/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 08:44:21,412 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 08:44:21,416 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 08:44:21,477 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 08:44:21,478 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 08:44:21,484 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 08:44:21,489 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 08:44:21,498 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 08:44:21,502 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 08:44:21,508 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 08:44:21,510 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 08:44:21,512 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 08:44:21,512 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 08:44:21,515 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 08:44:21,518 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 08:44:21,520 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 08:44:21,521 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 08:44:21,538 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 08:44:21,545 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 08:44:21,554 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 08:44:21,556 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 08:44:21,558 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 08:44:21,561 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 08:44:21,563 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 08:44:21,571 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 08:44:21,583 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 08:44:21,584 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 08:44:21,585 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 08:44:21,586 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 08:44:21,641 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 08:44:21,641 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 08:44:21,646 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 08:44:21,647 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 08:44:21,647 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 08:44:21,647 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 08:44:21,647 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 08:44:21,647 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 08:44:21,648 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 08:44:21,648 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 08:44:21,649 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 08:44:21,650 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 08:44:21,650 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 08:44:21,650 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 08:44:21,650 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 08:44:21,650 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 08:44:21,651 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 08:44:21,651 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 08:44:21,651 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 08:44:21,651 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 08:44:21,652 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 08:44:21,652 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 08:44:21,652 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 08:44:21,652 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 08:44:21,653 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 08:44:21,653 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 08:44:22,101 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 08:44:22,134 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 08:44:22,137 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 08:44:22,139 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 08:44:22,140 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 08:44:22,141 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-12-22 08:44:22,218 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c830d019a/bf730e7d6e024ae789aad82110eeeeaf/FLAGd4620c55c [2020-12-22 08:44:23,049 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 08:44:23,050 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-12-22 08:44:23,066 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c830d019a/bf730e7d6e024ae789aad82110eeeeaf/FLAGd4620c55c [2020-12-22 08:44:23,349 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c830d019a/bf730e7d6e024ae789aad82110eeeeaf [2020-12-22 08:44:23,353 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 08:44:23,355 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 08:44:23,359 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 08:44:23,360 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 08:44:23,364 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 08:44:23,365 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:44:23" (1/1) ... [2020-12-22 08:44:23,368 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@232b1740 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:44:23, skipping insertion in model container [2020-12-22 08:44:23,368 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:44:23" (1/1) ... [2020-12-22 08:44:23,378 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 08:44:23,450 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 08:44:23,692 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[6232,6245] [2020-12-22 08:44:23,745 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:44:23,762 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 08:44:23,818 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[6232,6245] [2020-12-22 08:44:23,849 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:44:23,884 INFO L208 MainTranslator]: Completed translation [2020-12-22 08:44:23,884 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:44:23 WrapperNode [2020-12-22 08:44:23,884 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 08:44:23,887 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 08:44:23,887 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 08:44:23,887 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 08:44:23,896 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:44:23" (1/1) ... [2020-12-22 08:44:23,909 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:44:23" (1/1) ... [2020-12-22 08:44:23,969 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 08:44:23,970 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 08:44:23,970 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 08:44:23,970 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 08:44:23,991 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:44:23" (1/1) ... [2020-12-22 08:44:23,991 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:44:23" (1/1) ... [2020-12-22 08:44:23,996 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:44:23" (1/1) ... [2020-12-22 08:44:23,997 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:44:23" (1/1) ... [2020-12-22 08:44:24,007 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:44:23" (1/1) ... [2020-12-22 08:44:24,015 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:44:23" (1/1) ... [2020-12-22 08:44:24,019 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:44:23" (1/1) ... [2020-12-22 08:44:24,025 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 08:44:24,026 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 08:44:24,026 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 08:44:24,027 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 08:44:24,028 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:44:23" (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 08:44:24,175 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 08:44:24,177 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 08:44:24,177 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 08:44:24,177 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 08:44:25,173 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 08:44:25,173 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-22 08:44:25,175 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:44:25 BoogieIcfgContainer [2020-12-22 08:44:25,176 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 08:44:25,178 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 08:44:25,178 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 08:44:25,183 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 08:44:25,183 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 08:44:23" (1/3) ... [2020-12-22 08:44:25,188 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c5f1ce7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:44:25, skipping insertion in model container [2020-12-22 08:44:25,189 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:44:23" (2/3) ... [2020-12-22 08:44:25,189 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c5f1ce7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:44:25, skipping insertion in model container [2020-12-22 08:44:25,190 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:44:25" (3/3) ... [2020-12-22 08:44:25,192 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-12-22 08:44:25,199 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 08:44:25,205 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 08:44:25,226 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 08:44:25,258 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 08:44:25,258 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 08:44:25,259 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 08:44:25,259 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 08:44:25,259 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 08:44:25,259 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 08:44:25,259 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 08:44:25,259 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 08:44:25,280 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states. [2020-12-22 08:44:25,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-22 08:44:25,290 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:44:25,291 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] [2020-12-22 08:44:25,292 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:44:25,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:44:25,299 INFO L82 PathProgramCache]: Analyzing trace with hash -1503533793, now seen corresponding path program 1 times [2020-12-22 08:44:25,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:44:25,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550356671] [2020-12-22 08:44:25,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:44:25,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:44:25,798 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 08:44:25,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550356671] [2020-12-22 08:44:25,800 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:44:25,800 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:44:25,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691157371] [2020-12-22 08:44:25,807 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:44:25,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:44:25,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:44:25,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:44:25,826 INFO L87 Difference]: Start difference. First operand 123 states. Second operand 3 states. [2020-12-22 08:44:25,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:44:25,949 INFO L93 Difference]: Finished difference Result 245 states and 401 transitions. [2020-12-22 08:44:25,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:44:25,951 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 61 [2020-12-22 08:44:25,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:44:25,968 INFO L225 Difference]: With dead ends: 245 [2020-12-22 08:44:25,968 INFO L226 Difference]: Without dead ends: 184 [2020-12-22 08:44:25,972 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 08:44:25,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-12-22 08:44:26,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 182. [2020-12-22 08:44:26,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-12-22 08:44:26,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 263 transitions. [2020-12-22 08:44:26,043 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 263 transitions. Word has length 61 [2020-12-22 08:44:26,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:44:26,044 INFO L481 AbstractCegarLoop]: Abstraction has 182 states and 263 transitions. [2020-12-22 08:44:26,045 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:44:26,045 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 263 transitions. [2020-12-22 08:44:26,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 08:44:26,048 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:44:26,067 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 08:44:26,067 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 08:44:26,067 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:44:26,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:44:26,071 INFO L82 PathProgramCache]: Analyzing trace with hash -886934908, now seen corresponding path program 1 times [2020-12-22 08:44:26,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:44:26,072 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504728483] [2020-12-22 08:44:26,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:44:26,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:44:26,295 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 08:44:26,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504728483] [2020-12-22 08:44:26,296 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:44:26,297 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:44:26,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417986263] [2020-12-22 08:44:26,301 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:44:26,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:44:26,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:44:26,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:44:26,303 