/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 08:21:49,316 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 08:21:49,319 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 08:21:49,372 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 08:21:49,373 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 08:21:49,375 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 08:21:49,376 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 08:21:49,379 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 08:21:49,381 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 08:21:49,382 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 08:21:49,383 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 08:21:49,385 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 08:21:49,385 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 08:21:49,386 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 08:21:49,388 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 08:21:49,389 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 08:21:49,390 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 08:21:49,391 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 08:21:49,393 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 08:21:49,395 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 08:21:49,397 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 08:21:49,399 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 08:21:49,400 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 08:21:49,402 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 08:21:49,405 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 08:21:49,410 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 08:21:49,411 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 08:21:49,412 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 08:21:49,413 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 08:21:49,414 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 08:21:49,414 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 08:21:49,415 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 08:21:49,416 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 08:21:49,416 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 08:21:49,418 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 08:21:49,422 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 08:21:49,423 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 08:21:49,470 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 08:21:49,471 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 08:21:49,472 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 08:21:49,473 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 08:21:49,474 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 08:21:49,475 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 08:21:49,475 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 08:21:49,475 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 08:21:49,475 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 08:21:49,475 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 08:21:49,476 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 08:21:49,477 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 08:21:49,477 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 08:21:49,477 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 08:21:49,477 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 08:21:49,478 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 08:21:49,478 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 08:21:49,478 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 08:21:49,478 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 08:21:49,478 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 08:21:49,478 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 08:21:49,479 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 08:21:49,479 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 08:21:49,479 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 08:21:49,479 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 08:21:49,479 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 08:21:49,852 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 08:21:49,885 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 08:21:49,888 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 08:21:49,891 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 08:21:49,891 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 08:21:49,892 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-12-22 08:21:49,995 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/244599601/7b7697db77574b3882bb06ca0be62814/FLAG70563eef0 [2020-12-22 08:21:50,678 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 08:21:50,679 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-12-22 08:21:50,696 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/244599601/7b7697db77574b3882bb06ca0be62814/FLAG70563eef0 [2020-12-22 08:21:51,018 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/244599601/7b7697db77574b3882bb06ca0be62814 [2020-12-22 08:21:51,025 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 08:21:51,028 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 08:21:51,030 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 08:21:51,030 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 08:21:51,035 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 08:21:51,036 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:21:51" (1/1) ... [2020-12-22 08:21:51,037 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ff918a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:21:51, skipping insertion in model container [2020-12-22 08:21:51,037 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:21:51" (1/1) ... [2020-12-22 08:21:51,046 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 08:21:51,084 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 08:21:51,354 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[4973,4986] [2020-12-22 08:21:51,399 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:21:51,422 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 08:21:51,502 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[4973,4986] [2020-12-22 08:21:51,551 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:21:51,590 INFO L208 MainTranslator]: Completed translation [2020-12-22 08:21:51,591 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:21:51 WrapperNode [2020-12-22 08:21:51,591 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 08:21:51,594 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 08:21:51,594 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 08:21:51,594 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 08:21:51,603 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:21:51" (1/1) ... [2020-12-22 08:21:51,632 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:21:51" (1/1) ... [2020-12-22 08:21:51,681 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 08:21:51,682 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 