/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/combinations/pals_lcr.5.ufo.UNBOUNDED.pals+Problem12_label02.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 09:56:36,040 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 09:56:36,043 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 09:56:36,082 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 09:56:36,083 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 09:56:36,084 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 09:56:36,086 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 09:56:36,089 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 09:56:36,091 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 09:56:36,092 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 09:56:36,094 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 09:56:36,095 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 09:56:36,096 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 09:56:36,097 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 09:56:36,099 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 09:56:36,100 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 09:56:36,102 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 09:56:36,103 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 09:56:36,105 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 09:56:36,122 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 09:56:36,125 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 09:56:36,126 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 09:56:36,128 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 09:56:36,129 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 09:56:36,132 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 09:56:36,139 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 09:56:36,140 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 09:56:36,141 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 09:56:36,145 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 09:56:36,149 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 09:56:36,150 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 09:56:36,151 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 09:56:36,151 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 09:56:36,152 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 09:56:36,152 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 09:56:36,153 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 09:56:36,154 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 09:56:36,207 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 09:56:36,207 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 09:56:36,212 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 09:56:36,212 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 09:56:36,212 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 09:56:36,213 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 09:56:36,213 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 09:56:36,213 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 09:56:36,213 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 09:56:36,213 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 09:56:36,214 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 09:56:36,215 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 09:56:36,215 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 09:56:36,215 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 09:56:36,215 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 09:56:36,216 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 09:56:36,216 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 09:56:36,216 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 09:56:36,216 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 09:56:36,216 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 09:56:36,216 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 09:56:36,217 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 09:56:36,217 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 09:56:36,217 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 09:56:36,217 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 09:56:36,217 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 09:56:36,676 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 09:56:36,726 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 09:56:36,729 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 09:56:36,730 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 09:56:36,731 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 09:56:36,732 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.5.ufo.UNBOUNDED.pals+Problem12_label02.c [2020-12-22 09:56:36,826 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/91888b514/d8b7b8c607b541feb4113a866918ebc6/FLAG87552aec4 [2020-12-22 09:56:37,934 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 09:56:37,935 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.5.ufo.UNBOUNDED.pals+Problem12_label02.c [2020-12-22 09:56:37,980 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/91888b514/d8b7b8c607b541feb4113a866918ebc6/FLAG87552aec4 [2020-12-22 09:56:38,371 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/91888b514/d8b7b8c607b541feb4113a866918ebc6 [2020-12-22 09:56:38,374 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 09:56:38,377 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 09:56:38,382 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 09:56:38,382 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 09:56:38,388 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 09:56:38,389 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:56:38" (1/1) ... [2020-12-22 09:56:38,391 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36aaadf8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:56:38, skipping insertion in model container [2020-12-22 09:56:38,391 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:56:38" (1/1) ... [2020-12-22 09:56:38,401 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 09:56:38,585 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 09:56:38,933 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/combinations/pals_lcr.5.ufo.UNBOUNDED.pals+Problem12_label02.c[11758,11771] [2020-12-22 09:56:39,039 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/combinations/pals_lcr.5.ufo.UNBOUNDED.pals+Problem12_label02.c[18805,18818] [2020-12-22 09:56:40,056 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:56:40,071 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 09:56:40,143 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/combinations/pals_lcr.5.ufo.UNBOUNDED.pals+Problem12_label02.c[11758,11771] [2020-12-22 09:56:40,159 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/combinations/pals_lcr.5.ufo.UNBOUNDED.pals+Problem12_label02.c[18805,18818] [2020-12-22 09:56:40,834 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:56:40,901 INFO L208 MainTranslator]: Completed translation [2020-12-22 09:56:40,902 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:56:40 WrapperNode [2020-12-22 09:56:40,903 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 09:56:40,904 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 09:56:40,908 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 09:56:40,909 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 09:56:40,918 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:56:40" (1/1) ... [2020-12-22 09:56:40,985 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:56:40" (1/1) ... [2020-12-22 09:56:41,381 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 09:56:41,382 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 09:56:41,382 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 09:56:41,383 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 09:56:41,393 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:56:40" (1/1) ... [2020-12-22 09:56:41,393 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:56:40" (1/1) ... [2020-12-22 09:56:41,481 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:56:40" (1/1) ... [2020-12-22 09:56:41,482 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:56:40" (1/1) ... [2020-12-22 09:56:41,824 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:56:40" (1/1) ... [2020-12-22 09:56:41,869 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:56:40" (1/1) ... [2020-12-22 09:56:41,958 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:56:40" (1/1) ... [2020-12-22 09:56:42,072 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 09:56:42,073 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 09:56:42,073 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 09:56:42,073 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 09:56:42,074 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:56:40" (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 09:56:42,187 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 09:56:42,188 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 09:56:42,188 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 09:56:42,188 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 09:56:49,040 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 09:56:49,040 INFO L299 CfgBuilder]: Removed 36 assume(true) statements. [2020-12-22 09:56:49,044 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:56:49 BoogieIcfgContainer [2020-12-22 09:56:49,044 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 09:56:49,046 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 09:56:49,047 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 09:56:49,051 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 09:56:49,051 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 09:56:38" (1/3) ... [2020-12-22 09:56:49,052 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20aaaa13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:56:49, skipping insertion in model container [2020-12-22 09:56:49,052 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:56:40" (2/3) ... [2020-12-22 09:56:49,053 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20aaaa13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:56:49, skipping insertion in model container [2020-12-22 09:56:49,053 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:56:49" (3/3) ... [2020-12-22 09:56:49,055 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.5.ufo.UNBOUNDED.pals+Problem12_label02.c [2020-12-22 09:56:49,063 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 09:56:49,069 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 09:56:49,091 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 09:56:49,128 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 09:56:49,128 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 09:56:49,129 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 09:56:49,129 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 09:56:49,129 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 09:56:49,129 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 09:56:49,129 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 09:56:49,129 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 09:56:49,166 INFO L276 IsEmpty]: Start isEmpty. Operand 910 states. [2020-12-22 09:56:49,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-22 09:56:49,176 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:56:49,178 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] [2020-12-22 09:56:49,178 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:56:49,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:56:49,185 INFO L82 PathProgramCache]: Analyzing trace with hash -1083425478, now seen corresponding path program 1 times [2020-12-22 09:56:49,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:56:49,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774006167] [2020-12-22 09:56:49,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:56:49,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:56:49,484 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 09:56:49,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774006167] [2020-12-22 09:56:49,486 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:56:49,487 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 09:56:49,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259103345] [2020-12-22 09:56:49,494 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 09:56:49,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:56:49,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 09:56:49,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 09:56:49,523 INFO L87 Difference]: Start difference. First operand 910 states. Second operand 2 states. [2020-12-22 09:56:49,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:56:49,637 INFO L93 Difference]: Finished difference Result 1781 states and 3376 transitions. [2020-12-22 