/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.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 08:15:05,246 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 08:15:05,250 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 08:15:05,305 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 08:15:05,306 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 08:15:05,310 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 08:15:05,313 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 08:15:05,329 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 08:15:05,332 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 08:15:05,339 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 08:15:05,340 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 08:15:05,342 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 08:15:05,342 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 08:15:05,345 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 08:15:05,347 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 08:15:05,349 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 08:15:05,350 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 08:15:05,352 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 08:15:05,359 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 08:15:05,366 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 08:15:05,368 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 08:15:05,371 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 08:15:05,373 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 08:15:05,375 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 08:15:05,385 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 08:15:05,391 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 08:15:05,392 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 08:15:05,394 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 08:15:05,395 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 08:15:05,396 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 08:15:05,396 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 08:15:05,397 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 08:15:05,397 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 08:15:05,397 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 08:15:05,398 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 08:15:05,399 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 08:15:05,400 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 08:15:05,452 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 08:15:05,452 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 08:15:05,457 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 08:15:05,457 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 08:15:05,458 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 08:15:05,458 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 08:15:05,458 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 08:15:05,458 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 08:15:05,458 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 08:15:05,459 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 08:15:05,460 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 08:15:05,460 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 08:15:05,460 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 08:15:05,461 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 08:15:05,461 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 08:15:05,461 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 08:15:05,461 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 08:15:05,461 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 08:15:05,462 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 08:15:05,462 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 08:15:05,462 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 08:15:05,463 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 08:15:05,463 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 08:15:05,463 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 08:15:05,463 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 08:15:05,463 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 08:15:05,841 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 08:15:05,868 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 08:15:05,871 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 08:15:05,872 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 08:15:05,873 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 08:15:05,874 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-12-22 08:15:05,962 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ca551db4/b420f45b58054d8d9c49376e2d873e18/FLAG9a676a690 [2020-12-22 08:15:06,739 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 08:15:06,739 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-12-22 08:15:06,756 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ca551db4/b420f45b58054d8d9c49376e2d873e18/FLAG9a676a690 [2020-12-22 08:15:07,011 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ca551db4/b420f45b58054d8d9c49376e2d873e18 [2020-12-22 08:15:07,014 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 08:15:07,017 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 08:15:07,018 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 08:15:07,019 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 08:15:07,022 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 08:15:07,023 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:15:07" (1/1) ... [2020-12-22 08:15:07,024 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f31d599 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:15:07, skipping insertion in model container [2020-12-22 08:15:07,025 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:15:07" (1/1) ... [2020-12-22 08:15:07,033 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 08:15:07,076 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 08:15:07,298 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.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c[7067,7080] [2020-12-22 08:15:07,359 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:15:07,382 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 08:15:07,463 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.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c[7067,7080] [2020-12-22 08:15:07,494 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:15:07,517 INFO L208 MainTranslator]: Completed translation [2020-12-22 08:15:07,518 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:15:07 WrapperNode [2020-12-22 08:15:07,518 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 08:15:07,520 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 08:15:07,520 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 08:15:07,520 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 08:15:07,533 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:15:07" (1/1) ... [2020-12-22 08:15:07,547 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:15:07" (1/1) ... [2020-12-22 08:15:07,597 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 08:15:07,598 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 08:15:07,599 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 08:15:07,599 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 08:15:07,609 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:15:07" (1/1) ... [2020-12-22 08:15:07,609 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:15:07" (1/1) ... [2020-12-22 08:15:07,614 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:15:07" (1/1) ... [2020-12-22 08:15:07,616 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:15:07" (1/1) ... [2020-12-22 08:15:07,639 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:15:07" (1/1) ... [2020-12-22 08:15:07,656 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:15:07" (1/1) ... [2020-12-22 08:15:07,664 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:15:07" (1/1) ... [2020-12-22 08:15:07,671 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 08:15:07,674 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 08:15:07,674 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 08:15:07,675 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 08:15:07,676 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:15:07" (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 08:15:07,765 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 08:15:07,765 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 08:15:07,765 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 08:15:07,765 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 08:15:08,618 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 08:15:08,619 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-22 08:15:08,621 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:15:08 BoogieIcfgContainer [2020-12-22 08:15:08,621 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 08:15:08,623 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 08:15:08,623 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 08:15:08,626 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 08:15:08,627 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 08:15:07" (1/3) ... [2020-12-22 08:15:08,627 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@627812c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:15:08, skipping insertion in model container [2020-12-22 08:15:08,628 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:15:07" (2/3) ... [2020-12-22 08:15:08,628 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@627812c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:15:08, skipping insertion in model container [2020-12-22 08:15:08,628 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:15:08" (3/3) ... [2020-12-22 08:15:08,630 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-12-22 08:15:08,637 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 08:15:08,642 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 08:15:08,661 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 08:15:08,691 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 08:15:08,691 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 08:15:08,691 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 08:15:08,691 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 08:15:08,691 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 08:15:08,691 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 08:15:08,692 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 08:15:08,692 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 08:15:08,711 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states. [2020-12-22 08:15:08,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-22 08:15:08,720 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:15:08,721 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 08:15:08,721 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:15:08,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:15:08,729 INFO L82 PathProgramCache]: Analyzing trace with hash 985312972, now seen corresponding path program 1 times [2020-12-22 08:15:08,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:15:08,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507137405] [2020-12-22 08:15:08,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:15:08,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:15:09,142 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 08:15:09,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507137405] [2020-12-22 08:15:09,144 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:15:09,144 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:15:09,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335662266] [2020-12-22 08:15:09,150 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:15:09,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:15:09,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:15:09,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:15:09,172 INFO L87 Difference]: Start difference. First operand 162 