/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/systemc/token_ring.11.cil-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 07:10:42,777 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 07:10:42,780 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 07:10:42,818 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 07:10:42,818 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 07:10:42,820 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 07:10:42,822 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 07:10:42,824 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 07:10:42,827 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 07:10:42,828 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 07:10:42,830 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 07:10:42,832 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 07:10:42,832 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 07:10:42,834 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 07:10:42,836 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 07:10:42,837 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 07:10:42,839 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 07:10:42,840 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 07:10:42,842 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 07:10:42,845 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 07:10:42,847 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 07:10:42,849 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 07:10:42,851 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 07:10:42,852 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 07:10:42,855 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 07:10:42,860 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 07:10:42,861 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 07:10:42,862 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 07:10:42,863 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 07:10:42,864 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 07:10:42,865 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 07:10:42,866 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 07:10:42,866 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 07:10:42,867 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 07:10:42,868 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 07:10:42,869 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 07:10:42,871 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 07:10:42,920 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 07:10:42,921 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 07:10:42,922 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 07:10:42,923 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 07:10:42,923 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 07:10:42,923 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 07:10:42,923 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 07:10:42,923 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 07:10:42,924 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 07:10:42,924 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 07:10:42,924 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 07:10:42,924 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 07:10:42,924 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 07:10:42,925 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 07:10:42,925 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 07:10:42,925 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 07:10:42,925 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 07:10:42,925 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 07:10:42,926 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 07:10:42,926 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 07:10:42,926 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 07:10:42,926 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 07:10:42,927 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 07:10:42,927 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 07:10:42,927 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 07:10:42,927 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 07:10:43,373 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 07:10:43,400 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 07:10:43,403 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 07:10:43,405 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 07:10:43,406 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 07:10:43,407 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/systemc/token_ring.11.cil-1.c [2020-12-22 07:10:43,509 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a8319124/d4c6eedbeed04361a270860b7bd088f5/FLAG30b64034f [2020-12-22 07:10:44,239 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 07:10:44,242 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/systemc/token_ring.11.cil-1.c [2020-12-22 07:10:44,277 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a8319124/d4c6eedbeed04361a270860b7bd088f5/FLAG30b64034f [2020-12-22 07:10:44,473 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a8319124/d4c6eedbeed04361a270860b7bd088f5 [2020-12-22 07:10:44,476 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 07:10:44,479 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 07:10:44,483 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 07:10:44,483 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 07:10:44,488 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 07:10:44,490 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:10:44" (1/1) ... [2020-12-22 07:10:44,494 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54f040f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:10:44, skipping insertion in model container [2020-12-22 07:10:44,494 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:10:44" (1/1) ... [2020-12-22 07:10:44,506 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 07:10:44,593 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 07:10:44,816 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/systemc/token_ring.11.cil-1.c[366,379] [2020-12-22 07:10:45,066 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:10:45,084 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 07:10:45,099 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/systemc/token_ring.11.cil-1.c[366,379] [2020-12-22 07:10:45,203 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:10:45,259 INFO L208 MainTranslator]: Completed translation [2020-12-22 07:10:45,259 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:10:45 WrapperNode [2020-12-22 07:10:45,260 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 07:10:45,262 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 07:10:45,262 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 07:10:45,262 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 07:10:45,272 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:10:45" (1/1) ... [2020-12-22 07:10:45,310 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:10:45" (1/1) ... [2020-12-22 07:10:45,525 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 07:10:45,528 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 07:10:45,532 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 07:10:45,532 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 07:10:45,543 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:10:45" (1/1) ... [2020-12-22 07:10:45,544 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:10:45" (1/1) ... [2020-12-22 07:10:45,557 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:10:45" (1/1) ... [2020-12-22 07:10:45,557 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:10:45" (1/1) ... [2020-12-22 07:10:45,606 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:10:45" (1/1) ... [2020-12-22 07:10:45,657 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:10:45" (1/1) ... [2020-12-22 07:10:45,670 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:10:45" (1/1) ... [2020-12-22 07:10:45,690 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 07:10:45,691 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 07:10:45,691 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 07:10:45,691 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 07:10:45,692 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:10:45" (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 07:10:45,824 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 07:10:45,824 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 07:10:45,825 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 07:10:45,825 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 07:10:48,848 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 07:10:48,848 INFO L299 CfgBuilder]: Removed 492 assume(true) statements. [2020-12-22 07:10:48,854 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:10:48 BoogieIcfgContainer [2020-12-22 07:10:48,854 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 07:10:48,858 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 07:10:48,859 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 07:10:48,864 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 07:10:48,865 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 07:10:44" (1/3) ... [2020-12-22 07:10:48,867 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@200d8fe3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:10:48, skipping insertion in model container [2020-12-22 07:10:48,867 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:10:45" (2/3) ... [2020-12-22 07:10:48,868 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@200d8fe3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:10:48, skipping insertion in model container [2020-12-22 07:10:48,868 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:10:48" (3/3) ... [2020-12-22 07:10:48,871 INFO L111 eAbstractionObserver]: Analyzing ICFG token_ring.11.cil-1.c [2020-12-22 07:10:48,879 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 07:10:48,886 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 07:10:48,909 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 07:10:48,960 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 07:10:48,960 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 07:10:48,960 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 07:10:48,961 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 07:10:48,961 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 07:10:48,961 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 07:10:48,961 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 07:10:48,961 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 07:10:49,011 INFO L276 IsEmpty]: Start isEmpty. Operand 1548 states. [2020-12-22 07:10:49,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-12-22 07:10:49,032 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:49,033 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:10:49,033 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:49,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:49,042 INFO L82 PathProgramCache]: Analyzing trace with hash 1376939346, now seen corresponding path program 1 times [2020-12-22 07:10:49,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:49,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922508048] [2020-12-22 07:10:49,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:49,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:49,365 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 07:10:49,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922508048] [2020-12-22 07:10:49,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:49,367 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:10:49,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52287195] [2020-12-22 07:10:49,374 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:10:49,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:49,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:10:49,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:10:49,394 INFO L87 Difference]: Start difference. First operand 1548 states. Second operand 3 states. [2020-12-22 07:10:49,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:49,593 INFO L93 Difference]: Finished difference Result 3091 states and 4675 transitions. [2020-12-22 07:10:49,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:10:49,596 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 149 [2020-12-22 07:10:49,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:49,633 INFO L225 Difference]: With dead ends: 3091 [2020-12-22 07:10:49,633 INFO L226 Difference]: Without dead ends: 1544 [2020-12-22 07:10:49,646 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 07:10:49,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1544 states. [2020-12-22 07:10:49,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1544 to 1544. [2020-12-22 07:10:49,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1544 states. [2020-12-22 07:10:49,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1544 states to 1544 states and 2306 transitions. [2020-12-22 07:10:49,816 INFO L78 Accepts]: Start accepts. Automaton has 1544 states and 2306 transitions. Word has length 149 [2020-12-22 07:10:49,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:49,817 INFO L481 AbstractCegarLoop]: Abstraction has 1544 states and 2306 transitions. [2020-12-22 07:10:49,817 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:10:49,817 INFO L276 IsEmpty]: Start isEmpty. Operand 1544 states and 2306 transitions. [2020-12-22 07:10:49,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-12-22 07:10:49,832 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:49,833 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:10:49,836 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 07:10:49,836 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:49,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:49,838 INFO L82 PathProgramCache]: Analyzing trace with hash -520040112, now seen corresponding path program 1 times [2020-12-22 07:10:49,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:49,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263412562] [2020-12-22 07:10:49,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:49,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:50,044 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 07:10:50,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263412562] [2020-12-22 07:10:50,045 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:50,045 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:10:50,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633854326] [2020-12-22 07:10:50,047 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:10:50,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:50,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:10:50,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:10:50,049 INFO L87 Difference]: Start difference. First operand 1544 states and 2306 transitions. Second operand 3 states. [2020-12-22 07:10:50,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:50,135 INFO L93 Difference]: Finished difference Result 3075 states