09:56:49,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 09:56:49,639 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 34 [2020-12-22 09:56:49,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:56:49,692 INFO L225 Difference]: With dead ends: 1781 [2020-12-22 09:56:49,693 INFO L226 Difference]: Without dead ends: 844 [2020-12-22 09:56:49,710 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 09:56:49,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 844 states. [2020-12-22 09:56:49,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 844 to 844. [2020-12-22 09:56:49,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 844 states. [2020-12-22 09:56:49,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 844 states to 844 states and 1591 transitions. [2020-12-22 09:56:49,850 INFO L78 Accepts]: Start accepts. Automaton has 844 states and 1591 transitions. Word has length 34 [2020-12-22 09:56:49,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:56:49,851 INFO L481 AbstractCegarLoop]: Abstraction has 844 states and 1591 transitions. [2020-12-22 09:56:49,851 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 09:56:49,851 INFO L276 IsEmpty]: Start isEmpty. Operand 844 states and 1591 transitions. [2020-12-22 09:56:49,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-22 09:56:49,859 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:56:49,859 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] [2020-12-22 09:56:49,860 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 09:56:49,861 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:56:49,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:56:49,862 INFO L82 PathProgramCache]: Analyzing trace with hash -1592898568, now seen corresponding path program 1 times [2020-12-22 09:56:49,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:56:49,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494869325] [2020-12-22 09:56:49,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:56:49,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:56:50,051 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 09:56:50,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494869325] [2020-12-22 09:56:50,053 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:56:50,053 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:56:50,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097326573] [2020-12-22 09:56:50,055 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:56:50,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:56:50,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:56:50,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:56:50,057 INFO L87 Difference]: Start difference. First operand 844 states and 1591 transitions. Second operand 5 states. [2020-12-22 09:56:50,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:56:50,255 INFO L93 Difference]: Finished difference Result 901 states and 1679 transitions. [2020-12-22 09:56:50,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:56:50,256 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2020-12-22 09:56:50,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:56:50,262 INFO L225 Difference]: With dead ends: 901 [2020-12-22 09:56:50,262 INFO L226 Difference]: Without dead ends: 844 [2020-12-22 09:56:50,264 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 09:56:50,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 844 states. [2020-12-22 09:56:50,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 844 to 844. [2020-12-22 09:56:50,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 844 states. [2020-12-22 09:56:50,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 844 states to 844 states and 1560 transitions. [2020-12-22 09:56:50,291 INFO L78 Accepts]: Start accepts. Automaton has 844 states and 1560 transitions. Word has length 34 [2020-12-22 09:56:50,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:56:50,292 INFO L481 AbstractCegarLoop]: Abstraction has 844 states and 1560 transitions. [2020-12-22 09:56:50,292 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:56:50,293 INFO L276 IsEmpty]: Start isEmpty. Operand 844 states and 1560 transitions. [2020-12-22 09:56:50,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 09:56:50,300 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:56:50,300 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:56:50,301 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 09:56:50,301 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:56:50,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:56:50,303 INFO L82 PathProgramCache]: Analyzing trace with hash 1739586035, now seen corresponding path program 1 times [2020-12-22 09:56:50,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:56:50,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115518648] [2020-12-22 09:56:50,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:56:50,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:56:50,637 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 09:56:50,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115518648] [2020-12-22 09:56:50,638 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:56:50,638 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:56:50,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032454572] [2020-12-22 09:56:50,639 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:56:50,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:56:50,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:56:50,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:56:50,641 INFO L87 Difference]: Start difference. First operand 844 states and 1560 transitions. Second operand 4 states. [2020-12-22 09:57:02,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:57:02,297 INFO L93 Difference]: Finished difference Result 3099 states and 5869 transitions. [2020-12-22 09:57:02,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:57:02,299 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 63 [2020-12-22 09:57:02,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:57:02,316 INFO L225 Difference]: With dead ends: 3099 [2020-12-22 09:57:02,317 INFO L226 Difference]: Without dead ends: 2346 [2020-12-22 09:57:02,319 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:57:02,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2346 states. [2020-12-22 09:57:02,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2346 to 2346. [2020-12-22 09:57:02,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2346 states. [2020-12-22 09:57:02,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2346 states to 2346 states and 3536 transitions. [2020-12-22 09:57:02,396 INFO L78 Accepts]: Start accepts. Automaton has 2346 states and 3536 transitions. Word has length 63 [2020-12-22 09:57:02,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:57:02,397 INFO L481 AbstractCegarLoop]: Abstraction has 2346 states and 3536 transitions. [2020-12-22 09:57:02,397 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:57:02,397 INFO L276 IsEmpty]: Start isEmpty. Operand 2346 states and 3536 transitions. [2020-12-22 09:57:02,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:57:02,399 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:57:02,399 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:57:02,399 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 09:57:02,399 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:57:02,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:57:02,400 INFO L82 PathProgramCache]: Analyzing trace with hash -1337087153, now seen corresponding path program 1 times [2020-12-22 09:57:02,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:57:02,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309668716] [2020-12-22 09:57:02,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:57:02,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:02,496 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 09:57:02,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309668716] [2020-12-22 09:57:02,497 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:57:02,497 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:57:02,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837582315] [2020-12-22 09:57:02,498 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:57:02,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:57:02,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:57:02,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:57:02,500 INFO L87 Difference]: Start difference. First operand 2346 states and 3536 transitions. Second operand 3 states. [2020-12-22 09:57:02,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:57:02,567 INFO L93 Difference]: Finished difference Result 2446 states and 3694 transitions. [2020-12-22 09:57:02,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:57:02,568 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 09:57:02,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:57:02,583 INFO L225 Difference]: With dead ends: 2446 [2020-12-22 09:57:02,583 INFO L226 Difference]: Without dead ends: 2393 [2020-12-22 09:57:02,585 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 09:57:02,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2393 states. [2020-12-22 09:57:02,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2393 to 2391. [2020-12-22 09:57:02,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2391 states. [2020-12-22 09:57:02,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2391 states to 2391 states and 3608 transitions. [2020-12-22 09:57:02,658 INFO L78 Accepts]: Start accepts. Automaton has 2391 states and 3608 transitions. Word has length 64 [2020-12-22 09:57:02,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:57:02,659 INFO L481 AbstractCegarLoop]: Abstraction has 2391 states and 3608 transitions. [2020-12-22 09:57:02,659 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:57:02,660 INFO L276 IsEmpty]: Start isEmpty. Operand 2391 states and 3608 transitions. [2020-12-22 09:57:02,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:57:02,661 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:57:02,661 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:57:02,661 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 09:57:02,662 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:57:02,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:57:02,662 INFO L82 PathProgramCache]: Analyzing trace with hash -119101755, now seen corresponding path program 1 times [2020-12-22 09:57:02,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:57:02,663 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594510325] [2020-12-22 09:57:02,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:57:02,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:02,869 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 09:57:02,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594510325] [2020-12-22 09:57:02,871 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:57:02,871 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:57:02,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153309666] [2020-12-22 09:57:02,873 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:57:02,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:57:02,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:57:02,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:57:02,875 INFO L87 Difference]: Start difference. First operand 2391 states and 3608 transitions. Second operand 7 states. [2020-12-22 09:57:03,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:57:03,242 INFO L93 Difference]: Finished difference Result 3371 states and 5168 transitions. [2020-12-22 09:57:03,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 09:57:03,243 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 64 [2020-12-22 09:57:03,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:57:03,264 INFO L225 Difference]: With dead ends: 3371 [2020-12-22 09:57:03,264 INFO L226 Difference]: Without dead ends: 3273 [2020-12-22 09:57:03,267 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-12-22 09:57:03,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3273 states. [2020-12-22 09:57:03,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3273 to 2487. [2020-12-22 09:57:03,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2487 states. [2020-12-22 09:57:03,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2487 states to 2487 states and 3759 transitions. [2020-12-22 09:57:03,374 INFO L78 Accepts]: Start accepts. Automaton has 2487 states and 3759 transitions. Word has length 64 [2020-12-22 09:57:03,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:57:03,376 INFO L481 AbstractCegarLoop]: Abstraction has 2487 states and 3759 transitions. [2020-12-22 09:57:03,376 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:57:03,376 INFO L276 IsEmpty]: Start isEmpty. Operand 2487 states and 3759 transitions. [2020-12-22 