08:21:51,682 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 08:21:51,682 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 08:21:51,693 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:21:51" (1/1) ... [2020-12-22 08:21:51,693 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:21:51" (1/1) ... [2020-12-22 08:21:51,697 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:21:51" (1/1) ... [2020-12-22 08:21:51,698 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:21:51" (1/1) ... [2020-12-22 08:21:51,716 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:21:51" (1/1) ... [2020-12-22 08:21:51,727 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:21:51" (1/1) ... [2020-12-22 08:21:51,735 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:21:51" (1/1) ... [2020-12-22 08:21:51,744 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 08:21:51,747 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 08:21:51,747 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 08:21:51,747 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 08:21:51,749 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:21:51" (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 08:21:51,860 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 08:21:51,861 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 08:21:51,861 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 08:21:51,861 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 08:21:52,918 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 08:21:52,919 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-22 08:21:52,921 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:21:52 BoogieIcfgContainer [2020-12-22 08:21:52,921 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 08:21:52,923 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 08:21:52,923 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 08:21:52,927 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 08:21:52,927 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 08:21:51" (1/3) ... [2020-12-22 08:21:52,928 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@585b4534 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:21:52, skipping insertion in model container [2020-12-22 08:21:52,928 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:21:51" (2/3) ... [2020-12-22 08:21:52,929 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@585b4534 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:21:52, skipping insertion in model container [2020-12-22 08:21:52,929 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:21:52" (3/3) ... [2020-12-22 08:21:52,930 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-12-22 08:21:52,937 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 08:21:52,943 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 08:21:52,963 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 08:21:52,996 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 08:21:52,996 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 08:21:52,996 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 08:21:52,996 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 08:21:52,997 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 08:21:52,997 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 08:21:52,997 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 08:21:52,997 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 08:21:53,016 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states. [2020-12-22 08:21:53,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-22 08:21:53,026 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:21:53,027 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] [2020-12-22 08:21:53,028 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:21:53,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:21:53,035 INFO L82 PathProgramCache]: Analyzing trace with hash 2117585175, now seen corresponding path program 1 times [2020-12-22 08:21:53,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:21:53,046 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569502268] [2020-12-22 08:21:53,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:21:53,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:21:53,419 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 08:21:53,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569502268] [2020-12-22 08:21:53,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:21:53,421 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:21:53,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100410051] [2020-12-22 08:21:53,427 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:21:53,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:21:53,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:21:53,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:21:53,445 INFO L87 Difference]: Start difference. First operand 112 states. Second operand 3 states. [2020-12-22 08:21:53,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:21:53,529 INFO L93 Difference]: Finished difference Result 266 states and 425 transitions. [2020-12-22 08:21:53,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:21:53,531 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 49 [2020-12-22 08:21:53,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:21:53,545 INFO L225 Difference]: With dead ends: 266 [2020-12-22 08:21:53,546 INFO L226 Difference]: Without dead ends: 175 [2020-12-22 08:21:53,549 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 08:21:53,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-12-22 08:21:53,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 173. [2020-12-22 08:21:53,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-12-22 08:21:53,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 259 transitions. [2020-12-22 08:21:53,639 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 259 transitions. Word has length 49 [2020-12-22 08:21:53,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:21:53,640 INFO L481 AbstractCegarLoop]: Abstraction has 173 states and 259 transitions. [2020-12-22 08:21:53,640 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:21:53,640 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 259 transitions. [2020-12-22 08:21:53,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-22 08:21:53,643 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:21:53,643 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] [2020-12-22 08:21:53,644 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 08:21:53,644 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:21:53,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:21:53,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1419109229, now seen corresponding path program 1 times [2020-12-22 08:21:53,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:21:53,646 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498004373] [2020-12-22 08:21:53,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:21:53,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:21:53,775 