and 4590 transitions. [2020-12-22 07:10:50,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:10:50,136 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 149 [2020-12-22 07:10:50,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:50,147 INFO L225 Difference]: With dead ends: 3075 [2020-12-22 07:10:50,147 INFO L226 Difference]: Without dead ends: 1544 [2020-12-22 07:10:50,151 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 07:10:50,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1544 states. [2020-12-22 07:10:50,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1544 to 1544. [2020-12-22 07:10:50,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1544 states. [2020-12-22 07:10:50,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1544 states to 1544 states and 2305 transitions. [2020-12-22 07:10:50,216 INFO L78 Accepts]: Start accepts. Automaton has 1544 states and 2305 transitions. Word has length 149 [2020-12-22 07:10:50,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:50,217 INFO L481 AbstractCegarLoop]: Abstraction has 1544 states and 2305 transitions. [2020-12-22 07:10:50,217 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:10:50,218 INFO L276 IsEmpty]: Start isEmpty. Operand 1544 states and 2305 transitions. [2020-12-22 07:10:50,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-12-22 07:10:50,220 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:50,220 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:10:50,221 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 07:10:50,221 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:50,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:50,222 INFO L82 PathProgramCache]: Analyzing trace with hash -589687986, now seen corresponding path program 1 times [2020-12-22 07:10:50,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:50,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412394439] [2020-12-22 07:10:50,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:50,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:50,394 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 07:10:50,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412394439] [2020-12-22 07:10:50,395 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:50,396 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:10:50,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735621044] [2020-12-22 07:10:50,397 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:10:50,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:50,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:10:50,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:10:50,402 INFO L87 Difference]: Start difference. First operand 1544 states and 2305 transitions. Second operand 3 states. [2020-12-22 07:10:50,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:50,558 INFO L93 Difference]: Finished difference Result 4384 states and 6525 transitions. [2020-12-22 07:10:50,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:10:50,559 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 149 [2020-12-22 07:10:50,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:50,576 INFO L225 Difference]: With dead ends: 4384 [2020-12-22 07:10:50,576 INFO L226 Difference]: Without dead ends: 2856 [2020-12-22 07:10:50,580 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:10:50,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2856 states. [2020-12-22 07:10:50,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2856 to 2852. [2020-12-22 07:10:50,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2852 states. [2020-12-22 07:10:50,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2852 states to 2852 states and 4241 transitions. [2020-12-22 07:10:50,697 INFO L78 Accepts]: Start accepts. Automaton has 2852 states and 4241 transitions. Word has length 149 [2020-12-22 07:10:50,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:50,704 INFO L481 AbstractCegarLoop]: Abstraction has 2852 states and 4241 transitions. [2020-12-22 07:10:50,704 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:10:50,704 INFO L276 IsEmpty]: Start isEmpty. Operand 2852 states and 4241 transitions. [2020-12-22 07:10:50,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-12-22 07:10:50,706 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:50,706 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:10:50,707 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 07:10:50,707 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:50,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:50,708 INFO L82 PathProgramCache]: Analyzing trace with hash 1058479562, now seen corresponding path program 1 times [2020-12-22 07:10:50,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:50,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810424906] [2020-12-22 07:10:50,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:50,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:50,864 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 07:10:50,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810424906] [2020-12-22 07:10:50,865 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:50,865 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:10:50,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299020188] [2020-12-22 07:10:50,866 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:10:50,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:50,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:10:50,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:10:50,870 INFO L87 Difference]: Start difference. First operand 2852 states and 4241 transitions. Second operand 4 states. [2020-12-22 07:10:51,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:51,250 INFO L93 Difference]: Finished difference Result 6998 states and 10392 transitions. [2020-12-22 07:10:51,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:10:51,251 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 149 [2020-12-22 07:10:51,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:51,279 INFO L225 Difference]: With dead ends: 6998 [2020-12-22 07:10:51,279 INFO L226 Difference]: Without dead ends: 4163 [2020-12-22 07:10:51,291 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:10:51,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4163 states. [2020-12-22 07:10:51,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4163 to 2852. [2020-12-22 07:10:51,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2852 states. [2020-12-22 07:10:51,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2852 states to 2852 states and 4238 transitions. [2020-12-22 07:10:51,532 INFO L78 Accepts]: Start accepts. Automaton has 2852 states and 4238 transitions. Word has length 149 [2020-12-22 07:10:51,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:51,532 INFO L481 AbstractCegarLoop]: Abstraction has 2852 states and 4238 transitions. [2020-12-22 07:10:51,533 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:10:51,533 INFO L276 IsEmpty]: Start isEmpty. Operand 2852 states and 4238 transitions. [2020-12-22 07:10:51,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-12-22 07:10:51,535 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:51,535 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:10:51,535 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 07:10:51,536 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:51,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:51,536 INFO L82 PathProgramCache]: Analyzing trace with hash 1421946060, now seen corresponding path program 1 times [2020-12-22 07:10:51,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:51,537 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641071916] [2020-12-22 07:10:51,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:51,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:51,657 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 07:10:51,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641071916] [2020-12-22 07:10:51,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:51,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:10:51,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327798707] [2020-12-22 07:10:51,659 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:10:51,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:51,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:10:51,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:10:51,661 INFO L87 Difference]: Start difference. First operand 2852 states and 4238 transitions. Second operand 4 states. [2020-12-22 07:10:51,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:51,965 INFO L93 Difference]: Finished difference Result 6996 states and 10382 transitions. [2020-12-22 07:10:51,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:10:51,966 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 149 [2020-12-22 07:10:51,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:51,987 INFO L225 Difference]: With dead ends: 6996 [2020-12-22 07:10:51,987 INFO L226 Difference]: Without dead ends: 4162 [2020-12-22 07:10:51,994 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:10:52,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4162 states. [2020-12-22 07:10:52,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4162 to 2852. [2020-12-22 07:10:52,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2852 states. [2020-12-22 07:10:52,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2852 states to 2852 states and 4235 transitions. [2020-12-22 07:10:52,215 INFO L78 Accepts]: Start accepts. Automaton has 2852 states and 4235 transitions. Word has length 149 [2020-12-22 07:10:52,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:52,215 INFO L481 AbstractCegarLoop]: Abstraction has 2852 states and 4235 transitions. [2020-12-22 07:10:52,216 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:10:52,216 INFO L276 IsEmpty]: Start isEmpty. Operand 2852 states and 4235 transitions. [2020-12-22 07:10:52,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-12-22 07:10:52,218 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:52,218 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:10:52,219 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 07:10:52,219 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:52,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:52,219 INFO L82 PathProgramCache]: Analyzing trace with hash 1710765450, now seen corresponding path program 1 times [2020-12-22 07:10:52,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:52,220 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985476834] [2020-12-22 07:10:52,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:52,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:52,316 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 07:10:52,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985476834] [2020-12-22 07:10:52,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:52,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:10:52,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933084740] [2020-12-22 07:10:52,318 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:10:52,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:52,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:10:52,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:10:52,319 INFO L87 Difference]: Start difference. First operand 2852 states and 4235 transitions. Second operand 4 states. [2020-12-22 07:10:52,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:52,653 INFO L93 Difference]: Finished difference Result 6994 states and 10372 transitions. [2020-12-22 07:10:52,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:10:52,654 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 149 [2020-12-22 07:10:52,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:52,676 INFO L225 Difference]: With dead ends: 6994 [2020-12-22 07:10:52,676 INFO L226 Difference]: Without dead ends: 4161 [2020-12-22 07:10:52,682 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:10:52,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4161 states. [2020-12-22 07:10:52,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4161 to 2852. [2020-12-22 07:10:52,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2852 states. [2020-12-22 07:10:52,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2852 states to 2852 states and 4232 transitions. [2020-12-22 07:10:52,862 INFO L78 Accepts]: Start accepts. Automaton has 2852 states and 4232 transitions. Word has length 149 [2020-12-22 07:10:52,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:52,863 INFO L481 AbstractCegarLoop]: Abstraction has 2852 states and 4232 transitions. [2020-12-22 07:10:52,863 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:10:52,863 INFO L276 IsEmpty]: Start isEmpty. Operand 2852 states and 4232 transitions. [2020-12-22 07:10:52,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-12-22 07:10:52,865 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:52,865 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:10:52,865 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 07:10:52,865 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:52,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:52,871 INFO L82 PathProgramCache]: Analyzing trace with hash 1165892876, now seen corresponding path program 1 times [2020-12-22 07:10:52,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:52,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020727783] [2020-12-22 07:10:52,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:52,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:52,985 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 07:10:52,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020727783] [2020-12-22 07:10:52,985 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:52,986 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:10:52,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719255927] [2020-12-22 07:10:52,987 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:10:52,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:52,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:10:52,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:10:52,988 INFO L87 Difference]: Start difference. First operand 2852 states and 4232 transitions. Second operand 3 states. [2020-12-22 07:10:53,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:53,185 INFO L93 Difference]: Finished difference Result 5684 states and 8433 transitions. [2020-12-22 07:10:53,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:10:53,186 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 149 [2020-12-22 07:10:53,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:53,203 INFO L225 Difference]: With dead ends: 5684 [2020-12-22 07:10:53,203 INFO L226 Difference]: Without dead ends: 2852 [2020-12-22 07:10:53,210 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:10:53,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2852 states. [2020-12-22 07:10:53,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2852 to 2852. [2020-12-22 07:10:53,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2852 states. [2020-12-22 07:10:53,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2852 states to 