09:57:03,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:57:03,377 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:57:03,378 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, 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 09:57:03,378 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 09:57:03,378 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:57:03,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:57:03,379 INFO L82 PathProgramCache]: Analyzing trace with hash 91634997, now seen corresponding path program 1 times [2020-12-22 09:57:03,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:57:03,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741527570] [2020-12-22 09:57:03,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:57:03,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:03,522 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 09:57:03,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741527570] [2020-12-22 09:57:03,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:57:03,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:57:03,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801221754] [2020-12-22 09:57:03,524 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:57:03,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:57:03,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:57:03,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:57:03,525 INFO L87 Difference]: Start difference. First operand 2487 states and 3759 transitions. Second operand 3 states. [2020-12-22 09:57:03,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:57:03,623 INFO L93 Difference]: Finished difference Result 2853 states and 4335 transitions. [2020-12-22 09:57:03,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:57:03,625 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 66 [2020-12-22 09:57:03,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:57:03,643 INFO L225 Difference]: With dead ends: 2853 [2020-12-22 09:57:03,644 INFO L226 Difference]: Without dead ends: 2659 [2020-12-22 09:57:03,649 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 09:57:03,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2659 states. [2020-12-22 09:57:03,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2659 to 2653. [2020-12-22 09:57:03,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2653 states. [2020-12-22 09:57:03,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2653 states to 2653 states and 4013 transitions. [2020-12-22 09:57:03,763 INFO L78 Accepts]: Start accepts. Automaton has 2653 states and 4013 transitions. Word has length 66 [2020-12-22 09:57:03,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:57:03,763 INFO L481 AbstractCegarLoop]: Abstraction has 2653 states and 4013 transitions. [2020-12-22 09:57:03,763 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:57:03,764 INFO L276 IsEmpty]: Start isEmpty. Operand 2653 states and 4013 transitions. [2020-12-22 09:57:03,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:57:03,765 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:57:03,765 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, 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 09:57:03,766 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 09:57:03,767 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:57:03,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:57:03,771 INFO L82 PathProgramCache]: Analyzing trace with hash 158128509, now seen corresponding path program 1 times [2020-12-22 09:57:03,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:57:03,772 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871502959] [2020-12-22 09:57:03,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:57:03,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:04,061 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 09:57:04,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871502959] [2020-12-22 09:57:04,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:57:04,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:57:04,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305506192] [2020-12-22 09:57:04,063 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:57:04,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:57:04,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:57:04,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:57:04,065 INFO L87 Difference]: Start difference. First operand 2653 states and 4013 transitions. Second operand 7 states. [2020-12-22 09:57:04,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:57:04,385 INFO L93 Difference]: Finished difference Result 3015 states and 4575 transitions. [2020-12-22 09:57:04,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:57:04,386 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 66 [2020-12-22 09:57:04,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:57:04,402 INFO L225 Difference]: With dead ends: 3015 [2020-12-22 09:57:04,403 INFO L226 Difference]: Without dead ends: 2655 [2020-12-22 09:57:04,405 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2020-12-22 09:57:04,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2655 states. [2020-12-22 09:57:04,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2655 to 2653. [2020-12-22 09:57:04,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2653 states. [2020-12-22 09:57:04,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2653 states to 2653 states and 4009 transitions. [2020-12-22 09:57:04,507 INFO L78 Accepts]: Start accepts. Automaton has 2653 states and 4009 transitions. Word has length 66 [2020-12-22 09:57:04,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:57:04,508 INFO L481 AbstractCegarLoop]: Abstraction has 2653 states and 4009 transitions. [2020-12-22 09:57:04,509 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:57:04,509 INFO L276 IsEmpty]: Start isEmpty. Operand 2653 states and 4009 transitions. [2020-12-22 09:57:04,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:57:04,510 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:57:04,510 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, 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 09:57:04,511 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 09:57:04,511 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:57:04,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:57:04,512 INFO L82 PathProgramCache]: Analyzing trace with hash -1100417095, now seen corresponding path program 1 times [2020-12-22 09:57:04,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:57:04,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172798149] [2020-12-22 09:57:04,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:57:04,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:04,572 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 09:57:04,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172798149] [2020-12-22 09:57:04,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:57:04,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:57:04,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829987186] [2020-12-22 09:57:04,574 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:57:04,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:57:04,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:57:04,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:57:04,575 INFO L87 Difference]: Start difference. First operand 2653 states and 4009 transitions. Second operand 3 states. [2020-12-22 09:57:04,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:57:04,668 INFO L93 Difference]: Finished difference Result 3325 states and 5043 transitions. [2020-12-22 09:57:04,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:57:04,669 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 66 [2020-12-22 09:57:04,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:57:04,687 INFO L225 Difference]: With dead ends: 3325 [2020-12-22 09:57:04,687 INFO L226 Difference]: Without dead ends: 2965 [2020-12-22 09:57:04,689 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 09:57:04,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2965 states. [2020-12-22 09:57:04,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2965 to 2963. [2020-12-22 09:57:04,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2963 states. [2020-12-22 09:57:04,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2963 states to 2963 states and 4477 transitions. [2020-12-22 09:57:04,823 INFO L78 Accepts]: Start accepts. Automaton has 2963 states and 4477 transitions. Word has length 66 [2020-12-22 09:57:04,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:57:04,824 INFO L481 AbstractCegarLoop]: Abstraction has 2963 states and 4477 transitions. [2020-12-22 09:57:04,824 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:57:04,824 INFO L276 IsEmpty]: Start isEmpty. Operand 2963 states and 4477 transitions. [2020-12-22 09:57:04,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:57:04,826 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:57:04,826 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, 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 09:57:04,826 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 09:57:04,827 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:57:04,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:57:04,827 INFO L82 PathProgramCache]: Analyzing trace with hash -826729383, now seen corresponding path program 1 times [2020-12-22 09:57:04,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:57:04,833 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392836116] [2020-12-22 09:57:04,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:57:04,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:04,900 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 09:57:04,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392836116] [2020-12-22 09:57:04,901 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:57:04,901 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:57:04,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602580525] [2020-12-22 09:57:04,902 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:57:04,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:57:04,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:57:04,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:57:04,903 INFO L87 Difference]: Start difference. First operand 2963 states and 4477 transitions. Second operand 3 states. [2020-12-22 09:57:05,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:57:05,052 INFO L93 Difference]: Finished difference Result 4207 states and 6367 transitions. [2020-12-22 09:57:05,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:57:05,053 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 66 [2020-12-22 09:57:05,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:57:05,075 INFO L225 Difference]: With dead ends: 4207 [2020-12-22 09:57:05,075 INFO L226 Difference]: Without dead ends: 3537 [2020-12-22 09:57:05,079 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 09:57:05,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3537 states. [2020-12-22 09:57:05,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3537 to 3535. [2020-12-22 09:57:05,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3535 states. [2020-12-22 09:57:05,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3535 states to 3535 states and 5325 transitions. [2020-12-22 09:57:05,270 INFO L78 Accepts]: Start accepts. Automaton has 3535 states and 5325 transitions. Word has length 66 [2020-12-22 09:57:05,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:57:05,270 INFO L481 AbstractCegarLoop]: Abstraction has 3535 states and 5325 transitions. [2020-12-22 09:57:05,270 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:57:05,270 INFO L276 IsEmpty]: Start isEmpty. Operand 3535 states and 5325 transitions. [2020-12-22 09:57:05,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:57:05,279 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:57:05,279 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, 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 09:57:05,279 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 09:57:05,280 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:57:05,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:57:05,280 INFO L82 PathProgramCache]: Analyzing trace with hash 992342265, now seen corresponding path program 1 times [2020-12-22 09:57:05,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:57:05,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266057039] [2020-12-22 09:57:05,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:57:05,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:05,357 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 09:57:05,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266057039] [2020-12-22 09:57:05,358 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:57:05,358 