states. Second operand 3 states. [2020-12-22 08:15:09,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:15:09,353 INFO L93 Difference]: Finished difference Result 310 states and 504 transitions. [2020-12-22 08:15:09,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:15:09,355 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 50 [2020-12-22 08:15:09,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:15:09,382 INFO L225 Difference]: With dead ends: 310 [2020-12-22 08:15:09,383 INFO L226 Difference]: Without dead ends: 237 [2020-12-22 08:15:09,387 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 08:15:09,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-12-22 08:15:09,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 235. [2020-12-22 08:15:09,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2020-12-22 08:15:09,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 349 transitions. [2020-12-22 08:15:09,453 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 349 transitions. Word has length 50 [2020-12-22 08:15:09,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:15:09,454 INFO L481 AbstractCegarLoop]: Abstraction has 235 states and 349 transitions. [2020-12-22 08:15:09,455 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:15:09,455 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 349 transitions. [2020-12-22 08:15:09,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-22 08:15:09,457 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:15:09,457 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:15:09,458 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 08:15:09,458 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:15:09,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:15:09,459 INFO L82 PathProgramCache]: Analyzing trace with hash -722006169, now seen corresponding path program 1 times [2020-12-22 08:15:09,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:15:09,460 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318373529] [2020-12-22 08:15:09,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:15:09,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:15:09,652 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 08:15:09,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318373529] [2020-12-22 08:15:09,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:15:09,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:15:09,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918613829] [2020-12-22 08:15:09,656 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:15:09,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:15:09,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:15:09,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:15:09,659 INFO L87 Difference]: Start difference. First operand 235 states and 349 transitions. Second operand 3 states. [2020-12-22 08:15:09,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:15:09,768 INFO L93 Difference]: Finished difference Result 574 states and 871 transitions. [2020-12-22 08:15:09,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:15:09,770 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 53 [2020-12-22 08:15:09,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:15:09,777 INFO L225 Difference]: With dead ends: 574 [2020-12-22 08:15:09,777 INFO L226 Difference]: Without dead ends: 397 [2020-12-22 08:15:09,782 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 08:15:09,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2020-12-22 08:15:09,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 395. [2020-12-22 08:15:09,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 395 states. [2020-12-22 08:15:09,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 586 transitions. [2020-12-22 08:15:09,836 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 586 transitions. Word has length 53 [2020-12-22 08:15:09,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:15:09,836 INFO L481 AbstractCegarLoop]: Abstraction has 395 states and 586 transitions. [2020-12-22 08:15:09,836 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:15:09,837 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 586 transitions. [2020-12-22 08:15:09,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-22 08:15:09,841 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:15:09,841 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 08:15:09,841 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 08:15:09,842 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:15:09,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:15:09,843 INFO L82 PathProgramCache]: Analyzing trace with hash -695460410, now seen corresponding path program 1 times [2020-12-22 08:15:09,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:15:09,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731102562] [2020-12-22 08:15:09,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:15:09,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:15:09,943 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 08:15:09,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731102562] [2020-12-22 08:15:09,944 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:15:09,944 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:15:09,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984759200] [2020-12-22 08:15:09,945 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:15:09,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:15:09,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:15:09,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:15:09,947 INFO L87 Difference]: Start difference. First operand 395 states and 586 transitions. Second operand 3 states. [2020-12-22 08:15:10,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:15:10,021 INFO L93 Difference]: Finished difference Result 979 states and 1471 transitions. [2020-12-22 08:15:10,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:15:10,022 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 53 [2020-12-22 08:15:10,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:15:10,026 INFO L225 Difference]: With dead ends: 979 [2020-12-22 08:15:10,027 INFO L226 Difference]: Without dead ends: 684 [2020-12-22 08:15:10,031 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 08:15:10,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2020-12-22 08:15:10,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 682. [2020-12-22 08:15:10,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 682 states. [2020-12-22 08:15:10,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 1004 transitions. [2020-12-22 08:15:10,108 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 1004 transitions. Word has length 53 [2020-12-22 08:15:10,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:15:10,117 INFO L481 AbstractCegarLoop]: Abstraction has 682 states and 1004 transitions. [2020-12-22 08:15:10,117 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:15:10,117 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 1004 transitions. [2020-12-22 08:15:10,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-22 08:15:10,122 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:15:10,122 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 08:15:10,123 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 08:15:10,123 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:15:10,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:15:10,127 INFO L82 PathProgramCache]: Analyzing trace with hash -272648633, now seen corresponding path program 1 times [2020-12-22 08:15:10,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:15:10,127 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471868593] [2020-12-22 08:15:10,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:15:10,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:15:10,225 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 08:15:10,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471868593] [2020-12-22 08:15:10,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:15:10,226 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:15:10,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421539825] [2020-12-22 08:15:10,227 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:15:10,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:15:10,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:15:10,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:15:10,228 INFO L87 Difference]: Start difference. First operand 682 states and 1004 transitions. Second operand 3 states. [2020-12-22 08:15:10,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:15:10,316 INFO L93 Difference]: Finished difference Result 1668 states and 2468 transitions. [2020-12-22 08:15:10,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:15:10,317 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 53 [2020-12-22 08:15:10,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:15:10,323 INFO L225 Difference]: With dead ends: 1668 [2020-12-22 08:15:10,323 INFO L226 Difference]: Without dead ends: 1170 [2020-12-22 08:15:10,325 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 08:15:10,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1170 states. [2020-12-22 08:15:10,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1170 to 1168. [2020-12-22 08:15:10,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1168 states. [2020-12-22 08:15:10,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1168 states to 1168 states and 1691 transitions. [2020-12-22 08:15:10,387 INFO L78 Accepts]: Start accepts. Automaton has 1168 states and 1691 transitions. Word has length 53 [2020-12-22 08:15:10,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:15:10,388 INFO L481 AbstractCegarLoop]: Abstraction has 1168 states and 1691 transitions. [2020-12-22 08:15:10,388 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:15:10,388 INFO L276 IsEmpty]: Start isEmpty. Operand 1168 states and 1691 transitions. [2020-12-22 08:15:10,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 08:15:10,390 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:15:10,390 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 08:15:10,390 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 08:15:10,390 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:15:10,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:15:10,391 INFO L82 PathProgramCache]: Analyzing trace with hash 1724922721, now seen corresponding path program 1 times [2020-12-22 08:15:10,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:15:10,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580729808] [2020-12-22 08:15:10,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:15:10,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:15:10,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:15:10,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580729808] [2020-12-22 08:15:10,514 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:15:10,514 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:15:10,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992701410] [2020-12-22 08:15:10,514 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:15:10,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:15:10,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:15:10,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:15:10,516 INFO L87 Difference]: Start difference. First operand 1168 states and 1691 transitions. Second operand 5 states. [2020-12-22 08:15:10,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:15:10,886 INFO L93 Difference]: Finished difference Result 3282 states and 4783 transitions. [2020-12-22 08:15:10,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:15:10,887 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 54 [2020-12-22 08:15:10,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:15:10,899 INFO L225 Difference]: With dead ends: 3282 [2020-12-22 08:15:10,900 INFO L226 Difference]: Without dead ends: 2142 [2020-12-22 08:15:10,902 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 08:15:10,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2142 