 s on a formula simplification. DAG size of input: 1839 DAG size of output: 1804 [2020-12-22 07:36:01,853 WARN L197 SmtUtils]: Spent 15.48 s on a formula simplification. DAG size of input: 1742 DAG size of output: 1623