/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_opt-floodmax.3.2.ufo.BOUNDED-6.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 07:39:29,739 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 07:39:29,743 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 07:39:29,802 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 07:39:29,803 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 07:39:29,808 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 07:39:29,812 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 07:39:29,820 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 07:39:29,826 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 07:39:29,835 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 07:39:29,836 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 07:39:29,839 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 07:39:29,840 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 07:39:29,843 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 07:39:29,846 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 07:39:29,848 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 07:39:29,849 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 07:39:29,853 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 07:39:29,860 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 07:39:29,868 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 07:39:29,870 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 07:39:29,872 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 07:39:29,874 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 07:39:29,875 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 07:39:29,890 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 07:39:29,901 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 07:39:29,902 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 07:39:29,903 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 07:39:29,904 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 07:39:29,935 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 07:39:29,935 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 07:39:29,937 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 07:39:29,937 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 07:39:29,937 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 07:39:29,938 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 07:39:29,938 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 07:39:29,938 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 07:39:29,938 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 07:39:29,939 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 07:39:29,939 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 07:39:29,939 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 07:39:29,939 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 07:39:29,940 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 07:39:29,940 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 07:39:29,940 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 07:39:29,940 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 07:39:29,941 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 07:39:29,941 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 07:39:29,941 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 07:39:29,941 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 07:39:29,942 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 07:39:29,942 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 07:39:29,942 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 07:39:29,942 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 07:39:29,942 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 07:39:30,347 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 07:39:30,387 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 07:39:30,390 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 07:39:30,391 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 07:39:30,392 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 07:39:30,393 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.3.2.ufo.BOUNDED-6.pals.c [2020-12-22 07:39:30,484 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dfdcb7458/98fa21ba0cb946269b4f83e9152096d9/FLAGfe85e7744 [2020-12-22 07:39:31,152 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 07:39:31,153 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.3.2.ufo.BOUNDED-6.pals.c [2020-12-22 07:39:31,174 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dfdcb7458/98fa21ba0cb946269b4f83e9152096d9/FLAGfe85e7744 [2020-12-22 07:39:31,465 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dfdcb7458/98fa21ba0cb946269b4f83e9152096d9 [2020-12-22 07:39:31,468 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 07:39:31,471 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 07:39:31,473 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 07:39:31,473 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 07:39:31,477 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 07:39:31,478 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:39:31" (1/1) ... [2020-12-22 07:39:31,480 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c3e76c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:39:31, skipping insertion in model container [2020-12-22 07:39:31,480 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:39:31" (1/1) ... [2020-12-22 07:39:31,489 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 07:39:31,528 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 07:39:31,809 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_opt-floodmax.3.2.ufo.BOUNDED-6.pals.c[14373,14386] [2020-12-22 07:39:31,813 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:39:31,826 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 07:39:31,899 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_opt-floodmax.3.2.ufo.BOUNDED-6.pals.c[14373,14386] [2020-12-22 07:39:31,899 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:39:31,921 INFO L208 MainTranslator]: Completed translation [2020-12-22 07:39:31,922 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:39:31 WrapperNode [2020-12-22 07:39:31,922 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 07:39:31,923 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 07:39:31,924 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 07:39:31,924 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 07:39:31,933 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:39:31" (1/1) ... [2020-12-22 07:39:31,948 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:39:31" (1/1) ... [2020-12-22 07:39:31,991 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 07:39:31,995 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 07:39:31,995 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 07:39:31,995 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 07:39:32,009 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:39:31" (1/1) ... [2020-12-22 07:39:32,010 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:39:31" (1/1) ... [2020-12-22 07:39:32,016 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:39:31" (1/1) ... [2020-12-22 07:39:32,016 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:39:31" (1/1) ... [2020-12-22 07:39:32,027 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:39:31" (1/1) ... [2020-12-22 07:39:32,037 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:39:31" (1/1) ... [2020-12-22 07:39:32,042 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:39:31" (1/1) ... [2020-12-22 07:39:32,048 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 07:39:32,050 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 07:39:32,050 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 07:39:32,050 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 07:39:32,051 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:39:31" (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 07:39:32,178 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 07:39:32,179 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 07:39:32,179 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 07:39:32,179 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 07:39:33,306 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 07:39:33,307 INFO L299 CfgBuilder]: Removed 19 assume(true) statements. [2020-12-22 07:39:33,309 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:39:33 BoogieIcfgContainer [2020-12-22 07:39:33,309 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 07:39:33,312 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 07:39:33,312 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 07:39:33,316 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 07:39:33,316 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 07:39:31" (1/3) ... [2020-12-22 07:39:33,317 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b79687a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:39:33, skipping insertion in model container [2020-12-22 07:39:33,318 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:39:31" (2/3) ... [2020-12-22 07:39:33,318 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b79687a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:39:33, skipping insertion in model container [2020-12-22 07:39:33,318 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:39:33" (3/3) ... [2020-12-22 07:39:33,320 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.2.ufo.BOUNDED-6.pals.c [2020-12-22 07:39:33,328 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 07:39:33,334 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 07:39:33,355 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 07:39:33,386 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 07:39:33,386 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 07:39:33,386 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 07:39:33,387 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 