states. [2020-12-22 08:15:11,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2142 to 2128. [2020-12-22 08:15:11,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2128 states. [2020-12-22 08:15:11,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2128 states to 2128 states and 3085 transitions. [2020-12-22 08:15:11,064 INFO L78 Accepts]: Start accepts. Automaton has 2128 states and 3085 transitions. Word has length 54 [2020-12-22 08:15:11,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:15:11,065 INFO L481 AbstractCegarLoop]: Abstraction has 2128 states and 3085 transitions. [2020-12-22 08:15:11,065 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:15:11,065 INFO L276 IsEmpty]: Start isEmpty. Operand 2128 states and 3085 transitions. [2020-12-22 08:15:11,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 08:15:11,082 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:15:11,085 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 08:15:11,085 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 08:15:11,085 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:15:11,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:15:11,087 INFO L82 PathProgramCache]: Analyzing trace with hash 1943574737, now seen corresponding path program 1 times [2020-12-22 08:15:11,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:15:11,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462108693] [2020-12-22 08:15:11,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:15:11,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:15:11,200 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 08:15:11,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462108693] [2020-12-22 08:15:11,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:15:11,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:15:11,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790999954] [2020-12-22 08:15:11,202 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:15:11,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:15:11,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:15:11,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:15:11,206 INFO L87 Difference]: Start difference. First operand 2128 states and 3085 transitions. Second operand 5 states. [2020-12-22 08:15:11,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:15:11,608 INFO L93 Difference]: Finished difference Result 6916 states and 10153 transitions. [2020-12-22 08:15:11,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:15:11,609 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 54 [2020-12-22 08:15:11,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:15:11,635 INFO L225 Difference]: With dead ends: 6916 [2020-12-22 08:15:11,635 INFO L226 Difference]: Without dead ends: 5498 [2020-12-22 08:15:11,638 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:15:11,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5498 states. [2020-12-22 08:15:11,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5498 to 2546. [2020-12-22 08:15:11,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2546 states. [2020-12-22 08:15:11,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2546 states to 2546 states and 3706 transitions. [2020-12-22 08:15:11,861 INFO L78 Accepts]: Start accepts. Automaton has 2546 states and 3706 transitions. Word has length 54 [2020-12-22 08:15:11,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:15:11,862 INFO L481 AbstractCegarLoop]: Abstraction has 2546 states and 3706 transitions. [2020-12-22 08:15:11,862 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:15:11,862 INFO L276 IsEmpty]: Start isEmpty. Operand 2546 states and 3706 transitions. [2020-12-22 08:15:11,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 08:15:11,866 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:15:11,866 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 08:15:11,866 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 08:15:11,867 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:15:11,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:15:11,867 INFO L82 PathProgramCache]: Analyzing trace with hash -867408349, now seen corresponding path program 1 times [2020-12-22 08:15:11,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:15:11,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304100582] [2020-12-22 08:15:11,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:15:11,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:15:11,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:15:11,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304100582] [2020-12-22 08:15:11,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:15:11,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:15:11,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734774241] [2020-12-22 08:15:11,973 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:15:11,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:15:11,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:15:11,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:15:11,974 INFO L87 Difference]: Start difference. First operand 2546 states and 3706 transitions. Second operand 6 states. [2020-12-22 08:15:12,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:15:12,648 INFO L93 Difference]: Finished difference Result 7911 states and 11525 transitions. [2020-12-22 08:15:12,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:15:12,648 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 54 [2020-12-22 08:15:12,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:15:12,677 INFO L225 Difference]: With dead ends: 7911 [2020-12-22 08:15:12,677 INFO L226 Difference]: Without dead ends: 5447 [2020-12-22 08:15:12,682 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-12-22 08:15:12,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5447 states. [2020-12-22 08:15:13,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5447 to 5403. [2020-12-22 08:15:13,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5403 states. [2020-12-22 08:15:13,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5403 states to 5403 states and 7837 transitions. [2020-12-22 08:15:13,093 INFO L78 Accepts]: Start accepts. Automaton has 5403 states and 7837 transitions. Word has length 54 [2020-12-22 08:15:13,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:15:13,093 INFO L481 AbstractCegarLoop]: Abstraction has 5403 states and 7837 transitions. [2020-12-22 08:15:13,094 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:15:13,094 INFO L276 IsEmpty]: Start isEmpty. Operand 5403 states and 7837 transitions. [2020-12-22 08:15:13,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 08:15:13,095 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:15:13,096 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 08:15:13,096 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 08:15:13,096 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:15:13,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:15:13,097 INFO L82 PathProgramCache]: Analyzing trace with hash 478354003, now seen corresponding path program 1 times [2020-12-22 08:15:13,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:15:13,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656759402] [2020-12-22 08:15:13,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:15:13,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:15:13,169 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 08:15:13,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656759402] [2020-12-22 08:15:13,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:15:13,170 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:15:13,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215022263] [2020-12-22 08:15:13,171 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:15:13,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:15:13,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:15:13,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:15:13,172 INFO L87 Difference]: Start difference. First operand 5403 states and 7837 transitions. Second operand 5 states. [2020-12-22 08:15:14,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:15:14,100 INFO L93 Difference]: Finished difference Result 16955 states and 24725 transitions. [2020-12-22 08:15:14,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:15:14,101 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 55 [2020-12-22 08:15:14,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:15:14,201 INFO L225 Difference]: With dead ends: 16955 [2020-12-22 08:15:14,201 INFO L226 Difference]: Without dead ends: 13549 [2020-12-22 08:15:14,209 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:15:14,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13549 states. [2020-12-22 08:15:14,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13549 to 6987. [2020-12-22 08:15:14,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6987 states. [2020-12-22 08:15:14,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6987 states to 6987 states and 10204 transitions. [2020-12-22 08:15:14,856 INFO L78 Accepts]: Start accepts. Automaton has 6987 states and 10204 transitions. Word has length 55 [2020-12-22 08:15:14,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:15:14,856 INFO L481 AbstractCegarLoop]: Abstraction has 6987 states and 10204 transitions. [2020-12-22 08:15:14,856 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:15:14,856 INFO L276 IsEmpty]: Start isEmpty. Operand 6987 states and 10204 transitions. [2020-12-22 08:15:14,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 08:15:14,858 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:15:14,859 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 08:15:14,859 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 08:15:14,859 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:15:14,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:15:14,860 INFO L82 PathProgramCache]: Analyzing trace with hash 1521002867, now seen corresponding path program 1 times [2020-12-22 08:15:14,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:15:14,862 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444051753] [2020-12-22 08:15:14,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:15:14,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:15:14,962 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 08:15:14,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444051753] [2020-12-22 08:15:14,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:15:14,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:15:14,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935321181] [2020-12-22 08:15:14,968 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:15:14,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:15:14,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:15:14,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:15:14,970 INFO L87 Difference]: Start difference. First operand 6987 states and 10204 transitions. Second operand 5 states. [2020-12-22 08:15:16,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:15:16,007 INFO L93 Difference]: Finished difference Result 17347 states and 25331 transitions. [2020-12-22 08:15:16,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:15:16,008 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 55 [2020-12-22 08:15:16,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:15:16,041 INFO L225 Difference]: With dead ends: 17347 [2020-12-22 08:15:16,041 INFO L226 Difference]: Without dead ends: 13941 [2020-12-22 08:15:16,050 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:15:16,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13941 states. [2020-12-22 08:15:16,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13941 to 8304. [2020-12-22 08:15:16,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8304 states. [2020-12-22 08:15:16,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8304 states to 8304 states and 12138 transitions. [2020-12-22 08:15:16,819 INFO L78 Accepts]: Start accepts. Automaton has 8304 states and 12138 transitions. Word has length 55 [2020-12-22 