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 08:21:53,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498004373] [2020-12-22 08:21:53,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:21:53,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:21:53,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171255036] [2020-12-22 08:21:53,778 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:21:53,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:21:53,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:21:53,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:21:53,782 INFO L87 Difference]: Start difference. First operand 173 states and 259 transitions. Second operand 3 states. [2020-12-22 08:21:53,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:21:53,865 INFO L93 Difference]: Finished difference Result 433 states and 671 transitions. [2020-12-22 08:21:53,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:21:53,865 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 50 [2020-12-22 08:21:53,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:21:53,869 INFO L225 Difference]: With dead ends: 433 [2020-12-22 08:21:53,869 INFO L226 Difference]: Without dead ends: 287 [2020-12-22 08:21:53,871 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 08:21:53,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2020-12-22 08:21:53,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 285. [2020-12-22 08:21:53,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 285 states. [2020-12-22 08:21:53,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 436 transitions. [2020-12-22 08:21:53,911 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 436 transitions. Word has length 50 [2020-12-22 08:21:53,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:21:53,911 INFO L481 AbstractCegarLoop]: Abstraction has 285 states and 436 transitions. [2020-12-22 08:21:53,912 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:21:53,912 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 436 transitions. [2020-12-22 08:21:53,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-22 08:21:53,914 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:21:53,914 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] [2020-12-22 08:21:53,914 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 08:21:53,915 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:21:53,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:21:53,916 INFO L82 PathProgramCache]: Analyzing trace with hash 1570665396, now seen corresponding path program 1 times [2020-12-22 08:21:53,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:21:53,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310176348] [2020-12-22 08:21:53,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:21:53,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:21:54,088 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 08:21:54,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310176348] [2020-12-22 08:21:54,089 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:21:54,090 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:21:54,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49728094] [2020-12-22 08:21:54,091 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:21:54,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:21:54,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:21:54,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:21:54,092 INFO L87 Difference]: Start difference. First operand 285 states and 436 transitions. Second operand 3 states. [2020-12-22 08:21:54,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:21:54,146 INFO L93 Difference]: Finished difference Result 737 states and 1150 transitions. [2020-12-22 08:21:54,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:21:54,147 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 51 [2020-12-22 08:21:54,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:21:54,151 INFO L225 Difference]: With dead ends: 737 [2020-12-22 08:21:54,151 INFO L226 Difference]: Without dead ends: 479 [2020-12-22 08:21:54,153 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 08:21:54,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2020-12-22 08:21:54,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 477. [2020-12-22 08:21:54,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 477 states. [2020-12-22 08:21:54,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 736 transitions. [2020-12-22 08:21:54,203 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 736 transitions. Word has length 51 [2020-12-22 08:21:54,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:21:54,204 INFO L481 AbstractCegarLoop]: Abstraction has 477 states and 736 transitions. [2020-12-22 08:21:54,204 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:21:54,204 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 736 transitions. [2020-12-22 08:21:54,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 08:21:54,207 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:21:54,208 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] [2020-12-22 08:21:54,208 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 08:21:54,208 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:21:54,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:21:54,209 INFO L82 PathProgramCache]: Analyzing trace with hash 1205622842, now seen corresponding path program 1 times [2020-12-22 08:21:54,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:21:54,210 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069168696] [2020-12-22 08:21:54,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:21:54,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:21:54,406 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 08:21:54,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069168696] [2020-12-22 08:21:54,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:21:54,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:21:54,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120111592] [2020-12-22 08:21:54,408 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:21:54,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:21:54,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:21:54,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:21:54,410 INFO L87 Difference]: Start difference. First operand 477 states and 736 transitions. Second operand 6 states. [2020-12-22 08:21:54,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:21:54,619 INFO L93 Difference]: Finished difference Result 2033 states and 3172 transitions. [2020-12-22 08:21:54,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 08:21:54,619 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 52 [2020-12-22 08:21:54,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:21:54,630 INFO L225 Difference]: With dead ends: 2033 [2020-12-22 08:21:54,630 INFO L226 Difference]: Without dead ends: 1583 [2020-12-22 08:21:54,633 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:21:54,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1583 