/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.12.cil-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 07:11:11,218 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 07:11:11,221 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 07:11:11,269 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 07:11:11,270 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 07:11:11,274 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 07:11:11,277 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 07:11:11,284 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 07:11:11,288 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 07:11:11,295 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 07:11:11,296 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 07:11:11,297 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 07:11:11,298 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 07:11:11,301 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 07:11:11,303 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 07:11:11,304 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 07:11:11,305 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 07:11:11,308 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 07:11:11,315 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 07:11:11,323 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 07:11:11,325 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 07:11:11,327 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 07:11:11,328 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 07:11:11,330 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 07:11:11,338 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 07:11:11,343 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 07:11:11,344 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 07:11:11,346 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 07:11:11,347 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 07:11:11,348 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 07:11:11,362 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 07:11:11,363 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 07:11:11,363 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 07:11:11,364 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 07:11:11,365 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 07:11:11,367 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 07:11:11,369 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 07:11:11,397 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 07:11:11,397 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 07:11:11,398 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 07:11:11,399 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 07:11:11,399 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 07:11:11,399 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 07:11:11,399 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 07:11:11,399 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 07:11:11,400 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 07:11:11,400 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 07:11:11,400 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 07:11:11,400 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 07:11:11,400 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 07:11:11,401 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 07:11:11,401 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 07:11:11,401 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 07:11:11,401 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 07:11:11,401 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 07:11:11,402 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 07:11:11,402 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 07:11:11,402 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 07:11:11,402 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 07:11:11,402 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 07:11:11,403 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 07:11:11,403 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 07:11:11,403 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 07:11:11,751 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 07:11:11,778 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 07:11:11,781 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 07:11:11,783 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 07:11:11,783 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 07:11:11,784 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/systemc/token_ring.12.cil-2.c [2020-12-22 07:11:11,867 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53b19d714/ebafb31875ad47569a19affcb70b8e4b/FLAGe2b62be12 [2020-12-22 07:11:12,496 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 07:11:12,496 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/systemc/token_ring.12.cil-2.c [2020-12-22 07:11:12,528 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53b19d714/ebafb31875ad47569a19affcb70b8e4b/FLAGe2b62be12 [2020-12-22 07:11:12,810 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53b19d714/ebafb31875ad47569a19affcb70b8e4b [2020-12-22 07:11:12,813 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 07:11:12,816 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 07:11:12,817 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 07:11:12,817 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 07:11:12,825 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 07:11:12,825 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:11:12" (1/1) ... [2020-12-22 07:11:12,826 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@489b814b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:11:12, skipping insertion in model container [2020-12-22 07:11:12,827 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:11:12" (1/1) ... [2020-12-22 07:11:12,838 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 07:11:12,910 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 07:11:13,146 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.12.cil-2.c[366,379] [2020-12-22 07:11:13,460 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:11:13,477 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 07:11:13,492 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.12.cil-2.c[366,379] [2020-12-22 07:11:13,601 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:11:13,644 INFO L208 MainTranslator]: Completed translation [2020-12-22 07:11:13,645 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:11:13 WrapperNode [2020-12-22 07:11:13,645 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 07:11:13,646 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 07:11:13,646 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 07:11:13,647 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 07:11:13,655 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:11:13" (1/1) ... [2020-12-22 07:11:13,673 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:11:13" (1/1) ... [2020-12-22 07:11:13,857 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 07:11:13,860 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 07:11:13,864 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 07:11:13,864 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 07:11:13,876 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:11:13" (1/1) ... [2020-12-22 07:11:13,876 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:11:13" (1/1) ... [2020-12-22 07:11:13,893 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:11:13" (1/1) ... [2020-12-22 07:11:13,894 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:11:13" (1/1) ... [2020-12-22 07:11:13,962 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:11:13" (1/1) ... [2020-12-22 07:11:14,004 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:11:13" (1/1) ... [2020-12-22 07:11:14,013 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:11:13" (1/1) ... [2020-12-22 07:11:14,025 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 07:11:14,026 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 07:11:14,027 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 07:11:14,027 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 07:11:14,028 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:11:13" (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 07:11:14,135 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 07:11:14,136 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 07:11:14,136 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 07:11:14,136 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 07:11:17,391 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 07:11:17,392 INFO L299 CfgBuilder]: Removed 553 assume(true) statements. [2020-12-22 07:11:17,396 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:11:17 BoogieIcfgContainer [2020-12-22 07:11:17,396 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 07:11:17,398 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 07:11:17,398 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 07:11:17,402 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 07:11:17,402 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 07:11:12" (1/3) ... [2020-12-22 07:11:17,403 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@578a94a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:11:17, skipping insertion in model container [2020-12-22 07:11:17,403 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:11:13" (2/3) ... [2020-12-22 07:11:17,403 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@578a94a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:11:17, skipping insertion in model container [2020-12-22 07:11:17,404 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:11:17" (3/3) ... [2020-12-22 07:11:17,405 INFO L111 eAbstractionObserver]: Analyzing ICFG token_ring.12.cil-2.c [2020-12-22 07:11:17,412 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 07:11:17,419 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 07:11:17,439 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 07:11:17,480 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 07:11:17,480 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 07:11:17,481 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 07:11:17,481 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 07:11:17,481 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 07:11:17,481 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 07:11:17,481 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 07:11:17,481 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 07:11:17,523 INFO L276 IsEmpty]: Start isEmpty. Operand 1758 states. [2020-12-22 07:11:17,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-12-22 07:11:17,539 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:17,540 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:11:17,540 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:17,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:17,547 INFO L82 PathProgramCache]: Analyzing trace with hash 1063150512, now seen corresponding path program 1 times [2020-12-22 07:11:17,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:17,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207439457] [2020-12-22 07:11:17,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:17,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:17,920 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 07:11:17,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207439457] [2020-12-22 07:11:17,922 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:17,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:11:17,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647421164] [2020-12-22 07:11:17,928 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:11:17,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:17,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:11:17,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:11:17,945 INFO L87 Difference]: Start difference. First operand 1758 states. Second operand 3 states. [2020-12-22 07:11:18,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:18,164 INFO L93 Difference]: Finished difference Result 3511 states and 5293 transitions. [2020-12-22 07:11:18,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:11:18,167 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 160 [2020-12-22 07:11:18,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:18,202 INFO L225 Difference]: With dead ends: 3511 [2020-12-22 07:11:18,203 INFO L226 Difference]: Without dead ends: 1754 [2020-12-22 07:11:18,218 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 07:11:18,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1754 states. [2020-12-22 07:11:18,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1754 to 1754. [2020-12-22 07:11:18,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1754 states. [2020-12-22 07:11:18,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1754 states to 1754 states and 2614 transitions. [2020-12-22 07:11:18,392 INFO L78 Accepts]: Start accepts. Automaton has 1754 states and 2614 transitions. Word has length 160 [2020-12-22 07:11:18,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:18,392 INFO L481 AbstractCegarLoop]: Abstraction has 1754 states and 2614 transitions. [2020-12-22 07:11:18,392 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:11:18,393 INFO L276 IsEmpty]: Start isEmpty. Operand 1754 states and 2614 transitions. [2020-12-22 07:11:18,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-12-22 07:11:18,406 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:18,409 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:11:18,409 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 07:11:18,409 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:18,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:18,410 INFO L82 PathProgramCache]: Analyzing trace with hash 82195698, now seen corresponding path program 1 times [2020-12-22 07:11:18,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:18,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487176595] [2020-12-22 07:11:18,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:18,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:18,544 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 07:11:18,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487176595] [2020-12-22 07:11:18,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:18,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:11:18,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964199871] [2020-12-22 07:11:18,547 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:11:18,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:18,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:11:18,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:11:18,549 INFO L87 Difference]: Start difference. First operand 1754 states and 2614 transitions. Second operand 3 states. [2020-12-22 07:11:18,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:18,630 INFO L93 Difference]: Finished difference Result 3495 states and 5206 transitions. [2020-12-22 07:11:18,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:11:18,631 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 160 [2020-12-22 07:11:18,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:18,640 INFO L225 Difference]: With dead ends: 3495 [2020-12-22 07:11:18,640 INFO L226 Difference]: Without dead ends: 1754 [2020-12-22 07:11:18,644 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 07:11:18,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1754 states. [2020-12-22 07:11:18,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1754 to 