08:15:16,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:15:16,820 INFO L481 AbstractCegarLoop]: Abstraction has 8304 states and 12138 transitions. [2020-12-22 08:15:16,820 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:15:16,820 INFO L276 IsEmpty]: Start isEmpty. Operand 8304 states and 12138 transitions. [2020-12-22 08:15:16,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-22 08:15:16,823 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:15:16,823 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:15:16,824 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 08:15:16,824 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:15:16,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:15:16,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1320055476, now seen corresponding path program 1 times [2020-12-22 08:15:16,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:15:16,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884347170] [2020-12-22 08:15:16,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:15:16,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:15:16,899 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 08:15:16,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884347170] [2020-12-22 08:15:16,900 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:15:16,901 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:15:16,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867121736] [2020-12-22 08:15:16,901 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:15:16,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:15:16,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:15:16,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:15:16,903 INFO L87 Difference]: Start difference. First operand 8304 states and 12138 transitions. Second operand 6 states. [2020-12-22 08:15:18,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:15:18,318 INFO L93 Difference]: Finished difference Result 26504 states and 38690 transitions. [2020-12-22 08:15:18,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:15:18,319 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 59 [2020-12-22 08:15:18,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:15:18,362 INFO L225 Difference]: With dead ends: 26504 [2020-12-22 08:15:18,363 INFO L226 Difference]: Without dead ends: 18246 [2020-12-22 08:15:18,378 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-12-22 08:15:18,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18246 states. [2020-12-22 08:15:19,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18246 to 18118. [2020-12-22 08:15:19,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18118 states. [2020-12-22 08:15:19,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18118 states to 18118 states and 26324 transitions. [2020-12-22 08:15:19,559 INFO L78 Accepts]: Start accepts. Automaton has 18118 states and 26324 transitions. Word has length 59 [2020-12-22 08:15:19,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:15:19,560 INFO L481 AbstractCegarLoop]: Abstraction has 18118 states and 26324 transitions. [2020-12-22 08:15:19,560 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:15:19,560 INFO L276 IsEmpty]: Start isEmpty. Operand 18118 states and 26324 transitions. [2020-12-22 08:15:19,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-12-22 08:15:19,565 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:15:19,565 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:15:19,566 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 08:15:19,566 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:15:19,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:15:19,566 INFO L82 PathProgramCache]: Analyzing trace with hash -97252013, now seen corresponding path program 1 times [2020-12-22 08:15:19,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:15:19,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945296964] [2020-12-22 08:15:19,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:15:19,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:15:19,653 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 08:15:19,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945296964] [2020-12-22 08:15:19,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:15:19,654 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:15:19,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708023610] [2020-12-22 08:15:19,654 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 08:15:19,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:15:19,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 08:15:19,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:15:19,657 INFO L87 Difference]: Start difference. First operand 18118 states and 26324 transitions. Second operand 7 states. [2020-12-22 08:15:23,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:15:23,952 INFO L93 Difference]: Finished difference Result 68546 states and 98631 transitions. [2020-12-22 08:15:23,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 08:15:23,952 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 60 [2020-12-22 08:15:23,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:15:24,100 INFO L225 Difference]: With dead ends: 68546 [2020-12-22 08:15:24,100 INFO L226 Difference]: Without dead ends: 60518 [2020-12-22 08:15:24,126 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-12-22 08:15:24,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60518 states. [2020-12-22 08:15:25,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60518 to 18138. [2020-12-22 08:15:25,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18138 states. [2020-12-22 08:15:26,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18138 states to 18138 states and 26348 transitions. [2020-12-22 08:15:26,005 INFO L78 Accepts]: Start accepts. Automaton has 18138 states and 26348 transitions. Word has length 60 [2020-12-22 08:15:26,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:15:26,006 INFO L481 AbstractCegarLoop]: Abstraction has 18138 states and 26348 transitions. [2020-12-22 08:15:26,006 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 08:15:26,006 INFO L276 IsEmpty]: Start isEmpty. Operand 18138 states and 26348 transitions. [2020-12-22 08:15:26,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-12-22 08:15:26,010 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:15:26,011 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:15:26,011 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 08:15:26,011 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:15:26,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:15:26,012 INFO L82 PathProgramCache]: Analyzing trace with hash -172891724, now seen corresponding path program 1 times [2020-12-22 08:15:26,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:15:26,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046921808] [2020-12-22 08:15:26,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:15:26,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:15:26,101 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 08:15:26,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046921808] [2020-12-22 08:15:26,101 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:15:26,102 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:15:26,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483748938] [2020-12-22 08:15:26,102 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 08:15:26,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:15:26,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 08:15:26,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:15:26,103 INFO L87 Difference]: Start difference. First operand 18138 states and 26348 transitions. Second operand 7 states. [2020-12-22 08:15:32,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:15:32,592 INFO L93 Difference]: Finished difference Result 80625 states and 116136 transitions. [2020-12-22 08:15:32,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 08:15:32,593 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 60 [2020-12-22 08:15:32,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:15:32,695 INFO L225 Difference]: With dead ends: 80625 [2020-12-22 08:15:32,695 INFO L226 Difference]: Without dead ends: 72677 [2020-12-22 08:15:32,726 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-12-22 08:15:32,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72677 states. [2020-12-22 08:15:34,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72677 to 18248. [2020-12-22 08:15:34,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18248 states. [2020-12-22 08:15:34,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18248 states to 18248 states and 26490 transitions. [2020-12-22 08:15:34,532 INFO L78 Accepts]: Start accepts. Automaton has 18248 states and 26490 transitions. Word has length 60 [2020-12-22 08:15:34,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:15:34,532 INFO L481 AbstractCegarLoop]: Abstraction has 18248 states and 26490 transitions. [2020-12-22 08:15:34,532 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 08:15:34,532 INFO L276 IsEmpty]: Start isEmpty. Operand 18248 states and 26490 transitions. [2020-12-22 08:15:34,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-12-22 08:15:34,537 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:15:34,537 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:15:34,538 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 08:15:34,538 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:15:34,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:15:34,538 INFO L82 PathProgramCache]: Analyzing trace with hash -2054897963, now seen corresponding path program 1 times [2020-12-22 08:15:34,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:15:34,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133437854] [2020-12-22 08:15:34,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:15:34,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:15:34,624 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 08:15:34,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133437854] [2020-12-22 08:15:34,624 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:15:34,624 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:15:34,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101093677] [2020-12-22 08:15:34,625 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 08:15:34,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:15:34,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 08:15:34,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:15:34,626 INFO L87 Difference]: Start difference. First operand 18248 states and 26490 transitions. Second operand 7 states. [2020-12-22 08:15:44,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:15:44,268 INFO L93 Difference]: Finished difference Result 102986 states and 148176 transitions. [2020-12-22 08:15:44,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 08:15:44,269 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 60 [2020-12-22 08:15:44,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:15:44,413 INFO L225 Difference]: With dead ends: 102986 [2020-12-22 08:15:44,413 INFO L226 Difference]: Without dead ends: 96536 [2020-12-22 08:15:44,449 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-12-22 08:15:44,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96536 states. [2020-12-22 08:15:46,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96536 to 18304. [2020-12-22 08:15:46,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18304 states. [2020-12-22 08:15:46,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18304 states to 18304 states and 26559 transitions. [2020-12-22 08:15:46,946 INFO L78 Accepts]: Start accepts. Automaton has 18304 states and 26559 transitions. Word has length 60 [2020-12-22 08:15:46,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:15:46,946 INFO L481 AbstractCegarLoop]: Abstraction has 18304 states and 26559 transitions. [2020-12-22 08:15:46,946 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 08:15:46,946 INFO L276 IsEmpty]: Start isEmpty. Operand 18304 