/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/seq-mthreaded/pals_lcr.6.ufo.UNBOUNDED.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 07:35:57,979 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 07:35:57,983 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 07:35:58,026 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 07:35:58,026 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 07:35:58,028 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 07:35:58,030 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 07:35:58,032 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 07:35:58,034 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 07:35:58,035 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 07:35:58,036 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 07:35:58,038 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 07:35:58,038 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 07:35:58,039 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 07:35:58,041 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 07:35:58,042 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 07:35:58,043 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 07:35:58,056 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 07:35:58,059 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 07:35:58,061 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 07:35:58,063 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 07:35:58,065 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 07:35:58,066 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 07:35:58,067 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 07:35:58,070 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 07:35:58,079 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 07:35:58,081 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 07:35:58,081 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 07:35:58,082 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 07:35:58,119 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 07:35:58,119 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 07:35:58,121 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 07:35:58,121 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 07:35:58,122 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 07:35:58,123 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 07:35:58,124 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 07:35:58,124 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 07:35:58,124 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 07:35:58,124 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 07:35:58,125 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 07:35:58,126 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 07:35:58,126 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 07:35:58,126 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 07:35:58,126 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 07:35:58,127 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 07:35:58,127 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 07:35:58,127 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 07:35:58,127 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 07:35:58,128 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 07:35:58,128 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 07:35:58,128 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 07:35:58,128 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 07:35:58,128 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 07:35:58,129 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 07:35:58,129 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 07:35:58,480 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 07:35:58,508 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 07:35:58,511 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 07:35:58,513 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 07:35:58,513 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 07:35:58,514 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_lcr.6.ufo.UNBOUNDED.pals.c [2020-12-22 07:35:58,602 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f9835899/11dd051a94be4240a2b1fdd404192c56/FLAGeaa8ceddd [2020-12-22 07:35:59,350 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 07:35:59,351 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr.6.ufo.UNBOUNDED.pals.c [2020-12-22 07:35:59,371 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f9835899/11dd051a94be4240a2b1fdd404192c56/FLAGeaa8ceddd [2020-12-22 07:35:59,634 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f9835899/11dd051a94be4240a2b1fdd404192c56 [2020-12-22 07:35:59,639 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 07:35:59,642 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 07:35:59,644 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 07:35:59,644 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 07:35:59,648 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 07:35:59,649 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:35:59" (1/1) ... [2020-12-22 07:35:59,651 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34c378f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:35:59, skipping insertion in model container [2020-12-22 07:35:59,651 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:35:59" (1/1) ... [2020-12-22 07:35:59,662 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 07:35:59,721 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 07:35:59,992 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr.6.ufo.UNBOUNDED.pals.c[15103,15116] [2020-12-22 07:35:59,998 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:36:00,009 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 07:36:00,097 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr.6.ufo.UNBOUNDED.pals.c[15103,15116] [2020-12-22 07:36:00,098 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:36:00,141 INFO L208 MainTranslator]: Completed translation [2020-12-22 07:36:00,142 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:36:00 WrapperNode [2020-12-22 07:36:00,142 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 07:36:00,145 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 07:36:00,145 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 07:36:00,146 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 07:36:00,155 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:36:00" (1/1) ... [2020-12-22 07:36:00,183 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:36:00" (1/1) ... [2020-12-22 07:36:00,254 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 07:36:00,255 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 07:36:00,255 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 07:36:00,256 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 07:36:00,268 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:36:00" (1/1) ... [2020-12-22 07:36:00,269 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:36:00" (1/1) ... [2020-12-22 07:36:00,272 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:36:00" (1/1) ... [2020-12-22 07:36:00,273 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:36:00" (1/1) ... [2020-12-22 07:36:00,282 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:36:00" (1/1) ... [2020-12-22 07:36:00,295 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:36:00" (1/1) ... [2020-12-22 07:36:00,299 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:36:00" (1/1) ... [2020-12-22 07:36:00,304 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 07:36:00,306 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 07:36:00,306 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 07:36:00,306 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 07:36:00,307 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:36:00" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 07:36:00,432 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 07:36:00,432 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 07:36:00,432 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 07:36:00,432 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 07:36:01,431 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 07:36:01,432 INFO L299 CfgBuilder]: Removed 25 assume(true) statements. [2020-12-22 07:36:01,435 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:36:01 BoogieIcfgContainer [2020-12-22 07:36:01,435 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 07:36:01,437 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 07:36:01,437 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 07:36:01,441 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 07:36:01,441 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 07:35:59" (1/3) ... [2020-12-22 07:36:01,442 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37075d93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:36:01, skipping insertion in model container [2020-12-22 07:36:01,442 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:36:00" (2/3) ... [2020-12-22 07:36:01,443 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37075d93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:36:01, skipping insertion in model container [2020-12-22 07:36:01,443 