1754. [2020-12-22 07:11:18,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1754 states. [2020-12-22 07:11:18,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1754 states to 1754 states and 2613 transitions. [2020-12-22 07:11:18,706 INFO L78 Accepts]: Start accepts. Automaton has 1754 states and 2613 transitions. Word has length 160 [2020-12-22 07:11:18,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:18,708 INFO L481 AbstractCegarLoop]: Abstraction has 1754 states and 2613 transitions. [2020-12-22 07:11:18,708 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:11:18,709 INFO L276 IsEmpty]: Start isEmpty. Operand 1754 states and 2613 transitions. [2020-12-22 07:11:18,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-12-22 07:11:18,712 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:18,713 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:11:18,713 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 07:11:18,713 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:18,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:18,717 INFO L82 PathProgramCache]: Analyzing trace with hash 346843188, now seen corresponding path program 1 times [2020-12-22 07:11:18,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:18,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22506523] [2020-12-22 07:11:18,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:18,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:18,946 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 07:11:18,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22506523] [2020-12-22 07:11:18,947 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:18,947 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:11:18,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815594658] [2020-12-22 07:11:18,948 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:11:18,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:18,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:11:18,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:11:18,955 INFO L87 Difference]: Start difference. First operand 1754 states and 2613 transitions. Second operand 3 states. [2020-12-22 07:11:19,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:19,195 INFO L93 Difference]: Finished difference Result 4994 states and 7417 transitions. [2020-12-22 07:11:19,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:11:19,196 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 160 [2020-12-22 07:11:19,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:19,220 INFO L225 Difference]: With dead ends: 4994 [2020-12-22 07:11:19,220 INFO L226 Difference]: Without dead ends: 3257 [2020-12-22 07:11:19,229 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 07:11:19,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3257 states. [2020-12-22 07:11:19,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3257 to 3255. [2020-12-22 07:11:19,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3255 states. [2020-12-22 07:11:19,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3255 states to 3255 states and 4828 transitions. [2020-12-22 07:11:19,409 INFO L78 Accepts]: Start accepts. Automaton has 3255 states and 4828 transitions. Word has length 160 [2020-12-22 07:11:19,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:19,416 INFO L481 AbstractCegarLoop]: Abstraction has 3255 states and 4828 transitions. [2020-12-22 07:11:19,417 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:11:19,417 INFO L276 IsEmpty]: Start isEmpty. Operand 3255 states and 4828 transitions. [2020-12-22 07:11:19,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-12-22 07:11:19,420 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:19,420 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:11:19,420 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 07:11:19,420 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:19,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:19,421 INFO L82 PathProgramCache]: Analyzing trace with hash -686676560, now seen corresponding path program 1 times [2020-12-22 07:11:19,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:19,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957884645] [2020-12-22 07:11:19,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:19,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:19,591 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 07:11:19,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957884645] [2020-12-22 07:11:19,592 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:19,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:11:19,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944726682] [2020-12-22 07:11:19,594 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:11:19,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:19,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:11:19,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:11:19,596 INFO L87 Difference]: Start difference. First operand 3255 states and 4828 transitions. Second operand 4 states. [2020-12-22 07:11:19,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:19,981 INFO L93 Difference]: Finished difference Result 7994 states and 11842 transitions. [2020-12-22 07:11:19,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:11:19,982 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 160 [2020-12-22 07:11:19,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:20,007 INFO L225 Difference]: With dead ends: 7994 [2020-12-22 07:11:20,008 INFO L226 Difference]: Without dead ends: 4757 [2020-12-22 07:11:20,015 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 07:11:20,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4757 states. [2020-12-22 07:11:20,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4757 to 3255. [2020-12-22 07:11:20,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3255 states. [2020-12-22 07:11:20,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3255 states to 3255 states and 4825 transitions. [2020-12-22 07:11:20,183 INFO L78 Accepts]: Start accepts. Automaton has 3255 states and 4825 transitions. Word has length 160 [2020-12-22 07:11:20,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:20,184 INFO L481 AbstractCegarLoop]: Abstraction has 3255 states and 4825 transitions. [2020-12-22 07:11:20,184 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:11:20,184 INFO L276 IsEmpty]: Start isEmpty. Operand 3255 states and 4825 transitions. [2020-12-22 07:11:20,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-12-22 07:11:20,186 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:20,186 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:11:20,186 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 07:11:20,186 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:20,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:20,187 INFO L82 PathProgramCache]: Analyzing trace with hash -260122062, now seen corresponding path program 1 times [2020-12-22 07:11:20,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:20,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15928964] [2020-12-22 07:11:20,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:20,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:20,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:11:20,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15928964] [2020-12-22 07:11:20,295 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:20,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:11:20,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969663445] [2020-12-22 07:11:20,296 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:11:20,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:20,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:11:20,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:11:20,299 INFO L87 Difference]: Start difference. First operand 3255 states and 4825 transitions. Second operand 4 states. [2020-12-22 07:11:20,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:20,661 INFO L93 Difference]: Finished difference Result 7992 states and 11832 transitions. [2020-12-22 07:11:20,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:11:20,664 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 160 [2020-12-22 07:11:20,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:20,688 INFO L225 Difference]: With dead ends: 7992 [2020-12-22 07:11:20,689 INFO L226 Difference]: Without dead ends: 4756 [2020-12-22 07:11:20,696 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 07:11:20,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4756 states. [2020-12-22 07:11:20,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4756 to 3255. [2020-12-22 07:11:20,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3255 states. [2020-12-22 07:11:20,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3255 states to 3255 states and 4822 transitions. [2020-12-22 07:11:20,872 INFO L78 Accepts]: Start accepts. Automaton has 3255 states and 4822 transitions. Word has length 160 [2020-12-22 07:11:20,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:20,873 INFO L481 AbstractCegarLoop]: Abstraction has 3255 states and 4822 transitions. [2020-12-22 07:11:20,873 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:11:20,873 INFO L276 IsEmpty]: Start isEmpty. Operand 3255 states and 4822 transitions. [2020-12-22 07:11:20,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-12-22 07:11:20,875 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:20,876 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:11:20,876 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 07:11:20,876 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:20,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:20,876 INFO L82 PathProgramCache]: Analyzing trace with hash -800551568, now seen corresponding path program 1 times [2020-12-22 07:11:20,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:20,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136986838] [2020-12-22 07:11:20,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:20,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:20,983 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 07:11:20,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136986838] [2020-12-22 07:11:20,984 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:20,984 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:11:20,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093563866] [2020-12-22 07:11:20,985 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:11:20,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:20,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:11:20,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:11:20,986 INFO L87 Difference]: Start difference. First operand 3255 states and 4822 transitions. Second operand 4 states. [2020-12-22 07:11:21,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:21,430 INFO L93 Difference]: Finished difference Result 7990 states and 11822 transitions. [2020-12-22 07:11:21,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:11:21,431 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 160 [2020-12-22 07:11:21,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:21,461 INFO L225 Difference]: With dead ends: 7990 [2020-12-22 07:11:21,462 INFO L226 Difference]: Without dead ends: 4755 [2020-12-22 07:11:21,470 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 07:11:21,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4755 states. [2020-12-22 07:11:21,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4755 to 3255. [2020-12-22 07:11:21,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3255 states. [2020-12-22 07:11:21,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3255 states to 3255 states and 4819 transitions. [2020-12-22 07:11:21,678 INFO L78 Accepts]: Start accepts. Automaton has 3255 states and 4819 transitions. Word has length 160 [2020-12-22 07:11:21,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:21,678 INFO L481 AbstractCegarLoop]: Abstraction has 3255 states and 4819 transitions. [2020-12-22 07:11:21,679 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:11:21,679 INFO L276 IsEmpty]: Start isEmpty. Operand 3255 states and 4819 transitions. [2020-12-22 07:11:21,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-12-22 07:11:21,681 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:21,681 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:11:21,681 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 07:11:21,681 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:21,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:21,687 INFO L82 PathProgramCache]: Analyzing trace with hash -956532110, now seen corresponding path program 1 times [2020-12-22 07:11:21,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:21,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697913679] [2020-12-22 07:11:21,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:21,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:21,799 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 07:11:21,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697913679] [2020-12-22 07:11:21,800 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:21,800 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:11:21,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482509757] [2020-12-22 07:11:21,801 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:11:21,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:21,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:11:21,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:11:21,813 INFO L87 Difference]: Start difference. First operand 3255 states and 4819 transitions. Second operand 3 states. [2020-12-22 07:11:22,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:22,010 INFO L93 Difference]: Finished difference Result 6488 states and 9603 transitions. [2020-12-22 07:11:22,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:11:22,011 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 160 [2020-12-22 07:11:22,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:22,028 INFO L225 Difference]: With dead ends: 6488 [2020-12-22 07:11:22,028 INFO L226 Difference]: Without dead ends: 3255 [2020-12-22 07:11:22,035 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 07:11:22,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3255 states. [2020-12-22 07:11:22,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3255 to 3255. [2020-12-22 07:11:22,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3255 states. [2020-12-22 07:11:22,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3255 states to 3255 states and 4811 transitions. [2020-12-22 07:11:22,237 INFO L78 Accepts]: Start accepts. Automaton has 3255 states and 4811 transitions. Word has length 160 [2020-12-22 07:11:22,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:22,237 INFO L481 AbstractCegarLoop]: Abstraction has 3255 states and 4811 transitions. [2020-12-22 07:11:22,237 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:11:22,237 INFO L276 IsEmpty]: Start isEmpty. Operand 3255 states and 4811 transitions. [2020-12-22 07:11:22,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-12-22 07:11:22,239 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:22,239 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:11:22,239 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 07:11:22,240 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:22,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:22,240 INFO L82 PathProgramCache]: Analyzing trace with hash 1550565364, now seen corresponding path program 1 times [2020-12-22 07:11:22,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:22,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632294392] [2020-12-22 