2852 states and 4224 transitions. [2020-12-22 07:10:53,403 INFO L78 Accepts]: Start accepts. Automaton has 2852 states and 4224 transitions. Word has length 149 [2020-12-22 07:10:53,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:53,404 INFO L481 AbstractCegarLoop]: Abstraction has 2852 states and 4224 transitions. [2020-12-22 07:10:53,404 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:10:53,404 INFO L276 IsEmpty]: Start isEmpty. Operand 2852 states and 4224 transitions. [2020-12-22 07:10:53,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-12-22 07:10:53,406 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:53,406 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:10:53,407 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 07:10:53,407 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:53,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:53,409 INFO L82 PathProgramCache]: Analyzing trace with hash 1841053002, now seen corresponding path program 1 times [2020-12-22 07:10:53,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:53,409 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367465021] [2020-12-22 07:10:53,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:53,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:53,482 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 07:10:53,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367465021] [2020-12-22 07:10:53,482 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:53,483 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:10:53,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967834061] [2020-12-22 07:10:53,483 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:10:53,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:53,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:10:53,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:10:53,484 INFO L87 Difference]: Start difference. First operand 2852 states and 4224 transitions. Second operand 4 states. [2020-12-22 07:10:53,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:53,788 INFO L93 Difference]: Finished difference Result 6988 states and 10337 transitions. [2020-12-22 07:10:53,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:10:53,789 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 149 [2020-12-22 07:10:53,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:53,832 INFO L225 Difference]: With dead ends: 6988 [2020-12-22 07:10:53,832 INFO L226 Difference]: Without dead ends: 4158 [2020-12-22 07:10:53,841 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:10:53,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4158 states. [2020-12-22 07:10:54,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4158 to 2852. [2020-12-22 07:10:54,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2852 states. [2020-12-22 07:10:54,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2852 states to 2852 states and 4221 transitions. [2020-12-22 07:10:54,036 INFO L78 Accepts]: Start accepts. Automaton has 2852 states and 4221 transitions. Word has length 149 [2020-12-22 07:10:54,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:54,037 INFO L481 AbstractCegarLoop]: Abstraction has 2852 states and 4221 transitions. [2020-12-22 07:10:54,037 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:10:54,038 INFO L276 IsEmpty]: Start isEmpty. Operand 2852 states and 4221 transitions. [2020-12-22 07:10:54,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-12-22 07:10:54,039 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:54,039 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:10:54,042 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 07:10:54,042 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:54,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:54,043 INFO L82 PathProgramCache]: Analyzing trace with hash 1256281352, now seen corresponding path program 1 times [2020-12-22 07:10:54,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:54,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121891011] [2020-12-22 07:10:54,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:54,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:54,118 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 07:10:54,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121891011] [2020-12-22 07:10:54,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:54,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:10:54,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609242361] [2020-12-22 07:10:54,126 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:10:54,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:54,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:10:54,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:10:54,128 INFO L87 Difference]: Start difference. First operand 2852 states and 4221 transitions. Second operand 4 states. [2020-12-22 07:10:54,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:54,424 INFO L93 Difference]: Finished difference Result 6986 states and 10327 transitions. [2020-12-22 07:10:54,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:10:54,424 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 149 [2020-12-22 07:10:54,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:54,436 INFO L225 Difference]: With dead ends: 6986 [2020-12-22 07:10:54,436 INFO L226 Difference]: Without dead ends: 4157 [2020-12-22 07:10:54,442 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:10:54,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4157 states. [2020-12-22 07:10:54,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4157 to 2852. [2020-12-22 07:10:54,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2852 states. [2020-12-22 07:10:54,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2852 states to 2852 states and 4218 transitions. [2020-12-22 07:10:54,603 INFO L78 Accepts]: Start accepts. Automaton has 2852 states and 4218 transitions. Word has length 149 [2020-12-22 07:10:54,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:54,605 INFO L481 AbstractCegarLoop]: Abstraction has 2852 states and 4218 transitions. [2020-12-22 07:10:54,605 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:10:54,606 INFO L276 IsEmpty]: Start isEmpty. Operand 2852 states and 4218 transitions. [2020-12-22 07:10:54,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-12-22 07:10:54,607 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:54,608 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:10:54,608 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 07:10:54,608 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:54,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:54,608 INFO L82 PathProgramCache]: Analyzing trace with hash 821775754, now seen corresponding path program 1 times [2020-12-22 07:10:54,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:54,609 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000171489] [2020-12-22 07:10:54,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:54,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:54,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:10:54,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000171489] [2020-12-22 07:10:54,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:54,678 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:10:54,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787071682] [2020-12-22 07:10:54,679 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:10:54,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:54,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:10:54,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:10:54,680 INFO L87 Difference]: Start difference. First operand 2852 states and 4218 transitions. Second operand 4 states. [2020-12-22 07:10:54,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:54,981 INFO L93 Difference]: Finished difference Result 6984 states and 10317 transitions. [2020-12-22 07:10:54,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:10:54,982 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 149 [2020-12-22 07:10:54,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:54,991 INFO L225 Difference]: With dead ends: 6984 [2020-12-22 07:10:54,992 INFO L226 Difference]: Without dead ends: 4156 [2020-12-22 07:10:54,998 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:10:55,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4156 states. [2020-12-22 07:10:55,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4156 to 2852. [2020-12-22 07:10:55,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2852 states. [2020-12-22 07:10:55,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2852 states to 2852 states and 4215 transitions. [2020-12-22 07:10:55,170 INFO L78 Accepts]: Start accepts. Automaton has 2852 states and 4215 transitions. Word has length 149 [2020-12-22 07:10:55,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:55,171 INFO L481 AbstractCegarLoop]: Abstraction has 2852 states and 4215 transitions. [2020-12-22 07:10:55,171 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:10:55,171 INFO L276 IsEmpty]: Start isEmpty. Operand 2852 states and 4215 transitions. [2020-12-22 07:10:55,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-12-22 07:10:55,173 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:55,173 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:10:55,173 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 07:10:55,173 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:55,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:55,174 INFO L82 PathProgramCache]: Analyzing trace with hash 392117448, now seen corresponding path program 1 times [2020-12-22 07:10:55,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:55,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561476373] [2020-12-22 07:10:55,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:55,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:55,244 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 07:10:55,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561476373] [2020-12-22 07:10:55,245 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:55,245 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:10:55,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783208634] [2020-12-22 07:10:55,246 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:10:55,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:55,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:10:55,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:10:55,248 INFO L87 Difference]: Start difference. First operand 2852 states and 4215 transitions. Second operand 4 states. [2020-12-22 07:10:55,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:55,570 INFO L93 Difference]: Finished difference Result 6982 states and 10307 transitions. [2020-12-22 07:10:55,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:10:55,570 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 149 [2020-12-22 07:10:55,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:55,580 INFO L225 Difference]: With dead ends: 6982 [2020-12-22 07:10:55,580 INFO L226 Difference]: Without dead ends: 4155 [2020-12-22 07:10:55,585 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:10:55,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4155 states. [2020-12-22 07:10:55,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4155 to 2852. [2020-12-22 07:10:55,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2852 states. [2020-12-22 07:10:55,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2852 states to 2852 states and 4212 transitions. [2020-12-22 07:10:55,794 INFO L78 Accepts]: Start accepts. Automaton has 2852 states and 4212 transitions. Word has length 149 [2020-12-22 07:10:55,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:55,795 INFO L481 AbstractCegarLoop]: Abstraction has 2852 states and 4212 transitions. [2020-12-22 07:10:55,795 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:10:55,795 INFO L276 IsEmpty]: Start isEmpty. Operand 2852 states and 4212 transitions. [2020-12-22 07:10:55,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-12-22 07:10:55,798 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:55,799 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:10:55,799 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 07:10:55,799 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:55,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:55,800 INFO L82 PathProgramCache]: Analyzing trace with hash -314479158, now seen corresponding path program 1 times [2020-12-22 07:10:55,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:55,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199791179] [2020-12-22 07:10:55,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:55,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:55,871 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 07:10:55,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199791179] [2020-12-22 07:10:55,872 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:55,873 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:10:55,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913109202] [2020-12-22 07:10:55,874 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:10:55,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:55,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:10:55,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:10:55,875 INFO L87 Difference]: Start difference. First operand 2852 states and 4212 transitions. Second operand 3 states. [2020-12-22 07:10:56,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:56,083 INFO L93 Difference]: Finished difference Result 5678 states and 8386 transitions. [2020-12-22 07:10:56,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:10:56,083 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 149 [2020-12-22 07:10:56,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:56,092 INFO L225 Difference]: With dead ends: 5678 [2020-12-22 07:10:56,092 INFO L226 Difference]: Without dead ends: 2852 [2020-12-22 07:10:56,098 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:10:56,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2852 states. [2020-12-22 07:10:56,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2852 to 2852. [2020-12-22 07:10:56,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2852 states. [2020-12-22 07:10:56,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2852 states to 2852 states and 4204 transitions. [2020-12-22 07:10:56,325 INFO L78 Accepts]: Start accepts. Automaton has 2852 states and 4204 transitions. Word has length 149 [2020-12-22 07:10:56,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:56,325 INFO L481 AbstractCegarLoop]: Abstraction has 2852 states and 4204 transitions. [2020-12-22 07:10:56,325 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:10:56,325 INFO L276 IsEmpty]: Start isEmpty. Operand 2852 states and 4204 transitions. [2020-12-22 07:10:56,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-12-22 07:10:56,327 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:56,327 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:10:56,328 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 07:10:56,328 