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:57:05,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931138962] [2020-12-22 09:57:05,359 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:57:05,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:57:05,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:57:05,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:57:05,365 INFO L87 Difference]: Start difference. First operand 3535 states and 5325 transitions. Second operand 3 states. [2020-12-22 09:57:05,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:57:05,577 INFO L93 Difference]: Finished difference Result 5827 states and 8751 transitions. [2020-12-22 09:57:05,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:57:05,578 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 66 [2020-12-22 09:57:05,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:57:05,624 INFO L225 Difference]: With dead ends: 5827 [2020-12-22 09:57:05,625 INFO L226 Difference]: Without dead ends: 4585 [2020-12-22 09:57:05,632 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 09:57:05,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4585 states. [2020-12-22 09:57:05,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4585 to 4583. [2020-12-22 09:57:05,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4583 states. [2020-12-22 09:57:05,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4583 states to 4583 states and 6845 transitions. [2020-12-22 09:57:05,874 INFO L78 Accepts]: Start accepts. Automaton has 4583 states and 6845 transitions. Word has length 66 [2020-12-22 09:57:05,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:57:05,875 INFO L481 AbstractCegarLoop]: Abstraction has 4583 states and 6845 transitions. [2020-12-22 09:57:05,875 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:57:05,875 INFO L276 IsEmpty]: Start isEmpty. Operand 4583 states and 6845 transitions. [2020-12-22 09:57:05,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 09:57:05,876 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:57:05,876 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, 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 09:57:05,876 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 09:57:05,877 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:57:05,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:57:05,877 INFO L82 PathProgramCache]: Analyzing trace with hash 192293446, now seen corresponding path program 1 times [2020-12-22 09:57:05,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:57:05,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463824209] [2020-12-22 09:57:05,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:57:05,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:05,981 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 09:57:05,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463824209] [2020-12-22 09:57:05,981 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:57:05,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:57:05,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80128413] [2020-12-22 09:57:05,982 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:57:05,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:57:05,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:57:05,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:57:05,985 INFO L87 Difference]: Start difference. First operand 4583 states and 6845 transitions. Second operand 5 states. [2020-12-22 09:57:06,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:57:06,357 INFO L93 Difference]: Finished difference Result 6309 states and 9347 transitions. [2020-12-22 09:57:06,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:57:06,358 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 67 [2020-12-22 09:57:06,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:57:06,376 INFO L225 Difference]: With dead ends: 6309 [2020-12-22 09:57:06,377 INFO L226 Difference]: Without dead ends: 6307 [2020-12-22 09:57:06,381 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 09:57:06,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6307 states. [2020-12-22 09:57:06,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6307 to 4679. [2020-12-22 09:57:06,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4679 states. [2020-12-22 09:57:06,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4679 states to 4679 states and 6925 transitions. [2020-12-22 09:57:06,670 INFO L78 Accepts]: Start accepts. Automaton has 4679 states and 6925 transitions. Word has length 67 [2020-12-22 09:57:06,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:57:06,670 INFO L481 AbstractCegarLoop]: Abstraction has 4679 states and 6925 transitions. [2020-12-22 09:57:06,671 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:57:06,671 INFO L276 IsEmpty]: Start isEmpty. Operand 4679 states and 6925 transitions. [2020-12-22 09:57:06,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 09:57:06,672 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:57:06,672 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, 1, 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 09:57:06,672 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 09:57:06,672 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:57:06,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:57:06,673 INFO L82 PathProgramCache]: Analyzing trace with hash -1338319212, now seen corresponding path program 1 times [2020-12-22 09:57:06,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:57:06,674 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291896989] [2020-12-22 09:57:06,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:57:06,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:06,806 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 09:57:06,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291896989] [2020-12-22 09:57:06,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:57:06,807 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:57:06,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442032860] [2020-12-22 09:57:06,808 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:57:06,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:57:06,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:57:06,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:57:06,809 INFO L87 Difference]: Start difference. First operand 4679 states and 6925 transitions. Second operand 3 states. [2020-12-22 09:57:07,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:57:07,106 INFO L93 Difference]: Finished difference Result 7118 states and 10515 transitions. [2020-12-22 09:57:07,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:57:07,107 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 68 [2020-12-22 09:57:07,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:57:07,122 INFO L225 Difference]: With dead ends: 7118 [2020-12-22 09:57:07,123 INFO L226 Difference]: Without dead ends: 5771 [2020-12-22 09:57:07,127 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 09:57:07,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5771 states. [2020-12-22 09:57:07,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5771 to 5769. [2020-12-22 09:57:07,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5769 states. [2020-12-22 09:57:07,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5769 states to 5769 states and 8479 transitions. [2020-12-22 09:57:07,508 INFO L78 Accepts]: Start accepts. Automaton has 5769 states and 8479 transitions. Word has length 68 [2020-12-22 09:57:07,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:57:07,508 INFO L481 AbstractCegarLoop]: Abstraction has 5769 states and 8479 transitions. [2020-12-22 09:57:07,508 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:57:07,508 INFO L276 IsEmpty]: Start isEmpty. Operand 5769 states and 8479 transitions. [2020-12-22 09:57:07,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 09:57:07,512 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:57:07,513 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:57:07,513 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 09:57:07,513 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:57:07,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:57:07,514 INFO L82 PathProgramCache]: Analyzing trace with hash 320828100, now seen corresponding path program 1 times [2020-12-22 09:57:07,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:57:07,514 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001083069] [2020-12-22 09:57:07,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:57:07,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:07,647 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-22 09:57:07,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001083069] [2020-12-22 09:57:07,648 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:57:07,648 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:57:07,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731814694] [2020-12-22 09:57:07,649 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:57:07,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:57:07,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:57:07,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:57:07,650 INFO L87 Difference]: Start difference. First operand 5769 states and 8479 transitions. Second operand 7 states. [2020-12-22 09:57:09,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:57:09,096 INFO L93 Difference]: Finished difference Result 23845 states and 34581 transitions. [2020-12-22 09:57:09,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:57:09,097 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 94 [2020-12-22 09:57:09,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:57:09,143 INFO L225 Difference]: With dead ends: 23845 [2020-12-22 09:57:09,143 INFO L226 Difference]: Without dead ends: 20371 [2020-12-22 09:57:09,156 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:57:09,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20371 states. [2020-12-22 09:57:09,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20371 to 9241. [2020-12-22 09:57:09,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9241 states. [2020-12-22 09:57:09,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9241 states to 9241 states and 13455 transitions. [2020-12-22 09:57:09,941 INFO L78 Accepts]: Start accepts. Automaton has 9241 states and 13455 transitions. Word has length 94 [2020-12-22 09:57:09,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:57:09,942 INFO L481 AbstractCegarLoop]: Abstraction has 9241 states and 13455 transitions. [2020-12-22 09:57:09,942 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:57:09,942 INFO L276 IsEmpty]: Start isEmpty. Operand 9241 states and 13455 transitions. [2020-12-22 09:57:09,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 09:57:09,946 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:57:09,946 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:57:09,947 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 09:57:09,947 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:57:09,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:57:09,947 INFO L82 PathProgramCache]: Analyzing trace with hash 350350318, now seen corresponding path program 1 times [2020-12-22 09:57:09,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:57:09,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949544439] [2020-12-22 09:57:09,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:57:09,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:10,088 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-22 09:57:10,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949544439] [2020-12-22 09:57:10,089 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:57:10,089 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:57:10,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806898514] [2020-12-22 09:57:10,089 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:57:10,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:57:10,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:57:10,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:57:10,090 INFO L87 Difference]: Start difference. First operand 9241 states and 13455 transitions. Second operand 7 states. [2020-12-22 09:57:11,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:57:11,752 INFO L93 Difference]: Finished difference Result 27317 states and 39557 transitions. [2020-12-22 09:57:11,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:57:11,753 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 94 [2020-12-22 09:57:11,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:57:11,803 INFO L225 Difference]: With dead ends: 27317 [2020-12-22 09:57:11,804 INFO L226 Difference]: Without dead ends: 23843 [2020-12-22 09:57:11,816 