07:11:22,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:22,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:22,323 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 07:11:22,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632294392] [2020-12-22 07:11:22,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:22,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:11:22,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297675614] [2020-12-22 07:11:22,325 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:11:22,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:22,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:11:22,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:11:22,326 INFO L87 Difference]: Start difference. First operand 3255 states and 4811 transitions. Second operand 4 states. [2020-12-22 07:11:22,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:22,689 INFO L93 Difference]: Finished difference Result 7984 states and 11787 transitions. [2020-12-22 07:11:22,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:11:22,689 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 160 [2020-12-22 07:11:22,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:22,725 INFO L225 Difference]: With dead ends: 7984 [2020-12-22 07:11:22,726 INFO L226 Difference]: Without dead ends: 4752 [2020-12-22 07:11:22,733 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 07:11:22,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4752 states. [2020-12-22 07:11:22,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4752 to 3255. [2020-12-22 07:11:22,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3255 states. [2020-12-22 07:11:22,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3255 states to 3255 states and 4808 transitions. [2020-12-22 07:11:22,937 INFO L78 Accepts]: Start accepts. Automaton has 3255 states and 4808 transitions. Word has length 160 [2020-12-22 07:11:22,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:22,938 INFO L481 AbstractCegarLoop]: Abstraction has 3255 states and 4808 transitions. [2020-12-22 07:11:22,938 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:11:22,938 INFO L276 IsEmpty]: Start isEmpty. Operand 3255 states and 4808 transitions. [2020-12-22 07:11:22,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-12-22 07:11:22,940 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:22,941 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:11:22,941 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 07:11:22,941 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:22,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:22,942 INFO L82 PathProgramCache]: Analyzing trace with hash -585317838, now seen corresponding path program 1 times [2020-12-22 07:11:22,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:22,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54471401] [2020-12-22 07:11:22,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:22,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:23,015 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 07:11:23,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54471401] [2020-12-22 07:11:23,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:23,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:11:23,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009186186] [2020-12-22 07:11:23,022 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:11:23,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:23,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:11:23,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:11:23,023 INFO L87 Difference]: Start difference. First operand 3255 states and 4808 transitions. Second operand 4 states. [2020-12-22 07:11:23,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:23,389 INFO L93 Difference]: Finished difference Result 7982 states and 11777 transitions. [2020-12-22 07:11:23,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:11:23,390 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 160 [2020-12-22 07:11:23,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:23,404 INFO L225 Difference]: With dead ends: 7982 [2020-12-22 07:11:23,404 INFO L226 Difference]: Without dead ends: 4751 [2020-12-22 07:11:23,411 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 07:11:23,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4751 states. [2020-12-22 07:11:23,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4751 to 3255. [2020-12-22 07:11:23,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3255 states. [2020-12-22 07:11:23,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3255 states to 3255 states and 4805 transitions. [2020-12-22 07:11:23,632 INFO L78 Accepts]: Start accepts. Automaton has 3255 states and 4805 transitions. Word has length 160 [2020-12-22 07:11:23,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:23,632 INFO L481 AbstractCegarLoop]: Abstraction has 3255 states and 4805 transitions. [2020-12-22 07:11:23,632 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:11:23,632 INFO L276 IsEmpty]: Start isEmpty. Operand 3255 states and 4805 transitions. [2020-12-22 07:11:23,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-12-22 07:11:23,634 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:23,635 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:11:23,635 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 07:11:23,635 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:23,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:23,636 INFO L82 PathProgramCache]: Analyzing trace with hash -515669964, now seen corresponding path program 1 times [2020-12-22 07:11:23,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:23,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346819667] [2020-12-22 07:11:23,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:23,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:23,739 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 07:11:23,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346819667] [2020-12-22 07:11:23,740 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:23,740 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:11:23,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794876428] [2020-12-22 07:11:23,741 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:11:23,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:23,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:11:23,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:11:23,742 INFO L87 Difference]: Start difference. First operand 3255 states and 4805 transitions. Second operand 4 states. [2020-12-22 07:11:24,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:24,091 INFO L93 Difference]: Finished difference Result 7980 states and 11767 transitions. [2020-12-22 07:11:24,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:11:24,093 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 160 [2020-12-22 07:11:24,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:24,103 INFO L225 Difference]: With dead ends: 7980 [2020-12-22 07:11:24,104 INFO L226 Difference]: Without dead ends: 4750 [2020-12-22 07:11:24,111 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 07:11:24,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4750 states. [2020-12-22 07:11:24,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4750 to 3255. [2020-12-22 07:11:24,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3255 states. [2020-12-22 07:11:24,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3255 states to 3255 states and 4802 transitions. [2020-12-22 07:11:24,305 INFO L78 Accepts]: Start accepts. Automaton has 3255 states and 4802 transitions. Word has length 160 [2020-12-22 07:11:24,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:24,305 INFO L481 AbstractCegarLoop]: Abstraction has 3255 states and 4802 transitions. [2020-12-22 07:11:24,305 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:11:24,305 INFO L276 IsEmpty]: Start isEmpty. Operand 3255 states and 4802 transitions. [2020-12-22 07:11:24,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-12-22 07:11:24,307 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:24,307 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:11:24,307 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 07:11:24,308 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:24,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:24,308 INFO L82 PathProgramCache]: Analyzing trace with hash -97781262, now seen corresponding path program 1 times [2020-12-22 07:11:24,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:24,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846399690] [2020-12-22 07:11:24,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:24,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:24,396 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 07:11:24,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846399690] [2020-12-22 07:11:24,396 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:24,397 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:11:24,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591000109] [2020-12-22 07:11:24,397 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:11:24,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:24,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:11:24,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:11:24,398 INFO L87 Difference]: Start difference. First operand 3255 states and 4802 transitions. Second operand 4 states. [2020-12-22 07:11:24,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:24,730 INFO L93 Difference]: Finished difference Result 7978 states and 11757 transitions. [2020-12-22 07:11:24,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:11:24,731 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 160 [2020-12-22 07:11:24,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:24,742 INFO L225 Difference]: With dead ends: 7978 [2020-12-22 07:11:24,742 INFO L226 Difference]: Without dead ends: 4749 [2020-12-22 07:11:24,750 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 07:11:24,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4749 states. [2020-12-22 07:11:24,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4749 to 3255. [2020-12-22 07:11:24,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3255 states. [2020-12-22 07:11:24,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3255 states to 3255 states and 4799 transitions. [2020-12-22 07:11:24,985 INFO L78 Accepts]: Start accepts. Automaton has 3255 states and 4799 transitions. Word has length 160 [2020-12-22 07:11:24,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:24,985 INFO L481 AbstractCegarLoop]: Abstraction has 3255 states and 4799 transitions. [2020-12-22 07:11:24,985 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:11:24,985 INFO L276 IsEmpty]: Start isEmpty. Operand 3255 states and 4799 transitions. [2020-12-22 07:11:24,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-12-22 07:11:24,987 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:24,987 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:11:24,988 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 07:11:24,988 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:24,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:24,988 INFO L82 PathProgramCache]: Analyzing trace with hash 1301172340, now seen corresponding path program 1 times [2020-12-22 07:11:24,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:24,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455502430] [2020-12-22 07:11:24,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:25,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:25,066 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 07:11:25,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455502430] [2020-12-22 07:11:25,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:25,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:11:25,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120130527] [2020-12-22 07:11:25,068 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:11:25,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:25,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:11:25,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:11:25,069 INFO L87 Difference]: Start difference. First operand 3255 states and 4799 transitions. Second operand 3 states. [2020-12-22 07:11:25,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:25,261 INFO L93 Difference]: Finished difference Result 6483 states and 9558 transitions. [2020-12-22 07:11:25,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:11:25,261 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 160 [2020-12-22 07:11:25,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:25,269 INFO L225 Difference]: With dead ends: 6483 [2020-12-22 07:11:25,270 INFO L226 Difference]: Without dead ends: 3255 [2020-12-22 07:11:25,276 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 07:11:25,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3255 states. [2020-12-22 07:11:25,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3255 to 3255. [2020-12-22 07:11:25,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3255 states. [2020-12-22 07:11:25,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3255 states to 3255 states and 4791 transitions. [2020-12-22 07:11:25,465 INFO L78 Accepts]: Start accepts. Automaton has 3255 states and 4791 transitions. Word has length 160 [2020-12-22 07:11:25,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:25,465 INFO L481 AbstractCegarLoop]: Abstraction has 3255 states and 4791 transitions. [2020-12-22 07:11:25,465 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:11:25,465 INFO L276 IsEmpty]: Start isEmpty. Operand 3255 states and 4791 transitions. [2020-12-22 07:11:25,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-12-22 07:11:25,467 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:25,467 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:11:25,468 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 07:11:25,468 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:25,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:25,468 INFO L82 PathProgramCache]: Analyzing trace with hash -293635856, now seen corresponding path program 1 times [2020-12-22 07:11:25,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:25,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439334883] [2020-12-22 07:11:25,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:25,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:25,581 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 07:11:25,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439334883] [2020-12-22 07:11:25,582 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:25,582 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:11:25,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114314094] [2020-12-22 07:11:25,583 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:11:25,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:25,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:11:25,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:11:25,584 INFO L87 Difference]: Start difference. First operand 3255 states and 4791 transitions. Second operand 4 states. [2020-12-22 07:11:25,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:25,927 INFO L93 Difference]: Finished difference Result 7974 states and 11726 transitions. [2020-12-22 07:11:25,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:11:25,927 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 160 [2020-12-22 07:11:25,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:25,941 INFO L225 Difference]: With dead ends: 7974 [2020-12-22 07:11:25,941 