INFO L87 Difference]: Start difference. First operand 182 states and 263 transitions. Second operand 5 states. [2020-12-22 08:44:26,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:44:26,667 INFO L93 Difference]: Finished difference Result 335 states and 496 transitions. [2020-12-22 08:44:26,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:44:26,668 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 63 [2020-12-22 08:44:26,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:44:26,677 INFO L225 Difference]: With dead ends: 335 [2020-12-22 08:44:26,677 INFO L226 Difference]: Without dead ends: 182 [2020-12-22 08:44:26,681 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:44:26,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-12-22 08:44:26,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 182. [2020-12-22 08:44:26,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-12-22 08:44:26,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 260 transitions. [2020-12-22 08:44:26,722 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 260 transitions. Word has length 63 [2020-12-22 08:44:26,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:44:26,723 INFO L481 AbstractCegarLoop]: Abstraction has 182 states and 260 transitions. [2020-12-22 08:44:26,723 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:44:26,723 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 260 transitions. [2020-12-22 08:44:26,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 08:44:26,726 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:44:26,726 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:44:26,726 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 08:44:26,726 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:44:26,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:44:26,727 INFO L82 PathProgramCache]: Analyzing trace with hash 802634649, now seen corresponding path program 1 times [2020-12-22 08:44:26,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:44:26,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13940504] [2020-12-22 08:44:26,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:44:26,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:44:26,872 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 08:44:26,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13940504] [2020-12-22 08:44:26,874 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:44:26,874 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:44:26,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63386368] [2020-12-22 08:44:26,875 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:44:26,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:44:26,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:44:26,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:44:26,876 INFO L87 Difference]: Start difference. First operand 182 states and 260 transitions. Second operand 6 states. [2020-12-22 08:44:27,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:44:27,097 INFO L93 Difference]: Finished difference Result 421 states and 626 transitions. [2020-12-22 08:44:27,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:44:27,097 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 64 [2020-12-22 08:44:27,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:44:27,100 INFO L225 Difference]: With dead ends: 421 [2020-12-22 08:44:27,100 INFO L226 Difference]: Without dead ends: 280 [2020-12-22 08:44:27,102 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-12-22 08:44:27,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-12-22 08:44:27,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 278. [2020-12-22 08:44:27,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2020-12-22 08:44:27,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 406 transitions. [2020-12-22 08:44:27,151 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 406 transitions. Word has length 64 [2020-12-22 08:44:27,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:44:27,154 INFO L481 AbstractCegarLoop]: Abstraction has 278 states and 406 transitions. [2020-12-22 08:44:27,154 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:44:27,154 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 406 transitions. [2020-12-22 08:44:27,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 08:44:27,158 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:44:27,159 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] [2020-12-22 08:44:27,162 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 08:44:27,162 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:44:27,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:44:27,163 INFO L82 PathProgramCache]: Analyzing trace with hash -1237540328, now seen corresponding path program 1 times [2020-12-22 08:44:27,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:44:27,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143654279] [2020-12-22 08:44:27,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:44:27,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:44:27,340 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 08:44:27,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143654279] [2020-12-22 08:44:27,341 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:44:27,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:44:27,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283726269] [2020-12-22 08:44:27,343 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:44:27,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:44:27,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:44:27,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:44:27,348 INFO L87 Difference]: Start difference. First operand 278 states and 406 transitions. Second operand 5 states. [2020-12-22 08:44:27,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:44:27,547 INFO L93 Difference]: Finished difference Result 519 states and 773 transitions. [2020-12-22 08:44:27,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:44:27,548 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 65 [2020-12-22 08:44:27,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:44:27,553 INFO L225 Difference]: With dead ends: 519 [2020-12-22 08:44:27,553 INFO L226 Difference]: Without dead ends: 278 [2020-12-22 08:44:27,557 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:44:27,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2020-12-22 08:44:27,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 278. [2020-12-22 08:44:27,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2020-12-22 08:44:27,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 401 transitions. [2020-12-22 08:44:27,596 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 401 transitions. Word has length 65 [2020-12-22 08:44:27,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:44:27,598 INFO L481 AbstractCegarLoop]: Abstraction has 278 states and 401 transitions. [2020-12-22 08:44:27,598 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:44:27,598 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 401 transitions. [2020-12-22 08:44:27,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 08:44:27,603 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:44:27,604 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:44:27,604 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 08:44:27,604 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:44:27,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:44:27,605 INFO L82 PathProgramCache]: Analyzing trace with hash 2023216621, now seen corresponding path program 1 times [2020-12-22 08:44:27,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:44:27,606 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124411020] [2020-12-22 08:44:27,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:44:27,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:44:27,753 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 08:44:27,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124411020] [2020-12-22 08:44:27,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:44:27,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:44:27,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204773891] [2020-12-22 08:44:27,756 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:44:27,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:44:27,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:44:27,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:44:27,759 INFO L87 Difference]: Start difference. First operand 278 states and 401 transitions. Second operand 5 states. [2020-12-22 08:44:27,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:44:27,913 INFO L93 Difference]: Finished difference Result 523 states and 768 transitions. [2020-12-22 08:44:27,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:44:27,913 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 66 [2020-12-22 08:44:27,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:44:27,918 INFO L225 Difference]: With dead ends: 523 [2020-12-22 08:44:27,918 INFO L226 Difference]: Without dead ends: 278 [2020-12-22 08:44:27,920 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:44:27,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2020-12-22 08:44:27,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 278. [2020-12-22 08:44:27,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2020-12-22 08:44:27,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 396 transitions. [2020-12-22 08:44:27,947 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 396 transitions. Word has length 66 [2020-12-22 08:44:27,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:44:27,947 INFO L481 AbstractCegarLoop]: Abstraction has 278 states and 396 transitions. [2020-12-22 08:44:27,947 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:44:27,947 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 396 transitions. [2020-12-22 08:44:27,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 08:44:27,954 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:44:27,955 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:44:27,955 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 08:44:27,955 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:44:27,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:44:27,956 INFO L82 PathProgramCache]: Analyzing trace with hash -1272574804, now seen corresponding path program 1 times [2020-12-22 08:44:27,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:44:27,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158987026] [2020-12-22 08:44:27,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:44:28,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:44:28,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:44:28,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158987026] [2020-12-22 08:44:28,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:44:28,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:44:28,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067692832] [2020-12-22 08:44:28,119 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:44:28,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:44:28,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:44:28,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:44:28,122 INFO L87 Difference]: Start difference. First operand 278 states and 396 transitions. Second operand 6 states. [2020-12-22 08:44:28,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:44:28,329 INFO L93 Difference]: Finished difference Result 1103 states and 1635 transitions. [2020-12-22 08:44:28,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 08:44:28,329 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 67 [2020-12-22 08:44:28,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:44:28,338 INFO L225 Difference]: With dead ends: 1103 [2020-12-22 08:44:28,338 INFO L226 Difference]: Without dead ends: 911 [2020-12-22 08:44:28,339 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-12-22 08:44:28,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 911 states. [2020-12-22 08:44:28,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 911 to 377. [2020-12-22 08:44:28,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 377 states. [2020-12-22 08:44:28,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 547 transitions. [2020-12-22 08:44:28,412 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 547 transitions. Word has length 67 [2020-12-22 08:44:28,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:44:28,412 INFO L481 AbstractCegarLoop]: Abstraction has 377 states and 547 transitions. [2020-12-22 08:44:28,412 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:44:28,413 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 547 transitions. [2020-12-22 08:44:28,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 08:44:28,414 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:44:28,414 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:44:28,415 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 08:44:28,415 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:44:28,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:44:28,417 INFO L82 PathProgramCache]: Analyzing trace with hash 112254648, now seen corresponding path program 1 times [2020-12-22 08:44:28,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:44:28,422 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617224833] [2020-12-22 08:44:28,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:44:28,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:44:28,570 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 08:44:28,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617224833] [2020-12-22 08:44:28,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:44:28,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:44:28,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126239752] [2020-12-22 08:44:28,572 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:44:28,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:44:28,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:44:28,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:44:28,574 