states and 26559 transitions. [2020-12-22 08:15:46,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-22 08:15:46,951 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:15:46,951 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:15:46,951 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 08:15:46,951 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:15:46,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:15:46,952 INFO L82 PathProgramCache]: Analyzing trace with hash 1036507303, now seen corresponding path program 1 times [2020-12-22 08:15:46,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:15:46,952 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275263309] [2020-12-22 08:15:46,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:15:46,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:15:47,202 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 08:15:47,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275263309] [2020-12-22 08:15:47,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:15:47,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 08:15:47,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123296030] [2020-12-22 08:15:47,203 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 08:15:47,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:15:47,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 08:15:47,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-12-22 08:15:47,204 INFO L87 Difference]: Start difference. First operand 18304 states and 26559 transitions. Second operand 10 states. [2020-12-22 08:15:48,786 WARN L197 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 25 [2020-12-22 08:15:54,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:15:54,519 INFO L93 Difference]: Finished difference Result 62748 states and 90738 transitions. [2020-12-22 08:15:54,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-22 08:15:54,519 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 62 [2020-12-22 08:15:54,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:15:54,574 INFO L225 Difference]: With dead ends: 62748 [2020-12-22 08:15:54,574 INFO L226 Difference]: Without dead ends: 46490 [2020-12-22 08:15:54,592 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=250, Invalid=742, Unknown=0, NotChecked=0, Total=992 [2020-12-22 08:15:54,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46490 states. [2020-12-22 08:15:57,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46490 to 18075. [2020-12-22 08:15:57,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18075 states. [2020-12-22 08:15:57,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18075 states to 18075 states and 26213 transitions. [2020-12-22 08:15:57,090 INFO L78 Accepts]: Start accepts. Automaton has 18075 states and 26213 transitions. Word has length 62 [2020-12-22 08:15:57,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:15:57,091 INFO L481 AbstractCegarLoop]: Abstraction has 18075 states and 26213 transitions. [2020-12-22 08:15:57,091 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 08:15:57,091 INFO L276 IsEmpty]: Start isEmpty. Operand 18075 states and 26213 transitions. [2020-12-22 08:15:57,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-22 08:15:57,096 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:15:57,096 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:15:57,096 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 08:15:57,096 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:15:57,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:15:57,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1459319080, now seen corresponding path program 1 times [2020-12-22 08:15:57,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:15:57,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132546212] [2020-12-22 08:15:57,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:15:57,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:15:57,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:15:57,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132546212] [2020-12-22 08:15:57,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:15:57,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 08:15:57,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111313725] [2020-12-22 08:15:57,272 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 08:15:57,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:15:57,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 08:15:57,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-12-22 08:15:57,273 INFO L87 Difference]: Start difference. First operand 18075 states and 26213 transitions. Second operand 10 states. [2020-12-22 08:16:08,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:16:08,702 INFO L93 Difference]: Finished difference Result 86666 states and 124354 transitions. [2020-12-22 08:16:08,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-22 08:16:08,703 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 62 [2020-12-22 08:16:08,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:16:08,778 INFO L225 Difference]: With dead ends: 86666 [2020-12-22 08:16:08,778 INFO L226 Difference]: Without dead ends: 70311 [2020-12-22 08:16:08,800 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=272, Invalid=850, Unknown=0, NotChecked=0, Total=1122 [2020-12-22 08:16:08,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70311 states. [2020-12-22 08:16:11,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70311 to 17784. [2020-12-22 08:16:11,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17784 states. [2020-12-22 08:16:11,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17784 states to 17784 states and 25787 transitions. [2020-12-22 08:16:11,731 INFO L78 Accepts]: Start accepts. Automaton has 17784 states and 25787 transitions. Word has length 62 [2020-12-22 08:16:11,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:16:11,731 INFO L481 AbstractCegarLoop]: Abstraction has 17784 states and 25787 transitions. [2020-12-22 08:16:11,731 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 08:16:11,731 INFO L276 IsEmpty]: Start isEmpty. Operand 17784 states and 25787 transitions. [2020-12-22 08:16:11,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-22 08:16:11,736 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:16:11,736 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:16:11,736 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 08:16:11,737 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:16:11,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:16:11,737 INFO L82 PathProgramCache]: Analyzing trace with hash 2010042985, now seen corresponding path program 1 times [2020-12-22 08:16:11,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:16:11,737 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928845135] [2020-12-22 08:16:11,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:16:11,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:16:11,942 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 08:16:11,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928845135] [2020-12-22 08:16:11,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:16:11,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 08:16:11,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894048877] [2020-12-22 08:16:11,947 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 08:16:11,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:16:11,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 08:16:11,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-12-22 08:16:11,948 INFO L87 Difference]: Start difference. First operand 17784 states and 25787 transitions. Second operand 10 states. [2020-12-22 08:16:20,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:16:20,469 INFO L93 Difference]: Finished difference Result 62296 states and 90004 transitions. [2020-12-22 08:16:20,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-22 08:16:20,470 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 62 [2020-12-22 08:16:20,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:16:20,515 INFO L225 Difference]: With dead ends: 62296 [2020-12-22 08:16:20,515 INFO L226 Difference]: Without dead ends: 45969 [2020-12-22 08:16:20,528 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=234, Invalid=636, Unknown=0, NotChecked=0, Total=870 [2020-12-22 08:16:20,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45969 states. [2020-12-22 08:16:23,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45969 to 17592. [2020-12-22 08:16:23,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17592 states. [2020-12-22 08:16:23,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17592 states to 17592 states and 25528 transitions. [2020-12-22 08:16:23,513 INFO L78 Accepts]: Start accepts. Automaton has 17592 states and 25528 transitions. Word has length 62 [2020-12-22 08:16:23,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:16:23,513 INFO L481 AbstractCegarLoop]: Abstraction has 17592 states and 25528 transitions. [2020-12-22 08:16:23,513 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 08:16:23,513 INFO L276 IsEmpty]: Start isEmpty. Operand 17592 states and 25528 transitions. [2020-12-22 08:16:23,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 08:16:23,518 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:16:23,518 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:16:23,518 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 08:16:23,518 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:16:23,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:16:23,519 INFO L82 PathProgramCache]: Analyzing trace with hash -1983119998, now seen corresponding path program 1 times [2020-12-22 08:16:23,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:16:23,519 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254441483] [2020-12-22 08:16:23,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:16:23,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:16:23,600 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 08:16:23,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254441483] [2020-12-22 08:16:23,601 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:16:23,601 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:16:23,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731168426] [2020-12-22 08:16:23,602 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:16:23,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:16:23,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:16:23,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:16:23,603 INFO L87 Difference]: Start difference. First operand 17592 states and 25528 transitions. Second operand 3 states. [2020-12-22 08:16:26,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:16:26,835 INFO L93 Difference]: Finished difference Result 24036 states and 34728 transitions. [2020-12-22 08:16:26,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:16:26,836 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 63 [2020-12-22 08:16:26,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:16:26,851 INFO L225 Difference]: With dead ends: 24036 [2020-12-22 08:16:26,851 INFO L226 Difference]: Without dead ends: 17461 [2020-12-22 08:16:26,856 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 08:16:26,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17461 states. [2020-12-22 08:16:29,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17461 to 17459. [2020-12-22 08:16:29,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17459 states. [2020-12-22 08:16:29,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17459 states to 17459 states and 24816 transitions. [2020-12-22 08:16:29,616 INFO L78 Accepts]: Start accepts. Automaton has 17459 states and 24816 transitions. Word has length 63 [2020-12-22 08:16:29,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:16:29,616 INFO L481 AbstractCegarLoop]: Abstraction has 17459 states and 24816 transitions. [2020-12-22 08:16:29,616 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:16:29,617 INFO L276 IsEmpty]: Start isEmpty. Operand 17459 states