07:39:33,387 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 07:39:33,387 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 07:39:33,387 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 07:39:33,387 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 07:39:33,407 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states. [2020-12-22 07:39:33,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-22 07:39:33,417 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:39:33,418 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 07:39:33,419 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:39:33,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:39:33,426 INFO L82 PathProgramCache]: Analyzing trace with hash -1418405445, now seen corresponding path program 1 times [2020-12-22 07:39:33,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:39:33,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922458093] [2020-12-22 07:39:33,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:39:33,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:39:33,781 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 07:39:33,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922458093] [2020-12-22 07:39:33,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:39:33,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:39:33,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056672089] [2020-12-22 07:39:33,792 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 07:39:33,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:39:33,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 07:39:33,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 07:39:33,809 INFO L87 Difference]: Start difference. First operand 143 states. Second operand 2 states. [2020-12-22 07:39:33,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:39:33,844 INFO L93 Difference]: Finished difference Result 227 states and 388 transitions. [2020-12-22 07:39:33,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 07:39:33,846 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 37 [2020-12-22 07:39:33,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:39:33,860 INFO L225 Difference]: With dead ends: 227 [2020-12-22 07:39:33,861 INFO L226 Difference]: Without dead ends: 139 [2020-12-22 07:39:33,865 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 07:39:33,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-12-22 07:39:33,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2020-12-22 07:39:33,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-12-22 07:39:33,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 241 transitions. [2020-12-22 07:39:33,921 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 241 transitions. Word has length 37 [2020-12-22 07:39:33,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:39:33,922 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 241 transitions. [2020-12-22 07:39:33,922 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 07:39:33,922 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 241 transitions. [2020-12-22 07:39:33,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-22 07:39:33,925 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:39:33,925 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 07:39:33,926 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 07:39:33,926 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:39:33,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:39:33,927 INFO L82 PathProgramCache]: Analyzing trace with hash 2058913401, now seen corresponding path program 1 times [2020-12-22 07:39:33,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:39:33,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917966427] [2020-12-22 07:39:33,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:39:34,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:39:34,180 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 07:39:34,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917966427] [2020-12-22 07:39:34,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:39:34,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:39:34,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574949113] [2020-12-22 07:39:34,185 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:39:34,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:39:34,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:39:34,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:39:34,187 INFO L87 Difference]: Start difference. First operand 139 states and 241 transitions. Second operand 5 states. [2020-12-22 07:39:34,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:39:34,298 INFO L93 Difference]: Finished difference Result 222 states and 378 transitions. [2020-12-22 07:39:34,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 07:39:34,299 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 37 [2020-12-22 07:39:34,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:39:34,301 INFO L225 Difference]: With dead ends: 222 [2020-12-22 07:39:34,301 INFO L226 Difference]: Without dead ends: 139 [2020-12-22 07:39:34,303 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 07:39:34,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-12-22 07:39:34,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2020-12-22 07:39:34,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-12-22 07:39:34,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 211 transitions. [2020-12-22 07:39:34,316 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 211 transitions. Word has length 37 [2020-12-22 07:39:34,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:39:34,316 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 211 transitions. [2020-12-22 07:39:34,316 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:39:34,317 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 211 transitions. [2020-12-22 07:39:34,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 07:39:34,319 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:39:34,319 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:39:34,320 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 07:39:34,320 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:39:34,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:39:34,321 INFO L82 PathProgramCache]: Analyzing trace with hash -415118785, now seen corresponding path program 1 times [2020-12-22 07:39:34,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:39:34,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010923656] [2020-12-22 07:39:34,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:39:34,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:39:34,511 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 07:39:34,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010923656] [2020-12-22 07:39:34,512 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:39:34,512 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:39:34,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379467052] [2020-12-22 07:39:34,513 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:39:34,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:39:34,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:39:34,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:39:34,515 INFO L87 Difference]: Start difference. First operand 139 states and 211 transitions. Second operand 3 states. [2020-12-22 07:39:34,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:39:34,576 INFO L93 Difference]: Finished difference Result 287 states and 459 transitions. [2020-12-22 07:39:34,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:39:34,576 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 66 [2020-12-22 07:39:34,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:39:34,582 INFO L225 Difference]: With dead ends: 287 [2020-12-22 07:39:34,582 INFO L226 Difference]: Without dead ends: 208 [2020-12-22 07:39:34,583 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 07:39:34,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-12-22 07:39:34,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 206. [2020-12-22 07:39:34,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-12-22 07:39:34,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 320 transitions. [2020-12-22 07:39:34,621 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 320 transitions. Word has length 66 [2020-12-22 07:39:34,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:39:34,622 INFO L481 AbstractCegarLoop]: Abstraction has 206 states and 320 transitions. [2020-12-22 07:39:34,622 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:39:34,622 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 320 transitions. [2020-12-22 07:39:34,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 07:39:34,629 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:39:34,630 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:39:34,630 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 07:39:34,631 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:39:34,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:39:34,633 INFO L82 PathProgramCache]: Analyzing trace with hash 928134868, now seen corresponding path program 1 times [2020-12-22 07:39:34,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:39:34,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142332654] [2020-12-22 07:39:34,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:39:34,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:39:34,811 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 07:39:34,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142332654] [2020-12-22 07:39:34,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:39:34,812 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:39:34,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114668823] [2020-12-22 07:39:34,813 