INFO L87 Difference]: Start difference. First operand 377 states and 547 transitions. Second operand 6 states. [2020-12-22 08:44:28,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:44:28,806 INFO L93 Difference]: Finished difference Result 1190 states and 1767 transitions. [2020-12-22 08:44:28,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 08:44:28,807 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 67 [2020-12-22 08:44:28,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:44:28,815 INFO L225 Difference]: With dead ends: 1190 [2020-12-22 08:44:28,815 INFO L226 Difference]: Without dead ends: 998 [2020-12-22 08:44:28,817 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:44:28,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 998 states. [2020-12-22 08:44:28,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 998 to 583. [2020-12-22 08:44:28,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 583 states. [2020-12-22 08:44:28,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 860 transitions. [2020-12-22 08:44:28,893 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 860 transitions. Word has length 67 [2020-12-22 08:44:28,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:44:28,895 INFO L481 AbstractCegarLoop]: Abstraction has 583 states and 860 transitions. [2020-12-22 08:44:28,895 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:44:28,895 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 860 transitions. [2020-12-22 08:44:28,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 08:44:28,903 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:44:28,903 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:44:28,904 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 08:44:28,904 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:44:28,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:44:28,904 INFO L82 PathProgramCache]: Analyzing trace with hash 943476066, now seen corresponding path program 1 times [2020-12-22 08:44:28,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:44:28,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334772804] [2020-12-22 08:44:28,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:44:28,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:44:28,968 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 08:44:28,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334772804] [2020-12-22 08:44:28,969 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:44:28,969 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:44:28,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274391512] [2020-12-22 08:44:28,969 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:44:28,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:44:28,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:44:28,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:44:28,971 INFO L87 Difference]: Start difference. First operand 583 states and 860 transitions. Second operand 3 states. [2020-12-22 08:44:29,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:44:29,144 INFO L93 Difference]: Finished difference Result 1505 states and 2242 transitions. [2020-12-22 08:44:29,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:44:29,144 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 67 [2020-12-22 08:44:29,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:44:29,150 INFO L225 Difference]: With dead ends: 1505 [2020-12-22 08:44:29,150 INFO L226 Difference]: Without dead ends: 1016 [2020-12-22 08:44:29,152 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 08:44:29,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1016 states. [2020-12-22 08:44:29,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1016 to 994. [2020-12-22 08:44:29,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 994 states. [2020-12-22 08:44:29,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 994 states to 994 states and 1453 transitions. [2020-12-22 08:44:29,325 INFO L78 Accepts]: Start accepts. Automaton has 994 states and 1453 transitions. Word has length 67 [2020-12-22 08:44:29,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:44:29,325 INFO L481 AbstractCegarLoop]: Abstraction has 994 states and 1453 transitions. [2020-12-22 08:44:29,326 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:44:29,326 INFO L276 IsEmpty]: Start isEmpty. Operand 994 states and 1453 transitions. [2020-12-22 08:44:29,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 08:44:29,327 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:44:29,327 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:44:29,327 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 08:44:29,328 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:44:29,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:44:29,328 INFO L82 PathProgramCache]: Analyzing trace with hash 1116055329, now seen corresponding path program 1 times [2020-12-22 08:44:29,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:44:29,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918801542] [2020-12-22 08:44:29,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:44:29,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:44:29,384 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 08:44:29,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918801542] [2020-12-22 08:44:29,385 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:44:29,385 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:44:29,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272615319] [2020-12-22 08:44:29,386 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:44:29,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:44:29,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:44:29,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:44:29,387 INFO L87 Difference]: Start difference. First operand 994 states and 1453 transitions. Second operand 3 states. [2020-12-22 08:44:29,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:44:29,626 INFO L93 Difference]: Finished difference Result 2436 states and 3587 transitions. [2020-12-22 08:44:29,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:44:29,627 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 67 [2020-12-22 08:44:29,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:44:29,636 INFO L225 Difference]: With dead ends: 2436 [2020-12-22 08:44:29,636 INFO L226 Difference]: Without dead ends: 1536 [2020-12-22 08:44:29,639 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 08:44:29,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1536 states. [2020-12-22 08:44:29,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1536 to 1534. [2020-12-22 08:44:29,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1534 states. [2020-12-22 08:44:29,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1534 states to 1534 states and 2235 transitions. [2020-12-22 08:44:29,840 INFO L78 Accepts]: Start accepts. Automaton has 1534 states and 2235 transitions. Word has length 67 [2020-12-22 08:44:29,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:44:29,840 INFO L481 AbstractCegarLoop]: Abstraction has 1534 states and 2235 transitions. [2020-12-22 08:44:29,840 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:44:29,840 INFO L276 IsEmpty]: Start isEmpty. Operand 1534 states and 2235 transitions. [2020-12-22 08:44:29,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 08:44:29,841 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:44:29,842 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:44:29,842 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 08:44:29,842 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:44:29,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:44:29,843 INFO L82 PathProgramCache]: Analyzing trace with hash -1891365172, now seen corresponding path program 1 times [2020-12-22 08:44:29,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:44:29,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17380370] [2020-12-22 08:44:29,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:44:29,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:44:29,966 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 08:44:29,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17380370] [2020-12-22 08:44:29,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:44:29,968 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:44:29,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657052510] [2020-12-22 08:44:29,968 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:44:29,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:44:29,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:44:29,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:44:29,974 INFO L87 Difference]: Start difference. First operand 1534 states and 2235 transitions. Second operand 6 states. [2020-12-22 08:44:30,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:44:30,437 INFO L93 Difference]: Finished difference Result 3616 states and 5297 transitions. [2020-12-22 08:44:30,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 08:44:30,439 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 67 [2020-12-22 08:44:30,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:44:30,458 INFO L225 Difference]: With dead ends: 3616 [2020-12-22 08:44:30,458 INFO L226 Difference]: Without dead ends: 3082 [2020-12-22 08:44:30,461 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-12-22 08:44:30,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3082 states. [2020-12-22 08:44:30,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3082 to 1908. [2020-12-22 08:44:30,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1908 states. [2020-12-22 08:44:30,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1908 states to 1908 states and 2785 transitions. [2020-12-22 08:44:30,747 INFO L78 Accepts]: Start accepts. Automaton has 1908 states and 2785 transitions. Word has length 67 [2020-12-22 08:44:30,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:44:30,747 INFO L481 AbstractCegarLoop]: Abstraction has 1908 states and 2785 transitions. [2020-12-22 08:44:30,747 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:44:30,747 INFO L276 IsEmpty]: Start isEmpty. Operand 1908 states and 2785 transitions. [2020-12-22 08:44:30,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 08:44:30,749 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:44:30,749 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:44:30,749 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 08:44:30,749 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:44:30,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:44:30,750 INFO L82 PathProgramCache]: Analyzing trace with hash 2078718872, now seen corresponding path program 1 times [2020-12-22 08:44:30,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:44:30,750 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127252036] [2020-12-22 08:44:30,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:44:30,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:44:30,880 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 08:44:30,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127252036] [2020-12-22 08:44:30,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:44:30,881 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:44:30,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119952110] [2020-12-22 08:44:30,882 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:44:30,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:44:30,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:44:30,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:44:30,885 INFO L87 Difference]: Start difference. First operand 1908 states and 2785 transitions. Second operand 6 states. [2020-12-22 08:44:31,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:44:31,448 INFO L93 Difference]: Finished difference Result 3963 states and 5808 transitions. [2020-12-22 08:44:31,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 08:44:31,449 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 67 [2020-12-22 08:44:31,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:44:31,467 INFO L225 Difference]: With dead ends: 3963 [2020-12-22 08:44:31,467 INFO L226 Difference]: Without dead ends: 3429 [2020-12-22 08:44:31,473 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-12-22 08:44:31,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3429 states. [2020-12-22 08:44:31,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3429 to 2282. [2020-12-22 08:44:31,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2282 states. [2020-12-22 08:44:31,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2282 states to 2282 states and 3335 transitions. [2020-12-22 08:44:31,779 INFO L78 Accepts]: Start accepts. Automaton has 2282 states and 3335 transitions. Word has length 67 [2020-12-22 08:44:31,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:44:31,779 INFO L481 AbstractCegarLoop]: Abstraction has 2282 states and 3335 transitions. [2020-12-22 08:44:31,780 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:44:31,780 INFO L276 IsEmpty]: Start isEmpty. Operand 2282 states and 3335 transitions. [2020-12-22 08:44:31,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 08:44:31,781 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:44:31,781 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:44:31,782 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 08:44:31,782 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:44:31,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:44:31,783 INFO L82 PathProgramCache]: Analyzing trace with hash -654863315, now seen corresponding path program 1 times [2020-12-22 08:44:31,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:44:31,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354611722] [2020-12-22 08:44:31,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:44:31,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:44:32,054 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 08:44:32,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354611722] [2020-12-22 08:44:32,055 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:44:32,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 08:44:32,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578277013] [2020-12-22 08:44:32,056 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 08:44:32,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:44:32,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 08:44:32,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-12-22 08:44:32,057 INFO L87 Difference]: Start difference. First operand 2282 states and 3335 transitions. Second operand 10 states. [2020-12-22 08:44:33,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:44:33,532 INFO L93 Difference]: Finished difference Result 6789 states and 9915 transitions. [2020-12-22 08:44:33,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 08:44:33,533 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 68 [2020-12-22 08:44:33,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:44:33,558 INFO L225 Difference]: With dead ends: 6789 [2020-12-22 08:44:33,558 INFO L226 Difference]: Without dead ends: 4586 [2020-12-22 08:44:33,564 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2020-12-22 08:44:33,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4586 states. [2020-12-22 08:44:33,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4586 to 2282. [2020-12-22 08:44:33,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2282 states. [2020-12-22 08:44:33,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2282 states to 2282 states and 3333 transitions. [2020-12-22 08:44:33,990 INFO L78 Accepts]: Start accepts. Automaton has 2282 states and 3333 transitions. Word has length 68 [2020-12-22 08:44:33,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:44:33,991 INFO L481 AbstractCegarLoop]: Abstraction has 2282 states and 3333 transitions. [2020-12-22 08:44:33,991 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 08:44:33,991 INFO L276 IsEmpty]: Start isEmpty. Operand 2282 states and 3333 transitions. [2020-12-22 08:44:33,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-22 08:44:33,992 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:44:33,993 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] [2020-12-22 08:44:33,993 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 08:44:33,993 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:44:33,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:44:33,994 INFO L82 PathProgramCache]: Analyzing trace with hash 302063151, now seen corresponding path program 1 times [2020-12-22 08:44:33,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:44:33,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008587005] [2020-12-22 08:44:33,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:44:34,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:44:34,272 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 08:44:34,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008587005] [2020-12-22 08:44:34,273 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:44:34,273 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-12-22 08:44:34,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659213220] [2020-12-22 08:44:34,274 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 08:44:34,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:44:34,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 08:44:34,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-12-22 08:44:34,276 INFO L87 Difference]: Start difference. First operand 2282 states and 3333 transitions. Second operand 12 states. [2020-12-22 08:44:38,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:44:38,777 INFO L93 Difference]: Finished difference Result 22262 states and 32397 transitions. [2020-12-22 08:44:38,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-22 08:44:38,778 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 69 [2020-12-22 08:44:38,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:44:38,854 INFO L225 Difference]: With dead ends: 22262 [2020-12-22 08:44:38,854 INFO L226 Difference]: Without dead ends: 20082 [2020-12-22 08:44:38,865 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=279, Invalid=911, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 08:44:38,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20082 states. [2020-12-22 08:44:39,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20082 to 2288. [2020-12-22 08:44:39,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2288 states. [2020-12-22 08:44:39,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2288 states to 2288 states and 3339 transitions. [2020-12-22 08:44:39,619 INFO L78 Accepts]: Start accepts. Automaton has 2288 states and 3339 transitions. Word has length 69 [2020-12-22 08:44:39,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:44:39,619 INFO L481 AbstractCegarLoop]: Abstraction has 2288 states and 3339 transitions. [2020-12-22 08:44:39,619 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 08:44:39,619 INFO L276 IsEmpty]: Start isEmpty. Operand 2288 states and 3339 transitions. [2020-12-22 08:44:39,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-22 08:44:39,624 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:44:39,625 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] [2020-12-22 08:44:39,627 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 08:44:39,627 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:44:39,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:44:39,627 INFO L82 PathProgramCache]: Analyzing trace with hash 69264625, now seen corresponding path program 1 times [2020-12-22 08:44:39,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:44:39,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316182058] [2020-12-22 08:44:39,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:44:39,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:44:39,873 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 08:44:39,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316182058] [2020-12-22 08:44:39,874 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:44:39,874 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 08:44:39,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825823100] [2020-12-22 08:44:39,875 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 08:44:39,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:44:39,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 08:44:39,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-12-22 08:44:39,876 INFO L87 Difference]: Start difference. First operand 2288 states and 3339 transitions. Second operand 9 states. [2020-12-22 08:44:40,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:44:40,981 INFO L93 Difference]: Finished difference Result 5594 states and 8190 transitions. [2020-12-22 08:44:40,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 08:44:40,982 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 69 [2020-12-22 08:44:40,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:44:40,987 INFO L225 Difference]: With dead ends: 5594 [2020-12-22 08:44:40,987 INFO L226 Difference]: Without dead ends: 3383 [2020-12-22 08:44:40,991 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2020-12-22 08:44:40,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3383 states. [2020-12-22 08:44:41,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3383 to 2288. [2020-12-22 08:44:41,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2288 states. [2020-12-22 08:44:41,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2288 states to 2288 states and 3338 transitions. [2020-12-22 08:44:41,464 INFO L78 Accepts]: Start accepts. Automaton has 2288 states and 3338 transitions. Word has length 69 [2020-12-22 08:44:41,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:44:41,465 INFO L481 AbstractCegarLoop]: Abstraction has 2288 states and 3338 transitions. [2020-12-22 08:44:41,465 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 08:44:41,465 INFO L276 IsEmpty]: Start isEmpty. Operand 2288 states and 3338 transitions. [2020-12-22 08:44:41,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-22 08:44:41,466 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:44:41,466 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] [2020-12-22 08:44:41,466 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 08:44:41,466 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:44:41,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:44:41,467 INFO L82 PathProgramCache]: Analyzing trace with hash 770281693, now seen corresponding path program 1 times [2020-12-22 08:44:41,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:44:41,467 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695206372] [2020-12-22 08:44:41,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:44:41,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:44:41,658 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 08:44:41,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695206372] [2020-12-22 08:44:41,659 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:44:41,659 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 08:44:41,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111136822] [2020-12-22 08:44:41,660 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 08:44:41,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:44:41,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 08:44:41,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-12-22 08:44:41,661 INFO L87 Difference]: Start difference. First operand 2288 states and 3338 transitions. Second operand 10 states. [2020-12-22 08:44:43,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:44:43,681 INFO L93 Difference]: Finished difference Result 6774 states and 9886 transitions. [2020-12-22 08:44:43,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 08:44:43,681 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 69 [2020-12-22 08:44:43,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:44:43,694 INFO L225 Difference]: With dead ends: 6774 [2020-12-22 08:44:43,694 INFO L226 Difference]: Without dead ends: 4581 [2020-12-22 08:44:43,699 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2020-12-22 08:44:43,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4581 states. [2020-12-22 08:44:44,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4581 to 2282. [2020-12-22 08:44:44,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2282 states. [2020-12-22 08:44:44,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2282 states to 2282 states and 3328 transitions. [2020-12-22 08:44:44,380 INFO L78 Accepts]: Start accepts. Automaton has 2282 states and 3328 transitions. Word has length 69 [2020-12-22 08:44:44,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:44:44,381 INFO L481 AbstractCegarLoop]: Abstraction has 2282 states and 3328 transitions. [2020-12-22 08:44:44,381 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 08:44:44,381 INFO L276 IsEmpty]: Start isEmpty. Operand 2282 states and 3328 transitions. [2020-12-22 08:44:44,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-22 08:44:44,382 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:44:44,383 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] [2020-12-22 08:44:44,383 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 08:44:44,383 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:44:44,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:44:44,383 INFO L82 PathProgramCache]: Analyzing trace with hash -2136147335, now seen corresponding path program 1 times [2020-12-22 08:44:44,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:44:44,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870022938] [2020-12-22 08:44:44,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:44:44,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:44:44,605 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 08:44:44,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870022938] [2020-12-22 08:44:44,606 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:44:44,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 08:44:44,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244980176] [2020-12-22 08:44:44,606 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 08:44:44,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:44:44,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 08:44:44,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-12-22 08:44:44,608 INFO L87 Difference]: Start difference. First operand 2282 states and 3328 transitions. Second operand 10 states. [2020-12-22 08:44:46,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:44:46,512 INFO L93 Difference]: Finished difference Result 6740 states and 9832 transitions. [2020-12-22 08:44:46,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 08:44:46,512 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 70 [2020-12-22 08:44:46,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:44:46,522 INFO L225 Difference]: With dead ends: 6740 [2020-12-22 08:44:46,522 INFO L226 Difference]: Without dead ends: 4571 [2020-12-22 08:44:46,527 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=127, Invalid=335, Unknown=0, NotChecked=0, Total=462 [2020-12-22 08:44:46,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4571 states. [2020-12-22 08:44:47,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4571 to 2282. [2020-12-22 08:44:47,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2282 states. [2020-12-22 08:44:47,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2282 states to 2282 states and 3323 transitions. [2020-12-22 08:44:47,147 INFO L78 Accepts]: Start accepts. Automaton has 2282 states and 3323 transitions. Word has length 70 [2020-12-22 08:44:47,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:44:47,148 INFO L481 AbstractCegarLoop]: Abstraction has 2282 states and 3323 transitions. [2020-12-22 08:44:47,148 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 08:44:47,148 INFO L276 IsEmpty]: Start isEmpty. Operand 2282 states and 3323 transitions. [2020-12-22 08:44:47,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-22 08:44:47,149 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:44:47,149 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] [2020-12-22 08:44:47,149 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 08:44:47,150 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:44:47,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:44:47,150 INFO L82 PathProgramCache]: Analyzing trace with hash -425050317, now seen corresponding path program 1 times [2020-12-22 08:44:47,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:44:47,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125473863] [2020-12-22 08:44:47,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:44:47,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:44:48,762 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 08:44:48,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125473863] [2020-12-22 08:44:48,762 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:44:48,763 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2020-12-22 08:44:48,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306844377] [2020-12-22 08:44:48,763 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-22 08:44:48,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:44:48,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-22 08:44:48,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=683, Unknown=0, NotChecked=0, Total=756 [2020-12-22 08:44:48,764 INFO L87 Difference]: Start difference. First operand 2282 states and 3323 transitions. Second operand 28 states. [2020-12-22 08:44:49,164 WARN L197 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 94 [2020-12-22 08:44:49,776 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2020-12-22 08:44:49,965 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2020-12-22 08:44:50,150 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 37 [2020-12-22 08:44:50,507 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 45 [2020-12-22 08:44:50,750 WARN L197 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2020-12-22 08:44:51,050 WARN L197 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 69 [2020-12-22 08:44:51,378 WARN L197 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 80 [2020-12-22 08:44:51,796 WARN L197 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 89 [2020-12-22 08:44:52,235 WARN L197 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 95 [2020-12-22 08:44:52,769 WARN L197 SmtUtils]: Spent 438.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 107 [2020-12-22 08:44:53,111 WARN L197 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 65 [2020-12-22 08:44:53,411 WARN L197 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 65 [2020-12-22 08:44:53,712 WARN L197 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 63 [2020-12-22 08:44:54,166 WARN L197 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 65 [2020-12-22 08:44:54,496 WARN L197 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2020-12-22 08:45:00,632 WARN L197 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-12-22 08:45:03,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:45:03,906 INFO L93 Difference]: Finished difference Result 13764 states and 20179 transitions. [2020-12-22 08:45:03,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-22 08:45:03,907 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 71 [2020-12-22 08:45:03,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:45:03,931 INFO L225 Difference]: With dead ends: 13764 [2020-12-22 08:45:03,932 INFO L226 Difference]: Without dead ends: 13228 [2020-12-22 08:45:03,937 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=531, Invalid=2439, Unknown=0, NotChecked=0, Total=2970 [2020-12-22 08:45:03,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13228 states. [2020-12-22 08:45:04,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13228 to 2292. [2020-12-22 08:45:04,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2292 states. [2020-12-22 08:45:04,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2292 states to 2292 states and 3335 transitions. [2020-12-22 08:45:04,839 INFO L78 Accepts]: Start accepts. Automaton has 2292 states and 3335 transitions. Word has length 71 [2020-12-22 08:45:04,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:45:04,840 INFO L481 AbstractCegarLoop]: Abstraction has 2292 states and 3335 transitions. [2020-12-22 08:45:04,840 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-22 08:45:04,841 INFO L276 IsEmpty]: Start isEmpty. Operand 2292 states and 3335 transitions. [2020-12-22 08:45:04,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-22 08:45:04,842 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:45:04,842 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] [2020-12-22 08:45:04,843 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 08:45:04,843 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:45:04,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:45:04,844 INFO L82 PathProgramCache]: Analyzing trace with hash 1932415602, now seen corresponding path program 1 times [2020-12-22 08:45:04,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:45:04,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423320026] [2020-12-22 08:45:04,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:45:04,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:45:05,957 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 08:45:05,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423320026] [2020-12-22 08:45:05,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:45:05,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2020-12-22 08:45:05,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122372064] [2020-12-22 08:45:05,958 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-22 08:45:05,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:45:05,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-22 08:45:05,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2020-12-22 08:45:05,960 INFO L87 Difference]: Start difference. First operand 2292 states and 3335 transitions. Second operand 27 states. [2020-12-22 08:45:06,280 WARN L197 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 89 [2020-12-22 08:45:06,754 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2020-12-22 08:45:06,928 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2020-12-22 08:45:07,091 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2020-12-22 08:45:07,418 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2020-12-22 08:45:07,596 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2020-12-22 08:45:07,822 WARN L197 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-12-22 08:45:08,055 WARN L197 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2020-12-22 08:45:08,366 WARN L197 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 67 [2020-12-22 08:45:08,755 WARN L197 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 77 [2020-12-22 08:45:09,213 WARN L197 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 87 [2020-12-22 08:45:09,454 WARN L197 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-12-22 08:45:09,694 WARN L197 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-12-22 08:45:09,944 WARN L197 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2020-12-22 08:45:10,288 WARN L197 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2020-12-22 08:45:10,558 WARN L197 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2020-12-22 08:45:11,744 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2020-12-22 08:45:12,374 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2020-12-22 08:45:12,715 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 43 [2020-12-22 08:45:17,597 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 39 [2020-12-22 08:45:22,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:45:22,415 INFO L93 Difference]: Finished difference Result 19710 states and 28919 transitions. [2020-12-22 08:45:22,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-22 08:45:22,416 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 71 [2020-12-22 08:45:22,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:45:22,436 INFO L225 Difference]: With dead ends: 19710 [2020-12-22 08:45:22,436 INFO L226 Difference]: Without dead ends: 19175 [2020-12-22 08:45:22,442 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 699 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=569, Invalid=2853, Unknown=0, NotChecked=0, Total=3422 [2020-12-22 08:45:22,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19175 states. [2020-12-22 08:45:23,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19175 to 2297. [2020-12-22 08:45:23,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2297 states. [2020-12-22 08:45:23,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2297 states to 2297 states and 3341 transitions. [2020-12-22 08:45:23,584 INFO L78 Accepts]: Start accepts. Automaton has 2297 states and 3341 transitions. Word has length 71 [2020-12-22 08:45:23,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:45:23,585 INFO L481 AbstractCegarLoop]: Abstraction has 2297 states and 3341 transitions. [2020-12-22 08:45:23,585 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-22 08:45:23,585 INFO L276 IsEmpty]: Start isEmpty. Operand 2297 states and 3341 transitions. [2020-12-22 08:45:23,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-22 08:45:23,586 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:45:23,586 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] [2020-12-22 08:45:23,586 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 08:45:23,586 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:45:23,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:45:23,587 INFO L82 PathProgramCache]: Analyzing trace with hash -748125324, now seen corresponding path program 1 times [2020-12-22 08:45:23,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:45:23,587 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056799999] [2020-12-22 08:45:23,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:45:23,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:45:25,342 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 08:45:25,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056799999] [2020-12-22 08:45:25,342 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:45:25,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2020-12-22 08:45:25,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636136378] [2020-12-22 08:45:25,343 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-22 08:45:25,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:45:25,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-22 08:45:25,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2020-12-22 08:45:25,344 INFO L87 Difference]: Start difference. First operand 2297 states and 3341 transitions. Second operand 28 states. [2020-12-22 08:45:25,878 WARN L197 SmtUtils]: Spent 470.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 105 [2020-12-22 08:45:26,792 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2020-12-22 08:45:27,009 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 37 [2020-12-22 08:45:27,246 WARN L197 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 42 [2020-12-22 08:45:27,700 WARN L197 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 47 [2020-12-22 08:45:28,014 WARN L197 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 65 [2020-12-22 08:45:28,428 WARN L197 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 74 [2020-12-22 08:45:28,863 WARN L197 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 82 [2020-12-22 08:45:29,399 WARN L197 SmtUtils]: Spent 417.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 100 [2020-12-22 08:45:30,019 WARN L197 SmtUtils]: Spent 508.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 113 [2020-12-22 08:45:30,711 WARN L197 SmtUtils]: Spent 567.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 122 [2020-12-22 08:45:31,062 WARN L197 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 68 [2020-12-22 08:45:31,421 WARN L197 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 68 [2020-12-22 08:45:31,772 WARN L197 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 66 [2020-12-22 08:45:32,266 WARN L197 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 67 [2020-12-22 08:45:32,662 WARN L197 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 61 [2020-12-22 08:45:33,087 WARN L197 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 58 [2020-12-22 08:45:33,503 WARN L197 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 62 [2020-12-22 08:45:33,931 WARN L197 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 58 [2020-12-22 08:45:34,366 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 34 [2020-12-22 08:45:34,741 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 34 [2020-12-22 08:45:35,270 WARN L197 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 36 [2020-12-22 08:45:39,785 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 29 [2020-12-22 08:45:46,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:45:46,105 INFO L93 Difference]: Finished difference Result 17555 states and 25744 transitions. [2020-12-22 08:45:46,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-22 08:45:46,107 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 71 [2020-12-22 08:45:46,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:45:46,124 INFO L225 Difference]: With dead ends: 17555 [2020-12-22 08:45:46,125 INFO L226 Difference]: Without dead ends: 17019 [2020-12-22 08:45:46,131 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=664, Invalid=2642, Unknown=0, NotChecked=0, Total=3306 [2020-12-22 08:45:46,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17019 states. [2020-12-22 08:45:47,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17019 to 2297. [2020-12-22 08:45:47,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2297 states. [2020-12-22 08:45:47,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2297 states to 2297 states and 3341 transitions. [2020-12-22 08:45:47,237 INFO L78 Accepts]: Start accepts. Automaton has 2297 states and 3341 transitions. Word has length 71 [2020-12-22 08:45:47,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:45:47,237 INFO L481 AbstractCegarLoop]: Abstraction has 2297 states and 3341 transitions. [2020-12-22 08:45:47,237 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-22 08:45:47,237 INFO L276 IsEmpty]: Start isEmpty. Operand 2297 states and 3341 transitions. [2020-12-22 08:45:47,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-22 08:45:47,238 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:45:47,239 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] [2020-12-22 08:45:47,239 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 08:45:47,239 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:45:47,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:45:47,240 INFO L82 PathProgramCache]: Analyzing trace with hash 1237414452, now seen corresponding path program 1 times [2020-12-22 08:45:47,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:45:47,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533181716] [2020-12-22 08:45:47,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:45:47,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:45:48,704 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 08:45:48,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533181716] [2020-12-22 08:45:48,704 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:45:48,704 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2020-12-22 08:45:48,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286358712] [2020-12-22 08:45:48,705 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-22 08:45:48,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:45:48,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-22 08:45:48,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=585, Unknown=0, NotChecked=0, Total=650 [2020-12-22 08:45:48,706 INFO L87 Difference]: Start difference. First operand 2297 states and 3341 transitions. Second operand 26 states. [2020-12-22 08:45:49,086 WARN L197 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 81 [2020-12-22 08:45:49,678 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2020-12-22 08:45:49,877 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2020-12-22 08:45:50,067 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2020-12-22 08:45:50,475 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2020-12-22 08:45:50,731 WARN L197 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-12-22 08:45:51,063 WARN L197 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2020-12-22 08:45:51,426 WARN L197 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 72 [2020-12-22 08:45:51,875 WARN L197 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 81 [2020-12-22 08:45:52,338 WARN L197 SmtUtils]: Spent 388.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 89 [2020-12-22 08:45:52,923 WARN L197 SmtUtils]: Spent 474.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 102 [2020-12-22 08:45:53,186 WARN L197 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2020-12-22 08:45:53,459 WARN L197 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2020-12-22 08:45:53,690 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2020-12-22 08:45:55,258 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2020-12-22 08:45:55,719 WARN L197 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2020-12-22 08:46:01,913 WARN L197 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-12-22 08:46:06,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:46:06,654 INFO L93 Difference]: Finished difference Result 15580 states and 22842 transitions. [2020-12-22 08:46:06,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-22 08:46:06,655 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 71 [2020-12-22 08:46:06,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:46:06,671 INFO L225 Difference]: With dead ends: 15580 [2020-12-22 08:46:06,672 INFO L226 Difference]: Without dead ends: 14682 [2020-12-22 08:46:06,681 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=446, Invalid=2524, Unknown=0, NotChecked=0, Total=2970 [2020-12-22 08:46:06,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14682 states. [2020-12-22 08:46:07,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14682 to 2311. [2020-12-22 08:46:07,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2311 states. [2020-12-22 08:46:07,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2311 states to 2311 states and 3358 transitions. [2020-12-22 08:46:07,616 INFO L78 Accepts]: Start accepts. Automaton has 2311 states and 3358 transitions. Word has length 71 [2020-12-22 08:46:07,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:46:07,617 INFO L481 AbstractCegarLoop]: Abstraction has 2311 states and 3358 transitions. [2020-12-22 08:46:07,617 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-22 08:46:07,617 INFO L276 IsEmpty]: Start isEmpty. Operand 2311 states and 3358 transitions. [2020-12-22 08:46:07,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-22 08:46:07,618 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:46:07,618 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] [2020-12-22 08:46:07,618 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 08:46:07,619 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:46:07,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:46:07,619 INFO L82 PathProgramCache]: Analyzing trace with hash 1749525204, now seen corresponding path program 1 times [2020-12-22 08:46:07,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:46:07,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170583979] [2020-12-22 08:46:07,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:46:07,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:46:09,917 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 08:46:09,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170583979] [2020-12-22 08:46:09,918 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:46:09,918 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2020-12-22 08:46:09,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106117091] [2020-12-22 08:46:09,919 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-22 08:46:09,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:46:09,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-22 08:46:09,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2020-12-22 08:46:09,920 INFO L87 Difference]: Start difference. First operand 2311 states and 3358 transitions. Second operand 28 states. [2020-12-22 08:46:10,466 WARN L197 SmtUtils]: Spent 457.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 109 [2020-12-22 08:46:10,973 WARN L197 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2020-12-22 08:46:11,215 WARN L197 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2020-12-22 08:46:11,530 WARN L197 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2020-12-22 08:46:11,852 WARN L197 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2020-12-22 08:46:12,180 WARN L197 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2020-12-22 08:46:12,804 WARN L197 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2020-12-22 08:46:13,200 WARN L197 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 66 [2020-12-22 08:46:13,710 WARN L197 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 78 [2020-12-22 08:46:14,245 WARN L197 SmtUtils]: Spent 427.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 95 [2020-12-22 08:46:14,931 WARN L197 SmtUtils]: Spent 538.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 106 [2020-12-22 08:46:15,690 WARN L197 SmtUtils]: Spent 640.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 118 [2020-12-22 08:46:16,521 WARN L197 SmtUtils]: Spent 686.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 134 [2020-12-22 08:46:16,954 WARN L197 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 71 [2020-12-22 08:46:17,353 WARN L197 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 71 [2020-12-22 08:46:17,747 WARN L197 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2020-12-22 08:46:18,071 WARN L197 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2020-12-22 08:46:18,492 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2020-12-22 08:46:18,776 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 41 [2020-12-22 08:46:19,173 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 41 [2020-12-22 08:46:19,820 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 38 [2020-12-22 08:46:20,274 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 34 [2020-12-22 08:46:20,739 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 34 [2020-12-22 08:46:27,797 WARN L197 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2020-12-22 08:46:31,113 WARN L197 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 41 [2020-12-22 08:46:32,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:46:32,973 INFO L93 Difference]: Finished difference Result 14038 states and 20574 transitions. [2020-12-22 08:46:32,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-22 08:46:32,975 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 71 [2020-12-22 08:46:32,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:46:32,991 INFO L225 Difference]: With dead ends: 14038 [2020-12-22 08:46:32,991 INFO L226 Difference]: Without dead ends: 13502 [2020-12-22 08:46:32,995 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 628 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=532, Invalid=2890, Unknown=0, NotChecked=0, Total=3422 [2020-12-22 08:46:33,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13502 states. [2020-12-22 08:46:33,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13502 to 2317. [2020-12-22 08:46:33,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2317 states. [2020-12-22 08:46:33,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2317 states to 2317 states and 3367 transitions. [2020-12-22 08:46:33,994 INFO L78 Accepts]: Start accepts. Automaton has 2317 states and 3367 transitions. Word has length 71 [2020-12-22 08:46:33,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:46:33,995 INFO L481 AbstractCegarLoop]: Abstraction has 2317 states and 3367 transitions. [2020-12-22 08:46:33,995 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-22 08:46:33,995 INFO L276 IsEmpty]: Start isEmpty. Operand 2317 states and 3367 transitions. [2020-12-22 08:46:33,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-22 08:46:33,996 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:46:33,997 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] [2020-12-22 08:46:33,997 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 08:46:33,997 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:46:33,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:46:33,998 INFO L82 PathProgramCache]: Analyzing trace with hash -187976173, now seen corresponding path program 1 times [2020-12-22 08:46:33,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:46:33,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908771440] [2020-12-22 08:46:33,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:46:34,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:46:36,347 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 08:46:36,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908771440] [2020-12-22 08:46:36,348 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:46:36,348 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2020-12-22 08:46:36,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194086105] [2020-12-22 08:46:36,348 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-22 08:46:36,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:46:36,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-22 08:46:36,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=632, Unknown=0, NotChecked=0, Total=702 [2020-12-22 08:46:36,350 INFO L87 Difference]: Start difference. First operand 2317 states and 3367 transitions. Second operand 27 states. [2020-12-22 08:46:36,947 WARN L197 SmtUtils]: Spent 518.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 87 [2020-12-22 08:46:37,598 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 24 [2020-12-22 08:46:37,868 WARN L197 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 28 [2020-12-22 08:46:38,194 WARN L197 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 36 [2020-12-22 08:46:38,524 WARN L197 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2020-12-22 08:46:38,809 WARN L197 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 36 [2020-12-22 08:46:39,392 WARN L197 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2020-12-22 08:46:39,775 WARN L197 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 54 [2020-12-22 08:46:40,258 WARN L197 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 63 [2020-12-22 08:46:40,821 WARN L197 SmtUtils]: Spent 458.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 72 [2020-12-22 08:46:41,531 WARN L197 SmtUtils]: Spent 565.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 81 [2020-12-22 08:46:42,312 WARN L197 SmtUtils]: Spent 656.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 92 [2020-12-22 08:46:43,260 WARN L197 SmtUtils]: Spent 805.