/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.7.1.ufo.BOUNDED-14.pals+Problem12_label02.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 10:10:32,186 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 10:10:32,189 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 10:10:32,246 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 10:10:32,247 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 10:10:32,252 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 10:10:32,256 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 10:10:32,265 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 10:10:32,268 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 10:10:32,274 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 10:10:32,276 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 10:10:32,277 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 10:10:32,277 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 10:10:32,281 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 10:10:32,283 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 10:10:32,285 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 10:10:32,286 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 10:10:32,291 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 10:10:32,307 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 10:10:32,316 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 10:10:32,319 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 10:10:32,321 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 10:10:32,323 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 10:10:32,325 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 10:10:32,335 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 10:10:32,346 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 10:10:32,347 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 10:10:32,348 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 10:10:32,349 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 10:10:32,409 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 10:10:32,409 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 10:10:32,414 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 10:10:32,414 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 10:10:32,415 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 10:10:32,415 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 10:10:32,415 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 10:10:32,415 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 10:10:32,416 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 10:10:32,416 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 10:10:32,418 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 10:10:32,418 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 10:10:32,418 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 10:10:32,418 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 10:10:32,419 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 10:10:32,419 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 10:10:32,419 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 10:10:32,419 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 10:10:32,420 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 10:10:32,420 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 10:10:32,421 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 10:10:32,421 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 10:10:32,421 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 10:10:32,421 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 10:10:32,422 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 10:10:32,422 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 10:10:32,834 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 10:10:32,862 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 10:10:32,865 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 10:10:32,866 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 10:10:32,869 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 10:10:32,870 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.7.1.ufo.BOUNDED-14.pals+Problem12_label02.c [2020-12-22 10:10:32,966 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9b3112405/8e35912f81034b45980bf0c2ac59d027/FLAG9bc01ee6a [2020-12-22 10:10:34,025 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 10:10:34,026 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.7.1.ufo.BOUNDED-14.pals+Problem12_label02.c [2020-12-22 10:10:34,074 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9b3112405/8e35912f81034b45980bf0c2ac59d027/FLAG9bc01ee6a [2020-12-22 10:10:34,419 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9b3112405/8e35912f81034b45980bf0c2ac59d027 [2020-12-22 10:10:34,422 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 10:10:34,425 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 10:10:34,429 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 10:10:34,429 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 10:10:34,433 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 10:10:34,434 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:10:34" (1/1) ... [2020-12-22 10:10:34,436 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76adc569 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:10:34, skipping insertion in model container [2020-12-22 10:10:34,436 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:10:34" (1/1) ... [2020-12-22 10:10:34,445 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 10:10:34,647 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 10:10:35,223 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.7.1.ufo.BOUNDED-14.pals+Problem12_label02.c[20581,20594] [2020-12-22 10:10:35,325 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.7.1.ufo.BOUNDED-14.pals+Problem12_label02.c[27628,27641] [2020-12-22 10:10:36,316 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:10:36,328 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 10:10:36,371 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.7.1.ufo.BOUNDED-14.pals+Problem12_label02.c[20581,20594] [2020-12-22 10:10:36,435 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.7.1.ufo.BOUNDED-14.pals+Problem12_label02.c[27628,27641] [2020-12-22 10:10:37,070 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:10:37,120 INFO L208 MainTranslator]: Completed translation [2020-12-22 10:10:37,121 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:10:37 WrapperNode [2020-12-22 10:10:37,122 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 10:10:37,123 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 10:10:37,123 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 10:10:37,123 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 10:10:37,135 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:10:37" (1/1) ... [2020-12-22 10:10:37,225 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:10:37" (1/1) ... [2020-12-22 10:10:37,633 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 10:10:37,634 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 10:10:37,635 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 10:10:37,635 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 10:10:37,644 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:10:37" (1/1) ... [2020-12-22 10:10:37,645 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:10:37" (1/1) ... [2020-12-22 10:10:37,814 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:10:37" (1/1) ... [2020-12-22 10:10:37,815 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:10:37" (1/1) ... [2020-12-22 10:10:38,018 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:10:37" (1/1) ... [2020-12-22 10:10:38,064 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:10:37" (1/1) ... [2020-12-22 10:10:38,118 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:10:37" (1/1) ... [2020-12-22 10:10:38,264 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 10:10:38,265 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 10:10:38,265 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 10:10:38,266 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 10:10:38,266 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:10:37" (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 10:10:38,380 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 10:10:38,380 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 10:10:38,381 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 10:10:38,381 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 10:10:43,614 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 10:10:43,614 INFO L299 CfgBuilder]: Removed 40 assume(true) statements. [2020-12-22 10:10:43,618 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:10:43 BoogieIcfgContainer [2020-12-22 10:10:43,618 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 10:10:43,620 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 10:10:43,620 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 10:10:43,623 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 10:10:43,624 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 10:10:34" (1/3) ... [2020-12-22 10:10:43,625 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f570578 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:10:43, skipping insertion in model container [2020-12-22 10:10:43,625 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:10:37" (2/3) ... [2020-12-22 10:10:43,625 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f570578 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:10:43, skipping insertion in model container [2020-12-22 10:10:43,625 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:10:43" (3/3) ... [2020-12-22 10:10:43,627 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.7.1.ufo.BOUNDED-14.pals+Problem12_label02.c [2020-12-22 10:10:43,633 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 10:10:43,639 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 10:10:43,657 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 10:10:43,691 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 10:10:43,692 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 10:10:43,692 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 10:10:43,692 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 10:10:43,692 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 10:10:43,692 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 10:10:43,692 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 10:10:43,693 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 10:10:43,727 INFO L276 IsEmpty]: Start isEmpty. Operand 944 states. [2020-12-22 10:10:43,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-22 10:10:43,737 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:10:43,738 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:10:43,738 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:10:43,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:10:43,745 INFO L82 PathProgramCache]: Analyzing trace with hash 720070723, now seen corresponding path program 1 times [2020-12-22 10:10:43,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:10:43,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106276000] [2020-12-22 10:10:43,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:10:43,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:10:44,065 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 10:10:44,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106276000] [2020-12-22 10:10:44,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:10:44,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 10:10:44,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749000833] [2020-12-22 10:10:44,073 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 10:10:44,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:10:44,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 10:10:44,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 10:10:44,095 INFO L87 Difference]: Start difference. First operand 944 states. Second operand 2 states. [2020-12-22 10:10:44,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:10:44,195 INFO L93 Difference]: Finished difference Result 1832 states and 3464 transitions. [2020-12-22 10:10:44,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 10:10:44,197 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 42 [2020-12-22 10:10:44,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:10:44,228 INFO L225 Difference]: With dead ends: 1832 [2020-12-22 10:10:44,228 INFO L226 Difference]: Without dead ends: 878 [2020-12-22 10:10:44,238 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 10:10:44,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 878 states. [2020-12-22 10:10:44,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 878 to 878. [2020-12-22 10:10:44,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 878 states. [2020-12-22 10:10:44,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 878 states to 878 states and 1653 transitions. [2020-12-22 10:10:44,395 INFO L78 Accepts]: Start accepts. Automaton has 878 states and 1653 transitions. Word has length 42 [2020-12-22 10:10:44,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:10:44,396 INFO L481 AbstractCegarLoop]: Abstraction has 878 states and 1653 transitions. [2020-12-22 10:10:44,396 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 10:10:44,396 INFO L276 IsEmpty]: Start isEmpty. Operand 878 states and 1653 transitions. [2020-12-22 10:10:44,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-22 10:10:44,400 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:10:44,400 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:10:44,400 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 10:10:44,401 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:10:44,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:10:44,403 INFO L82 PathProgramCache]: Analyzing trace with hash 325703937, now seen corresponding path program 1 times [2020-12-22 10:10:44,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:10:44,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394887828] [2020-12-22 10:10:44,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:10:44,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:10:44,590 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 10:10:44,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394887828] [2020-12-22 10:10:44,592 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:10:44,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:10:44,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909978916] [2020-12-22 10:10:44,594 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 10:10:44,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:10:44,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 10:10:44,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 10:10:44,596 INFO L87 Difference]: Start difference. First operand 878 states and 1653 transitions. Second operand 5 states. [2020-12-22 10:10:44,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:10:44,843 INFO L93 Difference]: Finished difference Result 950 states and 1765 transitions. [2020-12-22 10:10:44,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 10:10:44,844 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 42 [2020-12-22 10:10:44,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:10:44,849 INFO L225 Difference]: With dead ends: 950 [2020-12-22 10:10:44,850 INFO L226 Difference]: Without dead ends: 878 [2020-12-22 10:10:44,851 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 10:10:44,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 878 states. [2020-12-22 10:10:44,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 878 to 878. [2020-12-22 10:10:44,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 878 states. [2020-12-22 10:10:44,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 878 states to 878 states and 1603 transitions. [2020-12-22 10:10:44,876 INFO L78 Accepts]: Start accepts. Automaton has 878 states and 1603 transitions. Word has length 42 [2020-12-22 10:10:44,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:10:44,877 INFO L481 AbstractCegarLoop]: Abstraction has 878 states and 1603 transitions. [2020-12-22 10:10:44,877 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 10:10:44,877 INFO L276 IsEmpty]: Start isEmpty. Operand 878 states and 1603 transitions. [2020-12-22 10:10:44,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 10:10:44,879 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:10:44,879 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 10:10:44,880 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 10:10:44,880 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:10:44,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:10:44,881 INFO L82 PathProgramCache]: Analyzing trace with hash -1873981919, now seen corresponding path program 1 times [2020-12-22 10:10:44,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:10:44,881 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985324759] [2020-12-22 10:10:44,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:10:44,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:10:45,150 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 10:10:45,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985324759] [2020-12-22 10:10:45,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:10:45,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:10:45,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379117951] [2020-12-22 10:10:45,153 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 10:10:45,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:10:45,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 10:10:45,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 10:10:45,158 INFO L87 Difference]: Start difference. First operand 878 states and 1603 transitions. Second operand 4 states. [2020-12-22 10:10:56,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:10:56,595 INFO L93 Difference]: Finished difference Result 3133 states and 5912 transitions. [2020-12-22 10:10:56,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 10:10:56,596 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 63 [2020-12-22 10:10:56,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:10:56,610 INFO L225 Difference]: With dead ends: 3133 [2020-12-22 10:10:56,610 INFO L226 Difference]: Without dead ends: 2380 [2020-12-22 10:10:56,612 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 10:10:56,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2380 states. [2020-12-22 10:10:56,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2380 to 2380. [2020-12-22 10:10:56,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2380 states. [2020-12-22 10:10:56,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2380 states to 2380 states and 3717 transitions. [2020-12-22 10:10:56,677 INFO L78 Accepts]: Start accepts. Automaton has 2380 states and 3717 transitions. Word has length 63 [2020-12-22 10:10:56,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:10:56,678 INFO L481 AbstractCegarLoop]: Abstraction has 2380 states and 3717 transitions. [2020-12-22 10:10:56,678 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 10:10:56,678 INFO L276 IsEmpty]: Start isEmpty. Operand 2380 states and 3717 transitions. [2020-12-22 10:10:56,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:10:56,682 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:10:56,683 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, 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 10:10:56,683 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 10:10:56,683 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:10:56,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:10:56,684 INFO L82 PathProgramCache]: Analyzing trace with hash 1207745120, now seen corresponding path program 1 times [2020-12-22 10:10:56,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:10:56,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447892074] [2020-12-22 10:10:56,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:10:56,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:10:56,792 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 10:10:56,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447892074] [2020-12-22 10:10:56,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:10:56,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:10:56,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633781751] [2020-12-22 10:10:56,794 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:10:56,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:10:56,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:10:56,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:10:56,795 INFO L87 Difference]: Start difference. First operand 2380 states and 3717 transitions. Second operand 3 states. [2020-12-22 10:10:56,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:10:56,844 INFO L93 Difference]: Finished difference Result 2510 states and 3923 transitions. [2020-12-22 10:10:56,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:10:56,845 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 10:10:56,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:10:56,860 INFO L225 Difference]: With dead ends: 2510 [2020-12-22 10:10:56,861 INFO L226 Difference]: Without dead ends: 2442 [2020-12-22 10:10:56,862 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 10:10:56,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2442 states. [2020-12-22 10:10:56,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2442 to 2440. [2020-12-22 10:10:56,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2440 states. [2020-12-22 10:10:56,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2440 states to 2440 states and 3813 transitions. [2020-12-22 10:10:56,923 INFO L78 Accepts]: Start accepts. Automaton has 2440 states and 3813 transitions. Word has length 91 [2020-12-22 10:10:56,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:10:56,924 INFO L481 AbstractCegarLoop]: Abstraction has 2440 states and 3813 transitions. [2020-12-22 10:10:56,924 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:10:56,924 INFO L276 IsEmpty]: Start isEmpty. Operand 2440 states and 3813 transitions. [2020-12-22 10:10:56,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:10:56,927 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:10:56,927 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, 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 10:10:56,927 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 10:10:56,928 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:10:56,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:10:56,928 INFO L82 PathProgramCache]: Analyzing trace with hash -1564953708, now seen corresponding path program 1 times [2020-12-22 10:10:56,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:10:56,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529490735] [2020-12-22 10:10:56,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:10:56,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:10:57,048 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 10:10:57,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529490735] [2020-12-22 10:10:57,049 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:10:57,049 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:10:57,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618295085] [2020-12-22 10:10:57,050 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:10:57,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:10:57,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:10:57,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:10:57,051 INFO L87 Difference]: Start difference. First operand 2440 states and 3813 transitions. Second operand 3 states. [2020-12-22 10:10:57,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:10:57,111 INFO L93 Difference]: Finished difference Result 2684 states and 4201 transitions. [2020-12-22 10:10:57,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:10:57,112 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 10:10:57,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:10:57,128 INFO L225 Difference]: With dead ends: 2684 [2020-12-22 10:10:57,128 INFO L226 Difference]: Without dead ends: 2556 [2020-12-22 10:10:57,130 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 10:10:57,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2556 states. [2020-12-22 10:10:57,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2556 to 2554. [2020-12-22 10:10:57,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2554 states. [2020-12-22 10:10:57,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2554 states to 2554 states and 3994 transitions. [2020-12-22 10:10:57,199 INFO L78 Accepts]: Start accepts. Automaton has 2554 states and 3994 transitions. Word has length 91 [2020-12-22 10:10:57,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:10:57,202 INFO L481 AbstractCegarLoop]: Abstraction has 2554 states and 3994 transitions. [2020-12-22 10:10:57,202 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:10:57,202 INFO L276 IsEmpty]: Start isEmpty. Operand 2554 states and 3994 transitions. [2020-12-22 10:10:57,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:10:57,204 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:10:57,204 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, 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 10:10:57,204 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 10:10:57,205 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:10:57,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:10:57,205 INFO L82 PathProgramCache]: Analyzing trace with hash 1479108296, now seen corresponding path program 1 times [2020-12-22 10:10:57,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:10:57,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709338495] [2020-12-22 10:10:57,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:10:57,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:10:57,373 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 10:10:57,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709338495] [2020-12-22 10:10:57,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:10:57,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:10:57,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556004685] [2020-12-22 10:10:57,375 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:10:57,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:10:57,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:10:57,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:10:57,378 INFO L87 Difference]: Start difference. First operand 2554 states and 3994 transitions. Second operand 3 states. [2020-12-22 10:10:57,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:10:57,462 INFO L93 Difference]: Finished difference Result 3014 states and 4724 transitions. [2020-12-22 10:10:57,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:10:57,463 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 10:10:57,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:10:57,488 INFO L225 Difference]: With dead ends: 3014 [2020-12-22 10:10:57,488 INFO L226 Difference]: Without dead ends: 2772 [2020-12-22 10:10:57,490 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 10:10:57,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2772 states. [2020-12-22 10:10:57,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2772 to 2770. [2020-12-22 10:10:57,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2770 states. [2020-12-22 10:10:57,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2770 states to 2770 states and 4334 transitions. [2020-12-22 10:10:57,589 INFO L78 Accepts]: Start accepts. Automaton has 2770 states and 4334 transitions. Word has length 91 [2020-12-22 10:10:57,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:10:57,590 INFO L481 AbstractCegarLoop]: Abstraction has 2770 states and 4334 transitions. [2020-12-22 10:10:57,591 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:10:57,591 INFO L276 IsEmpty]: Start isEmpty. Operand 2770 states and 4334 transitions. [2020-12-22 10:10:57,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:10:57,592 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:10:57,592 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, 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 10:10:57,593 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 10:10:57,595 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:10:57,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:10:57,599 INFO L82 PathProgramCache]: Analyzing trace with hash 733525566, now seen corresponding path program 1 times [2020-12-22 10:10:57,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:10:57,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697639525] [2020-12-22 10:10:57,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:10:57,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:10:57,735 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 10:10:57,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697639525] [2020-12-22 10:10:57,737 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:10:57,737 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:10:57,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244703242] [2020-12-22 10:10:57,738 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:10:57,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:10:57,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:10:57,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:10:57,739 INFO L87 Difference]: Start difference. First operand 2770 states and 4334 transitions. Second operand 3 states. [2020-12-22 10:10:57,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:10:57,806 INFO L93 Difference]: Finished difference Result 3638 states and 5704 transitions. [2020-12-22 10:10:57,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:10:57,808 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 10:10:57,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:10:57,824 INFO L225 Difference]: With dead ends: 3638 [2020-12-22 10:10:57,825 INFO L226 Difference]: Without dead ends: 3180 [2020-12-22 10:10:57,833 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 10:10:57,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3180 states. [2020-12-22 10:10:57,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3180 to 3178. [2020-12-22 10:10:57,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3178 states. [2020-12-22 10:10:57,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3178 states to 3178 states and 4970 transitions. [2020-12-22 10:10:57,927 INFO L78 Accepts]: Start accepts. Automaton has 3178 states and 4970 transitions. Word has length 91 [2020-12-22 10:10:57,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:10:57,928 INFO L481 AbstractCegarLoop]: Abstraction has 3178 states and 4970 transitions. [2020-12-22 10:10:57,928 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:10:57,929 INFO L276 IsEmpty]: Start isEmpty. Operand 3178 states and 4970 transitions. [2020-12-22 10:10:57,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:10:57,930 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:10:57,930 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, 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 10:10:57,930 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 10:10:57,930 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:10:57,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:10:57,931 INFO L82 PathProgramCache]: Analyzing trace with hash -1206505292, now seen corresponding path program 1 times [2020-12-22 10:10:57,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:10:57,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167383733] [2020-12-22 10:10:57,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:10:57,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:10:58,014 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 10:10:58,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167383733] [2020-12-22 10:10:58,015 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:10:58,015 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:10:58,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684578216] [2020-12-22 10:10:58,016 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:10:58,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:10:58,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:10:58,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:10:58,017 INFO L87 Difference]: Start difference. First operand 3178 states and 4970 transitions. Second operand 3 states. [2020-12-22 10:10:58,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:10:58,127 INFO L93 Difference]: Finished difference Result 4814 states and 7532 transitions. [2020-12-22 10:10:58,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:10:58,128 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 10:10:58,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:10:58,149 INFO L225 Difference]: With dead ends: 4814 [2020-12-22 10:10:58,150 INFO L226 Difference]: Without dead ends: 3948 [2020-12-22 10:10:58,153 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 10:10:58,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3948 states. [2020-12-22 10:10:58,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3948 to 3946. [2020-12-22 10:10:58,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3946 states. [2020-12-22 10:10:58,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3946 states to 3946 states and 6154 transitions. [2020-12-22 10:10:58,411 INFO L78 Accepts]: Start accepts. Automaton has 3946 states and 6154 transitions. Word has length 91 [2020-12-22 10:10:58,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:10:58,411 INFO L481 AbstractCegarLoop]: Abstraction has 3946 states and 6154 transitions. [2020-12-22 10:10:58,411 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:10:58,412 INFO L276 IsEmpty]: Start isEmpty. Operand 3946 states and 6154 transitions. [2020-12-22 10:10:58,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:10:58,413 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:10:58,413 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, 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 10:10:58,413 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 10:10:58,413 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:10:58,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:10:58,414 INFO L82 PathProgramCache]: Analyzing trace with hash 1494177322, now seen corresponding path program 1 times [2020-12-22 10:10:58,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:10:58,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528608690] [2020-12-22 10:10:58,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:10:58,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:10:58,600 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 10:10:58,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528608690] [2020-12-22 10:10:58,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:10:58,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:10:58,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787800670] [2020-12-22 10:10:58,602 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:10:58,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:10:58,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:10:58,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:10:58,603 INFO L87 Difference]: Start difference. First operand 3946 states and 6154 transitions. Second operand 9 states. [2020-12-22 10:10:59,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:10:59,934 INFO L93 Difference]: Finished difference Result 26822 states and 41784 transitions. [2020-12-22 10:10:59,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 10:10:59,935 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 91 [2020-12-22 10:10:59,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:11:00,032 INFO L225 Difference]: With dead ends: 26822 [2020-12-22 10:11:00,033 INFO L226 Difference]: Without dead ends: 25188 [2020-12-22 10:11:00,046 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2020-12-22 10:11:00,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25188 states. [2020-12-22 10:11:00,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25188 to 5578. [2020-12-22 10:11:00,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5578 states. [2020-12-22 10:11:00,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5578 states to 5578 states and 8634 transitions. [2020-12-22 10:11:00,627 INFO L78 Accepts]: Start accepts. Automaton has 5578 states and 8634 transitions. Word has length 91 [2020-12-22 10:11:00,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:11:00,627 INFO L481 AbstractCegarLoop]: Abstraction has 5578 states and 8634 transitions. [2020-12-22 10:11:00,627 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:11:00,627 INFO L276 IsEmpty]: Start isEmpty. Operand 5578 states and 8634 transitions. [2020-12-22 10:11:00,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 10:11:00,628 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:11:00,629 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, 1, 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 10:11:00,629 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 10:11:00,629 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:11:00,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:11:00,629 INFO L82 PathProgramCache]: Analyzing trace with hash -30360326, now seen corresponding path program 1 times [2020-12-22 10:11:00,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:11:00,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940873478] [2020-12-22 10:11:00,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:11:00,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:11:00,706 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 10:11:00,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940873478] [2020-12-22 10:11:00,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:11:00,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:11:00,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491507049] [2020-12-22 10:11:00,707 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:11:00,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:11:00,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:11:00,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:11:00,708 INFO L87 Difference]: Start difference. First operand 5578 states and 8634 transitions. Second operand 3 states. [2020-12-22 10:11:00,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:11:00,995 INFO L93 Difference]: Finished difference Result 10400 states and 16046 transitions. [2020-12-22 10:11:00,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:11:00,995 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 93 [2020-12-22 10:11:00,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:11:01,011 INFO L225 Difference]: With dead ends: 10400 [2020-12-22 10:11:01,012 INFO L226 Difference]: Without dead ends: 7134 [2020-12-22 10:11:01,018 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 10:11:01,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7134 states. [2020-12-22 10:11:01,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7134 to 7132. [2020-12-22 10:11:01,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7132 states. [2020-12-22 10:11:01,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7132 states to 7132 states and 10972 transitions. [2020-12-22 10:11:01,356 INFO L78 Accepts]: Start accepts. Automaton has 7132 states and 10972 transitions. Word has length 93 [2020-12-22 10:11:01,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:11:01,356 INFO L481 AbstractCegarLoop]: Abstraction has 7132 states and 10972 transitions. [2020-12-22 10:11:01,356 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:11:01,356 INFO L276 IsEmpty]: Start isEmpty. Operand 7132 states and 10972 transitions. [2020-12-22 10:11:01,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 10:11:01,357 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:11:01,357 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, 1, 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 10:11:01,358 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 10:11:01,358 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:11:01,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:11:01,358 INFO L82 PathProgramCache]: Analyzing trace with hash 36133186, now seen corresponding path program 1 times [2020-12-22 10:11:01,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:11:01,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916866350] [2020-12-22 10:11:01,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:11:01,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:11:01,662 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 10:11:01,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916866350] [2020-12-22 10:11:01,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:11:01,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:11:01,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447480353] [2020-12-22 10:11:01,664 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:11:01,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:11:01,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:11:01,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:11:01,665 INFO L87 Difference]: Start difference. First operand 7132 states and 10972 transitions. Second operand 9 states. [2020-12-22 10:11:02,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:11:02,548 INFO L93 Difference]: Finished difference Result 11952 states and 18334 transitions. [2020-12-22 10:11:02,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:11:02,549 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 93 [2020-12-22 10:11:02,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:11:02,563 INFO L225 Difference]: With dead ends: 11952 [2020-12-22 10:11:02,563 INFO L226 Difference]: Without dead ends: 7134 [2020-12-22 10:11:02,570 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2020-12-22 10:11:02,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7134 states. [2020-12-22 10:11:03,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7134 to 7132. [2020-12-22 10:11:03,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7132 states. [2020-12-22 10:11:03,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7132 states to 7132 states and 10924 transitions. [2020-12-22 10:11:03,026 INFO L78 Accepts]: Start accepts. Automaton has 7132 states and 10924 transitions. Word has length 93 [2020-12-22 10:11:03,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:11:03,027 INFO L481 AbstractCegarLoop]: Abstraction has 7132 states and 10924 transitions. [2020-12-22 10:11:03,027 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:11:03,027 INFO L276 IsEmpty]: Start isEmpty. Operand 7132 states and 10924 transitions. [2020-12-22 10:11:03,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 10:11:03,028 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:11:03,029 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, 1, 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 10:11:03,029 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 10:11:03,029 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:11:03,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:11:03,030 INFO L82 PathProgramCache]: Analyzing trace with hash 1825047262, now seen corresponding path program 1 times [2020-12-22 10:11:03,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:11:03,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088473897] [2020-12-22 10:11:03,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:11:03,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:11:03,114 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 10:11:03,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088473897] [2020-12-22 10:11:03,115 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:11:03,115 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:11:03,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73926727] [2020-12-22 10:11:03,116 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:11:03,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:11:03,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:11:03,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:11:03,117 INFO L87 Difference]: Start difference. First operand 7132 states and 10924 transitions. Second operand 3 states. [2020-12-22 10:11:03,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:11:03,723 INFO L93 Difference]: Finished difference Result 16192 states and 24590 transitions. [2020-12-22 10:11:03,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:11:03,724 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 93 [2020-12-22 10:11:03,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:11:03,745 INFO L225 Difference]: With dead ends: 16192 [2020-12-22 10:11:03,746 INFO L226 Difference]: Without dead ends: 11374 [2020-12-22 10:11:03,755 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 10:11:03,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11374 states. [2020-12-22 10:11:04,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11374 to 11372. [2020-12-22 10:11:04,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11372 states. [2020-12-22 10:11:04,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11372 states to 11372 states and 17180 transitions. [2020-12-22 10:11:04,402 INFO L78 Accepts]: Start accepts. Automaton has 11372 states and 17180 transitions. Word has length 93 [2020-12-22 10:11:04,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:11:04,402 INFO L481 AbstractCegarLoop]: Abstraction has 11372 states and 17180 transitions. [2020-12-22 10:11:04,403 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:11:04,403 INFO L276 IsEmpty]: Start isEmpty. Operand 11372 states and 17180 transitions. [2020-12-22 10:11:04,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 10:11:04,404 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:11:04,404 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, 1, 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 10:11:04,404 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 10:11:04,405 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:11:04,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:11:04,405 INFO L82 PathProgramCache]: Analyzing trace with hash -1222412418, now seen corresponding path program 1 times [2020-12-22 10:11:04,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:11:04,406 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775107346] [2020-12-22 10:11:04,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:11:04,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:11:04,485 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 10:11:04,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775107346] [2020-12-22 10:11:04,486 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:11:04,486 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:11:04,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014333915] [2020-12-22 10:11:04,487 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:11:04,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:11:04,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:11:04,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:11:04,494 INFO L87 Difference]: Start difference. First operand 11372 states and 17180 transitions. Second operand 3 states. [2020-12-22 10:11:05,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:11:05,486 INFO L93 Difference]: Finished difference Result 28336 states and 42398 transitions. [2020-12-22 10:11:05,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:11:05,487 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 93 [2020-12-22 10:11:05,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:11:05,526 INFO L225 Difference]: With dead ends: 28336 [2020-12-22 10:11:05,526 INFO L226 Difference]: Without dead ends: 19278 [2020-12-22 10:11:05,541 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 10:11:05,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19278 states. [2020-12-22 10:11:06,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19278 to 19276. [2020-12-22 10:11:06,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19276 states. [2020-12-22 10:11:06,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19276 states to 19276 states and 28636 transitions. [2020-12-22 10:11:06,683 INFO L78 Accepts]: Start accepts. Automaton has 19276 states and 28636 transitions. Word has length 93 [2020-12-22 10:11:06,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:11:06,684 INFO L481 AbstractCegarLoop]: Abstraction has 19276 states and 28636 transitions. [2020-12-22 10:11:06,684 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:11:06,684 INFO L276 IsEmpty]: Start isEmpty. Operand 19276 states and 28636 transitions. [2020-12-22 10:11:06,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 10:11:06,685 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:11:06,685 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, 1, 1, 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 10:11:06,686 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 10:11:06,686 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:11:06,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:11:06,687 INFO L82 PathProgramCache]: Analyzing trace with hash 705405902, now seen corresponding path program 1 times [2020-12-22 10:11:06,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:11:06,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058892830] [2020-12-22 10:11:06,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:11:06,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:11:06,794 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 10:11:06,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058892830] [2020-12-22 10:11:06,794 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:11:06,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:11:06,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188585594] [2020-12-22 10:11:06,795 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 10:11:06,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:11:06,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 10:11:06,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 10:11:06,796 INFO L87 Difference]: Start difference. First operand 19276 states and 28636 transitions. Second operand 6 states. [2020-12-22 10:11:08,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:11:08,855 INFO L93 Difference]: Finished difference Result 51856 states and 76830 transitions. [2020-12-22 10:11:08,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 10:11:08,855 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 94 [2020-12-22 10:11:08,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:11:08,928 INFO L225 Difference]: With dead ends: 51856 [2020-12-22 10:11:08,928 INFO L226 Difference]: Without dead ends: 34894 [2020-12-22 10:11:08,952 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 10:11:08,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34894 states. [2020-12-22 10:11:10,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34894 to 30796. [2020-12-22 10:11:10,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30796 states. [2020-12-22 10:11:10,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30796 states to 30796 states and 45532 transitions. [2020-12-22 10:11:10,804 INFO L78 Accepts]: Start accepts. Automaton has 30796 states and 45532 transitions. Word has length 94 [2020-12-22 10:11:10,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:11:10,804 INFO L481 AbstractCegarLoop]: Abstraction has 30796 states and 45532 transitions. [2020-12-22 10:11:10,804 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 10:11:10,804 INFO L276 IsEmpty]: Start isEmpty. Operand 30796 states and 45532 transitions. [2020-12-22 10:11:10,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 10:11:10,805 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:11:10,805 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, 1, 1, 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 10:11:10,806 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 10:11:10,806 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:11:10,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:11:10,806 INFO L82 PathProgramCache]: Analyzing trace with hash 1549411404, now seen corresponding path program 1 times [2020-12-22 10:11:10,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:11:10,807 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102920299] [2020-12-22 10:11:10,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:11:10,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:11:10,908 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 10:11:10,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102920299] [2020-12-22 10:11:10,909 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:11:10,909 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:11:10,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517641695] [2020-12-22 10:11:10,910 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 10:11:10,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:11:10,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 10:11:10,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 10:11:10,911 INFO L87 Difference]: Start difference. First operand 30796 states and 45532 transitions. Second operand 6 states. [2020-12-22 10:11:12,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:11:12,618 INFO L93 Difference]: Finished difference Result 59278 states and 87453 transitions. [2020-12-22 10:11:12,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 10:11:12,619 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 94 [2020-12-22 10:11:12,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:11:12,666 INFO L225 Difference]: With dead ends: 59278 [2020-12-22 10:11:12,666 INFO L226 Difference]: Without dead ends: 30796 [2020-12-22 10:11:12,697 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 10:11:12,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30796 states. [2020-12-22 10:11:14,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30796 to 30796. [2020-12-22 10:11:14,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30796 states. [2020-12-22 10:11:14,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30796 states to 30796 states and 45212 transitions. [2020-12-22 10:11:14,925 INFO L78 Accepts]: Start accepts. Automaton has 30796 states and 45212 transitions. Word has length 94 [2020-12-22 10:11:14,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:11:14,925 INFO L481 AbstractCegarLoop]: Abstraction has 30796 states and 45212 transitions. [2020-12-22 10:11:14,925 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 10:11:14,925 INFO L276 IsEmpty]: Start isEmpty. Operand 30796 states and 45212 transitions. [2020-12-22 10:11:14,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 10:11:14,926 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:11:14,927 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, 1, 1, 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 10:11:14,927 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 10:11:14,927 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:11:14,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:11:14,928 INFO L82 PathProgramCache]: Analyzing trace with hash 847811530, now seen corresponding path program 1 times [2020-12-22 10:11:14,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:11:14,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328136337] [2020-12-22 10:11:14,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:11:14,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:11:15,070 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 10:11:15,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328136337] [2020-12-22 10:11:15,071 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:11:15,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:11:15,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905568829] [2020-12-22 10:11:15,072 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:11:15,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:11:15,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:11:15,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:11:15,073 INFO L87 Difference]: Start difference. First operand 30796 states and 45212 transitions. Second operand 8 states. [2020-12-22 10:11:18,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:11:18,729 INFO L93 Difference]: Finished difference Result 57839 states and 83910 transitions. [2020-12-22 10:11:18,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:11:18,730 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 94 [2020-12-22 10:11:18,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:11:18,822 INFO L225 Difference]: With dead ends: 57839 [2020-12-22 10:11:18,822 INFO L226 Difference]: Without dead ends: 57837 [2020-12-22 10:11:18,837 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:11:18,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57837 states. [2020-12-22 10:11:21,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57837 to 32332. [2020-12-22 10:11:21,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32332 states. [2020-12-22 10:11:21,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32332 states to 32332 states and 46684 transitions. [2020-12-22 10:11:21,539 INFO L78 Accepts]: Start accepts. Automaton has 32332 states and 46684 transitions. Word has length 94 [2020-12-22 10:11:21,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:11:21,539 INFO L481 AbstractCegarLoop]: Abstraction has 32332 states and 46684 transitions. [2020-12-22 10:11:21,539 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:11:21,540 INFO L276 IsEmpty]: Start isEmpty. Operand 32332 states and 46684 transitions. [2020-12-22 10:11:21,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-22 10:11:21,558 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:11:21,558 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:11:21,558 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 10:11:21,559 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:11:21,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:11:21,559 INFO L82 PathProgramCache]: Analyzing trace with hash 101873069, now seen corresponding path program 1 times [2020-12-22 10:11:21,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:11:21,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596830221] [2020-12-22 10:11:21,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:11:21,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:11:21,741 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-22 10:11:21,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596830221] [2020-12-22 10:11:21,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:11:21,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:11:21,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306462306] [2020-12-22 10:11:21,743 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:11:21,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:11:21,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:11:21,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:11:21,744 INFO L87 Difference]: Start difference. First operand 32332 states and 46684 transitions. Second operand 9 states. [2020-12-22 10:11:35,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:11:35,004 INFO L93 Difference]: Finished difference Result 252060 states and 361668 transitions. [2020-12-22 10:11:35,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:11:35,005 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 130 [2020-12-22 10:11:35,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:11:35,612 INFO L225 Difference]: With dead ends: 252060 [2020-12-22 10:11:35,612 INFO L226 Difference]: Without dead ends: 222042 [2020-12-22 10:11:35,697 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:11:35,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222042 states. [2020-12-22 10:11:41,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222042 to 62348. [2020-12-22 10:11:41,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62348 states. [2020-12-22 10:11:41,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62348 states to 62348 states and 89436 transitions. [2020-12-22 10:11:41,569 INFO L78 Accepts]: Start accepts. Automaton has 62348 states and 89436 transitions. Word has length 130 [2020-12-22 10:11:41,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:11:41,569 INFO L481 AbstractCegarLoop]: Abstraction has 62348 states and 89436 transitions. [2020-12-22 10:11:41,569 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:11:41,569 INFO L276 IsEmpty]: Start isEmpty. Operand 62348 states and 89436 transitions. [2020-12-22 10:11:41,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-22 10:11:41,590 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:11:41,590 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:11:41,590 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 10:11:41,591 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:11:41,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:11:41,591 INFO L82 PathProgramCache]: Analyzing trace with hash 1349380685, now seen corresponding path program 1 times [2020-12-22 10:11:41,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:11:41,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558700523] [2020-12-22 10:11:41,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:11:41,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:11:41,761 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-22 10:11:41,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558700523] [2020-12-22 10:11:41,762 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:11:41,762 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:11:41,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324557850] [2020-12-22 10:11:41,762 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:11:41,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:11:41,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:11:41,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:11:41,763 INFO L87 Difference]: Start difference. First operand 62348 states and 89436 transitions. Second operand 9 states. [2020-12-22 10:11:58,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:11:58,129 INFO L93 Difference]: Finished difference Result 282076 states and 404420 transitions. [2020-12-22 10:11:58,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:11:58,129 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 130 [2020-12-22 10:11:58,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:11:58,649 INFO L225 Difference]: With dead ends: 282076 [2020-12-22 10:11:58,649 INFO L226 Difference]: Without dead ends: 252058 [2020-12-22 10:11:58,732 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:11:58,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252058 states. [2020-12-22 10:12:07,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252058 to 107404. [2020-12-22 10:12:07,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107404 states. [2020-12-22 10:12:07,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107404 states to 107404 states and 153276 transitions. [2020-12-22 10:12:07,942 INFO L78 Accepts]: Start accepts. Automaton has 107404 states and 153276 transitions. Word has length 130 [2020-12-22 10:12:07,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:12:07,942 INFO L481 AbstractCegarLoop]: Abstraction has 107404 states and 153276 transitions. [2020-12-22 10:12:07,942 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:12:07,942 INFO L276 IsEmpty]: Start isEmpty. Operand 107404 states and 153276 transitions. [2020-12-22 10:12:07,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-22 10:12:07,961 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:12:07,962 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:12:07,962 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 10:12:07,962 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:12:07,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:12:07,963 INFO L82 PathProgramCache]: Analyzing trace with hash -1476153629, now seen corresponding path program 1 times [2020-12-22 10:12:07,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:12:07,963 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563380646] [2020-12-22 10:12:07,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:12:07,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:12:08,130 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 10:12:08,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563380646] [2020-12-22 10:12:08,131 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:12:08,131 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:12:08,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732725672] [2020-12-22 10:12:08,132 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:12:08,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:12:08,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:12:08,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:12:08,132 INFO L87 Difference]: Start difference. First operand 107404 states and 153276 transitions. Second operand 9 states. [2020-12-22 10:12:27,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:12:27,785 INFO L93 Difference]: Finished difference Result 312092 states and 447172 transitions. [2020-12-22 10:12:27,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:12:27,785 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 130 [2020-12-22 10:12:27,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:12:28,221 INFO L225 Difference]: With dead ends: 312092 [2020-12-22 10:12:28,221 INFO L226 Difference]: Without dead ends: 282074 [2020-12-22 10:12:28,318 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:12:28,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282074 states. [2020-12-22 10:12:39,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282074 to 137420. [2020-12-22 10:12:39,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137420 states. [2020-12-22 10:12:40,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137420 states to 137420 states and 196028 transitions. [2020-12-22 10:12:40,221 INFO L78 Accepts]: Start accepts. Automaton has 137420 states and 196028 transitions. Word has length 130 [2020-12-22 10:12:40,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:12:40,222 INFO L481 AbstractCegarLoop]: Abstraction has 137420 states and 196028 transitions. [2020-12-22 10:12:40,222 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:12:40,222 INFO L276 IsEmpty]: Start isEmpty. Operand 137420 states and 196028 transitions. [2020-12-22 10:12:40,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-22 10:12:40,245 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:12:40,245 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:12:40,245 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 10:12:40,245 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:12:40,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:12:40,246 INFO L82 PathProgramCache]: Analyzing trace with hash 1583354627, now seen corresponding path program 1 times [2020-12-22 10:12:40,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:12:40,246 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320351028] [2020-12-22 10:12:40,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:12:40,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:12:40,419 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 10:12:40,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320351028] [2020-12-22 10:12:40,420 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:12:40,420 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:12:40,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981855954] [2020-12-22 10:12:40,420 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:12:40,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:12:40,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:12:40,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:12:40,421 INFO L87 Difference]: Start difference. First operand 137420 states and 196028 transitions. Second operand 9 states. [2020-12-22 10:12:40,737 WARN L197 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-12-22 10:13:04,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:13:04,379 INFO L93 Difference]: Finished difference Result 342108 states and 489924 transitions. [2020-12-22 10:13:04,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:13:04,380 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 130 [2020-12-22 10:13:04,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:13:04,985 INFO L225 Difference]: With dead ends: 342108 [2020-12-22 10:13:04,985 INFO L226 Difference]: Without dead ends: 312090 [2020-12-22 10:13:05,065 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:13:05,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312090 states.