states. [2020-12-22 08:21:54,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1583 to 1577. [2020-12-22 08:21:54,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1577 states. [2020-12-22 08:21:54,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1577 states to 1577 states and 2452 transitions. [2020-12-22 08:21:54,750 INFO L78 Accepts]: Start accepts. Automaton has 1577 states and 2452 transitions. Word has length 52 [2020-12-22 08:21:54,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:21:54,750 INFO L481 AbstractCegarLoop]: Abstraction has 1577 states and 2452 transitions. [2020-12-22 08:21:54,750 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:21:54,750 INFO L276 IsEmpty]: Start isEmpty. Operand 1577 states and 2452 transitions. [2020-12-22 08:21:54,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-22 08:21:54,753 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:21:54,753 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] [2020-12-22 08:21:54,753 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 08:21:54,754 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:21:54,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:21:54,754 INFO L82 PathProgramCache]: Analyzing trace with hash 1744489678, now seen corresponding path program 1 times [2020-12-22 08:21:54,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:21:54,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734509546] [2020-12-22 08:21:54,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:21:54,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:21:54,858 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 08:21:54,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734509546] [2020-12-22 08:21:54,859 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:21:54,859 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:21:54,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892528110] [2020-12-22 08:21:54,860 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:21:54,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:21:54,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:21:54,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:21:54,861 INFO L87 Difference]: Start difference. First operand 1577 states and 2452 transitions. Second operand 3 states. [2020-12-22 08:21:55,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:21:55,048 INFO L93 Difference]: Finished difference Result 4141 states and 6438 transitions. [2020-12-22 08:21:55,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:21:55,049 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 53 [2020-12-22 08:21:55,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:21:55,063 INFO L225 Difference]: With dead ends: 4141 [2020-12-22 08:21:55,064 INFO L226 Difference]: Without dead ends: 2591 [2020-12-22 08:21:55,067 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 08:21:55,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2591 states. [2020-12-22 08:21:55,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2591 to 2589. [2020-12-22 08:21:55,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2589 states. [2020-12-22 08:21:55,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2589 states to 2589 states and 3980 transitions. [2020-12-22 08:21:55,255 INFO L78 Accepts]: Start accepts. Automaton has 2589 states and 3980 transitions. Word has length 53 [2020-12-22 08:21:55,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:21:55,255 INFO L481 AbstractCegarLoop]: Abstraction has 2589 states and 3980 transitions. [2020-12-22 08:21:55,256 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:21:55,256 INFO L276 IsEmpty]: Start isEmpty. Operand 2589 states and 3980 transitions. [2020-12-22 08:21:55,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 08:21:55,260 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:21:55,261 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] [2020-12-22 08:21:55,261 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 08:21:55,261 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:21:55,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:21:55,262 INFO L82 PathProgramCache]: Analyzing trace with hash -1689386392, now seen corresponding path program 1 times [2020-12-22 08:21:55,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:21:55,262 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704127100] [2020-12-22 08:21:55,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:21:55,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:21:55,425 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 08:21:55,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704127100] [2020-12-22 08:21:55,426 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:21:55,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:21:55,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960712179] [2020-12-22 08:21:55,427 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:21:55,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:21:55,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:21:55,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:21:55,430 INFO L87 Difference]: Start difference. First operand 2589 states and 3980 transitions. Second operand 6 states. [2020-12-22 08:21:56,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:21:56,168 INFO L93 Difference]: Finished difference Result 11799 states and 18193 transitions. [2020-12-22 08:21:56,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 08:21:56,169 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 54 [2020-12-22 08:21:56,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:21:56,220 INFO L225 Difference]: With dead ends: 11799 [2020-12-22 08:21:56,220 INFO L226 Difference]: Without dead ends: 9237 [2020-12-22 08:21:56,229 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 08:21:56,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9237 states. [2020-12-22 08:21:56,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9237 to 5149. [2020-12-22 08:21:56,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5149 states. [2020-12-22 08:21:56,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5149 states to 5149 states and 7804 transitions. [2020-12-22 08:21:56,767 INFO L78 Accepts]: Start accepts. Automaton has 5149 states and 7804 transitions. Word has length 54 [2020-12-22 08:21:56,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:21:56,767 INFO L481 AbstractCegarLoop]: Abstraction has 5149 states and 7804 transitions. [2020-12-22 08:21:56,767 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:21:56,768 INFO L276 IsEmpty]: Start isEmpty. Operand 5149 states and 7804 transitions. [2020-12-22 08:21:56,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 08:21:56,769 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:21:56,770 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] [2020-12-22 08:21:56,770 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 08:21:56,770 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:21:56,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:21:56,773 INFO L82 PathProgramCache]: Analyzing trace with hash -850826877, now seen corresponding path program 1 times [2020-12-22 08:21:56,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:21:56,777 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224787162] [2020-12-22 08:21:56,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:21:56,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:21:56,914 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 08:21:56,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224787162] [2020-12-22 08:21:56,915 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:21:56,915 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:21:56,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756170922] [2020-12-22 08:21:56,917 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:21:56,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:21:56,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:21:56,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:21:56,918 INFO L87 Difference]: Start difference. First operand 5149 states and 7804 transitions. Second operand 5 states. [2020-12-22 08:21:57,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:21:57,776 INFO L93 Difference]: Finished difference Result 10527 states and 15837 transitions. [2020-12-22 08:21:57,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 08:21:57,776 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 55 [2020-12-22 08:21:57,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:21:57,856 INFO L225 Difference]: With dead ends: 10527 [2020-12-22 08:21:57,857 INFO L226 Difference]: Without dead ends: 10525 [2020-12-22 08:21:57,862 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:21:57,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10525 states. [2020-12-22 08:21:58,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10525 to 5405. [2020-12-22 08:21:58,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5405 states. [2020-12-22 08:21:58,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5405 states to 5405 states and 8060 transitions. [2020-12-22 08:21:58,487 INFO L78 Accepts]: Start accepts. Automaton has 5405 states and 8060 transitions. Word has length 55 [2020-12-22 08:21:58,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:21:58,488 INFO L481 AbstractCegarLoop]: Abstraction has 5405 states and 8060 transitions. [2020-12-22 08:21:58,489 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:21:58,489 INFO L276 IsEmpty]: Start isEmpty. Operand 5405 states and 8060 transitions. [2020-12-22 08:21:58,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-22 08:21:58,490 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:21:58,491 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] [2020-12-22 08:21:58,491 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 08:21:58,491 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:21:58,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:21:58,492 INFO L82 PathProgramCache]: Analyzing trace with hash -595256360, now seen corresponding path program 1 times [2020-12-22 08:21:58,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:21:58,492 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583914939] [2020-12-22 08:21:58,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:21:58,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:21:58,568 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 08:21:58,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583914939] [2020-12-22 08:21:58,568 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:21:58,569 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:21:58,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555678038] [2020-12-22 08:21:58,569 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:21:58,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:21:58,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:21:58,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:21:58,571 INFO L87 Difference]: Start difference. First operand 5405 states and 8060 transitions. Second operand 3 states. [2020-12-22 08:21:59,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:21:59,407 INFO L93 Difference]: Finished difference Result 13259 states and 19788 transitions. [2020-12-22 08:21:59,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:21:59,407 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 56 [2020-12-22 08:21:59,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:21:59,427 INFO L225 Difference]: With dead ends: 13259 [2020-12-22 08:21:59,428 INFO L226 Difference]: Without dead ends: 7881 [2020-12-22 08:21:59,438 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 08:21:59,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7881 states. [2020-12-22 08:22:00,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7881 to 7823. [2020-12-22 08:22:00,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7823 states. [2020-12-22 08:22:00,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7823 states to 7823 states and 11586 transitions. [2020-12-22 08:22:00,263 INFO L78 Accepts]: Start accepts. Automaton has 7823 states and 11586 transitions. Word has length 56 [2020-12-22 08:22:00,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:22:00,264 INFO L481 AbstractCegarLoop]: Abstraction has 7823 states and 11586 transitions. [2020-12-22 08:22:00,264 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:22:00,266 INFO L276 IsEmpty]: Start isEmpty. Operand 7823 states and 11586 transitions. [2020-12-22 08:22:00,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 08:22:00,271 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:22:00,272 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 08:22:00,272 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 08:22:00,272 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:22:00,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:22:00,273 INFO L82 PathProgramCache]: Analyzing trace with hash -264442661, now seen corresponding path program 1 times [2020-12-22 08:22:00,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:22:00,274 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652246356] [2020-12-22 08:22:00,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:22:00,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:22:00,589 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:22:00,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652246356] [2020-12-22 08:22:00,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465103381] [2020-12-22 08:22:00,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 08:22:00,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:22:00,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 08:22:00,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 08:22:01,099 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 08:22:01,099 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 08:22:01,099 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4] total 12 [2020-12-22 08:22:01,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957055672] [2020-12-22 08:22:01,100 