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:39:34,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:39:34,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:39:34,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:39:34,815 INFO L87 Difference]: Start difference. First operand 206 states and 320 transitions. Second operand 3 states. [2020-12-22 07:39:34,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:39:34,849 INFO L93 Difference]: Finished difference Result 482 states and 776 transitions. [2020-12-22 07:39:34,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:39:34,850 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 68 [2020-12-22 07:39:34,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:39:34,853 INFO L225 Difference]: With dead ends: 482 [2020-12-22 07:39:34,853 INFO L226 Difference]: Without dead ends: 336 [2020-12-22 07:39:34,855 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 07:39:34,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2020-12-22 07:39:34,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 334. [2020-12-22 07:39:34,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 334 states. [2020-12-22 07:39:34,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 531 transitions. [2020-12-22 07:39:34,898 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 531 transitions. Word has length 68 [2020-12-22 07:39:34,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:39:34,900 INFO L481 AbstractCegarLoop]: Abstraction has 334 states and 531 transitions. [2020-12-22 07:39:34,900 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:39:34,900 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 531 transitions. [2020-12-22 07:39:34,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-22 07:39:34,904 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:39:34,904 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:39:34,904 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 07:39:34,904 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:39:34,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:39:34,908 INFO L82 PathProgramCache]: Analyzing trace with hash 1295175881, now seen corresponding path program 1 times [2020-12-22 07:39:34,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:39:34,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552744681] [2020-12-22 07:39:34,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:39:34,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:39:35,073 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 07:39:35,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552744681] [2020-12-22 07:39:35,074 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:39:35,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:39:35,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381588653] [2020-12-22 07:39:35,076 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:39:35,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:39:35,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:39:35,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:39:35,077 INFO L87 Difference]: Start difference. First operand 334 states and 531 transitions. Second operand 3 states. [2020-12-22 07:39:35,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:39:35,149 INFO L93 Difference]: Finished difference Result 850 states and 1381 transitions. [2020-12-22 07:39:35,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:39:35,149 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 70 [2020-12-22 07:39:35,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:39:35,154 INFO L225 Difference]: With dead ends: 850 [2020-12-22 07:39:35,154 INFO L226 Difference]: Without dead ends: 576 [2020-12-22 07:39:35,156 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 07:39:35,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2020-12-22 07:39:35,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 574. [2020-12-22 07:39:35,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 574 states. [2020-12-22 07:39:35,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 923 transitions. [2020-12-22 07:39:35,205 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 923 transitions. Word has length 70 [2020-12-22 07:39:35,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:39:35,207 INFO L481 AbstractCegarLoop]: Abstraction has 574 states and 923 transitions. [2020-12-22 07:39:35,208 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:39:35,208 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 923 transitions. [2020-12-22 07:39:35,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-22 07:39:35,210 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:39:35,210 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:39:35,210 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 07:39:35,211 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:39:35,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:39:35,211 INFO L82 PathProgramCache]: Analyzing trace with hash -367652834, now seen corresponding path program 1 times [2020-12-22 07:39:35,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:39:35,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857496699] [2020-12-22 07:39:35,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:39:35,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:39:35,386 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 07:39:35,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857496699] [2020-12-22 07:39:35,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:39:35,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:39:35,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382136823] [2020-12-22 07:39:35,389 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:39:35,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:39:35,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:39:35,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:39:35,391 INFO L87 Difference]: Start difference. First operand 574 states and 923 transitions. Second operand 5 states. [2020-12-22 07:39:35,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:39:35,595 INFO L93 Difference]: Finished difference Result 2176 states and 3592 transitions. [2020-12-22 07:39:35,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:39:35,595 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 72 [2020-12-22 07:39:35,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:39:35,606 INFO L225 Difference]: With dead ends: 2176 [2020-12-22 07:39:35,607 INFO L226 Difference]: Without dead ends: 1662 [2020-12-22 07:39:35,609 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:39:35,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1662 states. [2020-12-22 07:39:35,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1662 to 1023. [2020-12-22 07:39:35,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1023 states. [2020-12-22 07:39:35,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1023 states to 1023 states and 1661 transitions. [2020-12-22 07:39:35,668 INFO L78 Accepts]: Start accepts. Automaton has 1023 states and 1661 transitions. Word has length 72 [2020-12-22 07:39:35,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:39:35,668 INFO L481 AbstractCegarLoop]: Abstraction has 1023 states and 1661 transitions. [2020-12-22 07:39:35,668 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:39:35,669 INFO L276 IsEmpty]: Start isEmpty. Operand 1023 states and 1661 transitions. [2020-12-22 07:39:35,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-12-22 07:39:35,671 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:39:35,671 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:39:35,671 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 07:39:35,671 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:39:35,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:39:35,673 INFO L82 PathProgramCache]: Analyzing trace with hash -435168554, now seen corresponding path program 1 times [2020-12-22 07:39:35,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:39:35,678 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27482471] [2020-12-22 07:39:35,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:39:35,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:39:35,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:39:35,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27482471] [2020-12-22 07:39:35,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:39:35,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:39:35,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962952723] [2020-12-22 07:39:35,796 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:39:35,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:39:35,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:39:35,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:39:35,797 INFO L87 Difference]: Start difference. First operand 1023 states and 1661 transitions. Second operand 4 states. [2020-12-22 07:39:35,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:39:35,944 INFO L93 Difference]: Finished difference Result 2972 states and 4898 transitions. [2020-12-22 07:39:35,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:39:35,944 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 73 [2020-12-22 07:39:35,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:39:35,956 INFO L225 Difference]: With dead ends: 2972 [2020-12-22 07:39:35,956 INFO L226 Difference]: Without dead ends: 2009 [2020-12-22 07:39:35,959 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:39:35,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2009 states. [2020-12-22 07:39:36,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2009 to 1507. [2020-12-22 07:39:36,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1507 states. [2020-12-22 07:39:36,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1507 states to 1507 states and 2459 transitions. [2020-12-22 07:39:36,039 INFO L78 Accepts]: Start accepts. Automaton has 1507 states and 2459 transitions. Word has length 73 [2020-12-22 