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:56,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:56,329 INFO L82 PathProgramCache]: Analyzing trace with hash 123085638, now seen corresponding path program 1 times [2020-12-22 07:10:56,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:56,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768573542] [2020-12-22 07:10:56,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:56,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:56,408 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 07:10:56,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768573542] [2020-12-22 07:10:56,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:56,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:10:56,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605641736] [2020-12-22 07:10:56,410 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:10:56,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:56,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:10:56,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:10:56,411 INFO L87 Difference]: Start difference. First operand 2852 states and 4204 transitions. Second operand 4 states. [2020-12-22 07:10:56,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:56,786 INFO L93 Difference]: Finished difference Result 6978 states and 10276 transitions. [2020-12-22 07:10:56,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:10:56,787 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 149 [2020-12-22 07:10:56,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:56,799 INFO L225 Difference]: With dead ends: 6978 [2020-12-22 07:10:56,799 INFO L226 Difference]: Without dead ends: 4153 [2020-12-22 07:10:56,806 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:10:56,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4153 states. [2020-12-22 07:10:56,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4153 to 2852. [2020-12-22 07:10:56,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2852 states. [2020-12-22 07:10:56,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2852 states to 2852 states and 4201 transitions. [2020-12-22 07:10:56,999 INFO L78 Accepts]: Start accepts. Automaton has 2852 states and 4201 transitions. Word has length 149 [2020-12-22 07:10:56,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:56,999 INFO L481 AbstractCegarLoop]: Abstraction has 2852 states and 4201 transitions. [2020-12-22 07:10:56,999 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:10:56,999 INFO L276 IsEmpty]: Start isEmpty. Operand 2852 states and 4201 transitions. [2020-12-22 07:10:57,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-12-22 07:10:57,001 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:57,001 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:10:57,002 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 07:10:57,002 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:57,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:57,002 INFO L82 PathProgramCache]: Analyzing trace with hash 984919240, now seen corresponding path program 1 times [2020-12-22 07:10:57,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:57,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144201694] [2020-12-22 07:10:57,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:57,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:57,061 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 07:10:57,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144201694] [2020-12-22 07:10:57,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:57,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:10:57,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173118242] [2020-12-22 07:10:57,062 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:10:57,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:57,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:10:57,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:10:57,063 INFO L87 Difference]: Start difference. First operand 2852 states and 4201 transitions. Second operand 4 states. [2020-12-22 07:10:57,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:57,501 INFO L93 Difference]: Finished difference Result 6892 states and 10146 transitions. [2020-12-22 07:10:57,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:10:57,501 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 149 [2020-12-22 07:10:57,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:57,512 INFO L225 Difference]: With dead ends: 6892 [2020-12-22 07:10:57,512 INFO L226 Difference]: Without dead ends: 4068 [2020-12-22 07:10:57,519 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:10:57,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4068 states. [2020-12-22 07:10:57,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4068 to 2852. [2020-12-22 07:10:57,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2852 states. [2020-12-22 07:10:57,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2852 states to 2852 states and 4198 transitions. [2020-12-22 07:10:57,730 INFO L78 Accepts]: Start accepts. Automaton has 2852 states and 4198 transitions. Word has length 149 [2020-12-22 07:10:57,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:57,731 INFO L481 AbstractCegarLoop]: Abstraction has 2852 states and 4198 transitions. [2020-12-22 07:10:57,731 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:10:57,731 INFO L276 IsEmpty]: Start isEmpty. Operand 2852 states and 4198 transitions. [2020-12-22 07:10:57,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-12-22 07:10:57,733 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:57,733 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:10:57,733 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 07:10:57,733 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:57,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:57,734 INFO L82 PathProgramCache]: Analyzing trace with hash -1065489658, now seen corresponding path program 1 times [2020-12-22 07:10:57,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:57,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164911317] [2020-12-22 07:10:57,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:57,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:57,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:10:57,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164911317] [2020-12-22 07:10:57,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:57,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:10:57,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626899086] [2020-12-22 07:10:57,794 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:10:57,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:57,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:10:57,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:10:57,795 INFO L87 Difference]: Start difference. First operand 2852 states and 4198 transitions. Second operand 3 states. [2020-12-22 07:10:58,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:58,036 INFO L93 Difference]: Finished difference Result 5674 states and 8353 transitions. [2020-12-22 07:10:58,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:10:58,036 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 149 [2020-12-22 07:10:58,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:58,044 INFO L225 Difference]: With dead ends: 5674 [2020-12-22 07:10:58,044 INFO L226 Difference]: Without dead ends: 2852 [2020-12-22 07:10:58,049 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:10:58,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2852 states. [2020-12-22 07:10:58,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2852 to 2852. [2020-12-22 07:10:58,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2852 states. [2020-12-22 07:10:58,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2852 states to 2852 states and 4164 transitions. [2020-12-22 07:10:58,261 INFO L78 Accepts]: Start accepts. Automaton has 2852 states and 4164 transitions. Word has length 149 [2020-12-22 07:10:58,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:58,261 INFO L481 AbstractCegarLoop]: Abstraction has 2852 states and 4164 transitions. [2020-12-22 07:10:58,261 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:10:58,262 INFO L276 IsEmpty]: Start isEmpty. Operand 2852 states and 4164 transitions. [2020-12-22 07:10:58,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-12-22 07:10:58,263 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:58,264 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:10:58,264 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 07:10:58,264 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:58,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:58,265 INFO L82 PathProgramCache]: Analyzing trace with hash 141416899, now seen corresponding path program 1 times [2020-12-22 07:10:58,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:58,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418244789] [2020-12-22 07:10:58,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:58,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:58,323 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 07:10:58,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418244789] [2020-12-22 07:10:58,323 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:58,323 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:10:58,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593026351] [2020-12-22 07:10:58,324 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:10:58,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:58,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:10:58,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:10:58,325 INFO L87 Difference]: Start difference. First operand 2852 states and 4164 transitions. Second operand 4 states. [2020-12-22 07:10:58,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:58,770 INFO L93 Difference]: Finished difference Result 6886 states and 10048 transitions. [2020-12-22 07:10:58,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:10:58,770 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 149 [2020-12-22 07:10:58,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:58,780 INFO L225 Difference]: With dead ends: 6886 [2020-12-22 07:10:58,781 INFO L226 Difference]: Without dead ends: 4065 [2020-12-22 07:10:58,786 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:10:58,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4065 states. [2020-12-22 07:10:59,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4065 to 2852. [2020-12-22 07:10:59,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2852 states. [2020-12-22 07:10:59,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2852 states to 2852 states and 4161 transitions. [2020-12-22 07:10:59,039 INFO L78 Accepts]: Start accepts. Automaton has 2852 states and 4161 transitions. Word has length 149 [2020-12-22 07:10:59,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:59,039 INFO L481 AbstractCegarLoop]: Abstraction has 2852 states and 4161 transitions. [2020-12-22 07:10:59,039 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:10:59,039 INFO L276 IsEmpty]: Start isEmpty. Operand 2852 states and 4161 transitions. [2020-12-22 07:10:59,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-12-22 07:10:59,041 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:59,041 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:10:59,042 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 07:10:59,042 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:59,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:59,042 INFO L82 PathProgramCache]: Analyzing trace with hash -1140755387, now seen corresponding path program 1 times [2020-12-22 07:10:59,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:59,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097978179] [2020-12-22 07:10:59,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:59,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:59,105 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 07:10:59,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097978179] [2020-12-22 07:10:59,106 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:59,106 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:10:59,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948468298] [2020-12-22 07:10:59,107 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:10:59,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:59,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:10:59,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:10:59,108 INFO L87 Difference]: Start difference. First operand 2852 states and 4161 transitions. Second operand 4 states. [2020-12-22 07:10:59,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:59,552 INFO L93 Difference]: Finished difference Result 6884 states and 10038 transitions. [2020-12-22 07:10:59,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:10:59,553 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 149 [2020-12-22 07:10:59,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:59,563 INFO L225 Difference]: With dead ends: 6884 [2020-12-22 07:10:59,563 INFO L226 Difference]: Without dead ends: 4064 [2020-12-22 07:10:59,569 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:10:59,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4064 states. [2020-12-22 07:10:59,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4064 to 2852. [2020-12-22 07:10:59,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2852 states. [2020-12-22 07:10:59,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2852 states to 2852 states and 4158 transitions. [2020-12-22 07:10:59,776 INFO L78 Accepts]: Start accepts. Automaton has 2852 states and 4158 transitions. Word has length 149 [2020-12-22 07:10:59,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:59,776 INFO L481 AbstractCegarLoop]: Abstraction has 2852 states and 4158 transitions. [2020-12-22 07:10:59,777 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:10:59,777 INFO L276 IsEmpty]: Start isEmpty. Operand 2852 states and 4158 transitions. [2020-12-22 07:10:59,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-12-22 07:10:59,778 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:59,778 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:10:59,778 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 07:10:59,779 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:59,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:59,779 INFO L82 PathProgramCache]: Analyzing trace with hash 1311736195, now seen corresponding path program 1 times [2020-12-22 07:10:59,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:59,780 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936329388] [2020-12-22 07:10:59,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:59,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:59,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:10:59,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936329388] [2020-12-22 07:10:59,873 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:59,873 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:10:59,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835060299] [2020-12-22 