INFO L226 Difference]: Without dead ends: 4747 [2020-12-22 07:11:25,953 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 07:11:25,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4747 states. [2020-12-22 07:11:26,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4747 to 3255. [2020-12-22 07:11:26,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3255 states. [2020-12-22 07:11:26,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3255 states to 3255 states and 4788 transitions. [2020-12-22 07:11:26,210 INFO L78 Accepts]: Start accepts. Automaton has 3255 states and 4788 transitions. Word has length 160 [2020-12-22 07:11:26,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:26,212 INFO L481 AbstractCegarLoop]: Abstraction has 3255 states and 4788 transitions. [2020-12-22 07:11:26,212 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:11:26,212 INFO L276 IsEmpty]: Start isEmpty. Operand 3255 states and 4788 transitions. [2020-12-22 07:11:26,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-12-22 07:11:26,214 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:26,214 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:11:26,215 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 07:11:26,215 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:26,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:26,216 INFO L82 PathProgramCache]: Analyzing trace with hash 69830642, now seen corresponding path program 1 times [2020-12-22 07:11:26,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:26,216 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084367668] [2020-12-22 07:11:26,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:26,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:26,308 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 07:11:26,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084367668] [2020-12-22 07:11:26,308 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:26,309 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:11:26,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489578745] [2020-12-22 07:11:26,309 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:11:26,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:26,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:11:26,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:11:26,311 INFO L87 Difference]: Start difference. First operand 3255 states and 4788 transitions. Second operand 4 states. [2020-12-22 07:11:26,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:26,816 INFO L93 Difference]: Finished difference Result 7879 states and 11582 transitions. [2020-12-22 07:11:26,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:11:26,816 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 160 [2020-12-22 07:11:26,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:26,826 INFO L225 Difference]: With dead ends: 7879 [2020-12-22 07:11:26,826 INFO L226 Difference]: Without dead ends: 4654 [2020-12-22 07:11:26,835 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 07:11:26,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4654 states. [2020-12-22 07:11:27,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4654 to 3255. [2020-12-22 07:11:27,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3255 states. [2020-12-22 07:11:27,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3255 states to 3255 states and 4785 transitions. [2020-12-22 07:11:27,076 INFO L78 Accepts]: Start accepts. Automaton has 3255 states and 4785 transitions. Word has length 160 [2020-12-22 07:11:27,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:27,077 INFO L481 AbstractCegarLoop]: Abstraction has 3255 states and 4785 transitions. [2020-12-22 07:11:27,077 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:11:27,077 INFO L276 IsEmpty]: Start isEmpty. Operand 3255 states and 4785 transitions. [2020-12-22 07:11:27,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-12-22 07:11:27,079 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:27,079 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:11:27,079 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 07:11:27,080 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:27,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:27,080 INFO L82 PathProgramCache]: Analyzing trace with hash -475041932, now seen corresponding path program 1 times [2020-12-22 07:11:27,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:27,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496681679] [2020-12-22 07:11:27,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:27,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:27,163 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 07:11:27,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496681679] [2020-12-22 07:11:27,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:27,164 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:11:27,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342395966] [2020-12-22 07:11:27,165 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:11:27,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:27,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:11:27,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:11:27,166 INFO L87 Difference]: Start difference. First operand 3255 states and 4785 transitions. Second operand 4 states. [2020-12-22 07:11:27,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:27,637 INFO L93 Difference]: Finished difference Result 7877 states and 11572 transitions. [2020-12-22 07:11:27,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:11:27,638 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 160 [2020-12-22 07:11:27,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:27,647 INFO L225 Difference]: With dead ends: 7877 [2020-12-22 07:11:27,648 INFO L226 Difference]: Without dead ends: 4653 [2020-12-22 07:11:27,657 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 07:11:27,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4653 states. [2020-12-22 07:11:27,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4653 to 3255. [2020-12-22 07:11:27,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3255 states. [2020-12-22 07:11:27,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3255 states to 3255 states and 4782 transitions. [2020-12-22 07:11:27,909 INFO L78 Accepts]: Start accepts. Automaton has 3255 states and 4782 transitions. Word has length 160 [2020-12-22 07:11:27,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:27,910 INFO L481 AbstractCegarLoop]: Abstraction has 3255 states and 4782 transitions. [2020-12-22 07:11:27,910 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:11:27,910 INFO L276 IsEmpty]: Start isEmpty. Operand 3255 states and 4782 transitions. [2020-12-22 07:11:27,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-12-22 07:11:27,912 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:27,912 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:11:27,912 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 07:11:27,913 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:27,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:27,913 INFO L82 PathProgramCache]: Analyzing trace with hash 200118194, now seen corresponding path program 1 times [2020-12-22 07:11:27,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:27,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868664120] [2020-12-22 07:11:27,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:27,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:27,971 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 07:11:27,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868664120] [2020-12-22 07:11:27,971 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:27,971 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:11:27,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612809192] [2020-12-22 07:11:27,972 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:11:27,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:27,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:11:27,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:11:27,973 INFO L87 Difference]: Start difference. First operand 3255 states and 4782 transitions. Second operand 3 states. [2020-12-22 07:11:28,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:28,237 INFO L93 Difference]: Finished difference Result 6478 states and 9518 transitions. [2020-12-22 07:11:28,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:11:28,237 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 160 [2020-12-22 07:11:28,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:28,244 INFO L225 Difference]: With dead ends: 6478 [2020-12-22 07:11:28,244 INFO L226 Difference]: Without dead ends: 3255 [2020-12-22 07:11:28,249 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 07:11:28,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3255 states. [2020-12-22 07:11:28,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3255 to 3255. [2020-12-22 07:11:28,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3255 states. [2020-12-22 07:11:28,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3255 states to 3255 states and 4746 transitions. [2020-12-22 07:11:28,454 INFO L78 Accepts]: Start accepts. Automaton has 3255 states and 4746 transitions. Word has length 160 [2020-12-22 07:11:28,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:28,455 INFO L481 AbstractCegarLoop]: Abstraction has 3255 states and 4746 transitions. [2020-12-22 07:11:28,455 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:11:28,455 INFO L276 IsEmpty]: Start isEmpty. Operand 3255 states and 4746 transitions. [2020-12-22 07:11:28,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-12-22 07:11:28,457 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:28,457 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:11:28,457 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 07:11:28,458 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:28,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:28,458 INFO L82 PathProgramCache]: Analyzing trace with hash -319925257, now seen corresponding path program 1 times [2020-12-22 07:11:28,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:28,459 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99921133] [2020-12-22 07:11:28,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:28,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:28,548 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 07:11:28,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99921133] [2020-12-22 07:11:28,549 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:28,549 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:11:28,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369238057] [2020-12-22 07:11:28,550 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:11:28,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:28,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:11:28,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:11:28,551 INFO L87 Difference]: Start difference. First operand 3255 states and 4746 transitions. Second operand 4 states. [2020-12-22 07:11:29,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:29,029 INFO L93 Difference]: Finished difference Result 7873 states and 11473 transitions. [2020-12-22 07:11:29,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:11:29,029 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 160 [2020-12-22 07:11:29,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:29,046 INFO L225 Difference]: With dead ends: 7873 [2020-12-22 07:11:29,046 INFO L226 Difference]: Without dead ends: 4651 [2020-12-22 07:11:29,053 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 07:11:29,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4651 states. [2020-12-22 07:11:29,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4651 to 3255. [2020-12-22 07:11:29,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3255 states. [2020-12-22 07:11:29,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3255 states to 3255 states and 4743 transitions. [2020-12-22 07:11:29,246 INFO L78 Accepts]: Start accepts. Automaton has 3255 states and 4743 transitions. Word has length 160 [2020-12-22 07:11:29,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:29,246 INFO L481 AbstractCegarLoop]: Abstraction has 3255 states and 4743 transitions. [2020-12-22 07:11:29,246 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:11:29,246 INFO L276 IsEmpty]: Start isEmpty. Operand 3255 states and 4743 transitions. [2020-12-22 07:11:29,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-12-22 07:11:29,248 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:29,248 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:11:29,249 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 07:11:29,249 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:29,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:29,250 INFO L82 PathProgramCache]: Analyzing trace with hash -904696907, now seen corresponding path program 1 times [2020-12-22 07:11:29,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:29,250 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272544876] [2020-12-22 07:11:29,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:29,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:29,346 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 07:11:29,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272544876] [2020-12-22 07:11:29,347 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:29,347 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:11:29,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038944530] [2020-12-22 07:11:29,350 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:11:29,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:29,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:11:29,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:11:29,351 INFO L87 Difference]: Start difference. First operand 3255 states and 4743 transitions. Second operand 4 states. [2020-12-22 07:11:29,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:29,964 INFO L93 Difference]: Finished difference Result 7871 states and 11463 transitions. [2020-12-22 07:11:29,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:11:29,964 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 160 [2020-12-22 07:11:29,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:29,974 INFO L225 Difference]: With dead ends: 7871 [2020-12-22 07:11:29,974 INFO L226 Difference]: Without dead ends: 4650 [2020-12-22 07:11:29,981 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 07:11:29,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4650 states. [2020-12-22 07:11:30,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4650 to 3255. [2020-12-22 07:11:30,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3255 states. [2020-12-22 07:11:30,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3255 states to 3255 states and 4740 transitions. [2020-12-22 07:11:30,251 INFO L78 Accepts]: Start accepts. Automaton has 3255 states and 4740 transitions. Word has length 160 [2020-12-22 07:11:30,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:30,251 INFO L481 AbstractCegarLoop]: Abstraction has 3255 states and 4740 transitions. [2020-12-22 07:11:30,251 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:11:30,251 INFO L276 IsEmpty]: Start isEmpty. Operand 3255 states and 4740 transitions. [2020-12-22 07:11:30,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-12-22 07:11:30,253 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:30,253 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:11:30,254 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 07:11:30,254 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:30,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:30,254 INFO L82 PathProgramCache]: Analyzing trace with hash -1339202505, now seen corresponding path program 1 times [2020-12-22 07:11:30,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:30,255 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529411006] [2020-12-22 07:11:30,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:30,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:30,320 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 07:11:30,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529411006] [2020-12-22 07:11:30,321 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:30,321 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:11:30,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248187464] [2020-12-22 07:11:30,323 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:11:30,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:30,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:11:30,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:11:30,324 INFO L87 Difference]: Start difference. First operand 3255 states and 4740 transitions. Second operand 4 states. [2020-12-22 07:11:30,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:30,813 INFO L93 Difference]: Finished difference Result 7869 states and 11453 transitions. [2020-12-22 07:11:30,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:11:30,813 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 160 [2020-12-22 07:11:30,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:30,821 INFO L225 Difference]: With dead ends: 7869 [2020-12-22 07:11:30,821 INFO L226 Difference]: Without dead ends: 4649 [2020-12-22 07:11:30,826 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 07:11:30,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4649 states. [2020-12-22 07:11:31,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4649 to 3255. [2020-12-22 07:11:31,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3255 states. [2020-12-22 07:11:31,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3255 states to 3255 states and 4737 transitions. [2020-12-22 07:11:31,073 INFO L78 Accepts]: Start accepts. Automaton has 3255 states and 4737 transitions. Word has length 160 [2020-12-22 07:11:31,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:31,073 INFO L481 AbstractCegarLoop]: Abstraction has 3255 states and 4737 transitions. [2020-12-22 07:11:31,073 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:11:31,073 INFO L276 IsEmpty]: Start isEmpty. Operand 3255 states and 4737 transitions. [2020-12-22 07:11:31,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-12-22 07:11:31,074 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:31,075 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:11:31,075 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 07:11:31,075 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:31,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:31,076 INFO L82 PathProgramCache]: Analyzing trace with hash -1768860811, now seen corresponding path program 1 times [2020-12-22 07:11:31,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:31,076 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600050013] [2020-12-22 07:11:31,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:31,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:31,135 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 07:11:31,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600050013] [2020-12-22 07:11:31,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:31,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:11:31,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568606039] [2020-12-22 07:11:31,137 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:11:31,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:31,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:11:31,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:11:31,138 INFO L87 Difference]: Start difference. First operand 3255 states and 4737 transitions. Second operand 4 states. [2020-12-22 07:11:31,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:31,646 INFO L93 Difference]: Finished difference Result 7867 states and 11443 transitions. [2020-12-22 07:11:31,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:11:31,646 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 160 [2020-12-22 07:11:31,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:31,650 INFO L225 Difference]: With dead ends: 7867 [2020-12-22 07:11:31,650 INFO L226 Difference]: Without dead ends: 4648 [2020-12-22 07:11:31,654 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 07:11:31,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4648 states. [2020-12-22 07:11:31,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4648 to 3255. [2020-12-22 07:11:31,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3255 states. [2020-12-22 07:11:31,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3255 states to 3255 states and 4734 transitions. [2020-12-22 07:11:31,920 INFO L78 Accepts]: Start accepts. Automaton has 3255 states and 4734 transitions. Word has length 160 [2020-12-22 07:11:31,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:31,920 INFO L481 AbstractCegarLoop]: Abstraction has 3255 states and 4734 transitions. [2020-12-22 07:11:31,920 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:11:31,921 INFO L276 IsEmpty]: Start isEmpty. Operand 3255 states and 4734 transitions. [2020-12-22 07:11:31,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-12-22 07:11:31,922 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:31,922 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:11:31,922 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 07:11:31,922 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:31,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:31,923 INFO L82 PathProgramCache]: Analyzing trace with hash 1819509879, now seen corresponding path program 1 times [2020-12-22 07:11:31,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:31,923 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945192009] [2020-12-22 07:11:31,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:31,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:31,980 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 07:11:31,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945192009] [2020-12-22 07:11:31,980 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:31,981 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:11:31,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262757853] [2020-12-22 07:11:31,981 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:11:31,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:31,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:11:31,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:11:31,982 INFO L87 Difference]: Start difference. First operand 3255 states and 4734 transitions. Second operand 4 states. [2020-12-22 07:11:32,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:32,444 INFO L93 Difference]: Finished difference Result 7863 states and 11429 transitions. [2020-12-22 07:11:32,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:11:32,445 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 160 [2020-12-22 07:11:32,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:32,449 INFO L225 Difference]: With dead ends: 7863 [2020-12-22 07:11:32,449 INFO L226 Difference]: Without dead ends: 4646 [2020-12-22 07:11:32,455 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 07:11:32,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4646 states. [2020-12-22 07:11:32,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4646 to 3255. [2020-12-22 07:11:32,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3255 states. [2020-12-22 07:11:32,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3255 states to 3255 states and 4731 transitions. [2020-12-22 07:11:32,753 INFO L78 Accepts]: Start accepts. Automaton has 3255 states and 4731 transitions. Word has length 160 [2020-12-22 07:11:32,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:32,753 INFO L481 AbstractCegarLoop]: Abstraction has 3255 states and 4731 transitions. [2020-12-22 07:11:32,753 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:11:32,753 INFO L276 IsEmpty]: Start isEmpty. Operand 3255 states and 4731 transitions. [2020-12-22 07:11:32,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-12-22 07:11:32,754 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:32,754 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:11:32,755 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 07:11:32,755 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:32,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:32,755 INFO L82 PathProgramCache]: Analyzing trace with hash -1613623815, now seen corresponding path program 1 times [2020-12-22 07:11:32,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:32,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44317398] [2020-12-22 07:11:32,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:32,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:32,812 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 07:11:32,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44317398] [2020-12-22 07:11:32,813 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:32,813 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:11:32,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962597392] [2020-12-22 07:11:32,814 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:11:32,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:32,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:11:32,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:11:32,815 INFO L87 Difference]: Start difference. First operand 3255 states and 4731 transitions. Second operand 4 states. [2020-12-22 07:11:33,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:33,298 INFO L93 Difference]: Finished difference Result 7861 states and 11419 transitions. [2020-12-22 07:11:33,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:11:33,300 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 160 [2020-12-22 07:11:33,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:33,305 INFO L225 Difference]: With dead ends: 7861 [2020-12-22 07:11:33,305 INFO L226 Difference]: Without dead ends: 4645 [2020-12-22 07:11:33,310 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 07:11:33,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4645 states. [2020-12-22 07:11:33,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4645 to 3255. [2020-12-22 07:11:33,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3255 states. [2020-12-22 07:11:33,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3255 states to 3255 states and 4728 transitions. [2020-12-22 07:11:33,581 INFO L78 Accepts]: Start accepts. Automaton has 3255 states and 4728 transitions. Word has length 160 [2020-12-22 07:11:33,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:33,581 INFO L481 AbstractCegarLoop]: Abstraction has 3255 states and 4728 transitions. [2020-12-22 07:11:33,581 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:11:33,581 INFO L276 IsEmpty]: Start isEmpty. Operand 3255 states and 4728 transitions. [2020-12-22 07:11:33,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-12-22 07:11:33,583 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:33,583 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:11:33,583 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 07:11:33,584 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:33,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:33,585 INFO L82 PathProgramCache]: Analyzing trace with hash 630934583, now seen corresponding path program 1 times [2020-12-22 07:11:33,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:33,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439205134] [2020-12-22 07:11:33,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:33,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:33,694 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 07:11:33,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439205134] [2020-12-22 07:11:33,695 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:33,695 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:11:33,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992428492] [2020-12-22 07:11:33,698 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:11:33,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:33,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:11:33,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:11:33,699 INFO L87 Difference]: Start difference. First operand 3255 states and 4728 transitions. Second operand 4 states. [2020-12-22 07:11:34,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:34,205 INFO L93 Difference]: Finished difference Result 7859 states and 11409 transitions. [2020-12-22 07:11:34,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:11:34,206 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 160 [2020-12-22 07:11:34,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:34,212 INFO L225 Difference]: With dead ends: 7859 [2020-12-22 07:11:34,212 INFO L226 Difference]: Without dead ends: 4644 [2020-12-22 07:11:34,216 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 07:11:34,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4644 states. [2020-12-22 07:11:34,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4644 to 3255. [2020-12-22 07:11:34,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3255 states. [2020-12-22 07:11:34,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3255 states to 3255 states and 4725 transitions. [2020-12-22 07:11:34,491 INFO L78 Accepts]: Start accepts. Automaton has 3255 states and 4725 transitions. Word has length 160 [2020-12-22 07:11:34,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:34,491 INFO L481 AbstractCegarLoop]: Abstraction has 3255 states and 4725 transitions. [2020-12-22 07:11:34,491 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:11:34,491 INFO L276 IsEmpty]: Start isEmpty. Operand 3255 states and 4725 transitions. [2020-12-22 07:11:34,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-12-22 07:11:34,493 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:34,493 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:11:34,493 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 07:11:34,493 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:34,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:34,494 INFO L82 PathProgramCache]: Analyzing trace with hash 1118981689, now seen corresponding path program 1 times [2020-12-22 07:11:34,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:34,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799230379] [2020-12-22 07:11:34,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:34,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:34,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:11:34,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799230379] [2020-12-22 07:11:34,553 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:34,553 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:11:34,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614721244] [2020-12-22 07:11:34,554 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:11:34,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:34,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:11:34,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:11:34,555 INFO L87 Difference]: Start difference. First operand 3255 states and 4725 transitions. Second operand 4 states. [2020-12-22 07:11:35,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:35,014 INFO L93 Difference]: Finished difference