07:39:36,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:39:36,039 INFO L481 AbstractCegarLoop]: Abstraction has 1507 states and 2459 transitions. [2020-12-22 07:39:36,039 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:39:36,039 INFO L276 IsEmpty]: Start isEmpty. Operand 1507 states and 2459 transitions. [2020-12-22 07:39:36,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-12-22 07:39:36,042 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:39:36,042 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] [2020-12-22 07:39:36,043 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 07:39:36,043 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:39:36,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:39:36,043 INFO L82 PathProgramCache]: Analyzing trace with hash 152415701, now seen corresponding path program 1 times [2020-12-22 07:39:36,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:39:36,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081515046] [2020-12-22 07:39:36,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:39:36,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:39:36,109 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 07:39:36,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081515046] [2020-12-22 07:39:36,110 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:39:36,110 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:39:36,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531471063] [2020-12-22 07:39:36,111 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:39:36,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:39:36,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:39:36,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:39:36,112 INFO L87 Difference]: Start difference. First operand 1507 states and 2459 transitions. Second operand 3 states. [2020-12-22 07:39:36,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:39:36,185 INFO L93 Difference]: Finished difference Result 2973 states and 4868 transitions. [2020-12-22 07:39:36,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:39:36,186 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 74 [2020-12-22 07:39:36,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:39:36,198 INFO L225 Difference]: With dead ends: 2973 [2020-12-22 07:39:36,199 INFO L226 Difference]: Without dead ends: 2147 [2020-12-22 07:39:36,201 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 07:39:36,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2147 states. [2020-12-22 07:39:36,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2147 to 2145. [2020-12-22 07:39:36,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2145 states. [2020-12-22 07:39:36,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2145 states to 2145 states and 3484 transitions. [2020-12-22 07:39:36,293 INFO L78 Accepts]: Start accepts. Automaton has 2145 states and 3484 transitions. Word has length 74 [2020-12-22 07:39:36,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:39:36,294 INFO L481 AbstractCegarLoop]: Abstraction has 2145 states and 3484 transitions. [2020-12-22 07:39:36,294 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:39:36,294 INFO L276 IsEmpty]: Start isEmpty. Operand 2145 states and 3484 transitions. [2020-12-22 07:39:36,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-12-22 07:39:36,295 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:39:36,295 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] [2020-12-22 07:39:36,296 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 07:39:36,316 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:39:36,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:39:36,317 INFO L82 PathProgramCache]: Analyzing trace with hash 1935815765, now seen corresponding path program 1 times [2020-12-22 07:39:36,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:39:36,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576514654] [2020-12-22 07:39:36,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:39:36,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:39:36,376 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 07:39:36,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576514654] [2020-12-22 07:39:36,377 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:39:36,377 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:39:36,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581943395] [2020-12-22 07:39:36,378 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:39:36,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:39:36,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:39:36,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:39:36,379 INFO L87 Difference]: Start difference. First operand 2145 states and 3484 transitions. Second operand 4 states. [2020-12-22 07:39:36,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:39:36,578 INFO L93 Difference]: Finished difference Result 6648 states and 10865 transitions. [2020-12-22 07:39:36,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:39:36,579 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 74 [2020-12-22 07:39:36,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:39:36,604 INFO L225 Difference]: With dead ends: 6648 [2020-12-22 07:39:36,604 INFO L226 Difference]: Without dead ends: 4593 [2020-12-22 07:39:36,609 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:39:36,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4593 states. [2020-12-22 07:39:36,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4593 to 3357. [2020-12-22 07:39:36,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3357 states. [2020-12-22 07:39:36,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3357 states to 3357 states and 5442 transitions. [2020-12-22 07:39:36,845 INFO L78 Accepts]: Start accepts. Automaton has 3357 states and 5442 transitions. Word has length 74 [2020-12-22 07:39:36,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:39:36,846 INFO L481 AbstractCegarLoop]: Abstraction has 3357 states and 5442 transitions. [2020-12-22 07:39:36,846 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:39:36,846 INFO L276 IsEmpty]: Start isEmpty. Operand 3357 states and 5442 transitions. [2020-12-22 07:39:36,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-12-22 07:39:36,847 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:39:36,847 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] [2020-12-22 07:39:36,848 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 07:39:36,848 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:39:36,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:39:36,848 INFO L82 PathProgramCache]: Analyzing trace with hash -2130170379, now seen corresponding path program 1 times [2020-12-22 07:39:36,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:39:36,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692484650] [2020-12-22 07:39:36,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:39:36,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:39:36,901 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 07:39:36,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692484650] [2020-12-22 07:39:36,902 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:39:36,902 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:39:36,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674373827] [2020-12-22 07:39:36,903 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:39:36,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:39:36,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:39:36,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:39:36,904 INFO L87 Difference]: Start difference. First operand 3357 states and 5442 transitions. Second operand 3 states. [2020-12-22 07:39:37,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:39:37,058 INFO L93 Difference]: Finished difference Result 6689 states and 10862 transitions. [2020-12-22 07:39:37,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:39:37,059 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 74 [2020-12-22 07:39:37,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:39:37,085 INFO L225 Difference]: With dead ends: 6689 [2020-12-22 07:39:37,085 INFO L226 Difference]: Without dead ends: 4777 [2020-12-22 07:39:37,090 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 07:39:37,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4777 states. [2020-12-22 07:39:37,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4777 to 4775. [2020-12-22 07:39:37,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4775 states. [2020-12-22 07:39:37,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4775 states to 4775 states and 7690 transitions. [2020-12-22 07:39:37,360 INFO L78 Accepts]: Start accepts. Automaton has 4775 states and 7690 transitions. Word has length 74 [2020-12-22 07:39:37,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:39:37,360 INFO L481 AbstractCegarLoop]: Abstraction has 4775 states and 7690 transitions. [2020-12-22 07:39:37,360 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:39:37,361 INFO L276 IsEmpty]: Start isEmpty. Operand 4775 states and 7690 transitions. [2020-12-22 07:39:37,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-12-22 07:39:37,362 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:39:37,362 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] [2020-12-22 07:39:37,362 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 07:39:37,363 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:39:37,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:39:37,363 INFO L82 PathProgramCache]: Analyzing trace with hash 339461557, now seen corresponding path program 1 times [2020-12-22 07:39:37,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:39:37,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656874038] [2020-12-22 07:39:37,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:39:37,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:39:37,426 