and 24816 transitions. [2020-12-22 08:16:29,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 08:16:29,621 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:16:29,621 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:16:29,621 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 08:16:29,621 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:16:29,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:16:29,622 INFO L82 PathProgramCache]: Analyzing trace with hash -1051173576, now seen corresponding path program 1 times [2020-12-22 08:16:29,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:16:29,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146833056] [2020-12-22 08:16:29,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:16:29,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:16:29,668 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 08:16:29,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146833056] [2020-12-22 08:16:29,669 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:16:29,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:16:29,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586318675] [2020-12-22 08:16:29,670 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:16:29,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:16:29,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:16:29,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:16:29,671 INFO L87 Difference]: Start difference. First operand 17459 states and 24816 transitions. Second operand 3 states. [2020-12-22 08:16:32,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:16:32,036 INFO L93 Difference]: Finished difference Result 23654 states and 33549 transitions. [2020-12-22 08:16:32,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:16:32,036 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 63 [2020-12-22 08:16:32,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:16:32,052 INFO L225 Difference]: With dead ends: 23654 [2020-12-22 08:16:32,052 INFO L226 Difference]: Without dead ends: 15822 [2020-12-22 08:16:32,061 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:16:32,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15822 states. [2020-12-22 08:16:34,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15822 to 15820. [2020-12-22 08:16:34,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15820 states. [2020-12-22 08:16:34,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15820 states to 15820 states and 22114 transitions. [2020-12-22 08:16:34,480 INFO L78 Accepts]: Start accepts. Automaton has 15820 states and 22114 transitions. Word has length 63 [2020-12-22 08:16:34,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:16:34,480 INFO L481 AbstractCegarLoop]: Abstraction has 15820 states and 22114 transitions. [2020-12-22 08:16:34,480 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:16:34,480 INFO L276 IsEmpty]: Start isEmpty. Operand 15820 states and 22114 transitions. [2020-12-22 08:16:34,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 08:16:34,484 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:16:34,484 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:16:34,484 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 08:16:34,484 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:16:34,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:16:34,485 INFO L82 PathProgramCache]: Analyzing trace with hash -125701859, now seen corresponding path program 1 times [2020-12-22 08:16:34,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:16:34,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823124399] [2020-12-22 08:16:34,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:16:34,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:16:34,526 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 08:16:34,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823124399] [2020-12-22 08:16:34,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:16:34,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:16:34,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583368928] [2020-12-22 08:16:34,528 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:16:34,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:16:34,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:16:34,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:16:34,529 INFO L87 Difference]: Start difference. First operand 15820 states and 22114 transitions. Second operand 3 states. [2020-12-22 08:16:36,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:16:36,948 INFO L93 Difference]: Finished difference Result 20610 states and 28753 transitions. [2020-12-22 08:16:36,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:16:36,948 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 63 [2020-12-22 08:16:36,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:16:36,962 INFO L225 Difference]: With dead ends: 20610 [2020-12-22 08:16:36,962 INFO L226 Difference]: Without dead ends: 13406 [2020-12-22 08:16:36,971 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 08:16:36,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13406 states. [2020-12-22 08:16:38,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13406 to 13404. [2020-12-22 08:16:38,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13404 states. [2020-12-22 08:16:38,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13404 states to 13404 states and 18438 transitions. [2020-12-22 08:16:38,957 INFO L78 Accepts]: Start accepts. Automaton has 13404 states and 18438 transitions. Word has length 63 [2020-12-22 08:16:38,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:16:38,958 INFO L481 AbstractCegarLoop]: Abstraction has 13404 states and 18438 transitions. [2020-12-22 08:16:38,958 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:16:38,958 INFO L276 IsEmpty]: Start isEmpty. Operand 13404 states and 18438 transitions. [2020-12-22 08:16:38,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 08:16:38,961 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:16:38,961 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:16:38,961 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 08:16:38,961 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:16:38,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:16:38,962 INFO L82 PathProgramCache]: Analyzing trace with hash 666404545, now seen corresponding path program 1 times [2020-12-22 08:16:38,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:16:38,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052826035] [2020-12-22 08:16:38,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:16:38,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:16:39,013 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 08:16:39,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052826035] [2020-12-22 08:16:39,014 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:16:39,014 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:16:39,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783638505] [2020-12-22 08:16:39,015 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:16:39,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:16:39,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:16:39,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:16:39,016 INFO L87 Difference]: Start difference. First operand 13404 states and 18438 transitions. Second operand 3 states. [2020-12-22 08:16:42,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:16:42,286 INFO L93 Difference]: Finished difference Result 24782 states and 34230 transitions. [2020-12-22 08:16:42,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:16:42,287 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 08:16:42,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:16:42,305 INFO L225 Difference]: With dead ends: 24782 [2020-12-22 08:16:42,305 INFO L226 Difference]: Without dead ends: 19654 [2020-12-22 08:16:42,311 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 08:16:42,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19654 states. [2020-12-22 08:16:44,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19654 to 13299. [2020-12-22 08:16:44,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13299 states. [2020-12-22 08:16:44,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13299 states to 13299 states and 18268 transitions. [2020-12-22 08:16:44,489 INFO L78 Accepts]: Start accepts. Automaton has 13299 states and 18268 transitions. Word has length 64 [2020-12-22 08:16:44,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:16:44,489 INFO L481 AbstractCegarLoop]: Abstraction has 13299 states and 18268 transitions. [2020-12-22 08:16:44,489 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:16:44,489 INFO L276 IsEmpty]: Start isEmpty. Operand 13299 states and 18268 transitions. [2020-12-22 08:16:44,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 08:16:44,493 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:16:44,493 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:16:44,493 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 08:16:44,493 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:16:44,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:16:44,494 INFO L82 PathProgramCache]: Analyzing trace with hash 859970200, now seen corresponding path program 1 times [2020-12-22 08:16:44,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:16:44,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046677734] [2020-12-22 08:16:44,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:16:44,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:16:45,357 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 08:16:45,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046677734] [2020-12-22 08:16:45,358 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:16:45,358 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2020-12-22 08:16:45,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049699226] [2020-12-22 08:16:45,359 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-22 08:16:45,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:16:45,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-22 08:16:45,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2020-12-22 08:16:45,360 INFO L87 Difference]: Start difference. First operand 13299 states and 18268 transitions. Second operand 23 states. [2020-12-22 08:16:45,576 WARN L197 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 84 [2020-12-22 08:16:46,738 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2020-12-22 08:16:46,972 WARN L197 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 74 [2020-12-22 08:16:47,395 WARN L197 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 89 [2020-12-22 08:16:47,704 WARN L197 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 97 [2020-12-22 08:16:48,097 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-12-22 08:17:02,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:17:02,023 INFO L93 Difference]: Finished difference Result 47861 states and 66470 transitions. [2020-12-22 08:17:02,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-12-22 08:17:02,024 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 64 [2020-12-22 08:17:02,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:17:02,067 INFO L225 Difference]: With dead ends: 47861 [2020-12-22 08:17:02,067 INFO L226 Difference]: Without dead ends: 47117 [2020-12-22 08:17:02,076 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=469, Invalid=2287, Unknown=0, NotChecked=0, Total=2756 [2020-12-22 08:17:02,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47117 states. [2020-12-22 08:17:04,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47117 to 13299. [2020-12-22 08:17:04,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13299 states. [2020-12-22 08:17:04,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13299 states to 13299 states and 18267 transitions. [2020-12-22 08:17:04,847 INFO L78 Accepts]: Start accepts. Automaton has 13299 states and 18267 transitions. Word has length 64 [2020-12-22 08:17:04,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:17:04,848 