Result 7857 states and 11399 transitions. [2020-12-22 07:11:35,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:11:35,015 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 160 [2020-12-22 07:11:35,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:35,019 INFO L225 Difference]: With dead ends: 7857 [2020-12-22 07:11:35,019 INFO L226 Difference]: Without dead ends: 4643 [2020-12-22 07:11:35,021 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 07:11:35,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4643 states. [2020-12-22 07:11:35,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4643 to 3255. [2020-12-22 07:11:35,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3255 states. [2020-12-22 07:11:35,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3255 states to 3255 states and 4722 transitions. [2020-12-22 07:11:35,214 INFO L78 Accepts]: Start accepts. Automaton has 3255 states and 4722 transitions. Word has length 160 [2020-12-22 07:11:35,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:35,214 INFO L481 AbstractCegarLoop]: Abstraction has 3255 states and 4722 transitions. [2020-12-22 07:11:35,214 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:11:35,215 INFO L276 IsEmpty]: Start isEmpty. Operand 3255 states and 4722 transitions. [2020-12-22 07:11:35,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-12-22 07:11:35,216 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:35,216 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:11:35,216 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-12-22 07:11:35,216 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:35,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:35,217 INFO L82 PathProgramCache]: Analyzing trace with hash 26346487, now seen corresponding path program 1 times [2020-12-22 07:11:35,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:35,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959644773] [2020-12-22 07:11:35,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:35,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:35,270 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 07:11:35,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959644773] [2020-12-22 07:11:35,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:35,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:11:35,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473565540] [2020-12-22 07:11:35,272 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:11:35,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:35,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:11:35,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:11:35,273 INFO L87 Difference]: Start difference. First operand 3255 states and 4722 transitions. Second operand 3 states. [2020-12-22 07:11:35,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:35,568 INFO L93 Difference]: Finished difference Result 6468 states and 9387 transitions. [2020-12-22 07:11:35,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:11:35,568 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 160 [2020-12-22 07:11:35,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:35,571 INFO L225 Difference]: With dead ends: 6468 [2020-12-22 07:11:35,571 INFO L226 Difference]: Without dead ends: 3255 [2020-12-22 07:11:35,574 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 07:11:35,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3255 states. [2020-12-22 07:11:35,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3255 to 3255. [2020-12-22 07:11:35,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3255 states. [2020-12-22 07:11:35,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3255 states to 3255 states and 4686 transitions. [2020-12-22 07:11:35,803 INFO L78 Accepts]: Start accepts. Automaton has 3255 states and 4686 transitions. Word has length 160 [2020-12-22 07:11:35,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:35,803 INFO L481 AbstractCegarLoop]: Abstraction has 3255 states and 4686 transitions. [2020-12-22 07:11:35,803 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:11:35,803 INFO L276 IsEmpty]: Start isEmpty. Operand 3255 states and 4686 transitions. [2020-12-22 07:11:35,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-12-22 07:11:35,804 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:35,804 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:11:35,805 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-12-22 07:11:35,805 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:35,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:35,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1759277819, now seen corresponding path program 1 times [2020-12-22 07:11:35,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:35,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254102157] [2020-12-22 07:11:35,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:35,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:35,882 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 07:11:35,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254102157] [2020-12-22 07:11:35,882 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:35,883 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:11:35,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255403123] [2020-12-22 07:11:35,883 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:11:35,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:35,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:11:35,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:11:35,885 INFO L87 Difference]: Start difference. First operand 3255 states and 4686 transitions. Second operand 3 states. [2020-12-22 07:11:36,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:36,320 INFO L93 Difference]: Finished difference Result 9526 states and 13699 transitions. [2020-12-22 07:11:36,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:11:36,321 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 160 [2020-12-22 07:11:36,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:36,327 INFO L225 Difference]: With dead ends: 9526 [2020-12-22 07:11:36,327 INFO L226 Difference]: Without dead ends: 6315 [2020-12-22 07:11:36,331 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 07:11:36,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6315 states. [2020-12-22 07:11:36,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6315 to 6137. [2020-12-22 07:11:36,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6137 states. [2020-12-22 07:11:36,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6137 states to 6137 states and 8792 transitions. [2020-12-22 07:11:36,767 INFO L78 Accepts]: Start accepts. Automaton has 6137 states and 8792 transitions. Word has length 160 [2020-12-22 07:11:36,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:36,767 INFO L481 AbstractCegarLoop]: Abstraction has 6137 states and 8792 transitions. [2020-12-22 07:11:36,767 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:11:36,767 INFO L276 IsEmpty]: Start isEmpty. Operand 6137 states and 8792 transitions. [2020-12-22 07:11:36,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2020-12-22 07:11:36,772 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:36,773 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:11:36,773 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-12-22 07:11:36,773 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:36,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:36,774 INFO L82 PathProgramCache]: Analyzing trace with hash -837601248, now seen corresponding path program 1 times [2020-12-22 07:11:36,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:36,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646758501] [2020-12-22 07:11:36,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:36,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:36,875 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 07:11:36,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646758501] [2020-12-22 07:11:36,875 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:36,875 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:11:36,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097502193] [2020-12-22 07:11:36,876 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:11:36,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:36,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:11:36,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:11:36,877 INFO L87 Difference]: Start difference. First operand 6137 states and 8792 transitions. Second operand 5 states. [2020-12-22 07:11:38,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:38,295 INFO L93 Difference]: Finished difference Result 18165 states and 26033 transitions. [2020-12-22 07:11:38,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:11:38,295 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 261 [2020-12-22 07:11:38,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:38,306 INFO L225 Difference]: With dead ends: 18165 [2020-12-22 07:11:38,306 INFO L226 Difference]: Without dead ends: 12076 [2020-12-22 07:11:38,315 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 07:11:38,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12076 states. [2020-12-22 07:11:38,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12076 to 6224. [2020-12-22 07:11:38,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6224 states. [2020-12-22 07:11:38,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6224 states to 6224 states and 8851 transitions. [2020-12-22 07:11:38,869 INFO L78 Accepts]: Start accepts. Automaton has 6224 states and 8851 transitions. Word has length 261 [2020-12-22 07:11:38,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:38,869 INFO L481 AbstractCegarLoop]: Abstraction has 6224 states and 8851 transitions. [2020-12-22 07:11:38,869 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:11:38,869 INFO L276 IsEmpty]: Start isEmpty. Operand 6224 states and 8851 transitions. [2020-12-22 07:11:38,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2020-12-22 07:11:38,874 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:38,874 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:11:38,874 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-12-22 07:11:38,875 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:38,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:38,875 INFO L82 PathProgramCache]: Analyzing trace with hash 581072284, now seen corresponding path program 1 times [2020-12-22 07:11:38,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:38,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51786403] [2020-12-22 07:11:38,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:38,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:38,972 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 07:11:38,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51786403] [2020-12-22 07:11:38,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:38,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:11:38,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895404018] [2020-12-22 07:11:38,974 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:11:38,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:38,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:11:38,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:11:38,975 INFO L87 Difference]: Start difference. First operand 6224 states and 8851 transitions. Second operand 5 states. [2020-12-22 07:11:40,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:40,604 INFO L93 Difference]: Finished difference Result 23776 states and 33867 transitions. [2020-12-22 07:11:40,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:11:40,605 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 261 [2020-12-22 07:11:40,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:40,621 INFO L225 Difference]: With dead ends: 23776 [2020-12-22 07:11:40,621 INFO L226 Difference]: Without dead ends: 17607 [2020-12-22 07:11:40,627 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 07:11:40,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17607 states. [2020-12-22 07:11:41,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17607 to 6395. [2020-12-22 07:11:41,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6395 states. [2020-12-22 07:11:41,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6395 states to 6395 states and 9022 transitions. [2020-12-22 07:11:41,153 INFO L78 Accepts]: Start accepts. Automaton has 6395 states and 9022 transitions. Word has length 261 [2020-12-22 07:11:41,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:41,153 INFO L481 AbstractCegarLoop]: Abstraction has 6395 states and 9022 transitions. [2020-12-22 07:11:41,154 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:11:41,154 INFO L276 IsEmpty]: Start isEmpty. Operand 6395 states and 9022 transitions. [2020-12-22 07:11:41,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2020-12-22 07:11:41,158 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:41,159 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:11:41,159 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-12-22 07:11:41,159 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:41,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:41,160 INFO L82 PathProgramCache]: Analyzing trace with hash -292593318, now seen corresponding path program 1 times [2020-12-22 07:11:41,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:41,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605170504] [2020-12-22 07:11:41,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:41,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:41,251 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 07:11:41,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605170504] [2020-12-22 07:11:41,252 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:41,252 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:11:41,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577829423] [2020-12-22 07:11:41,252 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:11:41,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:41,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:11:41,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:11:41,253 INFO L87 Difference]: Start difference. First operand 6395 states and 9022 transitions. Second operand 5 states. [2020-12-22 07:11:42,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:42,200 INFO L93 Difference]: Finished difference Result 15383 states and 21650 transitions. [2020-12-22 07:11:42,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:11:42,201 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 261 [2020-12-22 07:11:42,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:42,211 INFO L225 Difference]: With dead ends: 15383 [2020-12-22 07:11:42,211 INFO L226 Difference]: Without dead ends: 9053 [2020-12-22 07:11:42,218 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 07:11:42,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9053 states. [2020-12-22 07:11:42,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9053 to 6407. [2020-12-22 07:11:42,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6407 states. [2020-12-22 07:11:42,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6407 states to 6407 states and 8981 transitions. [2020-12-22 07:11:42,963 INFO L78 Accepts]: Start accepts. Automaton has 6407 states and 8981 transitions. Word has length 261 [2020-12-22 07:11:42,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:42,963 INFO L481 AbstractCegarLoop]: Abstraction has 6407 states and 8981 transitions. [2020-12-22 07:11:42,963 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:11:42,963 INFO L276 IsEmpty]: Start isEmpty. Operand 6407 states