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 07:39:37,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656874038] [2020-12-22 07:39:37,427 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:39:37,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:39:37,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237516219] [2020-12-22 07:39:37,428 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:39:37,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:39:37,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:39:37,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:39:37,431 INFO L87 Difference]: Start difference. First operand 4775 states and 7690 transitions. Second operand 3 states. [2020-12-22 07:39:37,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:39:37,667 INFO L93 Difference]: Finished difference Result 10486 states and 17043 transitions. [2020-12-22 07:39:37,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:39:37,667 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 74 [2020-12-22 07:39:37,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:39:37,729 INFO L225 Difference]: With dead ends: 10486 [2020-12-22 07:39:37,730 INFO L226 Difference]: Without dead ends: 7079 [2020-12-22 07:39:37,738 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 07:39:37,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7079 states. [2020-12-22 07:39:38,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7079 to 7077. [2020-12-22 07:39:38,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7077 states. [2020-12-22 07:39:38,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7077 states to 7077 states and 11375 transitions. [2020-12-22 07:39:38,114 INFO L78 Accepts]: Start accepts. Automaton has 7077 states and 11375 transitions. Word has length 74 [2020-12-22 07:39:38,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:39:38,114 INFO L481 AbstractCegarLoop]: Abstraction has 7077 states and 11375 transitions. [2020-12-22 07:39:38,114 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:39:38,114 INFO L276 IsEmpty]: Start isEmpty. Operand 7077 states and 11375 transitions. [2020-12-22 07:39:38,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-12-22 07:39:38,115 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:39:38,115 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] [2020-12-22 07:39:38,116 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 07:39:38,116 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:39:38,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:39:38,117 INFO L82 PathProgramCache]: Analyzing trace with hash -1704077331, now seen corresponding path program 1 times [2020-12-22 07:39:38,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:39:38,118 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425452006] [2020-12-22 07:39:38,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:39:38,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:39:38,241 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 07:39:38,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425452006] [2020-12-22 07:39:38,242 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:39:38,242 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:39:38,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722547585] [2020-12-22 07:39:38,243 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:39:38,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:39:38,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:39:38,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:39:38,244 INFO L87 Difference]: Start difference. First operand 7077 states and 11375 transitions. Second operand 4 states. [2020-12-22 07:39:38,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:39:38,796 INFO L93 Difference]: Finished difference Result 22184 states and 35744 transitions. [2020-12-22 07:39:38,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:39:38,796 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 75 [2020-12-22 07:39:38,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:39:38,907 INFO L225 Difference]: With dead ends: 22184 [2020-12-22 07:39:38,907 INFO L226 Difference]: Without dead ends: 15193 [2020-12-22 07:39:38,918 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 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 07:39:38,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15193 states. [2020-12-22 07:39:39,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15193 to 11092. [2020-12-22 07:39:39,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11092 states. [2020-12-22 07:39:39,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11092 states to 11092 states and 17724 transitions. [2020-12-22 07:39:39,526 INFO L78 Accepts]: Start accepts. Automaton has 11092 states and 17724 transitions. Word has length 75 [2020-12-22 07:39:39,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:39:39,526 INFO L481 AbstractCegarLoop]: Abstraction has 11092 states and 17724 transitions. [2020-12-22 07:39:39,527 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:39:39,527 INFO L276 IsEmpty]: Start isEmpty. Operand 11092 states and 17724 transitions. [2020-12-22 07:39:39,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 07:39:39,528 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:39:39,528 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] [2020-12-22 07:39:39,528 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 07:39:39,528 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:39:39,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:39:39,529 INFO L82 PathProgramCache]: Analyzing trace with hash 931672261, now seen corresponding path program 1 times [2020-12-22 07:39:39,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:39:39,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906159041] [2020-12-22 07:39:39,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:39:39,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:39:39,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:39:39,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906159041] [2020-12-22 07:39:39,659 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:39:39,659 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:39:39,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299432238] [2020-12-22 07:39:39,660 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:39:39,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:39:39,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:39:39,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:39:39,661 INFO L87 Difference]: Start difference. First operand 11092 states and 17724 transitions. Second operand 4 states. [2020-12-22 07:39:40,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:39:40,524 INFO L93 Difference]: Finished difference Result 32771 states and 52300 transitions. [2020-12-22 07:39:40,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:39:40,525 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 77 [2020-12-22 07:39:40,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:39:40,589 INFO L225 Difference]: With dead ends: 32771 [2020-12-22 07:39:40,590 INFO L226 Difference]: Without dead ends: 21688 [2020-12-22 07:39:40,613 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 07:39:40,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21688 states. [2020-12-22 07:39:41,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21688 to 21686. [2020-12-22 07:39:41,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21686 states. [2020-12-22 07:39:41,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21686 states to 21686 states and 34364 transitions. [2020-12-22 07:39:41,726 INFO L78 Accepts]: Start accepts. Automaton has 21686 states and 34364 transitions. Word has length 77 [2020-12-22 07:39:41,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:39:41,726 INFO L481 AbstractCegarLoop]: Abstraction has 21686 states and 34364 transitions. [2020-12-22 07:39:41,726 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:39:41,726 INFO L276 IsEmpty]: Start isEmpty. Operand 21686 states and 34364 transitions. [2020-12-22 07:39:41,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 07:39:41,727 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:39:41,728 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 07:39:41,728 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 07:39:41,728 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:39:41,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:39:41,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1466579386, now seen corresponding path program 1 times [2020-12-22 07:39:41,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:39:41,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858019746] [2020-12-22 07:39:41,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:39:41,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:39:41,880 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 07:39:41,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858019746] [2020-12-22 07:39:41,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:39:41,881 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:39:41,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132195826] [2020-12-22 07:39:41,882 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:39:41,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:39:41,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:39:41,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:39:41,883 INFO L87 Difference]: Start difference. First operand 21686 states and 34364 transitions. Second operand 3 states. [2020-12-22 07:39:43,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:39:43,093 INFO L93 Difference]: Finished difference Result 52581 states and 83824 transitions. [2020-12-22 07:39:43,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:39:43,094 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 78 [2020-12-22 