07:10:59,874 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:10:59,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:59,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:10:59,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:10:59,875 INFO L87 Difference]: Start difference. First operand 2852 states and 4158 transitions. Second operand 4 states. [2020-12-22 07:11:00,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:00,429 INFO L93 Difference]: Finished difference Result 6882 states and 10028 transitions. [2020-12-22 07:11:00,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:11:00,430 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 149 [2020-12-22 07:11:00,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:00,440 INFO L225 Difference]: With dead ends: 6882 [2020-12-22 07:11:00,441 INFO L226 Difference]: Without dead ends: 4063 [2020-12-22 07:11:00,447 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:11:00,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4063 states. [2020-12-22 07:11:00,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4063 to 2852. [2020-12-22 07:11:00,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2852 states. [2020-12-22 07:11:00,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2852 states to 2852 states and 4155 transitions. [2020-12-22 07:11:00,647 INFO L78 Accepts]: Start accepts. Automaton has 2852 states and 4155 transitions. Word has length 149 [2020-12-22 07:11:00,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:00,647 INFO L481 AbstractCegarLoop]: Abstraction has 2852 states and 4155 transitions. [2020-12-22 07:11:00,647 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:11:00,647 INFO L276 IsEmpty]: Start isEmpty. Operand 2852 states and 4155 transitions. [2020-12-22 07:11:00,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-12-22 07:11:00,648 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:00,648 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:11:00,649 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 07:11:00,649 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:00,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:00,649 INFO L82 PathProgramCache]: Analyzing trace with hash -410266491, now seen corresponding path program 1 times [2020-12-22 07:11:00,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:00,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297290644] [2020-12-22 07:11:00,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:00,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:00,727 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 07:11:00,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297290644] [2020-12-22 07:11:00,728 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:00,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:11:00,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582977719] [2020-12-22 07:11:00,730 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:11:00,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:00,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:11:00,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:11:00,731 INFO L87 Difference]: Start difference. First operand 2852 states and 4155 transitions. Second operand 4 states. [2020-12-22 07:11:01,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:01,212 INFO L93 Difference]: Finished difference Result 6880 states and 10018 transitions. [2020-12-22 07:11:01,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:11:01,213 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 149 [2020-12-22 07:11:01,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:01,223 INFO L225 Difference]: With dead ends: 6880 [2020-12-22 07:11:01,223 INFO L226 Difference]: Without dead ends: 4062 [2020-12-22 07:11:01,228 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:11:01,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4062 states. [2020-12-22 07:11:01,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4062 to 2852. [2020-12-22 07:11:01,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2852 states. [2020-12-22 07:11:01,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2852 states to 2852 states and 4152 transitions. [2020-12-22 07:11:01,480 INFO L78 Accepts]: Start accepts. Automaton has 2852 states and 4152 transitions. Word has length 149 [2020-12-22 07:11:01,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:01,481 INFO L481 AbstractCegarLoop]: Abstraction has 2852 states and 4152 transitions. [2020-12-22 07:11:01,481 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:11:01,481 INFO L276 IsEmpty]: Start isEmpty. Operand 2852 states and 4152 transitions. [2020-12-22 07:11:01,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-12-22 07:11:01,482 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:01,482 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:11:01,483 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 07:11:01,483 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:01,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:01,484 INFO L82 PathProgramCache]: Analyzing trace with hash -742909629, now seen corresponding path program 1 times [2020-12-22 07:11:01,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:01,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348893021] [2020-12-22 07:11:01,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:01,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:01,548 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 07:11:01,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348893021] [2020-12-22 07:11:01,548 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:01,549 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:11:01,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328103994] [2020-12-22 07:11:01,549 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:11:01,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:01,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:11:01,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:11:01,550 INFO L87 Difference]: Start difference. First operand 2852 states and 4152 transitions. Second operand 4 states. [2020-12-22 07:11:01,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:02,000 INFO L93 Difference]: Finished difference Result 6878 states and 10008 transitions. [2020-12-22 07:11:02,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:11:02,000 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 149 [2020-12-22 07:11:02,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:02,011 INFO L225 Difference]: With dead ends: 6878 [2020-12-22 07:11:02,011 INFO L226 Difference]: Without dead ends: 4061 [2020-12-22 07:11:02,017 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:11:02,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4061 states. [2020-12-22 07:11:02,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4061 to 2852. [2020-12-22 07:11:02,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2852 states. [2020-12-22 07:11:02,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2852 states to 2852 states and 4149 transitions. [2020-12-22 07:11:02,288 INFO L78 Accepts]: Start accepts. Automaton has 2852 states and 4149 transitions. Word has length 149 [2020-12-22 07:11:02,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:02,288 INFO L481 AbstractCegarLoop]: Abstraction has 2852 states and 4149 transitions. [2020-12-22 07:11:02,288 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:11:02,288 INFO L276 IsEmpty]: Start isEmpty. Operand 2852 states and 4149 transitions. [2020-12-22 07:11:02,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-12-22 07:11:02,289 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:02,290 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:11:02,290 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 07:11:02,290 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:02,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:02,291 INFO L82 PathProgramCache]: Analyzing trace with hash 1186022597, now seen corresponding path program 1 times [2020-12-22 07:11:02,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:02,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131297639] [2020-12-22 07:11:02,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:02,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:02,386 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 07:11:02,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131297639] [2020-12-22 07:11:02,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:02,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:11:02,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426984815] [2020-12-22 07:11:02,388 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:11:02,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:02,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:11:02,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:11:02,389 INFO L87 Difference]: Start difference. First operand 2852 states and 4149 transitions. Second operand 4 states. [2020-12-22 07:11:02,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:02,847 INFO L93 Difference]: Finished difference Result 6876 states and 9998 transitions. [2020-12-22 07:11:02,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:11:02,848 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 149 [2020-12-22 07:11:02,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:02,857 INFO L225 Difference]: With dead ends: 6876 [2020-12-22 07:11:02,858 INFO L226 Difference]: Without dead ends: 4060 [2020-12-22 07:11:02,863 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:11:02,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4060 states. [2020-12-22 07:11:03,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4060 to 2852. [2020-12-22 07:11:03,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2852 states. [2020-12-22 07:11:03,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2852 states to 2852 states and 4146 transitions. [2020-12-22 07:11:03,108 INFO L78 Accepts]: Start accepts. Automaton has 2852 states and 4146 transitions. Word has length 149 [2020-12-22 07:11:03,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:03,109 INFO L481 AbstractCegarLoop]: Abstraction has 2852 states and 4146 transitions. [2020-12-22 07:11:03,109 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:11:03,109 INFO L276 IsEmpty]: Start isEmpty. Operand 2852 states and 4146 transitions. [2020-12-22 07:11:03,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-12-22 07:11:03,110 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:03,110 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:11:03,110 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 07:11:03,110 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:03,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:03,111 INFO L82 PathProgramCache]: Analyzing trace with hash -1107058429, now seen corresponding path program 1 times [2020-12-22 07:11:03,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:03,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714609771] [2020-12-22 07:11:03,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:03,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:03,171 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 07:11:03,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714609771] [2020-12-22 07:11:03,172 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:03,172 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:11:03,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472216839] [2020-12-22 07:11:03,173 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:11:03,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:03,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:11:03,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:11:03,174 INFO L87 Difference]: Start difference. First operand 2852 states and 4146 transitions. Second operand 4 states. [2020-12-22 07:11:03,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:03,700 INFO L93 Difference]: Finished difference Result 6872 states and 9984 transitions. [2020-12-22 07:11:03,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:11:03,700 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 149 [2020-12-22 07:11:03,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:03,708 INFO L225 Difference]: With dead ends: 6872 [2020-12-22 07:11:03,708 INFO L226 Difference]: Without dead ends: 4058 [2020-12-22 07:11:03,714 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:11:03,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4058 states. [2020-12-22 07:11:03,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4058 to 2852. [2020-12-22 07:11:03,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2852 states. [2020-12-22 07:11:03,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2852 states to 2852 states and 4143 transitions. [2020-12-22 07:11:03,965 INFO L78 Accepts]: Start accepts. Automaton has 2852 states and 4143 transitions. Word has length 149 [2020-12-22 07:11:03,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:03,966 INFO L481 AbstractCegarLoop]: Abstraction has 2852 states and 4143 transitions. [2020-12-22 07:11:03,966 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:11:03,966 INFO L276 IsEmpty]: Start isEmpty. Operand 2852 states and 4143 transitions. [2020-12-22 07:11:03,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-12-22 07:11:03,967 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:03,967 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:11:03,967 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 07:11:03,967 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:03,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:03,968 INFO L82 PathProgramCache]: Analyzing trace with hash -635702079, now seen corresponding path program 1 times [2020-12-22 07:11:03,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:03,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997967247] [2020-12-22 07:11:03,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:03,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:04,023 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 07:11:04,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997967247] [2020-12-22 07:11:04,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:04,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:11:04,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696861737] [2020-12-22 07:11:04,024 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:11:04,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:04,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:11:04,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:11:04,025 INFO L87 Difference]: Start difference. First operand 2852 states and 4143 transitions. Second operand 4 states. [2020-12-22 07:11:04,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:04,481 INFO L93 Difference]: Finished difference Result 6870 states and 9974 transitions. [2020-12-22 07:11:04,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:11:04,482 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 149 [2020-12-22 07:11:04,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:04,490 