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 08:22:01,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:22:01,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 08:22:01,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-12-22 08:22:01,101 INFO L87 Difference]: Start difference. First operand 7823 states and 11586 transitions. Second operand 12 states. [2020-12-22 08:22:06,020 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 36 [2020-12-22 08:22:17,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:22:17,607 INFO L93 Difference]: Finished difference Result 112903 states and 164848 transitions. [2020-12-22 08:22:17,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2020-12-22 08:22:17,607 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 79 [2020-12-22 08:22:17,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:22:17,903 INFO L225 Difference]: With dead ends: 112903 [2020-12-22 08:22:17,904 INFO L226 Difference]: Without dead ends: 105109 [2020-12-22 08:22:18,126 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3778 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1653, Invalid=7853, Unknown=0, NotChecked=0, Total=9506 [2020-12-22 08:22:18,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105109 states. [2020-12-22 08:22:22,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105109 to 28707. [2020-12-22 08:22:22,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28707 states. [2020-12-22 08:22:22,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28707 states to 28707 states and 41326 transitions. [2020-12-22 08:22:22,582 INFO L78 Accepts]: Start accepts. Automaton has 28707 states and 41326 transitions. Word has length 79 [2020-12-22 08:22:22,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:22:22,582 INFO L481 AbstractCegarLoop]: Abstraction has 28707 states and 41326 transitions. [2020-12-22 08:22:22,582 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 08:22:22,583 INFO L276 IsEmpty]: Start isEmpty. Operand 28707 states and 41326 transitions. [2020-12-22 08:22:22,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 08:22:22,592 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:22:22,592 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] [2020-12-22 08:22:22,807 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-22 08:22:22,808 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:22:22,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:22:22,810 INFO L82 PathProgramCache]: Analyzing trace with hash 2142394861, now seen corresponding path program 1 times [2020-12-22 08:22:22,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:22:22,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553505191] [2020-12-22 08:22:22,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:22:22,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:22:22,870 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:22:22,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553505191] [2020-12-22 08:22:22,871 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:22:22,871 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:22:22,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304403404] [2020-12-22 08:22:22,872 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:22:22,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:22:22,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:22:22,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:22:22,873 INFO L87 Difference]: Start difference. First operand 28707 states and 41326 transitions. Second operand 3 states. [2020-12-22 08:22:26,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:22:26,828 INFO L93 Difference]: Finished difference Result 67304 states and 97202 transitions. [2020-12-22 08:22:26,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:22:26,829 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 79 [2020-12-22 08:22:26,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:22:26,918 INFO L225 Difference]: With dead ends: 67304 [2020-12-22 08:22:26,919 INFO L226 Difference]: Without dead ends: 44118 [2020-12-22 08:22:26,952 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 08:22:26,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44118 states. [2020-12-22 08:22:31,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44118 to 44116. [2020-12-22 08:22:31,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44116 states. [2020-12-22 08:22:31,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44116 states to 44116 states and 63104 transitions. [2020-12-22 08:22:31,234 INFO L78 Accepts]: Start accepts. Automaton has 44116 states and 63104 transitions. Word has length 79 [2020-12-22 08:22:31,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:22:31,234 INFO L481 AbstractCegarLoop]: Abstraction has 44116 states and 63104 transitions. [2020-12-22 08:22:31,234 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:22:31,234 INFO L276 IsEmpty]: Start isEmpty. Operand 44116 states and 63104 transitions. [2020-12-22 08:22:31,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 08:22:31,249 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:22:31,249 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:22:31,249 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 08:22:31,250 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:22:31,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:22:31,250 INFO L82 PathProgramCache]: Analyzing trace with hash -1807198399, now seen corresponding path program 1 times [2020-12-22 08:22:31,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:22:31,251 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508539409] [2020-12-22 08:22:31,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:22:31,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:22:31,310 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:22:31,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508539409] [2020-12-22 08:22:31,310 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:22:31,310 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:22:31,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464853770] [2020-12-22 08:22:31,311 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:22:31,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:22:31,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:22:31,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:22:31,312 INFO L87 Difference]: Start difference. First operand 44116 states and 63104 transitions. Second operand 3 states. [2020-12-22 08:22:36,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:22:36,949 INFO L93 Difference]: Finished difference Result 90088 states and 128859 transitions. [2020-12-22 08:22:36,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:22:36,950 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 79 [2020-12-22 08:22:36,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:22:37,041 INFO L225 Difference]: With dead ends: 90088 [2020-12-22 08:22:37,042 INFO L226 Difference]: Without dead ends: 63382 [2020-12-22 08:22:37,081 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:22:37,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63382 