07:39:43,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:39:43,194 INFO L225 Difference]: With dead ends: 52581 [2020-12-22 07:39:43,195 INFO L226 Difference]: Without dead ends: 31024 [2020-12-22 07:39:43,223 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 07:39:43,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31024 states. [2020-12-22 07:39:44,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31024 to 30112. [2020-12-22 07:39:44,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30112 states. [2020-12-22 07:39:44,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30112 states to 30112 states and 47587 transitions. [2020-12-22 07:39:44,559 INFO L78 Accepts]: Start accepts. Automaton has 30112 states and 47587 transitions. Word has length 78 [2020-12-22 07:39:44,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:39:44,560 INFO L481 AbstractCegarLoop]: Abstraction has 30112 states and 47587 transitions. [2020-12-22 07:39:44,560 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:39:44,560 INFO L276 IsEmpty]: Start isEmpty. Operand 30112 states and 47587 transitions. [2020-12-22 07:39:44,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 07:39:44,561 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:39:44,561 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 07:39:44,561 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 07:39:44,562 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:39:44,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:39:44,562 INFO L82 PathProgramCache]: Analyzing trace with hash 295226641, now seen corresponding path program 1 times [2020-12-22 07:39:44,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:39:44,563 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717196220] [2020-12-22 07:39:44,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:39:44,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:39:44,596 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 07:39:44,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717196220] [2020-12-22 07:39:44,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:39:44,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:39:44,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121814744] [2020-12-22 07:39:44,598 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:39:44,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:39:44,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:39:44,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:39:44,600 INFO L87 Difference]: Start difference. First operand 30112 states and 47587 transitions. Second operand 3 states. [2020-12-22 07:39:46,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:39:46,766 INFO L93 Difference]: Finished difference Result 90298 states and 142699 transitions. [2020-12-22 07:39:46,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:39:46,767 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 78 [2020-12-22 07:39:46,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:39:46,926 INFO L225 Difference]: With dead ends: 90298 [2020-12-22 07:39:46,927 INFO L226 Difference]: Without dead ends: 60214 [2020-12-22 07:39:46,969 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 07:39:47,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60214 states. [2020-12-22 07:39:48,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60214 to 30114. [2020-12-22 07:39:48,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30114 states. [2020-12-22 07:39:48,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30114 states to 30114 states and 47589 transitions. [2020-12-22 07:39:48,542 INFO L78 Accepts]: Start accepts. Automaton has 30114 states and 47589 transitions. Word has length 78 [2020-12-22 07:39:48,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:39:48,542 INFO L481 AbstractCegarLoop]: Abstraction has 30114 states and 47589 transitions. [2020-12-22 07:39:48,542 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:39:48,542 INFO L276 IsEmpty]: Start isEmpty. Operand 30114 states and 47589 transitions. [2020-12-22 07:39:48,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 07:39:48,543 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:39:48,544 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 07:39:48,544 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 07:39:48,544 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:39:48,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:39:48,545 INFO L82 PathProgramCache]: Analyzing trace with hash -57061967, now seen corresponding path program 1 times [2020-12-22 07:39:48,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:39:48,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385979689] [2020-12-22 07:39:48,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:39:48,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:39:48,810 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 07:39:48,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385979689] [2020-12-22 07:39:48,811 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:39:48,811 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:39:48,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614107737] [2020-12-22 07:39:48,812 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:39:48,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:39:48,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:39:48,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:39:48,813 INFO L87 Difference]: Start difference. First operand 30114 states and 47589 transitions. Second operand 4 states. [2020-12-22 07:39:50,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:39:50,589 INFO L93 Difference]: Finished difference Result 88984 states and 140445 transitions. [2020-12-22 07:39:50,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:39:50,590 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 79 [2020-12-22 07:39:50,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:39:50,720 INFO L225 Difference]: With dead ends: 88984 [2020-12-22 07:39:50,720 INFO L226 Difference]: Without dead ends: 58900 [2020-12-22 07:39:50,757 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 07:39:50,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58900 states. [2020-12-22 07:39:52,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58900 to 58898. [2020-12-22 07:39:52,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58898 states. [2020-12-22 07:39:52,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58898 states to 58898 states and 92344 transitions. [2020-12-22 07:39:52,995 INFO L78 Accepts]: Start accepts. Automaton has 58898 states and 92344 transitions. Word has length 79 [2020-12-22 07:39:52,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:39:52,996 INFO L481 AbstractCegarLoop]: Abstraction has 58898 states and 92344 transitions. [2020-12-22 07:39:52,996 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:39:52,996 INFO L276 IsEmpty]: Start isEmpty. Operand 58898 states and 92344 transitions. [2020-12-22 07:39:52,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 07:39:52,998 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:39:52,998 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 07:39:52,998 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 07:39:52,999 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:39:52,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:39:52,999 INFO L82 PathProgramCache]: Analyzing trace with hash -1163177193, now seen corresponding path program 1 times [2020-12-22 07:39:52,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:39:53,000 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197986395] [2020-12-22 07:39:53,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:39:53,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:39:53,055 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 07:39:53,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197986395] [2020-12-22 07:39:53,055 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:39:53,056 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:39:53,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294054171] [2020-12-22 07:39:53,056 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:39:53,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:39:53,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:39:53,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:39:53,057 INFO L87 Difference]: Start difference. First operand 58898 states and 92344 transitions. Second operand 3 states. [2020-12-22 07:39:55,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:39:55,710 INFO L93 Difference]: Finished difference Result 142466 states and 224208 transitions. [2020-12-22 07:39:55,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:39:55,711 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 80 [2020-12-22 07:39:55,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:39:55,968 INFO L225 Difference]: With dead ends: 142466 [2020-12-22 07:39:55,968 INFO L226 Difference]: Without dead ends: 83848 [2020-12-22 07:39:56,061 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 07:39:56,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83848 states. [2020-12-22 07:39:59,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83848 to 81542. [2020-12-22 07:39:59,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81542 states. [2020-12-22 07:39:59,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81542 states to 81542 states and 127246 transitions. [2020-12-22 07:39:59,390 INFO L78 Accepts]: Start accepts. Automaton has 81542 states and 127246 transitions. Word has length 80 [2020-12-22 07:39:59,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:39:59,390 INFO L481 AbstractCegarLoop]: Abstraction has 81542 states and 127246 transitions. [2020-12-22 07:39:59,390 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:39:59,390 INFO L276 IsEmpty]: Start isEmpty. Operand 81542 states and 127246 transitions. [2020-12-22 07:39:59,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 07:39:59,392 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:39:59,392 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 07:39:59,392 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 07:39:59,392 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:39:59,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:39:59,393 INFO L82 PathProgramCache]: Analyzing trace with hash -544448643, now seen corresponding path program 1 times [2020-12-22 07:39:59,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:39:59,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317763858] [2020-12-22 07:39:59,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:39:59,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:39:59,432 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 07:39:59,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317763858] [2020-12-22 07:39:59,432 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:39:59,433 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:39:59,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474482246] [2020-12-22 07:39:59,435 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:39:59,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:39:59,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:39:59,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:39:59,436 INFO L87 Difference]: Start difference. First operand 81542 states and 127246 transitions. Second operand 3 states. [2020-12-22 07:40:04,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:40:04,508 INFO L93 Difference]: Finished difference Result 244550 states and 381618 transitions. [2020-12-22 07:40:04,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:40:04,509 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 80 [2020-12-22 07:40:04,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:40:04,846 INFO L225 Difference]: With dead ends: 244550 [2020-12-22 07:40:04,847 INFO L226 Difference]: Without dead ends: 163052 [2020-12-22 07:40:04,932 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 07:40:05,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163052 states. [2020-12-22 07:40:08,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163052 to 81546. [2020-12-22 07:40:08,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81546 states. [2020-12-22 07:40:08,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81546 states to 81546 states and 127250 transitions. [2020-12-22 07:40:08,950 INFO L78 Accepts]: Start accepts. Automaton has 81546 states and 127250 transitions. Word has length 80 [2020-12-22 07:40:08,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:40:08,950 INFO L481 AbstractCegarLoop]: Abstraction has 81546 states and 127250 transitions. [2020-12-22 07:40:08,950 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:40:08,950 INFO L276 IsEmpty]: Start isEmpty. Operand 81546 states and 127250 transitions. [2020-12-22 07:40:08,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 07:40:08,952 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:40:08,952 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:40:08,952 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 07:40:08,952 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:40:08,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:40:08,953 INFO L82 PathProgramCache]: Analyzing trace with hash 2051256477, now seen corresponding path program 1 times [2020-12-22 07:40:08,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:40:08,953 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654070762] [2020-12-22 07:40:08,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:40:08,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:40:09,257 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 07:40:09,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654070762] [2020-12-22 07:40:09,258 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:40:09,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:40:09,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026088493] [2020-12-22 07:40:09,260 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:40:09,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:40:09,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:40:09,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:40:09,261 INFO L87 Difference]: Start difference. First operand 81546 states and 127250 transitions. Second operand 4 states. [2020-12-22 07:40:14,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:40:14,645 INFO L93 Difference]: Finished difference Result 240890 states and 375346 transitions. [2020-12-22 07:40:14,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:40:14,645 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 81 [2020-12-22 07:40:14,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:40:15,106 INFO L225 Difference]: With dead ends: 240890 [2020-12-22 07:40:15,107 INFO L226 Difference]: Without dead ends: 159392 [2020-12-22 07:40:15,193 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 07:40:15,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159392 states. [2020-12-22 07:40:21,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159392 to 159390. [2020-12-22 07:40:21,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159390 states. [2020-12-22 07:40:21,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159390 states to 159390 states and 246600 transitions. [2020-12-22 07:40:21,649 INFO L78 Accepts]: Start accepts. Automaton has 159390 states and 246600 transitions. Word has length 81 [2020-12-22 07:40:21,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:40:21,649 INFO L481 AbstractCegarLoop]: Abstraction has 159390 states and 246600 transitions. [2020-12-22 07:40:21,649 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:40:21,649 INFO L276 IsEmpty]: Start isEmpty. Operand 159390 states and 246600 transitions. [2020-12-22 07:40:21,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 07:40:21,651 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:40:21,651 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:40:21,652 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 07:40:21,652 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:40:21,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:40:21,655 INFO L82 PathProgramCache]: Analyzing trace with hash -2106822348, now seen corresponding path program 1 times [2020-12-22 07:40:21,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:40:21,655 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054953267] [2020-12-22 07:40:21,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:40:21,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:40:21,723 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 07:40:21,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054953267] [2020-12-22 07:40:21,723 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:40:21,723 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:40:21,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422258159] [2020-12-22 07:40:21,724 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:40:21,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:40:21,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:40:21,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:40:21,725 INFO L87 Difference]: Start difference. First operand 159390 states and 246600 transitions. Second operand 3 states. [2020-12-22 07:40:29,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:40:29,984 INFO L93 Difference]: Finished difference Result 386314 states and 600650 transitions. [2020-12-22 07:40:29,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:40:29,984 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 82 [2020-12-22 07:40:29,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:40:30,490 INFO L225 Difference]: With dead ends: 386314 [2020-12-22 07:40:30,491 INFO L226 Difference]: Without dead ends: 227488 [2020-12-22 07:40:30,606 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 07:40:30,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227488 states. [2020-12-22 07:40:39,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227488 to 220286. [2020-12-22 07:40:39,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220286 states. [2020-12-22 07:40:40,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220286 states to 220286 states and 338608 transitions. [2020-12-22 07:40:40,539 INFO L78 Accepts]: Start accepts. Automaton has 220286 states and 338608 transitions. Word has length 82 [2020-12-22 07:40:40,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:40:40,539 INFO L481 AbstractCegarLoop]: Abstraction has 220286 states and 338608 transitions. [2020-12-22 07:40:40,539 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:40:40,539 INFO L276 IsEmpty]: Start isEmpty. Operand 220286 states and 338608 transitions. [2020-12-22 07:40:40,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 07:40:40,544 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:40:40,544 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:40:40,544 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 07:40:40,545 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:40:40,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:40:40,545 INFO L82 PathProgramCache]: Analyzing trace with hash -565045271, now seen corresponding path program 1 times [2020-12-22 07:40:40,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:40:40,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282645354] [2020-12-22 07:40:40,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:40:40,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:40:40,592 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 07:40:40,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282645354] [2020-12-22 07:40:40,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:40:40,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:40:40,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786119621] [2020-12-22 