INFO L225 Difference]: With dead ends: 6870 [2020-12-22 07:11:04,490 INFO L226 Difference]: Without dead ends: 4057 [2020-12-22 07:11:04,495 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:11:04,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4057 states. [2020-12-22 07:11:04,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4057 to 2852. [2020-12-22 07:11:04,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2852 states. [2020-12-22 07:11:04,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2852 states to 2852 states and 4140 transitions. [2020-12-22 07:11:04,852 INFO L78 Accepts]: Start accepts. Automaton has 2852 states and 4140 transitions. Word has length 149 [2020-12-22 07:11:04,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:04,852 INFO L481 AbstractCegarLoop]: Abstraction has 2852 states and 4140 transitions. [2020-12-22 07:11:04,853 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:11:04,853 INFO L276 IsEmpty]: Start isEmpty. Operand 2852 states and 4140 transitions. [2020-12-22 07:11:04,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-12-22 07:11:04,854 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:04,855 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:11:04,855 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 07:11:04,855 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:04,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:04,855 INFO L82 PathProgramCache]: Analyzing trace with hash 2011902275, now seen corresponding path program 1 times [2020-12-22 07:11:04,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:04,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895174876] [2020-12-22 07:11:04,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:04,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:04,939 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 07:11:04,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895174876] [2020-12-22 07:11:04,940 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:04,940 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:11:04,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357179719] [2020-12-22 07:11:04,941 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:11:04,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:04,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:11:04,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:11:04,945 INFO L87 Difference]: Start difference. First operand 2852 states and 4140 transitions. Second operand 3 states. [2020-12-22 07:11:05,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:05,395 INFO L93 Difference]: Finished difference Result 8322 states and 12064 transitions. [2020-12-22 07:11:05,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:11:05,399 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 149 [2020-12-22 07:11:05,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:05,408 INFO L225 Difference]: With dead ends: 8322 [2020-12-22 07:11:05,408 INFO L226 Difference]: Without dead ends: 5511 [2020-12-22 07:11:05,414 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:11:05,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5511 states. [2020-12-22 07:11:05,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5511 to 5347. [2020-12-22 07:11:05,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5347 states. [2020-12-22 07:11:05,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5347 states to 5347 states and 7719 transitions. [2020-12-22 07:11:05,927 INFO L78 Accepts]: Start accepts. Automaton has 5347 states and 7719 transitions. Word has length 149 [2020-12-22 07:11:05,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:05,928 INFO L481 AbstractCegarLoop]: Abstraction has 5347 states and 7719 transitions. [2020-12-22 07:11:05,928 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:11:05,928 INFO L276 IsEmpty]: Start isEmpty. Operand 5347 states and 7719 transitions. [2020-12-22 07:11:05,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2020-12-22 07:11:05,932 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:05,934 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:11:05,934 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-12-22 07:11:05,934 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:05,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:05,935 INFO L82 PathProgramCache]: Analyzing trace with hash 1491904716, now seen corresponding path program 1 times [2020-12-22 07:11:05,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:05,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456449217] [2020-12-22 07:11:05,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:05,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:06,058 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 07:11:06,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456449217] [2020-12-22 07:11:06,059 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:06,060 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:11:06,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526644884] [2020-12-22 07:11:06,061 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:11:06,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:06,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:11:06,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:11:06,062 INFO L87 Difference]: Start difference. First operand 5347 states and 7719 transitions. Second operand 5 states. [2020-12-22 07:11:07,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:07,372 INFO L93 Difference]: Finished difference Result 15824 states and 22859 transitions. [2020-12-22 07:11:07,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:11:07,373 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 243 [2020-12-22 07:11:07,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:07,388 INFO L225 Difference]: With dead ends: 15824 [2020-12-22 07:11:07,388 INFO L226 Difference]: Without dead ends: 10522 [2020-12-22 07:11:07,402 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 07:11:07,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10522 states. [2020-12-22 07:11:07,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10522 to 5428. [2020-12-22 07:11:07,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5428 states. [2020-12-22 07:11:07,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5428 states to 5428 states and 7774 transitions. [2020-12-22 07:11:07,849 INFO L78 Accepts]: Start accepts. Automaton has 5428 states and 7774 transitions. Word has length 243 [2020-12-22 07:11:07,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:07,849 INFO L481 AbstractCegarLoop]: Abstraction has 5428 states and 7774 transitions. [2020-12-22 07:11:07,849 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:11:07,849 INFO L276 IsEmpty]: Start isEmpty. Operand 5428 states and 7774 transitions. [2020-12-22 07:11:07,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2020-12-22 07:11:07,853 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:07,854 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:11:07,854 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-12-22 07:11:07,854 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:07,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:07,855 INFO L82 PathProgramCache]: Analyzing trace with hash 1775890254, now seen corresponding path program 1 times [2020-12-22 07:11:07,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:07,855 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592571782] [2020-12-22 07:11:07,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:07,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:07,980 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 07:11:07,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592571782] [2020-12-22 07:11:07,981 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:07,981 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:11:07,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851171005] [2020-12-22 07:11:07,982 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:11:07,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:07,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:11:07,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:11:07,983 INFO L87 Difference]: Start difference. First operand 5428 states and 7774 transitions. Second operand 5 states. [2020-12-22 07:11:09,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:09,422 INFO L93 Difference]: Finished difference Result 20669 states and 29665 transitions. [2020-12-22 07:11:09,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:11:09,422 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 243 [2020-12-22 07:11:09,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:09,438 INFO L225 Difference]: With dead ends: 20669 [2020-12-22 07:11:09,438 INFO L226 Difference]: Without dead ends: 15293 [2020-12-22 07:11:09,447 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 07:11:09,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15293 states. [2020-12-22 07:11:09,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15293 to 5587. [2020-12-22 07:11:09,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5587 states. [2020-12-22 07:11:09,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5587 states to 5587 states and 7933 transitions. [2020-12-22 07:11:09,960 INFO L78 Accepts]: Start accepts. Automaton has 5587 states and 7933 transitions. Word has length 243 [2020-12-22 07:11:09,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:09,961 INFO L481 AbstractCegarLoop]: Abstraction has 5587 states and 7933 transitions. [2020-12-22 07:11:09,961 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:11:09,961 INFO L276 IsEmpty]: Start isEmpty. Operand 5587 states and 7933 transitions. [2020-12-22 07:11:09,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2020-12-22 07:11:09,966 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:09,966 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:11:09,966 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-12-22 07:11:09,967 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:09,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:09,967 INFO L82 PathProgramCache]: Analyzing trace with hash -304693424, now seen corresponding path program 1 times [2020-12-22 07:11:09,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:09,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424974127] [2020-12-22 07:11:09,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:10,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:10,088 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 07:11:10,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424974127] [2020-12-22 07:11:10,088 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:10,089 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:11:10,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658963486] [2020-12-22 07:11:10,089 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:11:10,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:10,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:11:10,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:11:10,090 INFO L87 Difference]: Start difference. First operand 5587 states and 7933 transitions. Second operand 5 states. [2020-12-22 07:11:10,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:10,982 INFO L93 Difference]: Finished difference Result 13586 states and 19236 transitions. [2020-12-22 07:11:10,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:11:10,983 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 243 [2020-12-22 07:11:10,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:10,990 INFO L225 Difference]: With dead ends: 13586 [2020-12-22 07:11:10,991 INFO L226 Difference]: Without dead ends: 8061 [2020-12-22 07:11:10,997 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 07:11:11,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8061 states. [2020-12-22 07:11:11,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8061 to 5599. [2020-12-22 07:11:11,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5599 states. [2020-12-22 07:11:11,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5599 states to 5599 states and 7896 transitions. [2020-12-22 07:11:11,628 INFO L78 Accepts]: Start accepts. Automaton has 5599 states and 7896 transitions. Word has length 243 [2020-12-22 07:11:11,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:11,628 INFO L481 AbstractCegarLoop]: Abstraction has 5599 states and 7896 transitions. [2020-12-22 07:11:11,628 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:11:11,628 INFO L276 IsEmpty]: Start isEmpty. Operand 5599 states and 7896 transitions. [2020-12-22 07:11:11,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2020-12-22 07:11:11,633 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:11,633 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:11:11,633 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-12-22 07:11:11,633 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:11,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:11,634 INFO L82 PathProgramCache]: Analyzing trace with hash 838466900, now seen corresponding path program 1 times [2020-12-22 07:11:11,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:11,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653248197] [2020-12-22 07:11:11,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:11,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:11,740 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 07:11:11,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653248197] [2020-12-22 07:11:11,740 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:11,741 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:11:11,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449857142] [2020-12-22 07:11:11,741 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:11:11,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:11,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:11:11,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:11:11,742 INFO L87 Difference]: Start difference. First operand 5599 states and 7896 transitions. Second operand 4 states. [2020-12-22 07:11:12,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:12,998 INFO L93 Difference]: Finished difference Result 18971 states and 26714 transitions. [2020-12-22 07:11:12,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:11:12,998 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 243 [2020-12-22 07:11:12,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:13,011 INFO L225 Difference]: With dead ends: 18971 [2020-12-22 07:11:13,011 INFO L226 Difference]: Without dead ends: 13436 [2020-12-22 07:11:13,016 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:11:13,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13436 states. [2020-12-22 07:11:13,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13436 to 10632. [2020-12-22 07:11:13,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10632 states. [2020-12-22 07:11:13,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10632 states to 10632 states and 14932 transitions. [2020-12-22 07:11:13,986 INFO L78 Accepts]: Start accepts. Automaton has 10632 states and 14932 transitions. Word has length 243 [2020-12-22 