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:57:11,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23843 states. [2020-12-22 09:57:12,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23843 to 14457. [2020-12-22 09:57:12,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14457 states. [2020-12-22 09:57:12,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14457 states to 14457 states and 20879 transitions. [2020-12-22 09:57:12,999 INFO L78 Accepts]: Start accepts. Automaton has 14457 states and 20879 transitions. Word has length 94 [2020-12-22 09:57:12,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:57:12,999 INFO L481 AbstractCegarLoop]: Abstraction has 14457 states and 20879 transitions. [2020-12-22 09:57:12,999 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:57:12,999 INFO L276 IsEmpty]: Start isEmpty. Operand 14457 states and 20879 transitions. [2020-12-22 09:57:13,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 09:57:13,004 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:57:13,004 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:57:13,004 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 09:57:13,004 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:57:13,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:57:13,005 INFO L82 PathProgramCache]: Analyzing trace with hash 624038030, now seen corresponding path program 1 times [2020-12-22 09:57:13,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:57:13,006 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793678751] [2020-12-22 09:57:13,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:57:13,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:13,124 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 09:57:13,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793678751] [2020-12-22 09:57:13,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:57:13,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:57:13,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705723085] [2020-12-22 09:57:13,126 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:57:13,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:57:13,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:57:13,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:57:13,127 INFO L87 Difference]: Start difference. First operand 14457 states and 20879 transitions. Second operand 7 states. [2020-12-22 09:57:14,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:57:14,610 INFO L93 Difference]: Finished difference Result 30789 states and 44533 transitions. [2020-12-22 09:57:14,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:57:14,611 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 94 [2020-12-22 09:57:14,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:57:14,677 INFO L225 Difference]: With dead ends: 30789 [2020-12-22 09:57:14,677 INFO L226 Difference]: Without dead ends: 27315 [2020-12-22 09:57:14,692 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:57:14,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27315 states. [2020-12-22 09:57:16,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27315 to 17929. [2020-12-22 09:57:16,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17929 states. [2020-12-22 09:57:16,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17929 states to 17929 states and 25855 transitions. [2020-12-22 09:57:16,256 INFO L78 Accepts]: Start accepts. Automaton has 17929 states and 25855 transitions. Word has length 94 [2020-12-22 09:57:16,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:57:16,257 INFO L481 AbstractCegarLoop]: Abstraction has 17929 states and 25855 transitions. [2020-12-22 09:57:16,257 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:57:16,257 INFO L276 IsEmpty]: Start isEmpty. Operand 17929 states and 25855 transitions. [2020-12-22 09:57:16,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 09:57:16,262 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:57:16,262 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:57:16,262 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 09:57:16,263 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:57:16,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:57:16,263 INFO L82 PathProgramCache]: Analyzing trace with hash -1851857618, now seen corresponding path program 1 times [2020-12-22 09:57:16,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:57:16,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782888199] [2020-12-22 09:57:16,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:57:16,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:16,389 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 09:57:16,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782888199] [2020-12-22 09:57:16,390 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:57:16,390 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:57:16,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311410583] [2020-12-22 09:57:16,391 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:57:16,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:57:16,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:57:16,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:57:16,392 INFO L87 Difference]: Start difference. First operand 17929 states and 25855 transitions. Second operand 7 states. [2020-12-22 09:57:17,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:57:17,968 INFO L93 Difference]: Finished difference Result 34261 states and 49509 transitions. [2020-12-22 09:57:17,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:57:17,969 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 94 [2020-12-22 09:57:17,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:57:18,032 INFO L225 Difference]: With dead ends: 34261 [2020-12-22 09:57:18,032 INFO L226 Difference]: Without dead ends: 30787 [2020-12-22 09:57:18,045 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:57:18,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30787 states. [2020-12-22 09:57:19,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30787 to 21401. [2020-12-22 09:57:19,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21401 states. [2020-12-22 09:57:19,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21401 states to 21401 states and 30831 transitions. [2020-12-22 09:57:19,424 INFO L78 Accepts]: Start accepts. Automaton has 21401 states and 30831 transitions. Word has length 94 [2020-12-22 09:57:19,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:57:19,424 INFO L481 AbstractCegarLoop]: Abstraction has 21401 states and 30831 transitions. [2020-12-22 09:57:19,424 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:57:19,424 INFO L276 IsEmpty]: Start isEmpty. Operand 21401 states and 30831 transitions. [2020-12-22 09:57:19,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-12-22 09:57:19,431 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:57:19,431 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:57:19,431 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 09:57:19,432 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:57:19,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:57:19,432 INFO L82 PathProgramCache]: Analyzing trace with hash 2023924156, now seen corresponding path program 1 times [2020-12-22 09:57:19,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:57:19,432 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658829470] [2020-12-22 09:57:19,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:57:19,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:19,510 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:57:19,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658829470] [2020-12-22 09:57:19,511 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:57:19,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:57:19,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277059408] [2020-12-22 09:57:19,512 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:57:19,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:57:19,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:57:19,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:57:19,514 INFO L87 Difference]: Start difference. First operand 21401 states and 30831 transitions. Second operand 3 states. [2020-12-22 09:57:21,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:57:21,032 INFO L93 Difference]: Finished difference Result 34810 states and 50228 transitions. [2020-12-22 09:57:21,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:57:21,033 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 96 [2020-12-22 09:57:21,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:57:21,066 INFO L225 Difference]: With dead ends: 34810 [2020-12-22 09:57:21,067 INFO L226 Difference]: Without dead ends: 15704 [2020-12-22 09:57:21,091 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 09:57:21,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15704 states. [2020-12-22 09:57:21,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15704 to 15702. [2020-12-22 09:57:21,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15702 states. [2020-12-22 09:57:21,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15702 states to 15702 states and 22673 transitions. [2020-12-22 09:57:21,984 INFO L78 Accepts]: Start accepts. Automaton has 15702 states and 22673 transitions. Word has length 96 [2020-12-22 09:57:21,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:57:21,984 INFO L481 AbstractCegarLoop]: Abstraction has 15702 states and 22673 transitions. [2020-12-22 09:57:21,984 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:57:21,984 INFO L276 IsEmpty]: Start isEmpty. Operand 15702 states and 22673 transitions. [2020-12-22 09:57:21,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-12-22 09:57:21,988 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:57:21,989 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:57:21,989 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 09:57:21,989 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:57:21,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:57:21,990 INFO L82 PathProgramCache]: Analyzing trace with hash -1980328951, now seen corresponding path program 1 times [2020-12-22 09:57:21,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:57:21,990 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272213125] [2020-12-22 09:57:21,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:57:22,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:22,107 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 09:57:22,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272213125] [2020-12-22 09:57:22,108 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:57:22,108 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:57:22,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435485639] [2020-12-22 09:57:22,108 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:57:22,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:57:22,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:57:22,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:57:22,110 INFO L87 Difference]: Start difference. First operand 15702 states and 22673 transitions. Second operand 7 states. [2020-12-22 09:57:23,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:57:23,515 INFO L93 Difference]: Finished difference Result 27874 states and 40279 transitions. [2020-12-22 09:57:23,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:57:23,516 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 96 [2020-12-22 09:57:23,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:57:23,551 INFO L225 Difference]: With dead ends: 27874 [2020-12-22 09:57:23,552 INFO L226 Difference]: Without dead ends: 25440 [2020-12-22 09:57:23,564 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:57:23,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25440 states. [2020-12-22 09:57:24,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25440 to 18134. [2020-12-22 09:57:24,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18134 states. [2020-12-22 09:57:24,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18134 states to 18134 states and 26161 transitions. [2020-12-22 09:57:24,722 INFO L78 Accepts]: Start accepts. Automaton has 18134 states and 26161 transitions. Word has length 96 [2020-12-22 09:57:24,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:57:24,722 INFO L481 AbstractCegarLoop]: Abstraction has 18134 states and 26161 transitions. [2020-12-22 09:57:24,723 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:57:24,723 INFO L276 IsEmpty]: Start isEmpty. Operand 18134 states and 26161 transitions. [2020-12-22 09:57:24,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-22 09:57:24,729 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:57:24,729 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:57:24,729 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 09:57:24,729 