07:40:40,593 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:40:40,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:40:40,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:40:40,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:40:40,595 INFO L87 Difference]: Start difference. First operand 220286 states and 338608 transitions. Second operand 3 states. [2020-12-22 07:40:55,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:40:55,967 INFO L93 Difference]: Finished difference Result 660434 states and 1015278 transitions. [2020-12-22 07:40:55,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:40:55,967 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 82 [2020-12-22 07:40:55,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:40:57,292 INFO L225 Difference]: With dead ends: 660434 [2020-12-22 07:40:57,293 INFO L226 Difference]: Without dead ends: 440480 [2020-12-22 07:40:57,544 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 07:40:57,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440480 states. [2020-12-22 07:41:09,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440480 to 220294. [2020-12-22 07:41:09,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220294 states. [2020-12-22 07:41:10,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220294 states to 220294 states and 338616 transitions. [2020-12-22 07:41:10,197 INFO L78 Accepts]: Start accepts. Automaton has 220294 states and 338616 transitions. Word has length 82 [2020-12-22 07:41:10,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:41:10,198 INFO L481 AbstractCegarLoop]: Abstraction has 220294 states and 338616 transitions. [2020-12-22 07:41:10,198 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:41:10,198 INFO L276 IsEmpty]: Start isEmpty. Operand 220294 states and 338616 transitions. [2020-12-22 07:41:10,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 07:41:10,210 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:41:10,210 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:41:10,210 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 07:41:10,211 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:41:10,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:41:10,211 INFO L82 PathProgramCache]: Analyzing trace with hash 1283476260, now seen corresponding path program 1 times [2020-12-22 07:41:10,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:41:10,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953614198] [2020-12-22 07:41:10,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:41:10,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:41:10,331 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 07:41:10,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953614198] [2020-12-22 07:41:10,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:41:10,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:41:10,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515350136] [2020-12-22 07:41:10,332 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:41:10,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:41:10,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:41:10,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:41:10,333 INFO L87 Difference]: Start difference. First operand 220294 states and 338616 transitions. Second operand 5 states. [2020-12-22 07:41:27,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:41:27,910 INFO L93 Difference]: Finished difference Result 622528 states and 956257 transitions. [2020-12-22 07:41:27,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:41:27,910 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 83 [2020-12-22 07:41:27,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:41:28,888 INFO L225 Difference]: With dead ends: 622528 [2020-12-22 07:41:28,889 INFO L226 Difference]: Without dead ends: 402322 [2020-12-22 07:41:29,127 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:41:29,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402322 states. [2020-12-22 07:41:47,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402322 to 402320. [2020-12-22 07:41:47,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 402320 states. [2020-12-22 07:41:49,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402320 states to 402320 states and 612785 transitions. [2020-12-22 07:41:49,017 INFO L78 Accepts]: Start accepts. Automaton has 402320 states and 612785 transitions. Word has length 83 [2020-12-22 07:41:49,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:41:49,020 INFO L481 AbstractCegarLoop]: Abstraction has 402320 states and 612785 transitions. [2020-12-22 07:41:49,020 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:41:49,021 INFO L276 IsEmpty]: Start isEmpty. Operand 402320 states and 612785 transitions. [2020-12-22 07:41:49,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 07:41:49,024 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:41:49,024 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:41:49,024 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 07:41:49,025 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:41:49,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:41:49,025 INFO L82 PathProgramCache]: Analyzing trace with hash -2141300343, now seen corresponding path program 1 times [2020-12-22 07:41:49,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:41:49,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201172402] [2020-12-22 07:41:49,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:41:49,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:41:49,770 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 07:41:49,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201172402] [2020-12-22 07:41:49,770 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:41:49,770 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:41:49,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467551968] [2020-12-22 07:41:49,771 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:41:49,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:41:49,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:41:49,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:41:49,772 INFO L87 Difference]: Start difference. First operand 402320 states and 612785 transitions. Second operand 4 states. [2020-12-22 07:42:03,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:42:03,761 INFO L93 Difference]: Finished difference Result 715506 states and 1087835 transitions. [2020-12-22 07:42:03,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:42:03,761 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 83 [2020-12-22 07:42:03,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:42:04,731 INFO L225 Difference]: With dead ends: 715506 [2020-12-22 07:42:04,731 INFO L226 Difference]: Without dead ends: 313260 [2020-12-22 07:42:05,040 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 07:42:05,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313260 states. [2020-12-22 07:42:19,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313260 to 313260. [2020-12-22 07:42:19,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 313260 states. [2020-12-22 07:42:20,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313260 states to 313260 states and 475153 transitions. [2020-12-22 07:42:20,890 INFO L78 Accepts]: Start accepts. Automaton has 313260 states and 475153 transitions. Word has length 83 [2020-12-22 07:42:20,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:42:20,891 INFO L481 AbstractCegarLoop]: Abstraction has 313260 states and 475153 transitions. [2020-12-22 07:42:20,891 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:42:20,891 INFO L276 IsEmpty]: Start isEmpty. Operand 313260 states and 475153 transitions. [2020-12-22 07:42:20,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-22 07:42:20,906 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:42:20,906 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:42:20,906 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 07:42:20,908 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:42:20,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:42:20,909 INFO L82 PathProgramCache]: Analyzing trace with hash -1610663161, now seen corresponding path program 1 times [2020-12-22 07:42:20,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:42:20,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529158379] [2020-12-22 07:42:20,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:42:20,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:42:21,025 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 07:42:21,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529158379] [2020-12-22 07:42:21,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:42:21,026 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:42:21,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455011737] [2020-12-22 07:42:21,027 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:42:21,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:42:21,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:42:21,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:42:21,031 INFO L87 Difference]: Start difference. First operand 313260 states and 475153 transitions. Second operand 4 states. [2020-12-22 07:42:45,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:42:45,270 INFO L93 Difference]: Finished difference Result 823108 states and 1247342 transitions. [2020-12-22 07:42:45,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:42:45,270 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 84 [2020-12-22 07:42:45,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:42:46,723 INFO L225 Difference]: With dead ends: 823108 [2020-12-22 07:42:46,723 INFO L226 Difference]: Without dead ends: 509980 [2020-12-22 07:42:47,033 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 07:42:47,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509980 states.