INFO L481 AbstractCegarLoop]: Abstraction has 13299 states and 18267 transitions. [2020-12-22 08:17:04,848 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-22 08:17:04,848 INFO L276 IsEmpty]: Start isEmpty. Operand 13299 states and 18267 transitions. [2020-12-22 08:17:04,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 08:17:04,850 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:17:04,850 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:17:04,851 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 08:17:04,851 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:17:04,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:17:04,851 INFO L82 PathProgramCache]: Analyzing trace with hash 1948770272, now seen corresponding path program 1 times [2020-12-22 08:17:04,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:17:04,851 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003966145] [2020-12-22 08:17:04,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:17:04,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:17:05,762 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 08:17:05,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003966145] [2020-12-22 08:17:05,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:17:05,763 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2020-12-22 08:17:05,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564489783] [2020-12-22 08:17:05,763 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-22 08:17:05,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:17:05,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-22 08:17:05,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2020-12-22 08:17:05,764 INFO L87 Difference]: Start difference. First operand 13299 states and 18267 transitions. Second operand 23 states. [2020-12-22 08:17:06,057 WARN L197 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 86 [2020-12-22 08:17:07,058 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2020-12-22 08:17:07,442 WARN L197 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 69 [2020-12-22 08:17:07,729 WARN L197 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 81 [2020-12-22 08:17:08,264 WARN L197 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 90 [2020-12-22 08:17:08,638 WARN L197 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 98 [2020-12-22 08:17:08,820 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2020-12-22 08:17:09,073 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2020-12-22 08:17:09,445 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 50 [2020-12-22 08:17:09,695 WARN L197 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2020-12-22 08:17:09,989 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2020-12-22 08:17:10,278 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2020-12-22 08:17:10,615 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2020-12-22 08:17:26,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:17:26,493 INFO L93 Difference]: Finished difference Result 58201 states and 80917 transitions. [2020-12-22 08:17:26,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-12-22 08:17:26,495 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 64 [2020-12-22 08:17:26,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:17:26,561 INFO L225 Difference]: With dead ends: 58201 [2020-12-22 08:17:26,562 INFO L226 Difference]: Without dead ends: 57457 [2020-12-22 08:17:26,575 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=484, Invalid=2066, Unknown=0, NotChecked=0, Total=2550 [2020-12-22 08:17:26,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57457 states. [2020-12-22 08:17:29,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57457 to 13279. [2020-12-22 08:17:29,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13279 states. [2020-12-22 08:17:29,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13279 states to 13279 states and 18240 transitions. [2020-12-22 08:17:29,749 INFO L78 Accepts]: Start accepts. Automaton has 13279 states and 18240 transitions. Word has length 64 [2020-12-22 08:17:29,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:17:29,749 INFO L481 AbstractCegarLoop]: Abstraction has 13279 states and 18240 transitions. [2020-12-22 08:17:29,749 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-22 08:17:29,749 INFO L276 IsEmpty]: Start isEmpty. Operand 13279 states and 18240 transitions. [2020-12-22 08:17:29,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 08:17:29,752 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:17:29,752 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:17:29,752 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 08:17:29,752 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:17:29,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:17:29,753 INFO L82 PathProgramCache]: Analyzing trace with hash 682523932, now seen corresponding path program 1 times [2020-12-22 08:17:29,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:17:29,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523071336] [2020-12-22 08:17:29,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:17:29,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:17:30,562 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 08:17:30,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523071336] [2020-12-22 08:17:30,562 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:17:30,562 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2020-12-22 08:17:30,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8550142] [2020-12-22 08:17:30,563 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-22 08:17:30,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:17:30,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-22 08:17:30,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2020-12-22 08:17:30,564 INFO L87 Difference]: Start difference. First operand 13279 states and 18240 transitions. Second operand 23 states. [2020-12-22 08:17:30,798 WARN L197 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2020-12-22 08:17:31,836 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2020-12-22 08:17:32,037 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2020-12-22 08:17:32,438 WARN L197 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 77 [2020-12-22 08:17:32,707 WARN L197 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 86 [2020-12-22 08:17:33,592 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2020-12-22 08:17:49,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:17:49,112 INFO L93 Difference]: Finished difference Result 43627 states and 60596 transitions. [2020-12-22 08:17:49,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-22 08:17:49,113 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 64 [2020-12-22 08:17:49,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:17:49,154 INFO L225 Difference]: With dead ends: 43627 [2020-12-22 08:17:49,154 INFO L226 Difference]: Without dead ends: 42883 [2020-12-22 08:17:49,163 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=388, Invalid=1682, Unknown=0, NotChecked=0, Total=2070 [2020-12-22 08:17:49,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42883 states. [2020-12-22 08:17:52,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42883 to 13259. [2020-12-22 08:17:52,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13259 states. [2020-12-22 08:17:52,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13259 states to 13259 states and 18213 transitions. [2020-12-22 08:17:52,464 INFO L78 Accepts]: Start accepts. Automaton has 13259 states and 18213 transitions. Word has length 64 [2020-12-22 08:17:52,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:17:52,465 INFO L481 AbstractCegarLoop]: Abstraction has 13259 states and 18213 transitions. [2020-12-22 08:17:52,465 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-22 08:17:52,465 INFO L276 IsEmpty]: Start isEmpty. Operand 13259 states and 18213 transitions. [2020-12-22 08:17:52,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 08:17:52,467 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:17:52,467 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:17:52,467 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 08:17:52,467 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:17:52,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:17:52,468 INFO L82 PathProgramCache]: Analyzing trace with hash -1079669093, now seen corresponding path program 1 times [2020-12-22 08:17:52,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:17:52,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251301316] [2020-12-22 08:17:52,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:17:52,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:17:52,495 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 08:17:52,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251301316] [2020-12-22 08:17:52,496 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:17:52,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:17:52,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788038776] [2020-12-22 08:17:52,497 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:17:52,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:17:52,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:17:52,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:17:52,498 INFO L87 Difference]: Start difference. First operand 13259 states and 18213 transitions. Second operand 3 states. [2020-12-22 08:17:57,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:17:57,345 INFO L93 Difference]: Finished difference Result 24465 states and 33763 transitions. [2020-12-22 08:17:57,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:17:57,346 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 08:17:57,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:17:57,365 INFO L225 Difference]: With dead ends: 24465 [2020-12-22 08:17:57,366 INFO L226 Difference]: Without dead ends: 19378 [2020-12-22 08:17:57,371 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 08:17:57,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19378 states. [2020-12-22 08:18:00,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19378 to 13023. [2020-12-22 08:18:00,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13023 states. [2020-12-22 08:18:00,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13023 states to 13023 states and 17876 transitions. [2020-12-22 08:18:00,857 INFO L78 Accepts]: Start accepts. Automaton has 13023 states and 17876 transitions. Word has length 64 [2020-12-22 08:18:00,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:18:00,857 INFO L481 AbstractCegarLoop]: Abstraction has 13023 states and 17876 transitions. [2020-12-22 08:18:00,857 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:18:00,857 INFO L276 IsEmpty]: Start isEmpty. Operand 13023 states and 17876 transitions. [2020-12-22 08:18:00,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 08:18:00,859 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:18:00,859 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:18:00,860 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-12-22 08:18:00,860 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:18:00,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:18:00,860 INFO L82 PathProgramCache]: Analyzing trace with hash 2017308149, now seen corresponding path program 1 times [2020-12-22 08:18:00,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:18:00,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116170721] [2020-12-22 08:18:00,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:18:00,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:18:00,904 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 08:18:00,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116170721] [2020-12-22 08:18:00,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:18:00,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:18:00,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24036669] [2020-12-22 08:18:00,905 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:18:00,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:18:00,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:18:00,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:18:00,907 INFO L87 Difference]: Start difference. First operand 13023 states and 17876 transitions. Second operand 3 states. [2020-12-22 08:18:05,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:18:05,023 INFO L93 Difference]: Finished difference Result 19669 states and 27000 transitions. [2020-12-22 08:18:05,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:18:05,024 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 08:18:05,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:18:05,038 INFO L225 Difference]: With dead ends: 19669 [2020-12-22 08:18:05,038 INFO L226 Difference]: Without dead ends: 15649 [2020-12-22 08:18:05,042 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 08:18:05,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15649 states. [2020-12-22 08:18:08,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15649 to 12622. [2020-12-22 08:18:08,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12622 states. [2020-12-22 08:18:08,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12622 states to 12622 states and 17326 transitions. [2020-12-22 08:18:08,326 INFO L78 Accepts]: Start accepts. Automaton has 12622 states and 17326 transitions. Word has length 64 [2020-12-22 08:18:08,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:18:08,326 INFO L481 AbstractCegarLoop]: Abstraction has 12622 states and 17326 transitions. [2020-12-22 08:18:08,326 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:18:08,327 INFO L276 IsEmpty]: Start isEmpty. Operand 12622 states and 17326 transitions. [2020-12-22 08:18:08,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 08:18:08,329 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:18:08,329 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:18:08,329 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-12-22 08:18:08,329 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:18:08,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:18:08,329 INFO L82 PathProgramCache]: Analyzing trace with hash 144276108, now seen corresponding path program 1 times [2020-12-22 08:18:08,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:18:08,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527061800] [2020-12-22 08:18:08,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:18:08,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:18:09,151 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 35 [2020-12-22 08:18:09,785 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 08:18:09,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527061800] [2020-12-22 08:18:09,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:18:09,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2020-12-22 08:18:09,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382742621] [2020-12-22 08:18:09,786 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 08:18:09,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:18:09,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 08:18:09,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2020-12-22 08:18:09,787 INFO L87 Difference]: Start difference. First operand 12622 states and 17326 transitions. Second operand 19 states. [2020-12-22 08:18:10,183 WARN L197 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 47 [2020-12-22 08:18:10,576 WARN L197 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-12-22 08:18:10,858 WARN L197 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 44 [2020-12-22 08:18:11,204 WARN L197 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 46 [2020-12-22 08:18:11,629 WARN L197 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 49 [2020-12-22 08:18:12,352 WARN L197 SmtUtils]: Spent 618.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 73 [2020-12-22 08:18:13,105 WARN L197 SmtUtils]: Spent 705.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 83 [2020-12-22 08:18:14,106 WARN L197 SmtUtils]: Spent 827.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 96 [2020-12-22 08:18:15,122 WARN L197 SmtUtils]: Spent 970.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 103 [2020-12-22 08:18:15,915 WARN L197 SmtUtils]: Spent 745.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 90 [2020-12-22 08:18:16,798 WARN L197 SmtUtils]: Spent 767.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 90 [2020-12-22 08:18:17,817 WARN L197 SmtUtils]: Spent 749.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 88 [2020-12-22 08:18:18,729 WARN L197 SmtUtils]: Spent 857.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 98 [2020-12-22 08:18:19,396 WARN L197 SmtUtils]: Spent 407.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 55 [2020-12-22 08:18:20,121 WARN L197 SmtUtils]: Spent 660.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 79 [2020-12-22 08:18:21,237 WARN L197 SmtUtils]: Spent 642.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 76 [2020-12-22 08:18:21,790 WARN L197 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 52 [2020-12-22 08:18:22,556 WARN L197 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 49 [2020-12-22 08:18:34,052 WARN L197 SmtUtils]: Spent 402.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 53 [2020-12-22 08:18:41,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:18:41,475 INFO L93 Difference]: Finished difference Result 49039 states and 67846 transitions. [2020-12-22 08:18:41,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-22 08:18:41,475 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 65 [2020-12-22 08:18:41,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:18:41,520 INFO L225 Difference]: With dead ends: 49039 [2020-12-22 08:18:41,520 INFO L226 Difference]: Without dead ends: 48289 [2020-12-22 08:18:41,529 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=402, Invalid=1578, Unknown=0, NotChecked=0, Total=1980 [2020-12-22 08:18:41,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48289 states. [2020-12-22 08:18:45,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48289 to 12616. [2020-12-22 08:18:45,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12616 states. [2020-12-22 08:18:45,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12616 states to 12616 states and 17318 transitions. [2020-12-22 08:18:45,544 INFO L78 Accepts]: Start accepts. Automaton has 12616 states and 17318 transitions. Word has length 65 [2020-12-22 08:18:45,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:18:45,544 INFO L481 AbstractCegarLoop]: Abstraction has 12616 states and 17318 transitions. [2020-12-22 08:18:45,544 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 08:18:45,544 INFO L276 IsEmpty]: Start isEmpty. Operand 12616 states and 17318 transitions. [2020-12-22 08:18:45,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 08:18:45,546 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:18:45,546 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:18:45,546 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-12-22 08:18:45,546 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:18:45,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:18:45,547 INFO L82 PathProgramCache]: Analyzing trace with hash 402441546, now seen corresponding path program 1 times [2020-12-22 08:18:45,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:18:45,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596128817] [2020-12-22 08:18:45,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:18:45,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:18:46,291 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 08:18:46,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596128817] [2020-12-22 08:18:46,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:18:46,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2020-12-22 08:18:46,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499176113] [2020-12-22 08:18:46,292 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 08:18:46,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:18:46,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 08:18:46,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2020-12-22 08:18:46,293 INFO L87 Difference]: Start difference. First operand 12616 states and 17318 transitions. Second operand 18 states. [2020-12-22 08:18:46,973 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2020-12-22 08:18:47,136 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 44 [2020-12-22 08:18:47,620 WARN L197 SmtUtils]: Spent 381.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 65 [2020-12-22 08:18:48,029 WARN L197 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 75 [2020-12-22 08:18:48,262 WARN L197 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2020-12-22 08:18:48,527 WARN L197 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2020-12-22 08:18:48,996 WARN L197 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 55 [2020-12-22 08:18:49,439 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2020-12-22 08:18:50,168 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2020-12-22 08:19:08,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:19:08,519 INFO L93 Difference]: Finished difference Result 49452 states and 68537 transitions. [2020-12-22 08:19:08,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-22 08:19:08,520 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 65 [2020-12-22 08:19:08,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:19:08,566 INFO L225 Difference]: With dead ends: 49452 [2020-12-22 08:19:08,567 INFO L226 Difference]: Without dead ends: 48286 [2020-12-22 08:19:08,576 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=288, Invalid=1272, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 08:19:08,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48286 states. [2020-12-22 08:19:12,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48286 to 12544. [2020-12-22 08:19:12,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12544 states. [2020-12-22 08:19:12,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12544 states to 12544 states and 17218 transitions. [2020-12-22 08:19:12,885 INFO L78 Accepts]: Start accepts. Automaton has 12544 states and 17218 transitions. Word has length 65 [2020-12-22 08:19:12,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:19:12,885 INFO L481 AbstractCegarLoop]: Abstraction has 12544 states and 17218 transitions. [2020-12-22 08:19:12,885 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 08:19:12,885 INFO L276 IsEmpty]: Start isEmpty. Operand 12544 states and 17218 transitions. [2020-12-22 08:19:12,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-22 08:19:12,889 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:19:12,889 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:19:12,889 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-12-22 08:19:12,889 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:19:12,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:19:12,890 INFO L82 PathProgramCache]: Analyzing trace with hash -1563174538, now seen corresponding path program 1 times [2020-12-22 08:19:12,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:19:12,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38758254] [2020-12-22 08:19:12,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:19:12,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:19:12,973 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 08:19:12,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38758254] [2020-12-22 08:19:12,974 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:19:12,974 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:19:12,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215940345] [2020-12-22 08:19:12,975 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:19:12,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:19:12,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:19:12,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:19:12,976 INFO L87 Difference]: Start difference. First operand 12544 states and 17218 transitions. Second operand 5 states.