and 8981 transitions. [2020-12-22 07:11:42,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2020-12-22 07:11:42,968 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:42,969 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:11:42,969 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-12-22 07:11:42,969 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:42,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:42,970 INFO L82 PathProgramCache]: Analyzing trace with hash 1171388630, now seen corresponding path program 1 times [2020-12-22 07:11:42,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:42,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110690791] [2020-12-22 07:11:42,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:42,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:43,090 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 07:11:43,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110690791] [2020-12-22 07:11:43,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:43,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:11:43,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428644269] [2020-12-22 07:11:43,091 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:11:43,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:43,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:11:43,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:11:43,092 INFO L87 Difference]: Start difference. First operand 6407 states and 8981 transitions. Second operand 5 states. [2020-12-22 07:11:44,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:44,784 INFO L93 Difference]: Finished difference Result 23493 states and 33128 transitions. [2020-12-22 07:11:44,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:11:44,784 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 261 [2020-12-22 07:11:44,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:44,799 INFO L225 Difference]: With dead ends: 23493 [2020-12-22 07:11:44,799 INFO L226 Difference]: Without dead ends: 17158 [2020-12-22 07:11:44,806 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 07:11:44,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17158 states. [2020-12-22 07:11:45,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17158 to 6578. [2020-12-22 07:11:45,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6578 states. [2020-12-22 07:11:45,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6578 states to 6578 states and 9152 transitions. [2020-12-22 07:11:45,536 INFO L78 Accepts]: Start accepts. Automaton has 6578 states and 9152 transitions. Word has length 261 [2020-12-22 07:11:45,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:45,537 INFO L481 AbstractCegarLoop]: Abstraction has 6578 states and 9152 transitions. [2020-12-22 07:11:45,537 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:11:45,537 INFO L276 IsEmpty]: Start isEmpty. Operand 6578 states and 9152 transitions. [2020-12-22 07:11:45,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2020-12-22 07:11:45,540 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:45,540 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:11:45,541 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-12-22 07:11:45,541 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:45,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:45,541 INFO L82 PathProgramCache]: Analyzing trace with hash -823914092, now seen corresponding path program 1 times [2020-12-22 07:11:45,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:45,542 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823289187] [2020-12-22 07:11:45,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:45,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:45,645 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 [823289187] [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 [3] imperfect sequences [] total 3 [2020-12-22 07:11:45,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966424677] [2020-12-22 07:11:45,646 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:11:45,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:45,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:11:45,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:11:45,647 INFO L87 Difference]: Start difference. First operand 6578 states and 9152 transitions. Second operand 4 states. [2020-12-22 07:11:47,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:47,273 INFO L93 Difference]: Finished difference Result 22308 states and 30992 transitions. [2020-12-22 07:11:47,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:11:47,274 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 261 [2020-12-22 07:11:47,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:47,291 INFO L225 Difference]: With dead ends: 22308 [2020-12-22 07:11:47,291 INFO L226 Difference]: Without dead ends: 15807 [2020-12-22 07:11:47,299 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 07:11:47,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15807 states. [2020-12-22 07:11:48,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15807 to 12533. [2020-12-22 07:11:48,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12533 states. [2020-12-22 07:11:48,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12533 states to 12533 states and 17366 transitions. [2020-12-22 07:11:48,688 INFO L78 Accepts]: Start accepts. Automaton has 12533 states and 17366 transitions. Word has length 261 [2020-12-22 07:11:48,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:48,688 INFO L481 AbstractCegarLoop]: Abstraction has 12533 states and 17366 transitions. [2020-12-22 07:11:48,688 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:11:48,688 INFO L276 IsEmpty]: Start isEmpty. Operand 12533 states and 17366 transitions. [2020-12-22 07:11:48,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2020-12-22 07:11:48,693 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:48,693 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:11:48,694 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-12-22 07:11:48,694 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:48,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:48,694 INFO L82 PathProgramCache]: Analyzing trace with hash 2137054418, now seen corresponding path program 1 times [2020-12-22 07:11:48,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:48,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929300083] [2020-12-22 07:11:48,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:48,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:48,786 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 07:11:48,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929300083] [2020-12-22 07:11:48,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:48,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:11:48,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108270990] [2020-12-22 07:11:48,787 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:11:48,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:48,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:11:48,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:11:48,788 INFO L87 Difference]: Start difference. First operand 12533 states and 17366 transitions. Second operand 5 states. [2020-12-22 07:11:51,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:51,209 INFO L93 Difference]: Finished difference Result 35331 states and 49220 transitions. [2020-12-22 07:11:51,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:11:51,210 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 261 [2020-12-22 07:11:51,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:51,227 INFO L225 Difference]: With dead ends: 35331 [2020-12-22 07:11:51,228 INFO L226 Difference]: Without dead ends: 22879 [2020-12-22 07:11:51,239 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 07:11:51,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22879 states. [2020-12-22 07:11:52,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22879 to 12701. [2020-12-22 07:11:52,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12701 states. [2020-12-22 07:11:52,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12701 states to 12701 states and 17481 transitions. [2020-12-22 07:11:52,612 INFO L78 Accepts]: Start accepts. Automaton has 12701 states and 17481 transitions. Word has length 261 [2020-12-22 07:11:52,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:52,612 INFO L481 AbstractCegarLoop]: Abstraction has 12701 states and 17481 transitions. [2020-12-22 07:11:52,612 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:11:52,613 INFO L276 IsEmpty]: Start isEmpty. Operand 12701 states and 17481 transitions. [2020-12-22 07:11:52,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2020-12-22 07:11:52,618 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:52,618 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:11:52,619 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-12-22 07:11:52,619 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:52,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:52,619 INFO L82 PathProgramCache]: Analyzing trace with hash -1743925682, now seen corresponding path program 1 times [2020-12-22 07:11:52,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:52,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758208053] [2020-12-22 07:11:52,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:52,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:52,722 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 07:11:52,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758208053] [2020-12-22 07:11:52,722 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:52,722 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:11:52,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384435032] [2020-12-22 07:11:52,723 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:11:52,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:52,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:11:52,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:11:52,724 INFO L87 Difference]: Start difference. First operand 12701 states and 17481 transitions. Second operand 4 states. [2020-12-22 07:11:56,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:56,273 INFO L93 Difference]: Finished difference Result 43288 states and 59497 transitions. [2020-12-22 07:11:56,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:11:56,274 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 261 [2020-12-22 07:11:56,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:56,304 INFO L225 Difference]: With dead ends: 43288 [2020-12-22 07:11:56,305 INFO L226 Difference]: Without dead ends: 30670 [2020-12-22 07:11:56,316 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 07:11:56,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30670 states. [2020-12-22 07:11:58,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30670 to 24320. [2020-12-22 07:11:58,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24320 states. [2020-12-22 07:11:58,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24320 states to 24320 states and 33342 transitions. [2020-12-22 07:11:58,818 INFO L78 Accepts]: Start accepts. Automaton has 24320 states and 33342 transitions. Word has length 261 [2020-12-22 07:11:58,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:58,819 INFO L481 AbstractCegarLoop]: Abstraction has 24320 states and 33342 transitions. [2020-12-22 07:11:58,819 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:11:58,819 INFO L276 IsEmpty]: Start isEmpty. Operand 24320 states and 33342 transitions. [2020-12-22 07:11:58,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2020-12-22 07:11:58,829 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:58,830 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:11:58,830 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-12-22 07:11:58,830 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:58,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:58,830 INFO L82 PathProgramCache]: Analyzing trace with hash -2000012691, now seen corresponding path program 1 times [2020-12-22 07:11:58,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:58,831 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22040999] [2020-12-22 07:11:58,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:58,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:58,952 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 07:11:58,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22040999] [2020-12-22 07:11:58,953 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:58,953 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:11:58,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146918251] [2020-12-22 07:11:58,954 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:11:58,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:58,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:11:58,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:11:58,955 INFO L87 Difference]: Start difference. First operand 24320 states and 33342 transitions. Second operand 5 states. [2020-12-22 07:12:03,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:12:03,776 INFO L93 Difference]: Finished difference Result 67969 states and 93773 transitions. [2020-12-22 07:12:03,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:12:03,777 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 261 [2020-12-22 07:12:03,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:12:03,820 INFO L225 Difference]: With dead ends: 67969 [2020-12-22 07:12:03,820 INFO L226 Difference]: Without dead ends: 43736 [2020-12-22 07:12:03,845 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 07:12:04,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43736 states. [2020-12-22 07:12:07,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43736 to 24644. [2020-12-22 07:12:07,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24644 states. [2020-12-22 07:12:07,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24644 states to 24644 states and 33565 transitions. [2020-12-22 07:12:07,243 INFO L78 Accepts]: Start accepts. Automaton has 24644 states and 33565 transitions. Word has length 261 [2020-12-22 07:12:07,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:12:07,243 INFO L481 AbstractCegarLoop]: Abstraction has 24644 states and 33565 transitions. [2020-12-22 07:12:07,243 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:12:07,243 INFO L276 IsEmpty]: Start isEmpty. Operand 24644 states and 33565 transitions. [2020-12-22 07:12:07,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2020-12-22 07:12:07,254 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:12:07,254 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:12:07,254 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-12-22 07:12:07,255 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:12:07,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:12:07,255 INFO L82 PathProgramCache]: Analyzing trace with hash 477690089, now seen corresponding path program 1 times [2020-12-22 07:12:07,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:12:07,255 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565146976] [2020-12-22 07:12:07,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:12:07,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:12:07,423 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 07:12:07,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565146976] [2020-12-22 07:12:07,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:12:07,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:12:07,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565830973] [2020-12-22 07:12:07,424 