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 106 [2020-12-22 08:46:43,729 WARN L197 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 60 [2020-12-22 08:46:44,185 WARN L197 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 60 [2020-12-22 08:46:44,524 WARN L197 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2020-12-22 08:46:44,872 WARN L197 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2020-12-22 08:46:45,156 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2020-12-22 08:46:45,545 WARN L197 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2020-12-22 08:46:45,889 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2020-12-22 08:46:46,204 WARN L197 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2020-12-22 08:46:47,473 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2020-12-22 08:46:48,047 WARN L197 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2020-12-22 08:46:48,436 WARN L197 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2020-12-22 08:46:49,092 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 31 [2020-12-22 08:46:54,695 WARN L197 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 36 [2020-12-22 08:46:57,098 WARN L197 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2020-12-22 08:47:02,364 WARN L197 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 32 [2020-12-22 08:47:07,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:47:07,977 INFO L93 Difference]: Finished difference Result 29585 states and 43415 transitions. [2020-12-22 08:47:07,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-22 08:47:07,979 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 71 [2020-12-22 08:47:07,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:47:08,008 INFO L225 Difference]: With dead ends: 29585 [2020-12-22 08:47:08,008 INFO L226 Difference]: Without dead ends: 28687 [2020-12-22 08:47:08,016 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 743 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=658, Invalid=3374, Unknown=0, NotChecked=0, Total=4032 [2020-12-22 08:47:08,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28687 states. [2020-12-22 08:47:09,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28687 to 2327. [2020-12-22 08:47:09,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2327 states. [2020-12-22 08:47:09,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2327 states to 2327 states and 3379 transitions. [2020-12-22 08:47:09,070 INFO L78 Accepts]: Start accepts. Automaton has 2327 states and 3379 transitions. Word has length 71 [2020-12-22 08:47:09,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:47:09,070 INFO L481 AbstractCegarLoop]: Abstraction has 2327 states and 3379 transitions. [2020-12-22 08:47:09,070 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-22 08:47:09,071 INFO L276 IsEmpty]: Start isEmpty. Operand 2327 states and 3379 transitions. [2020-12-22 08:47:09,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-22 08:47:09,071 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:47:09,071 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] [2020-12-22 08:47:09,072 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 08:47:09,072 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:47:09,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:47:09,072 INFO L82 PathProgramCache]: Analyzing trace with hash -78323220, now seen corresponding path program 1 times [2020-12-22 08:47:09,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:47:09,072 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984126656] [2020-12-22 08:47:09,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:47:09,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:47:09,522 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2020-12-22 08:47:09,759 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2020-12-22 08:47:10,080 WARN L197 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2020-12-22 08:47:10,355 WARN L197 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2020-12-22 08:47:10,547 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2020-12-22 08:47:10,827 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 08:47:10,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984126656] [2020-12-22 08:47:10,827 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:47:10,827 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2020-12-22 08:47:10,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560244666] [2020-12-22 08:47:10,828 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 08:47:10,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:47:10,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 08:47:10,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2020-12-22 08:47:10,829 INFO L87 Difference]: Start difference. First operand 2327 states and 3379 transitions. Second operand 17 states. [2020-12-22 08:47:11,116 WARN L197 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 31 [2020-12-22 08:47:11,544 WARN L197 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 22 [2020-12-22 08:47:11,759 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 23 [2020-12-22 08:47:12,127 WARN L197 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2020-12-22 08:47:12,565 WARN L197 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2020-12-22 08:47:12,942 WARN L197 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2020-12-22 08:47:13,568 WARN L197 SmtUtils]: Spent 551.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 64 [2020-12-22 08:47:14,046 WARN L197 SmtUtils]: Spent 407.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2020-12-22 08:47:14,516 WARN L197 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2020-12-22 08:47:14,925 WARN L197 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2020-12-22 08:47:15,316 WARN L197 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-12-22 08:47:15,644 WARN L197 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2020-12-22 08:47:15,922 WARN L197 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2020-12-22 08:47:16,243 WARN L197 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2020-12-22 08:47:16,869 WARN L197 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 27 [2020-12-22 08:47:17,846 WARN L197 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2020-12-22 08:47:23,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:47:23,039 INFO L93 Difference]: Finished difference Result 10328 states and 15118 transitions. [2020-12-22 08:47:23,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 08:47:23,041 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 72 [2020-12-22 08:47:23,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:47:23,048 INFO L225 Difference]: With dead ends: 10328 [2020-12-22 08:47:23,049 INFO L226 Difference]: Without dead ends: 9398 [2020-12-22 08:47:23,051 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=282, Invalid=908, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 08:47:23,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9398 states. [2020-12-22 08:47:24,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9398 to 2312. [2020-12-22 08:47:24,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2312 states. [2020-12-22 08:47:24,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2312 states to 2312 states and 3357 transitions. [2020-12-22 08:47:24,079 INFO L78 Accepts]: Start accepts. Automaton has 2312 states and 3357 transitions. Word has length 72 [2020-12-22 08:47:24,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:47:24,079 INFO L481 AbstractCegarLoop]: Abstraction has 2312 states and 3357 transitions. [2020-12-22 08:47:24,079 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 08:47:24,079 INFO L276 IsEmpty]: Start isEmpty. Operand 2312 states and 3357 transitions. [2020-12-22 08:47:24,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-22 08:47:24,080 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:47:24,080 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] [2020-12-22 08:47:24,080 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 08:47:24,080 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:47:24,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:47:24,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1932679112, now seen corresponding path program 1 times [2020-12-22 08:47:24,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:47:24,081 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780365750] [2020-12-22 08:47:24,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:47:24,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:47:24,792 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 08:47:24,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780365750] [2020-12-22 08:47:24,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:47:24,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-12-22 08:47:24,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986206597] [2020-12-22 08:47:24,793 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 08:47:24,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:47:24,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 08:47:24,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-12-22 08:47:24,794 INFO L87 Difference]: Start difference. First operand 2312 states and 3357 transitions. Second operand 13 states. [2020-12-22 08:47:25,458 WARN L197 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 36 [2020-12-22 08:47:25,795 WARN L197 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 45 [2020-12-22 08:47:26,150 WARN L197 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 45 [2020-12-22 08:47:26,301 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-12-22 08:47:26,813 WARN L197 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 41 [2020-12-22 08:47:27,286 WARN L197 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 39 [2020-12-22 08:47:31,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:47:31,881 INFO L93 Difference]: Finished difference Result 9745 states and 14276 transitions. [2020-12-22 08:47:31,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 08:47:31,883 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 72 [2020-12-22 08:47:31,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:47:31,891 INFO L225 Difference]: With dead ends: 9745 [2020-12-22 08:47:31,891 INFO L226 Difference]: Without dead ends: 8825 [2020-12-22 08:47:31,893 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2020-12-22 08:47:31,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8825 states. [2020-12-22 08:47:33,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8825 to 2287. [2020-12-22 08:47:33,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2287 states. [2020-12-22 08:47:33,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2287 states to 2287 states and 3323 transitions. [2020-12-22 08:47:33,087 INFO L78 Accepts]: Start accepts. Automaton has 2287 states and 3323 transitions. Word has length 72 [2020-12-22 08:47:33,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:47:33,087 INFO L481 AbstractCegarLoop]: Abstraction has 2287 states and 3323 transitions. [2020-12-22 08:47:33,087 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 08:47:33,087 INFO L276 IsEmpty]: Start isEmpty. Operand 2287 states and 3323 transitions. [2020-12-22 08:47:33,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-22 08:47:33,088 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:47:33,088 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] [2020-12-22 08:47:33,088 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-12-22 08:47:33,088 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:47:33,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:47:33,089 INFO L82 PathProgramCache]: Analyzing trace with hash -4822265, now seen corresponding path program 1 times [2020-12-22 08:47:33,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:47:33,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810224688] [2020-12-22 08:47:33,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:47:33,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:47:33,439 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2020-12-22 08:47:33,690 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 22 [2020-12-22 08:47:34,369 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 08:47:34,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810224688] [2020-12-22 08:47:34,370 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:47:34,370 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-12-22 08:47:34,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266970894] [2020-12-22 08:47:34,371 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 08:47:34,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:47:34,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 08:47:34,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2020-12-22 08:47:34,372 INFO L87 Difference]: Start difference. First operand 2287 states and 3323 transitions. Second operand 16 states. [2020-12-22 08:47:34,541 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 23 [2020-12-22 08:47:34,934 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 24 [2020-12-22 08:47:35,268 WARN L197 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 23 [2020-12-22 08:47:35,565 WARN L197 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 30 [2020-12-22 08:47:36,175 WARN L197 SmtUtils]: Spent 543.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2020-12-22 08:47:36,875 WARN L197 SmtUtils]: Spent 649.