/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/eca-rers2012/Problem13_label53.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 01:49:11,912 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 01:49:11,917 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 01:49:11,989 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 01:49:11,990 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 01:49:11,994 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 01:49:11,999 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 01:49:12,010 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 01:49:12,014 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 01:49:12,023 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 01:49:12,025 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 01:49:12,027 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 01:49:12,027 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 01:49:12,029 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 01:49:12,031 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 01:49:12,033 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 01:49:12,034 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 01:49:12,035 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 01:49:12,038 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 01:49:12,041 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 01:49:12,043 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 01:49:12,048 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 01:49:12,050 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 01:49:12,055 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 01:49:12,059 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 01:49:12,079 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 01:49:12,080 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 01:49:12,081 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 01:49:12,083 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 01:49:12,113 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 01:49:12,113 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 01:49:12,115 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 01:49:12,116 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 01:49:12,116 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 01:49:12,117 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 01:49:12,117 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 01:49:12,117 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 01:49:12,117 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 01:49:12,118 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 01:49:12,118 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 01:49:12,118 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 01:49:12,118 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 01:49:12,118 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 01:49:12,119 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 01:49:12,119 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 01:49:12,119 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 01:49:12,119 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 01:49:12,120 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 01:49:12,120 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 01:49:12,120 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 01:49:12,120 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 01:49:12,120 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 01:49:12,121 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 01:49:12,121 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 01:49:12,121 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 01:49:12,551 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 01:49:12,588 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 01:49:12,592 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 01:49:12,594 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 01:49:12,595 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 01:49:12,596 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem13_label53.c [2020-12-22 01:49:12,697 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e84726d9/b69d0ffee0794e8aa968c724341e19ec/FLAGcb92d1275 [2020-12-22 01:49:14,144 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 01:49:14,144 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label53.c [2020-12-22 01:49:14,196 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e84726d9/b69d0ffee0794e8aa968c724341e19ec/FLAGcb92d1275 [2020-12-22 01:49:14,422 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e84726d9/b69d0ffee0794e8aa968c724341e19ec [2020-12-22 01:49:14,425 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 01:49:14,429 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 01:49:14,431 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 01:49:14,431 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 01:49:14,436 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 01:49:14,438 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:49:14" (1/1) ... [2020-12-22 01:49:14,440 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4556bf9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:49:14, skipping insertion in model container [2020-12-22 01:49:14,440 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:49:14" (1/1) ... [2020-12-22 01:49:14,450 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 01:49:14,685 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 01:49:15,079 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/eca-rers2012/Problem13_label53.c[4658,4671] [2020-12-22 01:49:16,407 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 01:49:16,420 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 01:49:16,468 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/eca-rers2012/Problem13_label53.c[4658,4671] [2020-12-22 01:49:17,255 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 01:49:17,304 INFO L208 MainTranslator]: Completed translation [2020-12-22 01:49:17,304 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:49:17 WrapperNode [2020-12-22 01:49:17,305 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 01:49:17,307 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 01:49:17,308 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 01:49:17,308 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 01:49:17,320 