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:57:24,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:57:24,730 INFO L82 PathProgramCache]: Analyzing trace with hash 28168523, now seen corresponding path program 1 times [2020-12-22 09:57:24,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:57:24,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683293374] [2020-12-22 09:57:24,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:57:24,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:24,798 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:57:24,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683293374] [2020-12-22 09:57:24,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:57:24,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:57:24,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838028470] [2020-12-22 09:57:24,799 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:57:24,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:57:24,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:57:24,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:57:24,801 INFO L87 Difference]: Start difference. First operand 18134 states and 26161 transitions. Second operand 3 states. [2020-12-22 09:57:25,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:57:25,690 INFO L93 Difference]: Finished difference Result 26042 states and 37499 transitions. [2020-12-22 09:57:25,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:57:25,691 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 97 [2020-12-22 09:57:25,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:57:25,706 INFO L225 Difference]: With dead ends: 26042 [2020-12-22 09:57:25,707 INFO L226 Difference]: Without dead ends: 10232 [2020-12-22 09:57:25,729 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 09:57:25,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10232 states. [2020-12-22 09:57:26,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10232 to 10230. [2020-12-22 09:57:26,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10230 states. [2020-12-22 09:57:26,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10230 states to 10230 states and 14721 transitions. [2020-12-22 09:57:26,411 INFO L78 Accepts]: Start accepts. Automaton has 10230 states and 14721 transitions. Word has length 97 [2020-12-22 09:57:26,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:57:26,411 INFO L481 AbstractCegarLoop]: Abstraction has 10230 states and 14721 transitions. [2020-12-22 09:57:26,411 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:57:26,411 INFO L276 IsEmpty]: Start isEmpty. Operand 10230 states and 14721 transitions. [2020-12-22 09:57:26,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-22 09:57:26,415 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:57:26,415 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:57:26,415 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 09:57:26,416 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:57:26,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:57:26,416 INFO L82 PathProgramCache]: Analyzing trace with hash -1887443071, now seen corresponding path program 1 times [2020-12-22 09:57:26,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:57:26,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932715426] [2020-12-22 09:57:26,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:57:26,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:26,504 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:57:26,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932715426] [2020-12-22 09:57:26,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:57:26,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:57:26,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484097711] [2020-12-22 09:57:26,506 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:57:26,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:57:26,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:57:26,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:57:26,507 INFO L87 Difference]: Start difference. First operand 10230 states and 14721 transitions. Second operand 3 states. [2020-12-22 09:57:26,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:57:26,956 INFO L93 Difference]: Finished difference Result 14186 states and 20339 transitions. [2020-12-22 09:57:26,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:57:26,957 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 97 [2020-12-22 09:57:26,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:57:26,967 INFO L225 Difference]: With dead ends: 14186 [2020-12-22 09:57:26,968 INFO L226 Difference]: Without dead ends: 6280 [2020-12-22 09:57:26,983 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 09:57:26,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6280 states. [2020-12-22 09:57:27,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6280 to 6278. [2020-12-22 09:57:27,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6278 states. [2020-12-22 09:57:27,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6278 states to 6278 states and 9053 transitions. [2020-12-22 09:57:27,369 INFO L78 Accepts]: Start accepts. Automaton has 6278 states and 9053 transitions. Word has length 97 [2020-12-22 09:57:27,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:57:27,369 INFO L481 AbstractCegarLoop]: Abstraction has 6278 states and 9053 transitions. [2020-12-22 09:57:27,369 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:57:27,369 INFO L276 IsEmpty]: Start isEmpty. Operand 6278 states and 9053 transitions. [2020-12-22 09:57:27,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-22 09:57:27,372 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:57:27,372 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:57:27,372 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 09:57:27,372 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:57:27,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:57:27,373 INFO L82 PathProgramCache]: Analyzing trace with hash -300840777, now seen corresponding path program 1 times [2020-12-22 09:57:27,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:57:27,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70584511] [2020-12-22 09:57:27,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:57:27,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:27,438 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:57:27,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70584511] [2020-12-22 09:57:27,439 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:57:27,439 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:57:27,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084050632] [2020-12-22 09:57:27,440 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:57:27,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:57:27,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:57:27,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:57:27,441 INFO L87 Difference]: Start difference. First operand 6278 states and 9053 transitions. Second operand 3 states. [2020-12-22 09:57:27,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:57:27,614 INFO L93 Difference]: Finished difference Result 8258 states and 11837 transitions. [2020-12-22 09:57:27,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:57:27,614 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 97 [2020-12-22 09:57:27,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:57:27,619 INFO L225 Difference]: With dead ends: 8258 [2020-12-22 09:57:27,619 INFO L226 Difference]: Without dead ends: 4304 [2020-12-22 09:57:27,623 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 09:57:27,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4304 states. [2020-12-22 09:57:27,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4304 to 4302. [2020-12-22 09:57:27,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4302 states. [2020-12-22 09:57:27,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4302 states to 4302 states and 6245 transitions. [2020-12-22 09:57:27,827 INFO L78 Accepts]: Start accepts. Automaton has 4302 states and 6245 transitions. Word has length 97 [2020-12-22 09:57:27,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:57:27,827 INFO L481 AbstractCegarLoop]: Abstraction has 4302 states and 6245 transitions. [2020-12-22 09:57:27,828 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:57:27,828 INFO L276 IsEmpty]: Start isEmpty. Operand 4302 states and 6245 transitions. [2020-12-22 09:57:27,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-22 09:57:27,829 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:57:27,829 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:57:27,829 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 09:57:27,829 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:57:27,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:57:27,830 INFO L82 PathProgramCache]: Analyzing trace with hash -387959571, now seen corresponding path program 1 times [2020-12-22 09:57:27,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:57:27,830 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039003486] [2020-12-22 09:57:27,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:57:27,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:28,201 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:57:28,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039003486] [2020-12-22 09:57:28,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471163734] [2020-12-22 09:57:28,202 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 09:57:28,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:28,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 09:57:28,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:57:28,899 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 09:57:28,900 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:57:28,900 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 4] total 16 [2020-12-22 09:57:28,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175308567] [2020-12-22 09:57:28,901 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 09:57:28,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:57:28,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 09:57:28,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2020-12-22 09:57:28,902 INFO L87 Difference]: Start difference. First operand 4302 states and 6245 transitions. Second operand 16 states. [2020-12-22 09:57:30,947 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2020-12-22 09:57:33,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:57:33,037 INFO L93 Difference]: Finished difference Result 15373 states and 21264 transitions. [2020-12-22 09:57:33,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-22 09:57:33,039 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 97 [2020-12-22 09:57:33,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:57:33,088 INFO L225 Difference]: With dead ends: 15373 [2020-12-22 09:57:33,089 INFO L226 Difference]: Without dead ends: 13395 [2020-12-22 09:57:33,098 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=491, Invalid=2161, Unknown=0, NotChecked=0, Total=2652 [2020-12-22 09:57:33,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13395 states. [2020-12-22 09:57:33,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13395 to 10024. [2020-12-22 09:57:33,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10024 states. [2020-12-22 09:57:33,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10024 states to 10024 states and 13807 transitions. [2020-12-22 09:57:33,846 INFO L78 Accepts]: Start accepts. Automaton has 10024 states and 13807 transitions. Word has length 97 [2020-12-22 09:57:33,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:57:33,846 INFO L481 AbstractCegarLoop]: Abstraction has 10024 states and 13807 transitions. [2020-12-22 09:57:33,846 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 09:57:33,846 INFO L276 IsEmpty]: Start isEmpty. Operand 10024 states and 13807 transitions. [2020-12-22 09:57:33,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-12-22 09:57:33,849 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:57:33,850 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, 1, 1, 1, 1, 1, 1, 1, 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 09:57:34,063 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-22 09:57:34,064 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:57:34,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:57:34,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1231715697, now seen corresponding path program 1 times [2020-12-22 09:57:34,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:57:34,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017686703] [2020-12-22 09:57:34,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:57:34,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:34,520 