states. [2020-12-22 08:22:42,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63382 to 58420. [2020-12-22 08:22:42,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58420 states. [2020-12-22 08:22:42,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58420 states to 58420 states and 82705 transitions. [2020-12-22 08:22:42,830 INFO L78 Accepts]: Start accepts. Automaton has 58420 states and 82705 transitions. Word has length 79 [2020-12-22 08:22:42,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:22:42,830 INFO L481 AbstractCegarLoop]: Abstraction has 58420 states and 82705 transitions. [2020-12-22 08:22:42,830 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:22:42,830 INFO L276 IsEmpty]: Start isEmpty. Operand 58420 states and 82705 transitions. [2020-12-22 08:22:42,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 08:22:42,847 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:22:42,847 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:22:42,847 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 08:22:42,847 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:22:42,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:22:42,848 INFO L82 PathProgramCache]: Analyzing trace with hash 611086120, now seen corresponding path program 1 times [2020-12-22 08:22:42,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:22:42,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398247299] [2020-12-22 08:22:42,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:22:42,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:22:42,896 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:22:42,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398247299] [2020-12-22 08:22:42,897 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:22:42,897 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:22:42,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051714453] [2020-12-22 08:22:42,897 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:22:42,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:22:42,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:22:42,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:22:42,898 INFO L87 Difference]: Start difference. First operand 58420 states and 82705 transitions. Second operand 3 states. [2020-12-22 08:22:49,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:22:49,320 INFO L93 Difference]: Finished difference Result 93972 states and 132386 transitions. [2020-12-22 08:22:49,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:22:49,320 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 79 [2020-12-22 08:22:49,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:22:49,401 INFO L225 Difference]: With dead ends: 93972 [2020-12-22 08:22:49,401 INFO L226 Difference]: Without dead ends: 61947 [2020-12-22 08:22:49,424 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 08:22:49,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61947 states. [2020-12-22 08:22:55,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61947 to 59144. [2020-12-22 08:22:55,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59144 states. [2020-12-22 08:22:55,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59144 states to 59144 states and 82228 transitions. [2020-12-22 08:22:55,414 INFO L78 Accepts]: Start accepts. Automaton has 59144 states and 82228 transitions. Word has length 79 [2020-12-22 08:22:55,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:22:55,414 INFO L481 AbstractCegarLoop]: Abstraction has 59144 states and 82228 transitions. [2020-12-22 08:22:55,414 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:22:55,414 INFO L276 IsEmpty]: Start isEmpty. Operand 59144 states and 82228 transitions. [2020-12-22 08:22:55,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 08:22:55,427 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:22:55,428 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:22:55,428 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 08:22:55,428 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:22:55,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:22:55,429 INFO L82 PathProgramCache]: Analyzing trace with hash 1536259716, now seen corresponding path program 1 times [2020-12-22 08:22:55,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:22:55,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913132710] [2020-12-22 08:22:55,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:22:55,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:22:55,508 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 08:22:55,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913132710] [2020-12-22 08:22:55,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:22:55,509 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:22:55,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416614868] [2020-12-22 08:22:55,510 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:22:55,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:22:55,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:22:55,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:22:55,511 INFO L87 Difference]: Start difference. First operand 59144 states and 82228 transitions. Second operand 6 states. [2020-12-22 08:23:05,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:23:05,504 INFO L93 Difference]: Finished difference Result 128822 states and 181079 transitions. [2020-12-22 08:23:05,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 08:23:05,504 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 79 [2020-12-22 08:23:05,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:23:05,648 INFO L225 Difference]: With dead ends: 128822 [2020-12-22 08:23:05,648 INFO L226 Difference]: Without dead ends: 101015 [2020-12-22 08:23:05,687 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 08:23:05,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101015 states. [2020-12-22 08:23:14,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101015 to 79697. [2020-12-22 08:23:14,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79697 states. [2020-12-22 08:23:14,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79697 states to 79697 states and 110745 transitions. [2020-12-22 08:23:14,156 INFO L78 Accepts]: Start accepts. Automaton has 79697 states and 110745 transitions. Word has length 79 [2020-12-22 08:23:14,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:23:14,156 INFO L481 AbstractCegarLoop]: Abstraction has 79697 states and 110745 transitions. [2020-12-22 08:23:14,156 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:23:14,156 INFO L276 IsEmpty]: Start isEmpty. Operand 79697 states and 110745 transitions. [2020-12-22 08:23:14,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 08:23:14,169 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:23:14,169 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:23:14,169 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 08:23:14,170 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:23:14,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:23:14,170 INFO L82 PathProgramCache]: Analyzing trace with hash -259731985, now seen corresponding path program 1 times [2020-12-22 08:23:14,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:23:14,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142078392] [2020-12-22 08:23:14,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:23:14,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:23:14,235 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 08:23:14,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142078392] [2020-12-22 08:23:14,235 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:23:14,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:23:14,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56078270] [2020-12-22 08:23:14,236 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:23:14,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:23:14,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:23:14,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:23:14,237 INFO L87 Difference]: Start difference. First operand 79697 states and 110745 transitions. Second operand 5 states. [2020-12-22 08:23:27,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:23:27,449 INFO L93 Difference]: Finished difference Result 200082 states and 277196 transitions. [2020-12-22 08:23:27,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:23:27,450 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 79 [2020-12-22 08:23:27,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:23:27,714 INFO L225 Difference]: With dead ends: 200082 [2020-12-22 08:23:27,714 INFO L226 Difference]: Without dead ends: 120509 [2020-12-22 08:23:27,800 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:23:27,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120509 states. [2020-12-22 08:23:40,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120509 to 119976. [2020-12-22 08:23:40,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119976 states. [2020-12-22 08:23:41,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119976 states to 119976 states and 165118 transitions. [2020-12-22 08:23:41,083 INFO L78 Accepts]: Start accepts. Automaton has 119976 states and 165118 transitions. Word has length 79 [2020-12-22 08:23:41,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:23:41,083 INFO L481 AbstractCegarLoop]: Abstraction has 119976 states and 165118 transitions. [2020-12-22 08:23:41,083 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:23:41,083 INFO L276 IsEmpty]: Start isEmpty. Operand 119976 states and 165118 transitions. [2020-12-22 08:23:41,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 08:23:41,096 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:23:41,096 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:23:41,096 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 08:23:41,096 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:23:41,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:23:41,097 INFO L82 PathProgramCache]: Analyzing trace with hash -1327277398, now seen corresponding path program 1 times [2020-12-22 08:23:41,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:23:41,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806085152] [2020-12-22 08:23:41,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:23:41,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:23:41,191 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 08:23:41,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806085152] [2020-12-22 08:23:41,192 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:23:41,192 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:23:41,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614736371] [2020-12-22 08:23:41,192 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:23:41,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:23:41,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:23:41,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:23:41,193 INFO L87 Difference]: Start difference. First operand 119976 states and 165118 transitions. Second operand 6 states. [2020-12-22 08:24:01,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:24:01,231 INFO L93 Difference]: Finished difference Result 207040 states and 287957 transitions. [2020-12-22 08:24:01,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 08:24:01,231 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 79 [2020-12-22 08:24:01,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:24:01,537 INFO L225 Difference]: With dead ends: 207040 [2020-12-22 08:24:01,538 INFO L226 Difference]: Without dead ends: 180875 [2020-12-22 08:24:01,700 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-12-22 08:24:01,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180875 states. [2020-12-22 08:24:18,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180875 to 145392. [2020-12-22 08:24:18,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145392 states. [2020-12-22 08:24:18,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145392 states to 145392 states and 200384 transitions. [2020-12-22 08:24:18,573 INFO L78 Accepts]: Start accepts. Automaton has 145392 states and 200384 transitions. Word has length 79 [2020-12-22 08:24:18,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:24:18,573 INFO L481 AbstractCegarLoop]: Abstraction has 145392 states and 200384 transitions. [2020-12-22 08:24:18,574 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:24:18,574 INFO L276 IsEmpty]: Start isEmpty. Operand 145392 states and 200384 transitions. [2020-12-22 08:24:18,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 08:24:18,585 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:24:18,585 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:24:18,586 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 08:24:18,586 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:24:18,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:24:18,586 INFO L82 PathProgramCache]: Analyzing trace with hash 1216138536, now seen corresponding path program 1 times [2020-12-22 08:24:18,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:24:18,587 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743156083] [2020-12-22 08:24:18,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:24:18,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:24:18,672 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 08:24:18,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743156083] [2020-12-22 08:24:18,672 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:24:18,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:24:18,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033455451] [2020-12-22 08:24:18,673 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:24:18,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:24:18,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:24:18,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:24:18,674 INFO L87 Difference]: Start difference. First operand 145392 states and 200384 transitions. Second operand 6 states.