07:11:13,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:13,986 INFO L481 AbstractCegarLoop]: Abstraction has 10632 states and 14932 transitions. [2020-12-22 07:11:13,986 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:11:13,987 INFO L276 IsEmpty]: Start isEmpty. Operand 10632 states and 14932 transitions. [2020-12-22 07:11:13,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2020-12-22 07:11:13,995 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:13,995 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:11:13,995 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-12-22 07:11:13,996 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:13,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:13,996 INFO L82 PathProgramCache]: Analyzing trace with hash 1391960918, now seen corresponding path program 1 times [2020-12-22 07:11:13,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:13,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118029732] [2020-12-22 07:11:13,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:14,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:14,127 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 07:11:14,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118029732] [2020-12-22 07:11:14,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:14,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:11:14,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381364746] [2020-12-22 07:11:14,129 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:11:14,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:14,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:11:14,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:11:14,130 INFO L87 Difference]: Start difference. First operand 10632 states and 14932 transitions. Second operand 5 states. [2020-12-22 07:11:15,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:15,909 INFO L93 Difference]: Finished difference Result 30310 states and 42801 transitions. [2020-12-22 07:11:15,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:11:15,910 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 243 [2020-12-22 07:11:15,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:15,928 INFO L225 Difference]: With dead ends: 30310 [2020-12-22 07:11:15,929 INFO L226 Difference]: Without dead ends: 19746 [2020-12-22 07:11:15,941 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 07:11:15,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19746 states. [2020-12-22 07:11:16,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19746 to 10788. [2020-12-22 07:11:16,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10788 states. [2020-12-22 07:11:16,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10788 states to 10788 states and 15039 transitions. [2020-12-22 07:11:16,937 INFO L78 Accepts]: Start accepts. Automaton has 10788 states and 15039 transitions. Word has length 243 [2020-12-22 07:11:16,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:16,937 INFO L481 AbstractCegarLoop]: Abstraction has 10788 states and 15039 transitions. [2020-12-22 07:11:16,937 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:11:16,937 INFO L276 IsEmpty]: Start isEmpty. Operand 10788 states and 15039 transitions. [2020-12-22 07:11:16,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2020-12-22 07:11:16,945 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:16,945 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:11:16,945 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-12-22 07:11:16,945 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:16,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:16,946 INFO L82 PathProgramCache]: Analyzing trace with hash 1238545498, now seen corresponding path program 1 times [2020-12-22 07:11:16,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:16,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675649688] [2020-12-22 07:11:16,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:16,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:17,042 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 07:11:17,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675649688] [2020-12-22 07:11:17,042 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:17,043 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:11:17,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675915270] [2020-12-22 07:11:17,043 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:11:17,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:17,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:11:17,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:11:17,044 INFO L87 Difference]: Start difference. First operand 10788 states and 15039 transitions. Second operand 4 states. [2020-12-22 07:11:19,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:19,539 INFO L93 Difference]: Finished difference Result 36674 states and 51051 transitions. [2020-12-22 07:11:19,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:11:19,539 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 243 [2020-12-22 07:11:19,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:19,575 INFO L225 Difference]: With dead ends: 36674 [2020-12-22 07:11:19,575 INFO L226 Difference]: Without dead ends: 25963 [2020-12-22 07:11:19,591 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:11:19,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25963 states. [2020-12-22 07:11:21,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25963 to 20595. [2020-12-22 07:11:21,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20595 states. [2020-12-22 07:11:21,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20595 states to 20595 states and 28596 transitions. [2020-12-22 07:11:21,444 INFO L78 Accepts]: Start accepts. Automaton has 20595 states and 28596 transitions. Word has length 243 [2020-12-22 07:11:21,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:21,444 INFO L481 AbstractCegarLoop]: Abstraction has 20595 states and 28596 transitions. [2020-12-22 07:11:21,444 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:11:21,444 INFO L276 IsEmpty]: Start isEmpty. Operand 20595 states and 28596 transitions. [2020-12-22 07:11:21,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2020-12-22 07:11:21,455 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:21,455 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:11:21,455 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-12-22 07:11:21,455 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:21,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:21,456 INFO L82 PathProgramCache]: Analyzing trace with hash -643314340, now seen corresponding path program 1 times [2020-12-22 07:11:21,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:21,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69136504] [2020-12-22 07:11:21,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:21,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:21,538 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 07:11:21,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69136504] [2020-12-22 07:11:21,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:21,539 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:11:21,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051409288] [2020-12-22 07:11:21,540 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:11:21,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:21,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:11:21,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:11:21,541 INFO L87 Difference]: Start difference. First operand 20595 states and 28596 transitions. Second operand 5 states. [2020-12-22 07:11:24,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:24,916 INFO L93 Difference]: Finished difference Result 57445 states and 80278 transitions. [2020-12-22 07:11:24,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:11:24,916 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 243 [2020-12-22 07:11:24,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:24,955 INFO L225 Difference]: With dead ends: 57445 [2020-12-22 07:11:24,956 INFO L226 Difference]: Without dead ends: 36931 [2020-12-22 07:11:24,984 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 07:11:25,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36931 states. [2020-12-22 07:11:27,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36931 to 20895. [2020-12-22 07:11:27,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20895 states. [2020-12-22 07:11:27,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20895 states to 20895 states and 28803 transitions. [2020-12-22 07:11:27,455 INFO L78 Accepts]: Start accepts. Automaton has 20895 states and 28803 transitions. Word has length 243 [2020-12-22 07:11:27,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:27,455 INFO L481 AbstractCegarLoop]: Abstraction has 20895 states and 28803 transitions. [2020-12-22 07:11:27,455 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:11:27,455 INFO L276 IsEmpty]: Start isEmpty. Operand 20895 states and 28803 transitions. [2020-12-22 07:11:27,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2020-12-22 07:11:27,470 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:27,470 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:11:27,471 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-12-22 07:11:27,471 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:27,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:27,472 INFO L82 PathProgramCache]: Analyzing trace with hash 1408320608, now seen corresponding path program 1 times [2020-12-22 07:11:27,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:27,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796074554] [2020-12-22 07:11:27,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:27,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:27,571 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 07:11:27,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796074554] [2020-12-22 07:11:27,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:27,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:11:27,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606167964] [2020-12-22 07:11:27,573 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:11:27,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:27,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:11:27,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:11:27,575 INFO L87 Difference]: Start difference. First operand 20895 states and 28803 transitions. Second operand 5 states. [2020-12-22 07:11:32,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:32,730 INFO L93 Difference]: Finished difference Result 72271 states and 100599 transitions. [2020-12-22 07:11:32,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:11:32,730 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 243 [2020-12-22 07:11:32,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:32,784 INFO L225 Difference]: With dead ends: 72271 [2020-12-22 07:11:32,785 INFO L226 Difference]: Without dead ends: 51464 [2020-12-22 07:11:32,806 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 07:11:32,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51464 states. [2020-12-22 07:11:35,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51464 to 21474. [2020-12-22 07:11:35,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21474 states. [2020-12-22 07:11:35,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21474 states to 21474 states and 29382 transitions. [2020-12-22 07:11:35,229 INFO L78 Accepts]: Start accepts. Automaton has 21474 states and 29382 transitions. Word has length 243 [2020-12-22 07:11:35,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:35,229 INFO L481 AbstractCegarLoop]: Abstraction has 21474 states and 29382 transitions. [2020-12-22 07:11:35,229 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:11:35,229 INFO L276 IsEmpty]: Start isEmpty. Operand 21474 states and 29382 transitions. [2020-12-22 07:11:35,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2020-12-22 07:11:35,237 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:35,238 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:11:35,238 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-12-22 07:11:35,238 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:35,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:35,238 INFO L82 PathProgramCache]: Analyzing trace with hash -1001304476, now seen corresponding path program 1 times [2020-12-22 07:11:35,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:35,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073625403] [2020-12-22 07:11:35,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:35,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:35,399 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 07:11:35,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073625403] [2020-12-22 07:11:35,399 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:35,399 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:11:35,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393212938] [2020-12-22 07:11:35,400 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:11:35,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:35,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:11:35,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:11:35,401 INFO L87 Difference]: Start difference. First operand 21474 states and 29382 transitions. Second operand 4 states. [2020-12-22 07:11:41,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:41,061 INFO L93 Difference]: Finished difference Result 72990 states and 99731 transitions. [2020-12-22 07:11:41,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:11:41,061 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 243 [2020-12-22 07:11:41,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:41,112 INFO L225 Difference]: With dead ends: 72990 [2020-12-22 07:11:41,113 INFO L226 Difference]: Without dead ends: 51609 [2020-12-22 07:11:41,128 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:11:41,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51609 states. [2020-12-22 07:11:45,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51609 to 41081. [2020-12-22 07:11:45,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41081 states. [2020-12-22 07:11:45,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41081 states to 41081 states and 55999 transitions. [2020-12-22 07:11:45,544 INFO L78 Accepts]: Start accepts. Automaton has 41081 states and 55999 transitions. Word has length 243 [2020-12-22 07:11:45,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:45,544 INFO L481 AbstractCegarLoop]: Abstraction has 41081 states and 55999 transitions. [2020-12-22 07:11:45,544 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:11:45,544 INFO L276 IsEmpty]: Start isEmpty. Operand 41081 states and 55999 transitions. [2020-12-22 07:11:45,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2020-12-22 07:11:45,558 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:45,558 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:11:45,558 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-12-22 07:11:45,558 