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:36:01" (3/3) ... [2020-12-22 07:36:01,444 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.6.ufo.UNBOUNDED.pals.c [2020-12-22 07:36:01,451 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 07:36:01,456 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 07:36:01,474 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 07:36:01,502 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 07:36:01,502 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 07:36:01,502 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 07:36:01,502 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 07:36:01,503 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 07:36:01,503 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 07:36:01,503 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 07:36:01,503 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 07:36:01,521 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states. [2020-12-22 07:36:01,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-22 07:36:01,529 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:36:01,530 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] [2020-12-22 07:36:01,531 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:36:01,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:36:01,537 INFO L82 PathProgramCache]: Analyzing trace with hash -606038097, now seen corresponding path program 1 times [2020-12-22 07:36:01,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:36:01,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020292561] [2020-12-22 07:36:01,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:36:01,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:36:01,880 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 07:36:01,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020292561] [2020-12-22 07:36:01,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:36:01,883 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:36:01,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532716574] [2020-12-22 07:36:01,889 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 07:36:01,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:36:01,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 07:36:01,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 07:36:01,912 INFO L87 Difference]: Start difference. First operand 111 states. Second operand 2 states. [2020-12-22 07:36:01,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:36:01,964 INFO L93 Difference]: Finished difference Result 173 states and 291 transitions. [2020-12-22 07:36:01,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 07:36:01,967 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 37 [2020-12-22 07:36:01,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:36:01,990 INFO L225 Difference]: With dead ends: 173 [2020-12-22 07:36:01,990 INFO L226 Difference]: Without dead ends: 107 [2020-12-22 07:36:01,993 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 07:36:02,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-12-22 07:36:02,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2020-12-22 07:36:02,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-12-22 07:36:02,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 183 transitions. [2020-12-22 07:36:02,045 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 183 transitions. Word has length 37 [2020-12-22 07:36:02,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:36:02,046 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 183 transitions. [2020-12-22 07:36:02,046 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 07:36:02,046 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 183 transitions. [2020-12-22 07:36:02,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-22 07:36:02,048 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:36:02,049 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] [2020-12-22 07:36:02,049 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 07:36:02,049 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:36:02,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:36:02,050 INFO L82 PathProgramCache]: Analyzing trace with hash -331278483, now seen corresponding path program 1 times [2020-12-22 07:36:02,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:36:02,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308609917] [2020-12-22 07:36:02,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:36:02,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:36:02,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:36:02,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308609917] [2020-12-22 07:36:02,154 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:36:02,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:36:02,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450642344] [2020-12-22 07:36:02,156 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:36:02,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:36:02,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:36:02,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:36:02,158 INFO L87 Difference]: Start difference. First operand 107 states and 183 transitions. Second operand 5 states. [2020-12-22 07:36:02,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:36:02,296 INFO L93 Difference]: Finished difference Result 172 states and 284 transitions. [2020-12-22 07:36:02,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 07:36:02,296 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 37 [2020-12-22 07:36:02,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:36:02,300 INFO L225 Difference]: With dead ends: 172 [2020-12-22 07:36:02,300 INFO L226 Difference]: Without dead ends: 107 [2020-12-22 07:36:02,301 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:36:02,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-12-22 07:36:02,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2020-12-22 07:36:02,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-12-22 07:36:02,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 143 transitions. [2020-12-22 07:36:02,313 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 143 transitions. Word has length 37 [2020-12-22 07:36:02,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:36:02,313 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 143 transitions. [2020-12-22 07:36:02,314 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:36:02,314 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 143 transitions. [2020-12-22 07:36:02,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-22 07:36:02,316 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:36:02,317 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:36:02,317 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 07:36:02,317 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:36:02,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:36:02,318 INFO L82 PathProgramCache]: Analyzing trace with hash 85749534, now seen corresponding path program 1 times [2020-12-22 07:36:02,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:36:02,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771609188] [2020-12-22 07:36:02,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:36:02,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:36:02,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:36:02,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771609188] [2020-12-22 07:36:02,553 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:36:02,554 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:36:02,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367679225] [2020-12-22 07:36:02,555 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:36:02,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:36:02,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:36:02,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:36:02,556 INFO L87 Difference]: Start difference. First operand 107 states and 143 transitions. Second operand 3 states. [2020-12-22 07:36:02,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:36:02,584 INFO L93 Difference]: Finished difference Result 223 states and 327 transitions. [2020-12-22 07:36:02,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:36:02,585 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 76 [2020-12-22 07:36:02,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:36:02,587 INFO L225 Difference]: With dead ends: 223 [2020-12-22 07:36:02,588 INFO L226 Difference]: Without dead ends: 162 [2020-12-22 07:36:02,589 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:36:02,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-12-22 07:36:02,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 160. [2020-12-22 07:36:02,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-12-22 07:36:02,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 228 transitions. [2020-12-22 07:36:02,604 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 228 transitions. Word has length 76 [2020-12-22 07:36:02,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:36:02,605 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 228 transitions. [2020-12-22 07:36:02,605 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:36:02,605 