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:12:07,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:12:07,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:12:07,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:12:07,425 INFO L87 Difference]: Start difference. First operand 24644 states and 33565 transitions. Second operand 4 states. [2020-12-22 07:12:14,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:12:14,474 INFO L93 Difference]: Finished difference Result 84017 states and 114272 transitions. [2020-12-22 07:12:14,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:12:14,474 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 261 [2020-12-22 07:12:14,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:12:14,535 INFO L225 Difference]: With dead ends: 84017 [2020-12-22 07:12:14,535 INFO L226 Difference]: Without dead ends: 59469 [2020-12-22 07:12:14,557 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 07:12:14,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59469 states. [2020-12-22 07:12:20,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59469 to 47283. [2020-12-22 07:12:20,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47283 states. [2020-12-22 07:12:20,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47283 states to 47283 states and 64158 transitions. [2020-12-22 07:12:20,564 INFO L78 Accepts]: Start accepts. Automaton has 47283 states and 64158 transitions. Word has length 261 [2020-12-22 07:12:20,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:12:20,565 INFO L481 AbstractCegarLoop]: Abstraction has 47283 states and 64158 transitions. [2020-12-22 07:12:20,565 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:12:20,565 INFO L276 IsEmpty]: Start isEmpty. Operand 47283 states and 64158 transitions. [2020-12-22 07:12:20,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2020-12-22 07:12:20,580 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:12:20,581 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:12:20,581 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-12-22 07:12:20,581 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:12:20,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:12:20,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1638442104, now seen corresponding path program 1 times [2020-12-22 07:12:20,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:12:20,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69358976] [2020-12-22 07:12:20,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:12:20,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:12:20,682 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 07:12:20,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69358976] [2020-12-22 07:12:20,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:12:20,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:12:20,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649158204] [2020-12-22 07:12:20,683 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:12:20,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:12:20,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:12:20,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:12:20,684 INFO L87 Difference]: Start difference. First operand 47283 states and 64158 transitions. Second operand 5 states. [2020-12-22 07:12:30,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:12:30,493 INFO L93 Difference]: Finished difference Result 129390 states and 176709 transitions. [2020-12-22 07:12:30,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:12:30,493 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 261 [2020-12-22 07:12:30,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:12:30,571 INFO L225 Difference]: With dead ends: 129390 [2020-12-22 07:12:30,571 INFO L226 Difference]: Without dead ends: 82207 [2020-12-22 07:12:30,610 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 07:12:30,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82207 states. [2020-12-22 07:12:36,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82207 to 47907. [2020-12-22 07:12:36,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47907 states. [2020-12-22 07:12:36,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47907 states to 47907 states and 64589 transitions. [2020-12-22 07:12:36,983 INFO L78 Accepts]: Start accepts. Automaton has 47907 states and 64589 transitions. Word has length 261 [2020-12-22 07:12:36,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:12:36,984 INFO L481 AbstractCegarLoop]: Abstraction has 47907 states and 64589 transitions. [2020-12-22 07:12:36,984 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:12:36,984 INFO L276 IsEmpty]: Start isEmpty. Operand 47907 states and 64589 transitions. [2020-12-22 07:12:37,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2020-12-22 07:12:37,000 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:12:37,000 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:12:37,001 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-12-22 07:12:37,001 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:12:37,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:12:37,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1328739332, now seen corresponding path program 1 times [2020-12-22 07:12:37,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:12:37,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294457243] [2020-12-22 07:12:37,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:12:37,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:12:37,099 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 07:12:37,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294457243] [2020-12-22 07:12:37,100 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:12:37,100 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:12:37,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930565040] [2020-12-22 07:12:37,101 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:12:37,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:12:37,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:12:37,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:12:37,102 INFO L87 Difference]: Start difference. First operand 47907 states and 64589 transitions. Second operand 5 states. [2020-12-22 07:12:50,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:12:50,980 INFO L93 Difference]: Finished difference Result 161070 states and 219158 transitions. [2020-12-22 07:12:50,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:12:50,982 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 261 [2020-12-22 07:12:50,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:12:51,104 INFO L225 Difference]: With dead ends: 161070 [2020-12-22 07:12:51,104 INFO L226 Difference]: Without dead ends: 113270 [2020-12-22 07:12:51,144 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 07:12:51,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113270 states. [2020-12-22 07:12:57,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113270 to 49110. [2020-12-22 07:12:57,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49110 states. [2020-12-22 07:12:57,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49110 states to 49110 states and 65792 transitions. [2020-12-22 07:12:57,981 INFO L78 Accepts]: Start accepts. Automaton has 49110 states and 65792 transitions. Word has length 261 [2020-12-22 07:12:57,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:12:57,981 INFO L481 AbstractCegarLoop]: Abstraction has 49110 states and 65792 transitions. [2020-12-22 07:12:57,981 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:12:57,982 INFO L276 IsEmpty]: Start isEmpty. Operand 49110 states and 65792 transitions. [2020-12-22 07:12:57,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2020-12-22 07:12:57,997 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:12:57,997 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:12:57,997 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-12-22 07:12:57,997 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:12:57,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:12:57,998 INFO L82 PathProgramCache]: Analyzing trace with hash 1837518146, now seen corresponding path program 1 times [2020-12-22 07:12:57,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:12:57,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584377089] [2020-12-22 07:12:57,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:12:58,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:12:58,273 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 07:12:58,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584377089] [2020-12-22 07:12:58,273 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:12:58,273 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:12:58,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677039794] [2020-12-22 07:12:58,276 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:12:58,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:12:58,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:12:58,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:12:58,278 INFO L87 Difference]: Start difference. First operand 49110 states and 65792 transitions. Second operand 4 states. [2020-12-22 07:13:14,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:13:14,016 INFO L93 Difference]: Finished difference Result 167165 states and 223639 transitions. [2020-12-22 07:13:14,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:13:14,016 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 261 [2020-12-22 07:13:14,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:13:14,136 INFO L225 Difference]: With dead ends: 167165 [2020-12-22 07:13:14,137 INFO L226 Difference]: Without dead ends: 118167 [2020-12-22 07:13:14,181 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 07:13:14,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118167 states. [2020-12-22 07:13:27,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118167 to 94261. [2020-12-22 07:13:27,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94261 states. [2020-12-22 07:13:27,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94261 states to 94261 states and 125837 transitions. [2020-12-22 07:13:27,353 INFO L78 Accepts]: Start accepts. Automaton has 94261 states and 125837 transitions. Word has length 261 [2020-12-22 07:13:27,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:13:27,353 INFO L481 AbstractCegarLoop]: Abstraction has 94261 states and 125837 transitions. [2020-12-22 07:13:27,353 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:13:27,353 INFO L276 IsEmpty]: Start isEmpty. Operand 94261 states and 125837 transitions. [2020-12-22 07:13:27,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2020-12-22 07:13:27,383 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:13:27,383 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:13:27,384 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-12-22 07:13:27,384 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:13:27,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:13:27,384 INFO L82 PathProgramCache]: Analyzing trace with hash -1270105856, now seen corresponding path program 1 times [2020-12-22 07:13:27,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:13:27,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973978239] [2020-12-22 07:13:27,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:13:27,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:13:27,485 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 07:13:27,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973978239] [2020-12-22 07:13:27,485 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:13:27,485 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:13:27,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918780933] [2020-12-22 07:13:27,486 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:13:27,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:13:27,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:13:27,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:13:27,487 INFO L87 Difference]: Start difference. First operand 94261 states and 125837 transitions. Second operand 5 states. [2020-12-22 07:13:48,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:13:48,859 INFO L93 Difference]: Finished difference Result 252058 states and 338668 transitions. [2020-12-22 07:13:48,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:13:48,859 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 261 [2020-12-22 07:13:48,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:13:49,220 INFO L225 Difference]: With dead ends: 252058 [2020-12-22 07:13:49,221 INFO L226 Difference]: Without dead ends: 157913 [2020-12-22 07:13:49,286 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 07:13:49,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157913 states. [2020-12-22 07:14:03,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157913 to 95461. [2020-12-22 07:14:03,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95461 states. [2020-12-22 07:14:03,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95461 states to 95461 states and 126668 transitions. [2020-12-22 07:14:03,882 INFO L78 Accepts]: Start accepts. Automaton has 95461 states and 126668 transitions. Word has length 261 [2020-12-22 07:14:03,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:14:03,882 INFO L481 AbstractCegarLoop]: Abstraction has 95461 states and 126668 transitions. [2020-12-22 07:14:03,882 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:14:03,883 INFO L276 IsEmpty]: Start isEmpty. Operand 95461 states and 126668 transitions. [2020-12-22 07:14:03,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2020-12-22 07:14:03,913 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:14:03,914 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:14:03,914 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-12-22 07:14:03,914 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:14:03,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:14:03,915 INFO L82 PathProgramCache]: Analyzing trace with hash 189475708, now seen corresponding path program 1 times [2020-12-22 07:14:03,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:14:03,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329370925] [2020-12-22 07:14:03,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:14:03,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:14:04,007 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 07:14:04,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329370925] [2020-12-22 07:14:04,007 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:14:04,007 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:14:04,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195378102] [2020-12-22 07:14:04,008 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:14:04,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:14:04,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:14:04,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:14:04,009 INFO L87 Difference]: Start difference. First operand 95461 states and 126668 transitions. Second operand 5 states. [2020-12-22 07:14:33,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:14:33,849 INFO L93 Difference]: Finished difference Result 309510 states and 414297 transitions. [2020-12-22 07:14:33,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:14:33,850 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 261 [2020-12-22 07:14:33,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:14:34,329 INFO L225 Difference]: With dead ends: 309510 [2020-12-22 07:14:34,329 INFO L226 Difference]: Without dead ends: 214172 [2020-12-22 07:14:34,432 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 07:14:34,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214172 states.