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 62 [2020-12-22 08:47:37,274 WARN L197 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 36 [2020-12-22 08:47:37,647 WARN L197 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 36 [2020-12-22 08:47:37,961 WARN L197 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2020-12-22 08:47:38,544 WARN L197 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 29 [2020-12-22 08:47:39,593 WARN L197 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2020-12-22 08:47:45,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:47:45,821 INFO L93 Difference]: Finished difference Result 10720 states and 15745 transitions. [2020-12-22 08:47:45,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-22 08:47:45,823 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 72 [2020-12-22 08:47:45,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:47:45,832 INFO L225 Difference]: With dead ends: 10720 [2020-12-22 08:47:45,833 INFO L226 Difference]: Without dead ends: 9822 [2020-12-22 08:47:45,835 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=209, Invalid=721, Unknown=0, NotChecked=0, Total=930 [2020-12-22 08:47:45,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9822 states. [2020-12-22 08:47:47,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9822 to 2279. [2020-12-22 08:47:47,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2279 states. [2020-12-22 08:47:47,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2279 states to 2279 states and 3312 transitions. [2020-12-22 08:47:47,070 INFO L78 Accepts]: Start accepts. Automaton has 2279 states and 3312 transitions. Word has length 72 [2020-12-22 08:47:47,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:47:47,071 INFO L481 AbstractCegarLoop]: Abstraction has 2279 states and 3312 transitions. [2020-12-22 08:47:47,071 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 08:47:47,071 INFO L276 IsEmpty]: Start isEmpty. Operand 2279 states and 3312 transitions. [2020-12-22 08:47:47,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-22 08:47:47,071 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:47:47,072 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] [2020-12-22 08:47:47,072 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-12-22 08:47:47,072 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:47:47,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:47:47,072 INFO L82 PathProgramCache]: Analyzing trace with hash -1545437633, now seen corresponding path program 1 times [2020-12-22 08:47:47,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:47:47,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81864932] [2020-12-22 08:47:47,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:47:47,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:47:47,210 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 08:47:47,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81864932] [2020-12-22 08:47:47,210 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:47:47,211 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:47:47,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244503505] [2020-12-22 08:47:47,211 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:47:47,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:47:47,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:47:47,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:47:47,212 INFO L87 Difference]: Start difference. First operand 2279 states and 3312 transitions. Second operand 4 states. [2020-12-22 08:47:49,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:47:49,251 INFO L93 Difference]: Finished difference Result 5497 states and 8048 transitions. [2020-12-22 08:47:49,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:47:49,253 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 72 [2020-12-22 08:47:49,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:47:49,257 INFO L225 Difference]: With dead ends: 5497 [2020-12-22 08:47:49,257 INFO L226 Difference]: Without dead ends: 3333 [2020-12-22 08:47:49,259 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 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 08:47:49,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3333 states. [2020-12-22 08:47:50,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3333 to 3307. [2020-12-22 08:47:50,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3307 states. [2020-12-22 08:47:50,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3307 states to 3307 states and 4784 transitions. [2020-12-22 08:47:50,974 INFO L78 Accepts]: Start accepts. Automaton has 3307 states and 4784 transitions. Word has length 72 [2020-12-22 08:47:50,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:47:50,975 INFO L481 AbstractCegarLoop]: Abstraction has 3307 states and 4784 transitions. [2020-12-22 08:47:50,975 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:47:50,975 INFO L276 IsEmpty]: Start isEmpty. Operand 3307 states and 4784 transitions. [2020-12-22 08:47:50,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-22 08:47:50,975 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:47:50,975 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] [2020-12-22 08:47:50,976 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-12-22 08:47:50,976 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:47:50,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:47:50,976 INFO L82 PathProgramCache]: Analyzing trace with hash -654506813, now seen corresponding path program 1 times [2020-12-22 08:47:50,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:47:50,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102111418] [2020-12-22 08:47:50,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:47:50,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:47:51,089 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 08:47:51,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102111418] [2020-12-22 08:47:51,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:47:51,090 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:47:51,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696781060] [2020-12-22 08:47:51,093 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:47:51,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:47:51,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:47:51,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:47:51,094 INFO L87 Difference]: Start difference. First operand 3307 states and 4784 transitions. Second operand 5 states. [2020-12-22 08:47:53,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:47:53,847 INFO L93 Difference]: Finished difference Result 5020 states and 7262 transitions. [2020-12-22 08:47:53,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 08:47:53,848 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 72 [2020-12-22 08:47:53,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:47:53,853 INFO L225 Difference]: With dead ends: 5020 [2020-12-22 08:47:53,853 INFO L226 Difference]: Without dead ends: 5018 [2020-12-22 08:47:53,854 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:47:53,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5018 states. [2020-12-22 08:47:55,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5018 to 3327. [2020-12-22 08:47:55,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3327 states. [2020-12-22 08:47:55,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3327 states to 3327 states and 4780 transitions. [2020-12-22 08:47:55,586 INFO L78 Accepts]: Start accepts. Automaton has 3327 states and 4780 transitions. Word has length 72 [2020-12-22 08:47:55,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:47:55,586 INFO L481 AbstractCegarLoop]: Abstraction has 3327 states and 4780 transitions. [2020-12-22 08:47:55,586 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:47:55,586 INFO L276 IsEmpty]: Start isEmpty. Operand 3327 states and 4780 transitions. [2020-12-22 08:47:55,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-22 08:47:55,587 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:47:55,587 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] [2020-12-22 08:47:55,587 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-12-22 08:47:55,587 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:47:55,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:47:55,588 INFO L82 PathProgramCache]: Analyzing trace with hash 1392166567, now seen corresponding path program 1 times [2020-12-22 08:47:55,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:47:55,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536592611] [2020-12-22 08:47:55,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:47:55,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:47:56,363 WARN L197 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2020-12-22 08:47:56,659 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 28 [2020-12-22 08:47:57,128 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 08:47:57,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536592611] [2020-12-22 08:47:57,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:47:57,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2020-12-22 08:47:57,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517536100] [2020-12-22 08:47:57,131 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 08:47:57,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:47:57,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 08:47:57,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2020-12-22 08:47:57,132 INFO L87 Difference]: Start difference. First operand 3327 states and 4780 transitions. Second operand 18 states. [2020-12-22 08:47:57,341 WARN L197 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2020-12-22 08:47:57,622 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2020-12-22 08:47:57,786 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2020-12-22 08:47:57,990 WARN L197 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 29 [2020-12-22 08:47:58,204 WARN L197 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 34 [2020-12-22 08:47:58,450 WARN L197 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2020-12-22 08:47:58,972 WARN L197 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2020-12-22 08:47:59,432 WARN L197 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 67 [2020-12-22 08:48:00,019 WARN L197 SmtUtils]: Spent 495.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 75 [2020-12-22 08:48:00,502 WARN L197 SmtUtils]: Spent 422.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 67 [2020-12-22 08:48:00,985 WARN L197 SmtUtils]: Spent 420.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 67 [2020-12-22 08:48:01,411 WARN L197 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2020-12-22 08:48:01,951 WARN L197 SmtUtils]: Spent 491.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 75 [2020-12-22 08:48:02,245 WARN L197 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2020-12-22 08:48:02,687 WARN L197 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2020-12-22 08:48:03,157 WARN L197 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2020-12-22 08:48:03,568 WARN L197 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 57 [2020-12-22 08:48:03,920 WARN L197 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 51 [2020-12-22 08:48:04,912 WARN L197 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2020-12-22 08:48:05,792 WARN L197 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 48 [2020-12-22 08:48:06,190 WARN L197 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 45 [2020-12-22 08:48:18,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:48:18,382 INFO L93 Difference]: Finished difference Result 21504 states and 31072 transitions. [2020-12-22 08:48:18,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-22 08:48:18,384 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 72 [2020-12-22 08:48:18,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:48:18,403 INFO L225 Difference]: With dead ends: 21504 [2020-12-22 08:48:18,403 INFO L226 Difference]: Without dead ends: 20157 [2020-12-22 08:48:18,407 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=379, Invalid=1343, Unknown=0, NotChecked=0, Total=1722 [2020-12-22 08:48:18,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20157 states. [2020-12-22 08:48:20,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20157 to 3332. [2020-12-22 08:48:20,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3332 states. [2020-12-22 08:48:20,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3332 states to 3332 states and 4786 transitions. [2020-12-22 08:48:20,389 INFO L78 Accepts]: Start accepts. Automaton has 3332 states and 4786 transitions. Word has length 72 [2020-12-22 08:48:20,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:48:20,389 INFO L481 AbstractCegarLoop]: Abstraction has 3332 states and 4786 transitions. [2020-12-22 08:48:20,389 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 08:48:20,389 INFO L276 IsEmpty]: Start isEmpty. Operand 3332 states and 4786 transitions. [2020-12-22 08:48:20,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-12-22 08:48:20,390 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:48:20,390 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] [2020-12-22 08:48:20,390 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-12-22 08:48:20,390 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:48:20,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:48:20,391 INFO L82 PathProgramCache]: Analyzing trace with hash -1519996877, now seen corresponding path program 1 times [2020-12-22 08:48:20,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:48:20,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083858884] [2020-12-22 08:48:20,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:48:20,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:48:20,923 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-12-22 08:48:21,178 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 08:48:21,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083858884] [2020-12-22 08:48:21,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:48:21,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-12-22 08:48:21,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273887231] [2020-12-22 08:48:21,179 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 08:48:21,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:48:21,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 08:48:21,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-12-22 08:48:21,180 INFO L87 Difference]: Start difference. First operand 3332 states and 4786 transitions. Second operand 12 states. [2020-12-22 08:48:21,384 WARN L197 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2020-12-22 08:48:21,565 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2020-12-22 08:48:21,728 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 26 [2020-12-22 08:48:21,964 WARN L197 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 29 [2020-12-22 08:48:22,349 WARN L197 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 50 [2020-12-22 08:48:22,735 WARN L197 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2020-12-22 08:48:23,143 WARN L197 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2020-12-22 08:48:23,309 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-12-22 08:48:23,484 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-12-22 08:48:23,883 WARN L197 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2020-12-22 08:48:24,285 WARN L197 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2020-12-22 08:48:24,423 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-12-22 08:48:24,809 WARN L197 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 53 [2020-12-22 08:48:26,774 WARN L197 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54