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:49:17" (1/1) ... [2020-12-22 01:49:17,441 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:49:17" (1/1) ... [2020-12-22 01:49:18,338 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 01:49:18,339 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 01:49:18,340 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 01:49:18,340 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 01:49:18,353 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:49:17" (1/1) ... [2020-12-22 01:49:18,354 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:49:17" (1/1) ... [2020-12-22 01:49:18,500 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:49:17" (1/1) ... [2020-12-22 01:49:18,500 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:49:17" (1/1) ... [2020-12-22 01:49:18,905 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:49:17" (1/1) ... [2020-12-22 01:49:18,966 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:49:17" (1/1) ... [2020-12-22 01:49:19,155 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:49:17" (1/1) ... [2020-12-22 01:49:19,297 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 01:49:19,300 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 01:49:19,301 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 01:49:19,301 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 01:49:19,302 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:49:17" (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 01:49:19,493 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 01:49:19,493 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 01:49:19,494 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 01:49:19,494 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 01:49:27,926 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 01:49:27,926 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2020-12-22 01:49:27,931 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:49:27 BoogieIcfgContainer [2020-12-22 01:49:27,932 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 01:49:27,936 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 01:49:27,937 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 01:49:27,943 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 01:49:27,945 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 01:49:14" (1/3) ... [2020-12-22 01:49:27,947 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@746e859b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:49:27, skipping insertion in model container [2020-12-22 01:49:27,947 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:49:17" (2/3) ... [2020-12-22 01:49:27,948 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@746e859b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:49:27, skipping insertion in model container [2020-12-22 01:49:27,948 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:49:27" (3/3) ... [2020-12-22 01:49:27,951 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label53.c [2020-12-22 01:49:27,962 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 01:49:27,971 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 01:49:28,004 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 01:49:28,054 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 01:49:28,054 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 01:49:28,054 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 01:49:28,054 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 01:49:28,055 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 01:49:28,055 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 01:49:28,055 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 01:49:28,055 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 01:49:28,100 INFO L276 IsEmpty]: Start isEmpty. Operand 1098 states. [2020-12-22 01:49:28,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-22 01:49:28,109 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:49:28,110 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] [2020-12-22 01:49:28,111 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:49:28,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:49:28,120 INFO L82 PathProgramCache]: Analyzing trace with hash -1843609039, now seen corresponding path program 1 times [2020-12-22 01:49:28,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:49:28,134 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571319883] [2020-12-22 01:49:28,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:49:28,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:49:28,617 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 01:49:28,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571319883] [2020-12-22 01:49:28,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:49:28,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 01:49:28,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320494149] [2020-12-22 01:49:28,628 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 01:49:28,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:49:28,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 01:49:28,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 01:49:28,654 INFO L87 Difference]: Start difference. First operand 1098 states. Second operand 4 states. [2020-12-22 01:49:43,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:49:43,136 INFO L93 Difference]: Finished difference Result 3829 states and 7206 transitions. [2020-12-22 01:49:43,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 01:49:43,139 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2020-12-22 01:49:43,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:49:43,185 INFO L225 Difference]: With dead ends: 3829 [2020-12-22 01:49:43,185 INFO L226 Difference]: Without dead ends: 2664 [2020-12-22 01:49:43,198 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 01:49:43,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2664 states. [2020-12-22 01:49:43,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2664 to 2663. [2020-12-22 01:49:43,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2663 states. [2020-12-22 01:49:43,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2663 states to 2663 states and 3889 transitions. [2020-12-22 01:49:43,400 INFO L78 Accepts]: Start accepts. Automaton has 2663 states and 3889 transitions. Word has length 31 [2020-12-22 01:49:43,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:49:43,401 INFO L481 AbstractCegarLoop]: Abstraction has 2663 states and 3889 transitions. [2020-12-22 01:49:43,401 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 01:49:43,401 INFO L276 IsEmpty]: Start isEmpty. Operand 2663 states and 3889 transitions. [2020-12-22 01:49:43,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-12-22 01:49:43,408 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:49:43,409 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 01:49:43,409 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 01:49:43,409 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:49:43,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:49:43,411 INFO L82 PathProgramCache]: Analyzing trace with hash -1151672921, now seen corresponding path program 1 times [2020-12-22 01:49:43,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:49:43,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346029407] [2020-12-22 01:49:43,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:49:43,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:49:43,867 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-12-22 01:49:43,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346029407] [2020-12-22 01:49:43,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:49:43,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 01:49:43,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115110266] [2020-12-22 01:49:43,872 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:49:43,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:49:43,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:49:43,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:49:43,874 INFO L87 Difference]: Start difference. First operand 2663 states and 3889 transitions. Second operand 3 states. [2020-12-22 01:49:53,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:49:53,315 INFO L93 Difference]: Finished difference Result 6142 states and 9712 transitions. [2020-12-22 01:49:53,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:49:53,318 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 156 [2020-12-22 01:49:53,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:49:53,348 INFO L225 Difference]: With dead ends: 6142 [2020-12-22 01:49:53,348 INFO L226 Difference]: Without dead ends: 4268 [2020-12-22 01:49:53,355 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 01:49:53,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4268 states. [2020-12-22 01:49:53,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4268 to 4254. [2020-12-22 01:49:53,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4254 states. [2020-12-22 01:49:53,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4254 states to 4254 states and 5748 transitions. [2020-12-22 01:49:53,478 INFO L78 Accepts]: Start accepts. Automaton has 4254 states and 5748 transitions. Word has length 156 [2020-12-22 01:49:53,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:49:53,480 INFO L481 AbstractCegarLoop]: Abstraction has 4254 states and 5748 transitions. [2020-12-22 01:49:53,480 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:49:53,480 INFO L276 IsEmpty]: Start isEmpty. Operand 4254 states and 5748 transitions. [2020-12-22 01:49:53,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2020-12-22 01:49:53,486 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:49:53,487 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 01:49:53,487 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 01:49:53,487 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:49:53,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:49:53,489 INFO L82 PathProgramCache]: Analyzing trace with hash 97896795, now seen corresponding path program 1 times [2020-12-22 01:49:53,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:49:53,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859763717] [2020-12-22 01:49:53,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:49:53,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:49:53,790 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-12-22 01:49:53,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859763717] [2020-12-22 01:49:53,791 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:49:53,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 01:49:53,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059622090] [2020-12-22 01:49:53,796 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:49:53,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:49:53,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:49:53,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:49:53,802 INFO L87 Difference]: Start difference. First operand 4254 states and 5748 transitions. Second operand 3 states. [2020-12-22 01:50:02,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:50:02,724 INFO L93 Difference]: Finished difference Result 10899 states and 15275 transitions. [2020-12-22 01:50:02,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:50:02,726 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 198 [2020-12-22 01:50:02,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:50:02,772 INFO L225 Difference]: With dead ends: 10899 [2020-12-22 01:50:02,772 INFO L226 Difference]: Without dead ends: 7434 [2020-12-22 01:50:02,780 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 01:50:02,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7434 states. [2020-12-22 01:50:02,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7434 to 7426. [2020-12-22 01:50:02,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7426 states. [2020-12-22 01:50:02,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7426 states to 7426 states and 9570 transitions. [2020-12-22 01:50:02,997 INFO L78 Accepts]: Start accepts. Automaton has 7426 states and 9570 transitions. Word has length 198 [2020-12-22 01:50:02,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:50:02,998 INFO L481 AbstractCegarLoop]: Abstraction has 7426 states and 9570 transitions. [2020-12-22 01:50:02,998 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:50:02,998 INFO L276 IsEmpty]: Start isEmpty. Operand 7426 states and 9570 transitions. [2020-12-22 01:50:03,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2020-12-22 01:50:03,004 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:50:03,004 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 01:50:03,004 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 01:50:03,005 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:50:03,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:50:03,006 INFO L82 PathProgramCache]: Analyzing trace with hash -2029999490, now seen corresponding path program 1 times [2020-12-22 01:50:03,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:50:03,006 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487087759] [2020-12-22 01:50:03,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:50:03,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:50:03,492 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 141 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 01:50:03,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487087759] [2020-12-22 01:50:03,493 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:50:03,494 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 01:50:03,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648217762] [2020-12-22 01:50:03,494 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 01:50:03,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:50:03,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 01:50:03,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 01:50:03,503 INFO L87 Difference]: Start difference. First operand 7426 states and 9570 transitions. Second operand 4 states. [2020-12-22 01:50:22,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:50:22,257 INFO L93 Difference]: Finished difference Result 26882 states and 35363 transitions. [2020-12-22 01:50:22,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 01:50:22,264 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 212 [2020-12-22 01:50:22,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:50:22,384 INFO L225 Difference]: With dead ends: 26882 [2020-12-22 01:50:22,384 INFO L226 Difference]: Without dead ends: 20245 [2020-12-22 01:50:22,408 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 01:50:22,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20245 states. [2020-12-22 01:50:23,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20245 to 20128. [2020-12-22 01:50:23,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20128 states. [2020-12-22 01:50:23,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20128 states to 20128 states and 25301 transitions. [2020-12-22 01:50:23,190 INFO L78 Accepts]: Start accepts. Automaton has 20128 states and 25301 transitions. Word has length 212 [2020-12-22 01:50:23,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:50:23,190 INFO L481 AbstractCegarLoop]: Abstraction has 20128 states and 25301 transitions. [2020-12-22 01:50:23,191 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 01:50:23,191 INFO L276 IsEmpty]: Start isEmpty. Operand 20128 states and 25301 transitions. [2020-12-22 01:50:23,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2020-12-22 01:50:23,195 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:50:23,196 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 01:50:23,196 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 01:50:23,196 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:50:23,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:50:23,197 INFO L82 PathProgramCache]: Analyzing trace with hash -1982906533, now seen corresponding path program 1 times [2020-12-22 01:50:23,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:50:23,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319918653] [2020-12-22 01:50:23,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:50:23,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:50:23,489 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2020-12-22 01:50:23,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319918653] [2020-12-22 01:50:23,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:50:23,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 01:50:23,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151500393] [2020-12-22 01:50:23,491 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:50:23,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:50:23,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:50:23,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:50:23,494 INFO L87 Difference]: Start difference. First operand 20128 states and 25301 transitions. Second operand 3 states. [2020-12-22 01:50:33,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:50:33,498 INFO L93 Difference]: Finished difference Result 57562 states and 72828 transitions. [2020-12-22 01:50:33,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:50:33,500 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 228 [2020-12-22 01:50:33,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:50:33,609 INFO L225 Difference]: With dead ends: 57562 [2020-12-22 01:50:33,610 INFO L226 Difference]: Without dead ends: 38223 [2020-12-22 01:50:33,650 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 01:50:33,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38223 states. [2020-12-22 01:50:34,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38223 to 35068. [2020-12-22 01:50:34,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35068 states. [2020-12-22 01:50:34,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35068 states to 35068 states and 41754 transitions. [2020-12-22 01:50:34,640 INFO L78 Accepts]: Start accepts. Automaton has 35068 states and 41754 transitions. Word has length 228 [2020-12-22 01:50:34,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:50:34,641 INFO L481 AbstractCegarLoop]: Abstraction has 35068 states and 41754 transitions. [2020-12-22 01:50:34,641 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:50:34,641 INFO L276 IsEmpty]: Start isEmpty. Operand 35068 states and 41754 transitions. [2020-12-22 01:50:34,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-12-22 01:50:34,651 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:50:34,651 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-12-22 01:50:34,652 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 01:50:34,652 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:50:34,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:50:34,653 INFO L82 PathProgramCache]: Analyzing trace with hash -423749085, now seen corresponding path program 1 times [2020-12-22 01:50:34,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:50:34,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112444878] [2020-12-22 01:50:34,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:50:35,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:50:35,722 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 226 proven. 25 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2020-12-22 01:50:35,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112444878] [2020-12-22 01:50:35,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602237334] [2020-12-22 01:50:35,724 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 01:50:35,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:50:35,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-22 01:50:35,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 01:50:37,128 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 321 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-12-22 01:50:37,129 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 01:50:37,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2020-12-22 01:50:37,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017629496] [2020-12-22 01:50:37,131 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:50:37,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:50:37,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:50:37,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 01:50:37,132 INFO L87 Difference]: Start difference. First operand 35068 states and 41754 transitions. Second operand 3 states. [2020-12-22 01:50:48,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:50:48,168 INFO L93 Difference]: Finished difference Result 96104 states and 115499 transitions. [2020-12-22 01:50:48,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:50:48,170 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 328 [2020-12-22 01:50:48,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:50:48,368 INFO L225 Difference]: With dead ends: 96104 [2020-12-22 01:50:48,369 INFO L226 Difference]: Without dead ends: 61825 [2020-12-22 01:50:48,452 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 327 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 01:50:48,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61825 states. [2020-12-22 01:50:49,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61825 to 60251. [2020-12-22 01:50:49,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60251 states. [2020-12-22 01:50:49,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60251 states to 60251 states and 68788 transitions. [2020-12-22 01:50:49,877 INFO L78 Accepts]: Start accepts. Automaton has 60251 states and 68788 transitions. Word has length 328 [2020-12-22 01:50:49,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:50:49,877 INFO L481 AbstractCegarLoop]: Abstraction has 60251 states and 68788 transitions. [2020-12-22 01:50:49,878 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:50:49,878 INFO L276 IsEmpty]: Start isEmpty. Operand 60251 states and 68788 transitions. [2020-12-22 01:50:49,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2020-12-22 01:50:49,893 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:50:49,893 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 01:50:50,106 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-22 01:50:50,108 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:50:50,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:50:50,109 INFO L82 PathProgramCache]: Analyzing trace with hash -547594964, now seen corresponding path program 1 times [2020-12-22 01:50:50,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:50:50,110 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384801079] [2020-12-22 01:50:50,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:50:50,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:50:50,984 INFO L134 CoverageAnalysis]: Checked inductivity of 322 backedges. 293 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-12-22 01:50:50,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384801079] [2020-12-22 01:50:50,985 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:50:50,986 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 01:50:50,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718411317] [2020-12-22 01:50:50,988 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:50:50,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:50:50,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:50:50,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:50:50,990 INFO L87 Difference]: Start difference. First operand 60251 states and 68788 transitions. Second operand 3 states. [2020-12-22 01:51:03,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:51:03,042 INFO L93 Difference]: Finished difference Result 145697 states and 168486 transitions. [2020-12-22 01:51:03,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:51:03,044 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 329 [2020-12-22 01:51:03,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:51:03,260 INFO L225 Difference]: With dead ends: 145697 [2020-12-22 01:51:03,260 INFO L226 Difference]: Without dead ends: 86235 [2020-12-22 01:51:03,318 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 01:51:03,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86235 states. [2020-12-22 01:51:04,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86235 to 82288. [2020-12-22 01:51:04,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82288 states. [2020-12-22 01:51:05,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82288 states to 82288 states and 93244 transitions. [2020-12-22 01:51:05,277 INFO L78 Accepts]: Start accepts. Automaton has 82288 states and 93244 transitions. Word has length 329 [2020-12-22 01:51:05,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:51:05,278 INFO L481 AbstractCegarLoop]: Abstraction has 82288 states and 93244 transitions. [2020-12-22 01:51:05,278 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:51:05,279 INFO L276 IsEmpty]: Start isEmpty. Operand 82288 states and 93244 transitions. [2020-12-22 01:51:05,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 349 [2020-12-22 01:51:05,289 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:51:05,290 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-12-22 01:51:05,290 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 01:51:05,290 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:51:05,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:51:05,291 INFO L82 PathProgramCache]: Analyzing trace with hash 1517741994, now seen corresponding path program 1 times [2020-12-22 01:51:05,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:51:05,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896621292] [2020-12-22 01:51:05,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:51:05,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:51:05,724 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 336 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-12-22 01:51:05,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896621292] [2020-12-22 01:51:05,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:51:05,725 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 01:51:05,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647270606] [2020-12-22 01:51:05,727 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:51:05,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:51:05,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:51:05,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:51:05,728 INFO L87 Difference]: Start difference. First operand 82288 states and 93244 transitions. Second operand 3 states. [2020-12-22 01:51:17,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:51:17,297 INFO L93 Difference]: Finished difference Result 171636 states and 193523 transitions. [2020-12-22 01:51:17,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:51:17,299 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 348 [2020-12-22 01:51:17,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:51:17,456 INFO L225 Difference]: With dead ends: 171636 [2020-12-22 01:51:17,457 INFO L226 Difference]: Without dead ends: 83837 [2020-12-22 01:51:17,515 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 01:51:17,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83837 states. [2020-12-22 01:51:18,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83837 to 76748. [2020-12-22 01:51:18,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76748 states. [2020-12-22 01:51:18,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76748 states to 76748 states and 83734 transitions. [2020-12-22 01:51:18,972 INFO L78 Accepts]: Start accepts. Automaton has 76748 states and 83734 transitions. Word has length 348 [2020-12-22 01:51:18,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:51:18,973 INFO L481 AbstractCegarLoop]: Abstraction has 76748 states and 83734 transitions. [2020-12-22 01:51:18,973 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:51:18,973 INFO L276 IsEmpty]: Start isEmpty. Operand 76748 states and 83734 transitions. [2020-12-22 01:51:18,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 358 [2020-12-22 01:51:18,978 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:51:18,979 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 01:51:18,979 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 01:51:18,979 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:51:18,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:51:18,980 INFO L82 PathProgramCache]: Analyzing trace with hash -2091315285, now seen corresponding path program 1 times [2020-12-22 01:51:18,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:51:18,980 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500150976] [2020-12-22 01:51:18,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:51:19,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:51:19,681 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 339 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-12-22 01:51:19,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500150976] [2020-12-22 01:51:19,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:51:19,682 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 01:51:19,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64828457] [2020-12-22 01:51:19,683 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 01:51:19,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:51:19,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 01:51:19,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 01:51:19,684 INFO L87 Difference]: Start difference. First operand 76748 states and 83734 transitions. Second operand 4 states. [2020-12-22 01:51:34,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:51:34,726 INFO L93 Difference]: Finished difference Result 161365 states and 175733 transitions. [2020-12-22 01:51:34,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 01:51:34,730 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 357 [2020-12-22 01:51:34,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:51:34,894 INFO L225 Difference]: With dead ends: 161365 [2020-12-22 01:51:34,894 INFO L226 Difference]: Without dead ends: 83828 [2020-12-22 01:51:34,951 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 01:51:35,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83828 states. [2020-12-22 01:51:36,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83828 to 81466. [2020-12-22 01:51:36,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81466 states. [2020-12-22 01:51:36,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81466 states to 81466 states and 88059 transitions. [2020-12-22 01:51:36,620 INFO L78 Accepts]: Start accepts. Automaton has 81466 states and 88059 transitions. Word has length 357 [2020-12-22 01:51:36,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:51:36,620 INFO L481 AbstractCegarLoop]: Abstraction has 81466 states and 88059 transitions. [2020-12-22 01:51:36,620 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 01:51:36,620 INFO L276 IsEmpty]: Start isEmpty. Operand 81466 states and 88059 transitions. [2020-12-22 01:51:36,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 388 [2020-12-22 01:51:36,628 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:51:36,629 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 01:51:36,629 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 01:51:36,629 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:51:36,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:51:36,630 INFO L82 PathProgramCache]: Analyzing trace with hash -439560054, now seen corresponding path program 1 times [2020-12-22 01:51:36,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:51:36,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827198091] [2020-12-22 01:51:36,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:51:36,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:51:37,391 INFO L134 CoverageAnalysis]: Checked inductivity of 605 backedges. 444 proven. 