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:57:34,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017686703] [2020-12-22 09:57:34,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42017328] [2020-12-22 09:57:34,521 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 09:57:34,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:34,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 09:57:34,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:57:34,900 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:57:35,332 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:57:35,333 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:57:35,333 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 21 [2020-12-22 09:57:35,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334874258] [2020-12-22 09:57:35,334 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-22 09:57:35,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:57:35,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-22 09:57:35,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2020-12-22 09:57:35,338 INFO L87 Difference]: Start difference. First operand 10024 states and 13807 transitions. Second operand 22 states. [2020-12-22 09:57:37,747 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 47 [2020-12-22 09:57:40,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:57:40,523 INFO L93 Difference]: Finished difference Result 40825 states and 54873 transitions. [2020-12-22 09:57:40,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 09:57:40,524 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 98 [2020-12-22 09:57:40,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:57:40,629 INFO L225 Difference]: With dead ends: 40825 [2020-12-22 09:57:40,629 INFO L226 Difference]: Without dead ends: 34322 [2020-12-22 09:57:40,644 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=415, Invalid=1391, Unknown=0, NotChecked=0, Total=1806 [2020-12-22 09:57:40,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34322 states. [2020-12-22 09:57:42,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34322 to 22527. [2020-12-22 09:57:42,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22527 states. [2020-12-22 09:57:43,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22527 states to 22527 states and 30346 transitions. [2020-12-22 09:57:43,002 INFO L78 Accepts]: Start accepts. Automaton has 22527 states and 30346 transitions. Word has length 98 [2020-12-22 09:57:43,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:57:43,002 INFO L481 AbstractCegarLoop]: Abstraction has 22527 states and 30346 transitions. [2020-12-22 09:57:43,002 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-22 09:57:43,002 INFO L276 IsEmpty]: Start isEmpty. Operand 22527 states and 30346 transitions. [2020-12-22 09:57:43,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-12-22 09:57:43,005 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:57:43,005 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, 1, 1, 1, 1, 1, 1, 1, 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 09:57:43,218 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-22 09:57:43,219 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:57:43,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:57:43,220 INFO L82 PathProgramCache]: Analyzing trace with hash -1198087855, now seen corresponding path program 1 times [2020-12-22 09:57:43,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:57:43,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66226384] [2020-12-22 09:57:43,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:57:43,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:43,501 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:57:43,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66226384] [2020-12-22 09:57:43,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509021902] [2020-12-22 09:57:43,502 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 09:57:43,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:43,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 09:57:43,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:57:43,835 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:57:44,168 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:57:44,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:57:44,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 09:57:44,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530575848] [2020-12-22 09:57:44,170 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 09:57:44,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:57:44,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 09:57:44,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:57:44,171 INFO L87 Difference]: Start difference. First operand 22527 states and 30346 transitions. Second operand 17 states. [2020-12-22 09:57:47,009 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2020-12-22 09:57:48,102 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-12-22 09:57:52,767 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-12-22 09:58:11,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:58:11,458 INFO L93 Difference]: Finished difference Result 217082 states and 288156 transitions. [2020-12-22 09:58:11,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2020-12-22 09:58:11,459 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 98 [2020-12-22 09:58:11,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:58:11,820 INFO L225 Difference]: With dead ends: 217082 [2020-12-22 09:58:11,820 INFO L226 Difference]: Without dead ends: 197525 [2020-12-22 09:58:11,919 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2540 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=1236, Invalid=6596, Unknown=0, NotChecked=0, Total=7832 [2020-12-22 09:58:12,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197525 states. [2020-12-22 09:58:25,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197525 to 112800. [2020-12-22 09:58:25,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112800 states. [2020-12-22 09:58:25,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112800 states to 112800 states and 147729 transitions. [2020-12-22 09:58:25,680 INFO L78 Accepts]: Start accepts. Automaton has 112800 states and 147729 transitions. Word has length 98 [2020-12-22 09:58:25,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:58:25,680 INFO L481 AbstractCegarLoop]: Abstraction has 112800 states and 147729 transitions. [2020-12-22 09:58:25,681 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 09:58:25,681 INFO L276 IsEmpty]: Start isEmpty. Operand 112800 states and 147729 transitions. [2020-12-22 09:58:25,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-12-22 09:58:25,684 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:58:25,684 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, 1, 1, 1, 1, 1, 1, 1, 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 09:58:25,884 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-22 09:58:25,886 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:58:25,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:58:25,887 INFO L82 PathProgramCache]: Analyzing trace with hash 2130421773, now seen corresponding path program 1 times [2020-12-22 09:58:25,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:58:25,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793315819] [2020-12-22 09:58:25,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:58:25,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:58:26,010 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 09:58:26,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793315819] [2020-12-22 09:58:26,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:58:26,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:58:26,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979558169] [2020-12-22 09:58:26,012 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:58:26,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:58:26,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:58:26,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:58:26,012 INFO L87 Difference]: Start difference. First operand 112800 states and 147729 transitions. Second operand 6 states. [2020-12-22 09:58:37,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:58:37,213 INFO L93 Difference]: Finished difference Result 213245 states and 279510 transitions. [2020-12-22 09:58:37,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:58:37,213 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 98 [2020-12-22 09:58:37,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:58:37,391 INFO L225 Difference]: With dead ends: 213245 [2020-12-22 09:58:37,391 INFO L226 Difference]: Without dead ends: 102941 [2020-12-22 09:58:37,719 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 09:58:37,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102941 states. [2020-12-22 09:58:48,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102941 to 102941. [2020-12-22 09:58:48,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102941 states. [2020-12-22 09:58:49,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102941 states to 102941 states and 133968 transitions. [2020-12-22 09:58:49,080 INFO L78 Accepts]: Start accepts. Automaton has 102941 states and 133968 transitions. Word has length 98 [2020-12-22 09:58:49,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:58:49,080 INFO L481 AbstractCegarLoop]: Abstraction has 102941 states and 133968 transitions. [2020-12-22 09:58:49,080 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:58:49,080 INFO L276 IsEmpty]: Start isEmpty. Operand 102941 states and 133968 transitions. [2020-12-22 09:58:49,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-12-22 09:58:49,083 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:58:49,083 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, 1, 1, 1, 1, 1, 1, 1, 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 09:58:49,084 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-12-22 09:58:49,084 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:58:49,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:58:49,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1745709901, now seen corresponding path program 1 times [2020-12-22 09:58:49,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:58:49,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848427222] [2020-12-22 09:58:49,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:58:49,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:58:49,191 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 09:58:49,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848427222] [2020-12-22 09:58:49,191 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:58:49,192 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:58:49,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624345721] [2020-12-22 09:58:49,192 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:58:49,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:58:49,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:58:49,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:58:49,193 INFO L87 Difference]: Start difference. First operand 102941 states and 133968 transitions. Second operand 6 states. [2020-12-22 09:58:58,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:58:58,091 INFO L93 Difference]: Finished difference Result 176479 states and 229419 transitions. [2020-12-22 09:58:58,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:58:58,092 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 98 [2020-12-22 09:58:58,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:58:58,187 INFO L225 Difference]: With dead ends: 176479 [2020-12-22 09:58:58,187 INFO L226 Difference]: Without dead ends: 76200 [2020-12-22 09:58:58,244 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 09:58:58,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76200 states. [2020-12-22 09:59:06,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76200 to 76200. [2020-12-22 09:59:06,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76200 states. [2020-12-22 09:59:07,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76200 states to 76200 states and 97896 transitions. [2020-12-22 09:59:07,063 INFO L78 Accepts]: Start accepts. Automaton has 76200 states and 97896 transitions. Word has length 98 [2020-12-22 09:59:07,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:59:07,063 INFO L481 AbstractCegarLoop]: Abstraction has 76200 states and 97896 transitions. [2020-12-22 09:59:07,063 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:59:07,063 INFO L276 IsEmpty]: Start isEmpty. Operand 76200 states and 97896 transitions. [2020-12-22 09:59:07,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-12-22 09:59:07,066 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:59:07,066 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, 1, 1, 1, 1, 1, 1, 1, 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 09:59:07,066 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-12-22 09:59:07,066 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:59:07,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:59:07,067 INFO L82 PathProgramCache]: Analyzing trace with hash -1530628851, now seen corresponding path program 1 times [2020-12-22 09:59:07,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:59:07,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902337979] [2020-12-22 09:59:07,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:59:07,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:59:07,149 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-12-22 09:59:07,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902337979] [2020-12-22 09:59:07,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:59:07,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:59:07,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855014415] [2020-12-22 09:59:07,151 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:59:07,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:59:07,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:59:07,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:59:07,151 INFO L87 Difference]: Start difference. First operand 76200 states and 97896 transitions. Second operand 6 states. [2020-12-22 09:59:14,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:59:14,403 INFO L93 Difference]: Finished difference Result 131990 states and 169560 transitions. [2020-12-22 09:59:14,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:59:14,404 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 98 [2020-12-22 09:59:14,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:59:14,470 INFO L225 Difference]: With dead ends: 131990 [2020-12-22 09:59:14,470 INFO L226 Difference]: Without dead ends: 58170 [2020-12-22 09:59:14,502 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 09:59:14,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58170 states. [2020-12-22 09:59:21,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58170 to 58170. [2020-12-22 09:59:21,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58170 states. [2020-12-22 09:59:21,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58170 states to 58170 states and 74590 transitions. [2020-12-22 09:59:21,132 INFO L78 Accepts]: Start accepts. Automaton has 58170 states and 74590 transitions. Word has length 98 [2020-12-22 09:59:21,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:59:21,132 INFO L481 AbstractCegarLoop]: Abstraction has 58170 states and 74590 transitions. [2020-12-22 09:59:21,132 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:59:21,133 INFO L276 IsEmpty]: Start isEmpty. Operand 58170 states and 74590 transitions. [2020-12-22 09:59:21,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-12-22 09:59:21,135 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:59:21,135 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, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:59:21,135 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-12-22 09:59:21,136 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:59:21,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:59:21,136 INFO L82 PathProgramCache]: Analyzing trace with hash -328972562, now seen corresponding path program 1 times [2020-12-22 09:59:21,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:59:21,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919539932] [2020-12-22 09:59:21,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:59:21,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:59:21,215 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-22 09:59:21,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919539932] [2020-12-22 09:59:21,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:59:21,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:59:21,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197848122] [2020-12-22 09:59:21,216 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:59:21,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:59:21,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:59:21,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:59:21,217 INFO L87 Difference]: Start difference. First operand 58170 states and 74590 transitions. Second operand 6 states. [2020-12-22 09:59:27,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:59:27,083 INFO L93 Difference]: Finished difference Result 101224 states and 129493 transitions. [2020-12-22 09:59:27,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:59:27,084 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 99 [2020-12-22 09:59:27,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:59:27,133 INFO L225 Difference]: With dead ends: 101224 [2020-12-22 09:59:27,133 INFO L226 Difference]: Without dead ends: 45436 [2020-12-22 09:59:27,162 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 09:59:27,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45436 states. [2020-12-22 09:59:32,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45436 to 45436. [2020-12-22 09:59:32,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45436 states. [2020-12-22 09:59:32,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45436 states to 45436 states and 57833 transitions. [2020-12-22 09:59:32,765 INFO L78 Accepts]: Start accepts. Automaton has 45436 states and 57833 transitions. Word has length 99 [2020-12-22 09:59:32,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:59:32,765 INFO L481 AbstractCegarLoop]: Abstraction has 45436 states and 57833 transitions. [2020-12-22 09:59:32,765 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:59:32,765 INFO L276 IsEmpty]: Start isEmpty. Operand 45436 states and 57833 transitions. [2020-12-22 09:59:32,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-12-22 09:59:32,768 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:59:32,768 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:59:32,768 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-12-22 09:59:32,768 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:59:32,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:59:32,769 INFO L82 PathProgramCache]: Analyzing trace with hash -1888515992, now seen corresponding path program 1 times [2020-12-22 09:59:32,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:59:32,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293861836] [2020-12-22 09:59:32,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:59:32,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:59:33,030 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:59:33,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293861836] [2020-12-22 09:59:33,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595689035] [2020-12-22 09:59:33,031 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 09:59:33,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:59:33,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-22 09:59:33,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:59:33,523 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:59:33,811 WARN L197 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 43 [2020-12-22 09:59:34,462 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:59:34,463 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:59:34,463 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 20 [2020-12-22 09:59:34,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223319730] [2020-12-22 09:59:34,463 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-22 09:59:34,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:59:34,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-22 09:59:34,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2020-12-22 09:59:34,464 INFO L87 Difference]: Start difference. First operand 45436 states and 57833 transitions. Second operand 20 states. [2020-12-22 09:59:35,447 WARN L197 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 89 [2020-12-22 09:59:35,929 WARN L197 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 95 [2020-12-22 09:59:36,706 WARN L197 SmtUtils]: Spent 689.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 110 [2020-12-22 09:59:37,524 WARN L197 SmtUtils]: Spent 768.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 116 [2020-12-22 09:59:38,319 WARN L197 SmtUtils]: Spent 747.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 113 [2020-12-22 09:59:39,096 WARN L197 SmtUtils]: Spent 624.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 113 [2020-12-22 09:59:39,872 WARN L197 SmtUtils]: Spent 493.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 105 [2020-12-22 09:59:40,402 WARN L197 SmtUtils]: Spent 450.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 102 [2020-12-22 09:59:41,093 WARN L197 SmtUtils]: Spent 487.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 114 [2020-12-22 09:59:41,768 WARN L197 SmtUtils]: Spent 575.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 111 [2020-12-22 09:59:42,714 WARN L197 SmtUtils]: Spent 690.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 122 [2020-12-22 09:59:43,441 WARN L197 SmtUtils]: Spent 646.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 119 [2020-12-22 09:59:44,403 WARN L197 SmtUtils]: Spent 558.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 114 [2020-12-22 09:59:45,259 WARN L197 SmtUtils]: Spent 589.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 105 [2020-12-22 09:59:46,011 WARN L197 SmtUtils]: Spent 669.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 122 [2020-12-22 09:59:47,224 WARN L197 SmtUtils]: Spent 825.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 113 [2020-12-22 09:59:51,240 WARN L197 SmtUtils]: Spent 837.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 125 [2020-12-22 09:59:52,384 WARN L197 SmtUtils]: Spent 889.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 128 [2020-12-22 09:59:53,368 WARN L197 SmtUtils]: Spent 849.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 116 [2020-12-22 09:59:53,964 WARN L197 SmtUtils]: Spent 441.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2020-12-22 09:59:55,042 WARN L197 SmtUtils]: Spent 866.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 119 [2020-12-22 09:59:55,566 WARN L197 SmtUtils]: Spent 440.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 84 [2020-12-22 09:59:56,211 WARN L197 SmtUtils]: Spent 473.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 72 [2020-12-22 09:59:56,784 WARN L197 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-12-22 09:59:57,526 WARN L197 SmtUtils]: Spent 467.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 78 [2020-12-22 09:59:57,926 WARN L197 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-12-22 09:59:58,872 WARN L197 SmtUtils]: Spent 822.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 119 [2020-12-22 09:59:59,720 WARN L197 SmtUtils]: Spent 769.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 116 [2020-12-22 10:00:00,386 WARN L197 SmtUtils]: Spent 558.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 81 [2020-12-22 10:00:00,933 WARN L197 SmtUtils]: Spent 417.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2020-12-22 10:00:02,441 WARN L197 SmtUtils]: Spent 443.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-12-22 10:00:03,017 WARN L197 SmtUtils]: Spent 427.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 72 [2020-12-22 10:00:04,231 WARN L197 SmtUtils]: Spent 1.10 s on a formula simplification. DAG size of input: 121 DAG size of output: 116 [2020-12-22 10:00:04,825 WARN L197 SmtUtils]: Spent 508.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2020-12-22 10:00:05,421 WARN L197 SmtUtils]: Spent 498.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-12-22 10:00:09,783 WARN L197 SmtUtils]: Spent 1.22 s on a formula simplification. DAG size of input: 110 DAG size of output: 108 [2020-12-22 10:00:11,941 WARN L197 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 119 DAG size of output: 117 [2020-12-22 10:00:13,178 WARN L197 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 130 DAG size of output: 125 [2020-12-22 10:00:13,885 WARN L197 SmtUtils]: Spent 598.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 84 [2020-12-22 10:00:14,540 WARN L197 SmtUtils]: Spent 541.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2020-12-22 10:00:15,583 WARN L197 SmtUtils]: Spent 620.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 87 [2020-12-22 10:00:16,302 WARN L197 SmtUtils]: Spent 634.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 84 [2020-12-22 10:00:16,968 WARN L197 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-12-22 10:00:17,350 WARN L197 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-12-22 10:00:17,976 WARN L197 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2020-12-22 10:00:18,328 WARN L197 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 80