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 228 transitions. [2020-12-22 07:36:02,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-22 07:36:02,608 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:36:02,608 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:36:02,609 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 07:36:02,609 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:36:02,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:36:02,610 INFO L82 PathProgramCache]: Analyzing trace with hash -659833196, now seen corresponding path program 1 times [2020-12-22 07:36:02,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:36:02,610 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134596936] [2020-12-22 07:36:02,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:36:02,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:36:02,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:36:02,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134596936] [2020-12-22 07:36:02,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:36:02,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:36:02,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643824979] [2020-12-22 07:36:02,787 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:36:02,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:36:02,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:36:02,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:36:02,792 INFO L87 Difference]: Start difference. First operand 160 states and 228 transitions. Second operand 3 states. [2020-12-22 07:36:02,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:36:02,823 INFO L93 Difference]: Finished difference Result 376 states and 572 transitions. [2020-12-22 07:36:02,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:36:02,823 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 76 [2020-12-22 07:36:02,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:36:02,826 INFO L225 Difference]: With dead ends: 376 [2020-12-22 07:36:02,827 INFO L226 Difference]: Without dead ends: 262 [2020-12-22 07:36:02,828 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:36:02,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-12-22 07:36:02,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 260. [2020-12-22 07:36:02,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2020-12-22 07:36:02,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 387 transitions. [2020-12-22 07:36:02,850 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 387 transitions. Word has length 76 [2020-12-22 07:36:02,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:36:02,851 INFO L481 AbstractCegarLoop]: Abstraction has 260 states and 387 transitions. [2020-12-22 07:36:02,851 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:36:02,851 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 387 transitions. [2020-12-22 07:36:02,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-22 07:36:02,853 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:36:02,853 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:36:02,853 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 07:36:02,853 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:36:02,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:36:02,854 INFO L82 PathProgramCache]: Analyzing trace with hash 1695103242, now seen corresponding path program 1 times [2020-12-22 07:36:02,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:36:02,855 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171287840] [2020-12-22 07:36:02,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:36:02,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:36:02,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:36:02,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171287840] [2020-12-22 07:36:02,943 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:36:02,943 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:36:02,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104978880] [2020-12-22 07:36:02,945 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:36:02,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:36:02,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:36:02,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:36:02,947 INFO L87 Difference]: Start difference. First operand 260 states and 387 transitions. Second operand 3 states. [2020-12-22 07:36:03,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:36:03,012 INFO L93 Difference]: Finished difference Result 664 states and 1029 transitions. [2020-12-22 07:36:03,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:36:03,013 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 76 [2020-12-22 07:36:03,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:36:03,018 INFO L225 Difference]: With dead ends: 664 [2020-12-22 07:36:03,018 INFO L226 Difference]: Without dead ends: 450 [2020-12-22 07:36:03,021 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:36:03,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2020-12-22 07:36:03,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 448. [2020-12-22 07:36:03,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 448 states. [2020-12-22 07:36:03,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 683 transitions. [2020-12-22 07:36:03,081 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 683 transitions. Word has length 76 [2020-12-22 07:36:03,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:36:03,082 INFO L481 AbstractCegarLoop]: Abstraction has 448 states and 683 transitions. [2020-12-22 07:36:03,082 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:36:03,082 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 683 transitions. [2020-12-22 07:36:03,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-22 07:36:03,083 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:36:03,084 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:36:03,084 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 07:36:03,084 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:36:03,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:36:03,085 INFO L82 PathProgramCache]: Analyzing trace with hash 100818560, now seen corresponding path program 1 times [2020-12-22 07:36:03,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:36:03,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779334471] [2020-12-22 07:36:03,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:36:03,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:36:03,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:36:03,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779334471] [2020-12-22 07:36:03,162 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:36:03,163 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:36:03,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729083650] [2020-12-22 07:36:03,163 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:36:03,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:36:03,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:36:03,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:36:03,165 INFO L87 Difference]: Start difference. First operand 448 states and 683 transitions. Second operand 3 states. [2020-12-22 07:36:03,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:36:03,210 INFO L93 Difference]: Finished difference Result 1204 states and 1877 transitions. [2020-12-22 07:36:03,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:36:03,211 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 76 [2020-12-22 07:36:03,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:36:03,218 INFO L225 Difference]: With dead ends: 1204 [2020-12-22 07:36:03,219 INFO L226 Difference]: Without dead ends: 802 [2020-12-22 07:36:03,220 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:36:03,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 802 states. [2020-12-22 07:36:03,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 802 to 800. [2020-12-22 07:36:03,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 800 states. [2020-12-22 07:36:03,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 1231 transitions. [2020-12-22 07:36:03,290 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 1231 transitions. Word has length 76 [2020-12-22 07:36:03,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:36:03,290 INFO L481 AbstractCegarLoop]: Abstraction has 800 states and 1231 transitions. [2020-12-22 07:36:03,290 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:36:03,290 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 1231 transitions. [2020-12-22 07:36:03,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-22 07:36:03,292 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:36:03,292 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:36:03,292 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 07:36:03,292 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:36:03,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:36:03,293 INFO L82 PathProgramCache]: Analyzing trace with hash 438611702, now seen corresponding path program 1 times [2020-12-22 07:36:03,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:36:03,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360866713] [2020-12-22 07:36:03,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:36:03,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:36:03,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:36:03,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360866713] [2020-12-22 07:36:03,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:36:03,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:36:03,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309952215] [2020-12-22 07:36:03,362 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:36:03,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:36:03,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:36:03,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:36:03,364 INFO L87 Difference]: Start difference. First operand 800 states and 1231 transitions. Second operand 3 states. [2020-12-22 07:36:03,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:36:03,421 INFO L93 Difference]: Finished difference Result 2212 states and 3441 transitions. [2020-12-22 07:36:03,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:36:03,422 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 76 [2020-12-22 07:36:03,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:36:03,430 INFO L225 Difference]: With dead ends: 2212 [2020-12-22 07:36:03,430 INFO L226 Difference]: Without dead ends: 1458 [2020-12-22 07:36:03,432 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:36:03,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1458 states. [2020-12-22 07:36:03,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1458 to 1456. [2020-12-22 07:36:03,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1456 states. [2020-12-22 07:36:03,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1456 states to 1456 states and 2239 transitions. [2020-12-22 07:36:03,492 INFO L78 Accepts]: Start accepts. Automaton has 1456 states and 2239 transitions. Word has length 76 [2020-12-22 07:36:03,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:36:03,492 INFO L481 AbstractCegarLoop]: Abstraction has 1456 states and 2239 transitions. [2020-12-22 07:36:03,492 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:36:03,492 INFO L276 IsEmpty]: Start isEmpty. Operand 1456 states and 2239 transitions. [2020-12-22 07:36:03,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-22 07:36:03,493 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:36:03,494 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:36:03,494 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 07:36:03,494 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:36:03,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:36:03,495 INFO L82 PathProgramCache]: Analyzing trace with hash 1656597100, now seen corresponding path program 1 times [2020-12-22 07:36:03,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:36:03,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329806934] [2020-12-22 07:36:03,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:36:03,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:36:03,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:36:03,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329806934] [2020-12-22 07:36:03,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:36:03,665 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 07:36:03,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164618631] [2020-12-22 07:36:03,666 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 07:36:03,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:36:03,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 07:36:03,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 07:36:03,667 INFO L87 Difference]: Start difference. First operand 1456 states and 2239 transitions. Second operand 8 states. [2020-12-22 07:36:04,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:36:04,850 INFO L93 Difference]: Finished difference Result 18376 states and 28555 transitions. [2020-12-22 07:36:04,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 07:36:04,851 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 76 [2020-12-22 07:36:04,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:36:04,976 INFO L225 Difference]: With dead ends: 18376 [2020-12-22 07:36:04,976 INFO L226 Difference]: Without dead ends: 16966 [2020-12-22 07:36:04,982 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2020-12-22 07:36:05,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16966 states. [2020-12-22 07:36:05,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16966 to 2864. [2020-12-22 07:36:05,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2864 states. [2020-12-22 07:36:05,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2864 states to 2864 states and 4367 transitions. [2020-12-22 07:36:05,329 INFO L78 Accepts]: Start accepts. Automaton has 2864 states and 4367 transitions. Word has length 76 [2020-12-22 07:36:05,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:36:05,330 INFO L481 AbstractCegarLoop]: Abstraction has 2864 states and 4367 transitions. [2020-12-22 07:36:05,330 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 07:36:05,330 INFO L276 IsEmpty]: Start isEmpty. Operand 2864 states and 4367 transitions. [2020-12-22 07:36:05,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 07:36:05,331 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:36:05,331 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:36:05,331 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 07:36:05,331 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:36:05,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:36:05,332 INFO L82 PathProgramCache]: Analyzing trace with hash 1436220828, now seen corresponding path program 1 times [2020-12-22 07:36:05,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:36:05,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097950764] [2020-12-22 07:36:05,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:36:05,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:36:05,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:36:05,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097950764] [2020-12-22 07:36:05,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:36:05,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:36:05,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121805872] [2020-12-22 07:36:05,407 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:36:05,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:36:05,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:36:05,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:36:05,408 INFO L87 Difference]: Start difference. First operand 2864 states and 4367 transitions. Second operand 3 states. [2020-12-22 07:36:05,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:36:05,771 INFO L93 Difference]: Finished difference Result 8148 states and 12401 transitions. [2020-12-22 07:36:05,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:36:05,772 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 78 [2020-12-22 07:36:05,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:36:05,798 INFO L225 Difference]: With dead ends: 8148 [2020-12-22 07:36:05,798 INFO L226 Difference]: Without dead ends: 5330 [2020-12-22 07:36:05,803 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:36:05,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5330 states. [2020-12-22 07:36:06,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5330 to 5264. [2020-12-22 07:36:06,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5264 states. [2020-12-22 07:36:06,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5264 states to 5264 states and 7855 transitions. [2020-12-22 07:36:06,227 INFO L78 Accepts]: Start accepts. Automaton has 5264 states and 7855 transitions. Word has length 78 [2020-12-22 07:36:06,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:36:06,228 INFO L481 AbstractCegarLoop]: Abstraction has 5264 states and 7855 transitions. [2020-12-22 07:36:06,228 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:36:06,228 INFO L276 IsEmpty]: Start isEmpty. Operand 5264 states and 7855 transitions. [2020-12-22 07:36:06,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 07:36:06,229 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:36:06,229 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:36:06,229 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 07:36:06,229 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:36:06,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:36:06,230 INFO L82 PathProgramCache]: Analyzing trace with hash 1502714340, now seen corresponding path program 1 times [2020-12-22 07:36:06,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:36:06,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758412145] [2020-12-22 07:36:06,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:36:06,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:36:06,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:36:06,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758412145] [2020-12-22 07:36:06,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:36:06,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 07:36:06,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258799924] [2020-12-22 07:36:06,669 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 07:36:06,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:36:06,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 07:36:06,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-12-22 07:36:06,671 INFO L87 Difference]: Start difference. First operand 5264 states and 7855 transitions. Second operand 8 states. [2020-12-22 07:36:07,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:36:07,591 INFO L93 Difference]: Finished difference Result 13078 states and 19602 transitions. [2020-12-22 07:36:07,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 07:36:07,592 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 78 [2020-12-22 07:36:07,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:36:07,630 INFO L225 Difference]: With dead ends: 13078 [2020-12-22 07:36:07,631 INFO L226 Difference]: Without dead ends: 7860 [2020-12-22 07:36:07,639 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2020-12-22 07:36:07,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7860 states. [2020-12-22 07:36:08,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7860 to 5264. [2020-12-22 07:36:08,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5264 states. [2020-12-22 07:36:08,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5264 states to 5264 states and 7791 transitions. [2020-12-22 07:36:08,142 INFO L78 Accepts]: Start accepts. Automaton has 5264 states and 7791 transitions. Word has length 78 [2020-12-22 07:36:08,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:36:08,142 INFO L481 AbstractCegarLoop]: Abstraction has 5264 states and 7791 transitions. [2020-12-22 07:36:08,142 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 07:36:08,143 INFO L276 IsEmpty]: Start isEmpty. Operand 5264 states and 7791 transitions. [2020-12-22 07:36:08,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 07:36:08,143 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:36:08,144 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:36:08,144 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 07:36:08,144 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:36:08,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:36:08,145 INFO L82 PathProgramCache]: Analyzing trace with hash -1075218669, now seen corresponding path program 1 times [2020-12-22 07:36:08,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:36:08,145 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753699693] [2020-12-22 07:36:08,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:36:08,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:36:08,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:36:08,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753699693] [2020-12-22 07:36:08,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:36:08,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 07:36:08,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617113308] [2020-12-22 07:36:08,261 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 07:36:08,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:36:08,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 07:36:08,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 07:36:08,263 INFO L87 Difference]: Start difference. First operand 5264 states and 7791 transitions. Second operand 8 states. [2020-12-22 07:36:09,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:36:09,054 INFO L93 Difference]: Finished difference Result 9170 states and 13482 transitions. [2020-12-22 07:36:09,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 07:36:09,055 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 79 [2020-12-22 07:36:09,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:36:09,074 INFO L225 Difference]: With dead ends: 9170 [2020-12-22 07:36:09,075 INFO L226 Difference]: Without dead ends: 9168 [2020-12-22 07:36:09,078 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-12-22 07:36:09,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9168 states. [2020-12-22 07:36:09,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9168 to 5456. [2020-12-22 07:36:09,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5456 states. [2020-12-22 07:36:09,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5456 states to 5456 states and 7951 transitions. [2020-12-22 07:36:09,612 INFO L78 Accepts]: Start accepts. Automaton has 5456 states and 7951 transitions. Word has length 79 [2020-12-22 07:36:09,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:36:09,612 INFO L481 AbstractCegarLoop]: Abstraction has 5456 states and 7951 transitions. [2020-12-22 07:36:09,612 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 07:36:09,612 INFO L276 IsEmpty]: Start isEmpty. Operand 5456 states and 7951 transitions. [2020-12-22 07:36:09,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 07:36:09,613 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:36:09,613 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:36:09,614 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 07:36:09,614 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:36:09,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:36:09,614 INFO L82 PathProgramCache]: Analyzing trace with hash 809566587, now seen corresponding path program 1 times [2020-12-22 07:36:09,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:36:09,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147599559] [2020-12-22 07:36:09,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:36:09,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:36:09,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:36:09,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147599559] [2020-12-22 07:36:09,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:36:09,678 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:36:09,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811438825] [2020-12-22 07:36:09,678 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:36:09,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:36:09,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:36:09,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:36:09,680 INFO L87 Difference]: Start difference. First operand 5456 states and 7951 transitions. Second operand 3 states. [2020-12-22 07:36:10,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:36:10,385 INFO L93 Difference]: Finished difference Result 10967 states and 16085 transitions. [2020-12-22 07:36:10,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:36:10,387 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 80 [2020-12-22 07:36:10,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:36:10,403 INFO L225 Difference]: With dead ends: 10967 [2020-12-22 07:36:10,404 INFO L226 Difference]: Without dead ends: 7956 [2020-12-22 07:36:10,409 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:36:10,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7956 states. [2020-12-22 07:36:11,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7956 to 7954. [2020-12-22 07:36:11,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7954 states. [2020-12-22 07:36:11,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7954 states to 7954 states and 11537 transitions. [2020-12-22 07:36:11,112 INFO L78 Accepts]: Start accepts. Automaton has 7954 states and 11537 transitions. Word has length 80 [2020-12-22 07:36:11,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:36:11,112 INFO L481 AbstractCegarLoop]: Abstraction has 7954 states and 11537 transitions. [2020-12-22 07:36:11,112 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:36:11,112 INFO L276 IsEmpty]: Start isEmpty. Operand 7954 states and 11537 transitions. [2020-12-22 07:36:11,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-12-22 07:36:11,121 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:36:11,121 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:36:11,121 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 07:36:11,121 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:36:11,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:36:11,123 INFO L82 PathProgramCache]: Analyzing trace with hash 2045123054, now seen corresponding path program 1 times [2020-12-22 07:36:11,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:36:11,123 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330875898] [2020-12-22 07:36:11,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:36:11,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:36:11,328 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-22 07:36:11,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330875898] [2020-12-22 07:36:11,329 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:36:11,329 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 07:36:11,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902090575] [2020-12-22 07:36:11,330 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 07:36:11,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:36:11,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 07:36:11,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-12-22 07:36:11,331 INFO L87 Difference]: Start difference. First operand 7954 states and 11537 transitions. Second operand 8 states. [2020-12-22 07:36:14,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:36:14,558 INFO L93 Difference]: Finished difference Result 56960 states and 82664 transitions. [2020-12-22 07:36:14,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 07:36:14,559 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 110 [2020-12-22 07:36:14,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:36:14,668 INFO L225 Difference]: With dead ends: 56960 [2020-12-22 07:36:14,668 INFO L226 Difference]: Without dead ends: 49054 [2020-12-22 07:36:14,691 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2020-12-22 07:36:14,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49054 states. [2020-12-22 07:36:16,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49054 to 15858. [2020-12-22 07:36:16,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15858 states. [2020-12-22 07:36:16,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15858 states to 15858 states and 22929 transitions. [2020-12-22 07:36:16,436 INFO L78 Accepts]: Start accepts. Automaton has 15858 states and 22929 transitions. Word has length 110 [2020-12-22 07:36:16,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:36:16,437 INFO L481 AbstractCegarLoop]: Abstraction has 15858 states and 22929 transitions. [2020-12-22 07:36:16,437 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 07:36:16,437 INFO L276 IsEmpty]: Start isEmpty. Operand 15858 states and 22929 transitions. [2020-12-22 07:36:16,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-12-22 07:36:16,444 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:36:16,444 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:36:16,444 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 07:36:16,445 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:36:16,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:36:16,445 INFO L82 PathProgramCache]: Analyzing trace with hash 276340238, now seen corresponding path program 1 times [2020-12-22 07:36:16,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:36:16,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291067249] [2020-12-22 07:36:16,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:36:16,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:36:16,580 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-22 07:36:16,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291067249] [2020-12-22 07:36:16,581 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:36:16,581 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 07:36:16,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97630798] [2020-12-22 07:36:16,582 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 07:36:16,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:36:16,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 07:36:16,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 07:36:16,583 INFO L87 Difference]: Start difference. First operand 15858 states and 22929 transitions. Second operand 8 states. [2020-12-22 07:36:20,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:36:20,347 INFO L93 Difference]: Finished difference Result 64864 states and 94056 transitions. [2020-12-22 07:36:20,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 07:36:20,348 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 110 [2020-12-22 07:36:20,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:36:20,445 INFO L225 Difference]: With dead ends: 64864 [2020-12-22 07:36:20,446 INFO L226 Difference]: Without dead ends: 56958 [2020-12-22 07:36:20,466 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-22 07:36:20,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56958 states. [2020-12-22 07:36:22,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56958 to 27730. [2020-12-22 07:36:22,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27730 states. [2020-12-22 07:36:22,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27730 states to 27730 states and 39937 transitions. [2020-12-22 07:36:22,860 INFO L78 Accepts]: Start accepts. Automaton has 27730 states and 39937 transitions. Word has length 110 [2020-12-22 07:36:22,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:36:22,861 INFO L481 AbstractCegarLoop]: Abstraction has 27730 states and 39937 transitions. [2020-12-22 07:36:22,861 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 07:36:22,861 INFO L276 IsEmpty]: Start isEmpty. Operand 27730 states and 39937 transitions. [2020-12-22 07:36:22,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-12-22 07:36:22,871 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:36:22,871 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:36:22,871 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 07:36:22,872 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:36:22,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:36:22,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1407980078, now seen corresponding path program 1 times [2020-12-22 07:36:22,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:36:22,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215665244] [2020-12-22 07:36:22,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:36:22,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:36:23,061 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 07:36:23,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215665244] [2020-12-22 07:36:23,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:36:23,062 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 07:36:23,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346145146] [2020-12-22 07:36:23,062 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 07:36:23,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:36:23,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 07:36:23,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-12-22 07:36:23,064 INFO L87 Difference]: Start difference. First operand 27730 states and 39937 transitions. Second operand 8 states. [2020-12-22 07:36:27,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:36:27,752 INFO L93 Difference]: Finished difference Result 72768 states and 105448 transitions. [2020-12-22 07:36:27,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 07:36:27,753 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 110 [2020-12-22 07:36:27,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:36:27,859 INFO L225 Difference]: With dead ends: 72768 [2020-12-22 07:36:27,859 INFO L226 Difference]: Without dead ends: 64862 [2020-12-22 07:36:27,882 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2020-12-22 07:36:27,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64862 states. [2020-12-22 07:36:30,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64862 to 35634. [2020-12-22 07:36:30,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35634 states. [2020-12-22 07:36:31,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35634 states to 35634 states and 51329 transitions. [2020-12-22 07:36:31,014 INFO L78 Accepts]: Start accepts. Automaton has 35634 states and 51329 transitions. Word has length 110 [2020-12-22 07:36:31,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:36:31,015 INFO L481 AbstractCegarLoop]: Abstraction has 35634 states and 51329 transitions. [2020-12-22 07:36:31,015 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 07:36:31,015 INFO L276 IsEmpty]: Start isEmpty. Operand 35634 states and 51329 transitions. [2020-12-22 07:36:31,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-12-22 07:36:31,023 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:36:31,023 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:36:31,024 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 07:36:31,024 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:36:31,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:36:31,024 INFO L82 PathProgramCache]: Analyzing trace with hash 172521038, now seen corresponding path program 1 times [2020-12-22 07:36:31,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:36:31,025 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640034436] [2020-12-22 07:36:31,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:36:31,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:36:31,165 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 07:36:31,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640034436] [2020-12-22 07:36:31,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:36:31,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 07:36:31,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334912406] [2020-12-22 07:36:31,167 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 07:36:31,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:36:31,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 07:36:31,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-12-22 07:36:31,168 INFO L87 Difference]: Start difference. First operand 35634 states and 51329 transitions. Second operand 8 states. [2020-12-22 07:36:36,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:36:36,288 INFO L93 Difference]: Finished difference Result 80672 states and 116840 transitions. [2020-12-22 07:36:36,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 07:36:36,289 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 110 [2020-12-22 07:36:36,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:36:36,354 INFO L225 Difference]: With dead ends: 80672 [2020-12-22 07:36:36,354 INFO L226 Difference]: Without dead ends: 72766 [2020-12-22 07:36:36,375 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2020-12-22 07:36:36,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72766 states. [2020-12-22 07:36:39,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72766 to 43538. [2020-12-22 07:36:39,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43538 states. [2020-12-22 07:36:39,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43538 states to 43538 states and 62721 transitions. [2020-12-22 07:36:39,912 INFO L78 Accepts]: Start accepts. Automaton has 43538 states and 62721 transitions. Word has length 110 [2020-12-22 07:36:39,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:36:39,912 INFO L481 AbstractCegarLoop]: Abstraction has 43538 states and 62721 transitions. [2020-12-22 07:36:39,912 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 07:36:39,912 INFO L276 IsEmpty]: Start isEmpty. Operand 43538 states and 62721 transitions. [2020-12-22 07:36:39,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-12-22 07:36:39,920 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:36:39,920 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:36:39,920 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 07:36:39,920 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:36:39,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:36:39,921 INFO L82 PathProgramCache]: Analyzing trace with hash -1248474514, now seen corresponding path program 1 times [2020-12-22 07:36:39,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:36:39,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891628728] [2020-12-22 07:36:39,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:36:39,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:36:40,058 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 07:36:40,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891628728] [2020-12-22 07:36:40,058 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:36:40,058 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 07:36:40,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667255880] [2020-12-22 07:36:40,059 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 07:36:40,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:36:40,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 07:36:40,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-12-22 07:36:40,060 INFO L87 Difference]: Start difference. First operand 43538 states and 62721 transitions. Second operand 8 states. [2020-12-22 07:36:46,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:36:46,155 INFO L93 Difference]: Finished difference Result 88576 states and 128232 transitions. [2020-12-22 07:36:46,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 07:36:46,155 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 110 [2020-12-22 07:36:46,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:36:46,226 INFO L225 Difference]: With dead ends: 88576 [2020-12-22 07:36:46,226 INFO L226 Difference]: Without dead ends: 80670 [2020-12-22 07:36:46,244 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2020-12-22 07:36:46,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80670 states. [2020-12-22 07:36:50,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80670 to 51442. [2020-12-22 07:36:50,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51442 states. [2020-12-22 07:36:50,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51442 states to 51442 states and 74113 transitions. [2020-12-22 07:36:50,506 INFO L78 Accepts]: Start accepts. Automaton has 51442 states and 74113 transitions. Word has length 110 [2020-12-22 07:36:50,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:36:50,507 INFO L481 AbstractCegarLoop]: Abstraction has 51442 states and 74113 transitions. [2020-12-22 07:36:50,507 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 07:36:50,507 INFO L276 IsEmpty]: Start isEmpty. Operand 51442 states and 74113 transitions. [2020-12-22 07:36:50,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 07:36:50,516 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:36:50,517 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:36:50,517 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 07:36:50,517 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:36:50,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:36:50,518 INFO L82 PathProgramCache]: Analyzing trace with hash 1214001382, now seen corresponding path program 1 times [2020-12-22 07:36:50,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:36:50,518 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936457300] [2020-12-22 07:36:50,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:36:50,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:36:50,577 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:36:50,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936457300] [2020-12-22 07:36:50,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:36:50,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:36:50,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612717385] [2020-12-22 07:36:50,579 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:36:50,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:36:50,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:36:50,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:36:50,580 INFO L87 Difference]: Start difference. First operand 51442 states and 74113 transitions. Second operand 3 states. [2020-12-22 07:36:53,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:36:53,361 INFO L93 Difference]: Finished difference Result 87255 states and 126155 transitions. [2020-12-22 07:36:53,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:36:53,362 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 112 [2020-12-22 07:36:53,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:36:53,393 INFO L225 Difference]: With dead ends: 87255 [2020-12-22 07:36:53,393 INFO L226 Difference]: Without dead ends: 35861 [2020-12-22 07:36:53,419 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:36:53,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35861 states. [2020-12-22 07:36:56,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35861 to 35859. [2020-12-22 07:36:56,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35859 states. [2020-12-22 07:36:56,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35859 states to 35859 states and 51672 transitions. [2020-12-22 07:36:56,430 INFO L78 Accepts]: Start accepts. Automaton has 35859 states and 51672 transitions. Word has length 112 [2020-12-22 07:36:56,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:36:56,430 INFO L481 AbstractCegarLoop]: Abstraction has 35859 states and 51672 transitions. [2020-12-22 07:36:56,430 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:36:56,430 INFO L276 IsEmpty]: Start isEmpty. Operand 35859 states and 51672 transitions. [2020-12-22 07:36:56,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 07:36:56,435 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:36:56,435 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:36:56,435 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 07:36:56,435 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:36:56,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:36:56,436 INFO L82 PathProgramCache]: Analyzing trace with hash -1083421453, now seen corresponding path program 1 times [2020-12-22 07:36:56,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:36:56,436 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10566324] [2020-12-22 07:36:56,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:36:56,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:36:56,592 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 07:36:56,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10566324] [2020-12-22 07:36:56,592 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:36:56,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 07:36:56,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681521370] [2020-12-22 07:36:56,594 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 07:36:56,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:36:56,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 07:36:56,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-12-22 07:36:56,595 INFO L87 Difference]: Start difference. First operand 35859 states and 51672 transitions. Second operand 8 states. [2020-12-22 07:37:01,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:37:01,986 INFO L93 Difference]: Finished difference Result 68897 states and 99679 transitions. [2020-12-22 07:37:01,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 07:37:01,987 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 112 [2020-12-22 07:37:01,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:37:02,046 INFO L225 Difference]: With dead ends: 68897 [2020-12-22 07:37:02,046 INFO L226 Difference]: Without dead ends: 63391 [2020-12-22 07:37:02,057 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2020-12-22 07:37:02,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63391 states. [2020-12-22 07:37:05,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63391 to 41363. [2020-12-22 07:37:05,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41363 states. [2020-12-22 07:37:05,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41363 states to 41363 states and 59608 transitions. [2020-12-22 07:37:05,785 INFO L78 Accepts]: Start accepts. Automaton has 41363 states and 59608 transitions. Word has length 112 [2020-12-22 07:37:05,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:37:05,785 INFO L481 AbstractCegarLoop]: Abstraction has 41363 states and 59608 transitions. [2020-12-22 07:37:05,785 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 07:37:05,785 INFO L276 IsEmpty]: Start isEmpty. Operand 41363 states and 59608 transitions. [2020-12-22 07:37:05,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-12-22 07:37:05,791 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:37:05,791 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:37:05,791 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 07:37:05,792 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:37:05,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:37:05,792 INFO L82 PathProgramCache]: Analyzing trace with hash 1698985365, now seen corresponding path program 1 times [2020-12-22 07:37:05,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:37:05,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249279731] [2020-12-22 07:37:05,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:37:05,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:37:06,147 WARN L197 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 18 [2020-12-22 07:37:06,215 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:37:06,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249279731] [2020-12-22 07:37:06,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122372064] [2020-12-22 07:37:06,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:37:06,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:37:06,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 07:37:06,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:37:06,812 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 07:37:06,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:37:06,813 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4] total 12 [2020-12-22 07:37:06,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074558271] [2020-12-22 07:37:06,814 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 07:37:06,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:37:06,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 07:37:06,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-12-22 07:37:06,815 INFO L87 Difference]: Start difference. First operand 41363 states and 59608 transitions. Second operand 12 states. [2020-12-22 07:37:32,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:37:32,409 INFO L93 Difference]: Finished difference Result 271960 states and 386714 transitions. [2020-12-22 07:37:32,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-22 07:37:32,410 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 113 [2020-12-22 07:37:32,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:37:33,027 INFO L225 Difference]: With dead ends: 271960 [2020-12-22 07:37:33,028 INFO L226 Difference]: Without dead ends: 230678 [2020-12-22 07:37:33,117 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 806 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=578, Invalid=2074, Unknown=0, NotChecked=0, Total=2652 [2020-12-22 07:37:33,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230678 states. [2020-12-22 07:37:48,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230678 to 132496. [2020-12-22 07:37:48,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132496 states. [2020-12-22 07:37:48,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132496 states to 132496 states and 186150 transitions. [2020-12-22 07:37:48,686 INFO L78 Accepts]: Start accepts. Automaton has 132496 states and 186150 transitions. Word has length 113 [2020-12-22 07:37:48,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:37:48,686 INFO L481 AbstractCegarLoop]: Abstraction has 132496 states and 186150 transitions. [2020-12-22 07:37:48,686 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 07:37:48,687 INFO L276 IsEmpty]: Start isEmpty. Operand 132496 states and 186150 transitions. [2020-12-22 07:37:48,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-12-22 07:37:48,712 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:37:48,714 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:37:48,927 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:37:48,928 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:37:48,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:37:48,930 INFO L82 PathProgramCache]: Analyzing trace with hash -862135715, now seen corresponding path program 1 times [2020-12-22 07:37:48,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:37:48,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285674930] [2020-12-22 07:37:48,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:37:48,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:37:49,187 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:37:49,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285674930] [2020-12-22 07:37:49,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653988123] [2020-12-22 07:37:49,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:37:49,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:37:49,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 542 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-22 07:37:49,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:37:49,573 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 07:37:49,828 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:37:49,829 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:37:49,829 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 07:37:49,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075783640] [2020-12-22 07:37:49,830 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 07:37:49,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:37:49,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 07:37:49,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2020-12-22 07:37:49,831 INFO L87 Difference]: Start difference. First operand 132496 states and 186150 transitions. Second operand 17 states. [2020-12-22 07:37:50,348 WARN L197 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 22 [2020-12-22 07:39:05,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:39:05,099 INFO L93 Difference]: Finished difference Result 762326 states and 1061813 transitions. [2020-12-22 07:39:05,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-22 07:39:05,099 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 114 [2020-12-22 07:39:05,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:39:06,227 INFO L225 Difference]: With dead ends: 762326 [2020-12-22 07:39:06,227 INFO L226 Difference]: Without dead ends: 646377 [2020-12-22 07:39:06,758 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=581, Invalid=1675, Unknown=0, NotChecked=0, Total=2256 [2020-12-22 07:39:07,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646377 states. [2020-12-22 07:39:44,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646377 to 301644. [2020-12-22 07:39:44,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 301644 states. [2020-12-22 07:39:45,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301644 states to 301644 states and 422317 transitions. [2020-12-22 07:39:45,737 INFO L78 Accepts]: Start accepts. Automaton has 301644 states and 422317 transitions. Word has length 114 [2020-12-22 07:39:45,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:39:45,737 INFO L481 AbstractCegarLoop]: Abstraction has 301644 states and 422317 transitions. [2020-12-22 07:39:45,737 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 07:39:45,737 INFO L276 IsEmpty]: Start isEmpty. Operand 301644 states and 422317 transitions. [2020-12-22 07:39:45,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-12-22 07:39:45,756 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:39:45,757 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:39:45,971 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:39:45,972 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:39:45,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:39:45,973 INFO L82 PathProgramCache]: Analyzing trace with hash 355849683, now seen corresponding path program 1 times [2020-12-22 07:39:45,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:39:45,973 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124229238] [2020-12-22 07:39:45,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:39:46,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:39:46,036 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:39:46,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124229238] [2020-12-22 07:39:46,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:39:46,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:39:46,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741722571] [2020-12-22 07:39:46,038 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:39:46,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:39:46,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:39:46,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:39:46,039 INFO L87 Difference]: Start difference. First operand 301644 states and 422317 transitions. Second operand 3 states.