0 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2020-12-22 01:51:37,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827198091] [2020-12-22 01:51:37,394 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:51:37,394 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 01:51:37,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670811740] [2020-12-22 01:51:37,395 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:51:37,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:51:37,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:51:37,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:51:37,399 INFO L87 Difference]: Start difference. First operand 81466 states and 88059 transitions. Second operand 3 states. [2020-12-22 01:51:50,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:51:50,875 INFO L93 Difference]: Finished difference Result 188126 states and 204945 transitions. [2020-12-22 01:51:50,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:51:50,877 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 387 [2020-12-22 01:51:50,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:51:51,031 INFO L225 Difference]: With dead ends: 188126 [2020-12-22 01:51:51,031 INFO L226 Difference]: Without dead ends: 106661 [2020-12-22 01:51:51,081 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 01:51:51,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106661 states. [2020-12-22 01:51:52,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106661 to 105071. [2020-12-22 01:51:52,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105071 states. [2020-12-22 01:51:52,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105071 states to 105071 states and 113914 transitions. [2020-12-22 01:51:52,945 INFO L78 Accepts]: Start accepts. Automaton has 105071 states and 113914 transitions. Word has length 387 [2020-12-22 01:51:52,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:51:52,947 INFO L481 AbstractCegarLoop]: Abstraction has 105071 states and 113914 transitions. [2020-12-22 01:51:52,948 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:51:52,948 INFO L276 IsEmpty]: Start isEmpty. Operand 105071 states and 113914 transitions. [2020-12-22 01:51:52,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2020-12-22 01:51:52,967 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:51:52,968 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 01:51:52,968 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 01:51:52,971 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:51:52,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:51:52,972 INFO L82 PathProgramCache]: Analyzing trace with hash -2285553, now seen corresponding path program 1 times [2020-12-22 01:51:52,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:51:52,972 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029252929] [2020-12-22 01:51:52,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:51:53,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:51:53,497 INFO L134 CoverageAnalysis]: Checked inductivity of 657 backedges. 540 proven. 0 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2020-12-22 01:51:53,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029252929] [2020-12-22 01:51:53,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:51:53,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 01:51:53,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577837980] [2020-12-22 01:51:53,500 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:51:53,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:51:53,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:51:53,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:51:53,501 INFO L87 Difference]: Start difference. First operand 105071 states and 113914 transitions. Second operand 3 states. [2020-12-22 01:52:07,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:52:07,506 INFO L93 Difference]: Finished difference Result 210931 states and 228628 transitions. [2020-12-22 01:52:07,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:52:07,510 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 408 [2020-12-22 01:52:07,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:52:07,706 INFO L225 Difference]: With dead ends: 210931 [2020-12-22 01:52:07,706 INFO L226 Difference]: Without dead ends: 106649 [2020-12-22 01:52:07,775 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 01:52:07,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106649 states. [2020-12-22 01:52:09,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106649 to 103488. [2020-12-22 01:52:09,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103488 states. [2020-12-22 01:52:09,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103488 states to 103488 states and 110062 transitions. [2020-12-22 01:52:09,586 INFO L78 Accepts]: Start accepts. Automaton has 103488 states and 110062 transitions. Word has length 408 [2020-12-22 01:52:09,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:52:09,587 INFO L481 AbstractCegarLoop]: Abstraction has 103488 states and 110062 transitions. [2020-12-22 01:52:09,587 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:52:09,587 INFO L276 IsEmpty]: Start isEmpty. Operand 103488 states and 110062 transitions. [2020-12-22 01:52:09,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2020-12-22 01:52:09,593 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:52:09,594 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-12-22 01:52:09,594 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 01:52:09,594 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:52:09,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:52:09,595 INFO L82 PathProgramCache]: Analyzing trace with hash 514261495, now seen corresponding path program 1 times [2020-12-22 01:52:09,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:52:09,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314681395] [2020-12-22 01:52:09,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:52:09,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:52:10,161 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 330 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2020-12-22 01:52:10,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314681395] [2020-12-22 01:52:10,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:52:10,162 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 01:52:10,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736282482] [2020-12-22 01:52:10,163 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:52:10,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:52:10,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:52:10,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:52:10,164 INFO L87 Difference]: Start difference. First operand 103488 states and 110062 transitions. Second operand 3 states. [2020-12-22 01:52:25,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:52:25,123 INFO L93 Difference]: Finished difference Result 208564 states and 221877 transitions. [2020-12-22 01:52:25,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:52:25,126 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 419 [2020-12-22 01:52:25,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:52:25,331 INFO L225 Difference]: With dead ends: 208564 [2020-12-22 01:52:25,331 INFO L226 Difference]: Without dead ends: 105865 [2020-12-22 01:52:25,410 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 01:52:25,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105865 states. [2020-12-22 01:52:26,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105865 to 105850. [2020-12-22 01:52:26,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105850 states. [2020-12-22 01:52:27,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105850 states to 105850 states and 112540 transitions. [2020-12-22 01:52:27,354 INFO L78 Accepts]: Start accepts. Automaton has 105850 states and 112540 transitions. Word has length 419 [2020-12-22 01:52:27,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:52:27,355 INFO L481 AbstractCegarLoop]: Abstraction has 105850 states and 112540 transitions. [2020-12-22 01:52:27,356 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:52:27,356 INFO L276 IsEmpty]: Start isEmpty. Operand 105850 states and 112540 transitions. [2020-12-22 01:52:27,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 426 [2020-12-22 01:52:27,362 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:52:27,363 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-12-22 01:52:27,363 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 01:52:27,363 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:52:27,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:52:27,364 INFO L82 PathProgramCache]: Analyzing trace with hash -165212699, now seen corresponding path program 1 times [2020-12-22 01:52:27,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:52:27,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304543339] [2020-12-22 01:52:27,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:52:27,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:52:27,956 INFO L134 CoverageAnalysis]: Checked inductivity of 614 backedges. 342 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2020-12-22 01:52:27,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304543339] [2020-12-22 01:52:27,957 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:52:27,957 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 01:52:27,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899620479] [2020-12-22 01:52:27,958 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:52:27,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:52:27,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:52:27,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:52:27,960 INFO L87 Difference]: Start difference. First operand 105850 states and 112540 transitions. Second operand 3 states. [2020-12-22 01:52:45,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:52:45,103 INFO L93 Difference]: Finished difference Result 233751 states and 249414 transitions. [2020-12-22 01:52:45,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:52:45,108 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 425 [2020-12-22 01:52:45,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:52:45,378 INFO L225 Difference]: With dead ends: 233751 [2020-12-22 01:52:45,378 INFO L226 Difference]: Without dead ends: 128690 [2020-12-22 01:52:45,465 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 01:52:45,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128690 states. [2020-12-22 01:52:47,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128690 to 125525. [2020-12-22 01:52:47,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125525 states. [2020-12-22 01:52:47,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125525 states to 125525 states and 132817 transitions. [2020-12-22 01:52:47,760 INFO L78 Accepts]: Start accepts. Automaton has 125525 states and 132817 transitions. Word has length 425 [2020-12-22 01:52:47,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:52:47,761 INFO L481 AbstractCegarLoop]: Abstraction has 125525 states and 132817 transitions. [2020-12-22 01:52:47,761 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:52:47,761 INFO L276 IsEmpty]: Start isEmpty. Operand 125525 states and 132817 transitions. [2020-12-22 01:52:47,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2020-12-22 01:52:47,768 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:52:47,768 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 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] [2020-12-22 01:52:47,769 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 01:52:47,769 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:52:47,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:52:47,770 INFO L82 PathProgramCache]: Analyzing trace with hash -1374432775, now seen corresponding path program 1 times [2020-12-22 01:52:47,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:52:47,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265884199] [2020-12-22 01:52:47,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:52:47,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:52:48,716 INFO L134 CoverageAnalysis]: Checked inductivity of 657 backedges. 385 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2020-12-22 01:52:48,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265884199] [2020-12-22 01:52:48,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:52:48,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 01:52:48,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862881530] [2020-12-22 01:52:48,722 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:52:48,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:52:48,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:52:48,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:52:48,724 INFO L87 Difference]: Start difference. First operand 125525 states and 132817 transitions. Second operand 3 states.