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:45,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:45,559 INFO L82 PathProgramCache]: Analyzing trace with hash 1280465510, now seen corresponding path program 1 times [2020-12-22 07:11:45,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:45,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203379495] [2020-12-22 07:11:45,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:45,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:45,644 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 07:11:45,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203379495] [2020-12-22 07:11:45,645 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:45,645 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:11:45,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276797928] [2020-12-22 07:11:45,646 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:11:45,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:45,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:11:45,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:11:45,646 INFO L87 Difference]: Start difference. First operand 41081 states and 55999 transitions. Second operand 5 states. [2020-12-22 07:11:53,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:53,210 INFO L93 Difference]: Finished difference Result 111745 states and 153445 transitions. [2020-12-22 07:11:53,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:11:53,211 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 243 [2020-12-22 07:11:53,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:53,282 INFO L225 Difference]: With dead ends: 111745 [2020-12-22 07:11:53,282 INFO L226 Difference]: Without dead ends: 70761 [2020-12-22 07:11:53,312 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 07:11:53,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70761 states. [2020-12-22 07:11:58,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70761 to 41657. [2020-12-22 07:11:58,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41657 states. [2020-12-22 07:11:58,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41657 states to 41657 states and 56398 transitions. [2020-12-22 07:11:58,331 INFO L78 Accepts]: Start accepts. Automaton has 41657 states and 56398 transitions. Word has length 243 [2020-12-22 07:11:58,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:58,331 INFO L481 AbstractCegarLoop]: Abstraction has 41657 states and 56398 transitions. [2020-12-22 07:11:58,331 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:11:58,331 INFO L276 IsEmpty]: Start isEmpty. Operand 41657 states and 56398 transitions. [2020-12-22 07:11:58,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2020-12-22 07:11:58,344 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:58,344 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:11:58,344 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-12-22 07:11:58,345 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:58,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:58,345 INFO L82 PathProgramCache]: Analyzing trace with hash 1609774954, now seen corresponding path program 1 times [2020-12-22 07:11:58,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:58,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918461229] [2020-12-22 07:11:58,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:58,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:58,433 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 07:11:58,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918461229] [2020-12-22 07:11:58,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:58,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:11:58,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900690360] [2020-12-22 07:11:58,434 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:11:58,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:58,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:11:58,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:11:58,435 INFO L87 Difference]: Start difference. First operand 41657 states and 56398 transitions. Second operand 5 states. [2020-12-22 07:12:09,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:12:09,397 INFO L93 Difference]: Finished difference Result 138479 states and 189478 transitions. [2020-12-22 07:12:09,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:12:09,397 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 243 [2020-12-22 07:12:09,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:12:09,492 INFO L225 Difference]: With dead ends: 138479 [2020-12-22 07:12:09,492 INFO L226 Difference]: Without dead ends: 96926 [2020-12-22 07:12:09,526 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 07:12:09,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96926 states. [2020-12-22 07:12:15,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96926 to 42764. [2020-12-22 07:12:15,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42764 states. [2020-12-22 07:12:15,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42764 states to 42764 states and 57505 transitions. [2020-12-22 07:12:15,086 INFO L78 Accepts]: Start accepts. Automaton has 42764 states and 57505 transitions. Word has length 243 [2020-12-22 07:12:15,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:12:15,086 INFO L481 AbstractCegarLoop]: Abstraction has 42764 states and 57505 transitions. [2020-12-22 07:12:15,086 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:12:15,087 INFO L276 IsEmpty]: Start isEmpty. Operand 42764 states and 57505 transitions. [2020-12-22 07:12:15,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2020-12-22 07:12:15,100 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:12:15,101 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:12:15,101 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-12-22 07:12:15,101 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:12:15,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:12:15,101 INFO L82 PathProgramCache]: Analyzing trace with hash -1238611476, now seen corresponding path program 1 times [2020-12-22 07:12:15,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:12:15,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396519190] [2020-12-22 07:12:15,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:12:15,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:12:15,201 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 07:12:15,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396519190] [2020-12-22 07:12:15,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:12:15,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:12:15,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13986556] [2020-12-22 07:12:15,202 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:12:15,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:12:15,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:12:15,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:12:15,204 INFO L87 Difference]: Start difference. First operand 42764 states and 57505 transitions. Second operand 4 states. [2020-12-22 07:12:27,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:12:27,601 INFO L93 Difference]: Finished difference Result 145070 states and 194806 transitions. [2020-12-22 07:12:27,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:12:27,602 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 243 [2020-12-22 07:12:27,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:12:27,713 INFO L225 Difference]: With dead ends: 145070 [2020-12-22 07:12:27,713 INFO L226 Difference]: Without dead ends: 102415 [2020-12-22 07:12:27,755 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:12:27,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102415 states. [2020-12-22 07:12:37,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102415 to 81835. [2020-12-22 07:12:37,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81835 states. [2020-12-22 07:12:38,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81835 states to 81835 states and 109662 transitions. [2020-12-22 07:12:38,031 INFO L78 Accepts]: Start accepts. Automaton has 81835 states and 109662 transitions. Word has length 243 [2020-12-22 07:12:38,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:12:38,031 INFO L481 AbstractCegarLoop]: Abstraction has 81835 states and 109662 transitions. [2020-12-22 07:12:38,032 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:12:38,032 INFO L276 IsEmpty]: Start isEmpty. Operand 81835 states and 109662 transitions. [2020-12-22 07:12:38,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2020-12-22 07:12:38,050 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:12:38,050 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:12:38,050 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-12-22 07:12:38,050 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:12:38,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:12:38,051 INFO L82 PathProgramCache]: Analyzing trace with hash -682035539, now seen corresponding path program 1 times [2020-12-22 07:12:38,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:12:38,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749831899] [2020-12-22 07:12:38,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:12:38,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:12:38,341 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 07:12:38,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749831899] [2020-12-22 07:12:38,341 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:12:38,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:12:38,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475749844] [2020-12-22 07:12:38,344 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:12:38,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:12:38,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:12:38,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:12:38,345 INFO L87 Difference]: Start difference. First operand 81835 states and 109662 transitions. Second operand 5 states. [2020-12-22 07:12:54,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:12:54,714 INFO L93 Difference]: Finished difference Result 217261 states and 293268 transitions. [2020-12-22 07:12:54,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:12:54,715 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 243 [2020-12-22 07:12:54,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:12:55,050 INFO L225 Difference]: With dead ends: 217261 [2020-12-22 07:12:55,050 INFO L226 Difference]: Without dead ends: 135539 [2020-12-22 07:12:55,106 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 07:12:55,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135539 states. [2020-12-22 07:13:06,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135539 to 82939. [2020-12-22 07:13:06,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82939 states. [2020-12-22 07:13:06,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82939 states to 82939 states and 110429 transitions. [2020-12-22 07:13:06,339 INFO L78 Accepts]: Start accepts. Automaton has 82939 states and 110429 transitions. Word has length 243 [2020-12-22 07:13:06,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:13:06,339 INFO L481 AbstractCegarLoop]: Abstraction has 82939 states and 110429 transitions. [2020-12-22 07:13:06,339 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:13:06,339 INFO L276 IsEmpty]: Start isEmpty. Operand 82939 states and 110429 transitions. [2020-12-22 07:13:06,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2020-12-22 07:13:06,360 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:13:06,360 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:13:06,360 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-12-22 07:13:06,360 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:13:06,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:13:06,360 INFO L82 PathProgramCache]: Analyzing trace with hash 1214943919, now seen corresponding path program 1 times [2020-12-22 07:13:06,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:13:06,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220880919] [2020-12-22 07:13:06,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:13:06,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:13:06,450 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 07:13:06,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220880919] [2020-12-22 07:13:06,451 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:13:06,451 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:13:06,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666804876] [2020-12-22 07:13:06,452 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:13:06,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:13:06,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:13:06,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:13:06,453 INFO L87 Difference]: Start difference. First operand 82939 states and 110429 transitions. Second operand 5 states. [2020-12-22 07:13:29,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:13:29,776 INFO L93 Difference]: Finished difference Result 265383 states and 356937 transitions. [2020-12-22 07:13:29,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:13:29,777 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 243 [2020-12-22 07:13:29,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:13:30,007 INFO L225 Difference]: With dead ends: 265383 [2020-12-22 07:13:30,007 INFO L226 Difference]: Without dead ends: 182564 [2020-12-22 07:13:30,086 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 07:13:30,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182564 states. [2020-12-22 07:13:42,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182564 to 85054. [2020-12-22 07:13:42,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85054 states. [2020-12-22 07:13:42,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85054 states to 85054 states and 112544 transitions. [2020-12-22 07:13:42,516 INFO L78 Accepts]: Start accepts. Automaton has 85054 states and 112544 transitions. Word has length 243 [2020-12-22 07:13:42,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:13:42,516 INFO L481 AbstractCegarLoop]: Abstraction has 85054 states and 112544 transitions. [2020-12-22 07:13:42,516 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:13:42,516 INFO L276 IsEmpty]: Start isEmpty. Operand 85054 states and 112544 transitions. [2020-12-22 07:13:42,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2020-12-22 07:13:42,543 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:13:42,543 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:13:42,543 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-12-22 07:13:42,544 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:13:42,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:13:42,544 INFO L82 PathProgramCache]: Analyzing trace with hash -572925903, now seen corresponding path program 1 times [2020-12-22 07:13:42,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:13:42,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886400069] [2020-12-22 07:13:42,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:13:42,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat