/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/combinations/pals_lcr.5.ufo.BOUNDED-10.pals+Problem12_label00.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 09:52:57,688 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 09:52:57,691 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 09:52:57,727 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 09:52:57,728 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 09:52:57,729 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 09:52:57,731 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 09:52:57,734 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 09:52:57,737 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 09:52:57,738 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 09:52:57,739 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 09:52:57,741 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 09:52:57,742 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 09:52:57,743 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 09:52:57,745 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 09:52:57,746 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 09:52:57,747 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 09:52:57,749 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 09:52:57,751 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 09:52:57,754 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 09:52:57,756 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 09:52:57,758 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 09:52:57,763 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 09:52:57,765 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 09:52:57,769 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 09:52:57,782 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 09:52:57,783 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 09:52:57,784 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 09:52:57,786 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 09:52:57,834 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 09:52:57,837 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 09:52:57,839 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 09:52:57,839 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 09:52:57,839 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 09:52:57,840 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 09:52:57,840 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 09:52:57,841 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 09:52:57,841 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 09:52:57,841 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 09:52:57,842 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 09:52:57,842 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 09:52:57,842 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 09:52:57,842 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 09:52:57,843 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 09:52:57,843 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 09:52:57,844 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 09:52:57,845 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 09:52:57,845 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 09:52:57,845 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 09:52:57,845 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 09:52:57,846 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 09:52:57,846 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 09:52:57,846 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 09:52:57,846 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 09:52:57,847 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 09:52:58,269 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 09:52:58,301 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 09:52:58,304 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 09:52:58,306 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 09:52:58,307 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 09:52:58,308 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.5.ufo.BOUNDED-10.pals+Problem12_label00.c [2020-12-22 09:52:58,391 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/54d2fb3e9/9271a70ea76541c4a007ec321b50055d/FLAG94e1ec1d5 [2020-12-22 09:52:59,600 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 09:52:59,600 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.5.ufo.BOUNDED-10.pals+Problem12_label00.c [2020-12-22 09:52:59,643 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/54d2fb3e9/9271a70ea76541c4a007ec321b50055d/FLAG94e1ec1d5 [2020-12-22 09:52:59,944 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/54d2fb3e9/9271a70ea76541c4a007ec321b50055d [2020-12-22 09:52:59,947 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 09:52:59,950 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 09:52:59,952 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 09:52:59,952 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 09:52:59,956 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 09:52:59,957 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:52:59" (1/1) ... [2020-12-22 09:52:59,959 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d923c76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:52:59, skipping insertion in model container [2020-12-22 09:52:59,959 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:52:59" (1/1) ... [2020-12-22 09:52:59,967 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 09:53:00,087 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 09:53:00,436 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/combinations/pals_lcr.5.ufo.BOUNDED-10.pals+Problem12_label00.c[11730,11743] [2020-12-22 09:53:00,463 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/combinations/pals_lcr.5.ufo.BOUNDED-10.pals+Problem12_label00.c[13362,13375] [2020-12-22 09:53:01,695 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:53:01,717 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 09:53:01,800 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/combinations/pals_lcr.5.ufo.BOUNDED-10.pals+Problem12_label00.c[11730,11743] [2020-12-22 09:53:01,807 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/combinations/pals_lcr.5.ufo.BOUNDED-10.pals+Problem12_label00.c[13362,13375] [2020-12-22 09:53:02,452 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:53:02,502 INFO L208 MainTranslator]: Completed translation [2020-12-22 09:53:02,503 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:53:02 WrapperNode [2020-12-22 09:53:02,503 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 09:53:02,505 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 09:53:02,513 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 09:53:02,513 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 09:53:02,522 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:53:02" (1/1) ... [2020-12-22 09:53:02,599 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:53:02" (1/1) ... [2020-12-22 09:53:02,988 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 09:53:02,989 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 09:53:02,989 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 09:53:02,989 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 09:53:02,999 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:53:02" (1/1) ... [2020-12-22 09:53:03,000 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:53:02" (1/1) ... [2020-12-22 09:53:03,142 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:53:02" (1/1) ... [2020-12-22 09:53:03,146 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:53:02" (1/1) ... [2020-12-22 09:53:03,489 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:53:02" (1/1) ... [2020-12-22 09:53:03,583 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:53:02" (1/1) ... [2020-12-22 09:53:03,694 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:53:02" (1/1) ... [2020-12-22 09:53:03,854 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 09:53:03,856 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 09:53:03,856 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 09:53:03,856 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 09:53:03,857 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:53:02" (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 09:53:03,979 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 09:53:03,979 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 09:53:03,979 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 09:53:03,980 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 09:53:09,361 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 09:53:09,362 INFO L299 CfgBuilder]: Removed 36 assume(true) statements. [2020-12-22 09:53:09,366 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:53:09 BoogieIcfgContainer [2020-12-22 09:53:09,366 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 09:53:09,369 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 09:53:09,369 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 09:53:09,374 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 09:53:09,374 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 09:52:59" (1/3) ... [2020-12-22 09:53:09,375 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6daec09f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:53:09, skipping insertion in model container [2020-12-22 09:53:09,376 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:53:02" (2/3) ... [2020-12-22 09:53:09,376 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6daec09f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:53:09, skipping insertion in model container [2020-12-22 09:53:09,376 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:53:09" (3/3) ... [2020-12-22 09:53:09,378 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.5.ufo.BOUNDED-10.pals+Problem12_label00.c [2020-12-22 09:53:09,386 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 09:53:09,393 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 09:53:09,414 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 09:53:09,451 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 09:53:09,451 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 09:53:09,451 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 09:53:09,452 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 09:53:09,452 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 09:53:09,452 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 09:53:09,452 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 09:53:09,452 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 09:53:09,497 INFO L276 IsEmpty]: Start isEmpty. Operand 909 states. [2020-12-22 09:53:09,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-22 09:53:09,505 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:53:09,506 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:53:09,507 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:53:09,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:53:09,514 INFO L82 PathProgramCache]: Analyzing trace with hash -1807618123, now seen corresponding path program 1 times [2020-12-22 09:53:09,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:53:09,527 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838732101] [2020-12-22 09:53:09,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:53:09,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:53:09,806 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 09:53:09,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838732101] [2020-12-22 09:53:09,808 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:53:09,808 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 09:53:09,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884012301] [2020-12-22 09:53:09,815 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:53:09,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:53:09,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:53:09,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:53:09,834 INFO L87 Difference]: Start difference. First operand 909 states. Second operand 3 states. [2020-12-22 09:53:15,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:53:15,987 INFO L93 Difference]: Finished difference Result 2536 states and 4876 transitions. [2020-12-22 09:53:15,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:53:15,990 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-12-22 09:53:15,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:53:16,045 INFO L225 Difference]: With dead ends: 2536 [2020-12-22 09:53:16,045 INFO L226 Difference]: Without dead ends: 1594 [2020-12-22 09:53:16,064 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:53:16,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1594 states. [2020-12-22 09:53:16,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1594 to 1594. [2020-12-22 09:53:16,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1594 states. [2020-12-22 09:53:16,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1594 states to 1594 states and 2616 transitions. [2020-12-22 09:53:16,254 INFO L78 Accepts]: Start accepts. Automaton has 1594 states and 2616 transitions. Word has length 16 [2020-12-22 09:53:16,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:53:16,255 INFO L481 AbstractCegarLoop]: Abstraction has 1594 states and 2616 transitions. [2020-12-22 09:53:16,255 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:53:16,255 INFO L276 IsEmpty]: Start isEmpty. Operand 1594 states and 2616 transitions. [2020-12-22 09:53:16,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-22 09:53:16,259 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:53:16,259 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] [2020-12-22 09:53:16,260 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 09:53:16,260 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:53:16,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:53:16,262 INFO L82 PathProgramCache]: Analyzing trace with hash -950839655, now seen corresponding path program 1 times [2020-12-22 09:53:16,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:53:16,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381100007] [2020-12-22 09:53:16,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:53:16,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:53:16,455 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 09:53:16,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381100007] [2020-12-22 09:53:16,457 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:53:16,457 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:53:16,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101653546] [2020-12-22 09:53:16,459 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:53:16,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:53:16,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:53:16,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:53:16,462 INFO L87 Difference]: Start difference. First operand 1594 states and 2616 transitions. Second operand 5 states. [2020-12-22 09:53:16,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:53:16,586 INFO L93 Difference]: Finished difference Result 1650 states and 2702 transitions. [2020-12-22 09:53:16,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:53:16,587 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2020-12-22 09:53:16,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:53:16,597 INFO L225 Difference]: With dead ends: 1650 [2020-12-22 09:53:16,597 INFO L226 Difference]: Without dead ends: 1594 [2020-12-22 09:53:16,599 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:53:16,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1594 states. [2020-12-22 09:53:16,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1594 to 1594. [2020-12-22 09:53:16,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1594 states. [2020-12-22 09:53:16,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1594 states to 1594 states and 2585 transitions. [2020-12-22 09:53:16,646 INFO L78 Accepts]: Start accepts. Automaton has 1594 states and 2585 transitions. Word has length 34 [2020-12-22 09:53:16,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:53:16,646 INFO L481 AbstractCegarLoop]: Abstraction has 1594 states and 2585 transitions. [2020-12-22 09:53:16,646 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:53:16,647 INFO L276 IsEmpty]: Start isEmpty. Operand 1594 states and 2585 transitions. [2020-12-22 09:53:16,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:53:16,657 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:53:16,657 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 09:53:16,658 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 09:53:16,659 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:53:16,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:53:16,662 INFO L82 PathProgramCache]: Analyzing trace with hash -695028240, now seen corresponding path program 1 times [2020-12-22 09:53:16,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:53:16,663 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908799043] [2020-12-22 09:53:16,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:53:16,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:53:16,896 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 09:53:16,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908799043] [2020-12-22 09:53:16,898 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:53:16,898 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:53:16,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782880660] [2020-12-22 09:53:16,900 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:53:16,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:53:16,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:53:16,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:53:16,912 INFO L87 Difference]: Start difference. First operand 1594 states and 2585 transitions. Second operand 3 states. [2020-12-22 09:53:16,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:53:16,967 INFO L93 Difference]: Finished difference Result 1692 states and 2739 transitions. [2020-12-22 09:53:16,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:53:16,968 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 09:53:16,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:53:16,978 INFO L225 Difference]: With dead ends: 1692 [2020-12-22 09:53:16,980 INFO L226 Difference]: Without dead ends: 1640 [2020-12-22 09:53:16,982 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 09:53:16,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1640 states. [2020-12-22 09:53:17,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1640 to 1638. [2020-12-22 09:53:17,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1638 states. [2020-12-22 09:53:17,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1638 states to 1638 states and 2655 transitions. [2020-12-22 09:53:17,051 INFO L78 Accepts]: Start accepts. Automaton has 1638 states and 2655 transitions. Word has length 64 [2020-12-22 09:53:17,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:53:17,052 INFO L481 AbstractCegarLoop]: Abstraction has 1638 states and 2655 transitions. [2020-12-22 09:53:17,052 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:53:17,052 INFO L276 IsEmpty]: Start isEmpty. Operand 1638 states and 2655 transitions. [2020-12-22 09:53:17,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:53:17,055 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:53:17,056 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 09:53:17,056 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 09:53:17,056 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:53:17,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:53:17,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1440610970, now seen corresponding path program 1 times [2020-12-22 09:53:17,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:53:17,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706892269] [2020-12-22 09:53:17,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:53:17,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:53:17,207 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 09:53:17,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706892269] [2020-12-22 09:53:17,210 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:53:17,211 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:53:17,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578217267] [2020-12-22 09:53:17,212 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:53:17,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:53:17,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:53:17,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:53:17,214 INFO L87 Difference]: Start difference. First operand 1638 states and 2655 transitions. Second operand 3 states. [2020-12-22 09:53:17,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:53:17,264 INFO L93 Difference]: Finished difference Result 1818 states and 2939 transitions. [2020-12-22 09:53:17,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:53:17,265 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 09:53:17,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:53:17,276 INFO L225 Difference]: With dead ends: 1818 [2020-12-22 09:53:17,276 INFO L226 Difference]: Without dead ends: 1722 [2020-12-22 09:53:17,278 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 09:53:17,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1722 states. [2020-12-22 09:53:17,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1722 to 1720. [2020-12-22 09:53:17,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1720 states. [2020-12-22 09:53:17,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1720 states to 1720 states and 2784 transitions. [2020-12-22 09:53:17,341 INFO L78 Accepts]: Start accepts. Automaton has 1720 states and 2784 transitions. Word has length 64 [2020-12-22 09:53:17,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:53:17,344 INFO L481 AbstractCegarLoop]: Abstraction has 1720 states and 2784 transitions. [2020-12-22 09:53:17,344 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:53:17,344 INFO L276 IsEmpty]: Start isEmpty. Operand 1720 states and 2784 transitions. [2020-12-22 09:53:17,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:53:17,345 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:53:17,346 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 09:53:17,346 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 09:53:17,346 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:53:17,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:53:17,348 INFO L82 PathProgramCache]: Analyzing trace with hash 914325468, now seen corresponding path program 1 times [2020-12-22 09:53:17,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:53:17,349 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138500884] [2020-12-22 09:53:17,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:53:17,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:53:17,472 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 09:53:17,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138500884] [2020-12-22 09:53:17,474 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:53:17,474 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:53:17,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529626067] [2020-12-22 09:53:17,475 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:53:17,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:53:17,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:53:17,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:53:17,477 INFO L87 Difference]: Start difference. First operand 1720 states and 2784 transitions. Second operand 3 states. [2020-12-22 09:53:17,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:53:17,543 INFO L93 Difference]: Finished difference Result 2052 states and 3306 transitions. [2020-12-22 09:53:17,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:53:17,543 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 09:53:17,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:53:17,556 INFO L225 Difference]: With dead ends: 2052 [2020-12-22 09:53:17,556 INFO L226 Difference]: Without dead ends: 1874 [2020-12-22 09:53:17,558 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 09:53:17,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1874 states. [2020-12-22 09:53:17,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1874 to 1872. [2020-12-22 09:53:17,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1872 states. [2020-12-22 09:53:17,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1872 states to 1872 states and 3020 transitions. [2020-12-22 09:53:17,623 INFO L78 Accepts]: Start accepts. Automaton has 1872 states and 3020 transitions. Word has length 64 [2020-12-22 09:53:17,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:53:17,625 INFO L481 AbstractCegarLoop]: Abstraction has 1872 states and 3020 transitions. [2020-12-22 09:53:17,625 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:53:17,625 INFO L276 IsEmpty]: Start isEmpty. Operand 1872 states and 3020 transitions. [2020-12-22 09:53:17,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:53:17,627 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:53:17,627 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 09:53:17,627 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 09:53:17,628 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:53:17,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:53:17,628 INFO L82 PathProgramCache]: Analyzing trace with hash -1701027568, now seen corresponding path program 1 times [2020-12-22 09:53:17,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:53:17,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639647313] [2020-12-22 09:53:17,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:53:17,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:53:17,714 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 09:53:17,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639647313] [2020-12-22 09:53:17,715 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:53:17,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:53:17,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960435543] [2020-12-22 09:53:17,716 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:53:17,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:53:17,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:53:17,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:53:17,717 INFO L87 Difference]: Start difference. First operand 1872 states and 3020 transitions. Second operand 3 states. [2020-12-22 09:53:17,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:53:17,786 INFO L93 Difference]: Finished difference Result 2484 states and 3974 transitions. [2020-12-22 09:53:17,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:53:17,787 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 09:53:17,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:53:17,800 INFO L225 Difference]: With dead ends: 2484 [2020-12-22 09:53:17,801 INFO L226 Difference]: Without dead ends: 2154 [2020-12-22 09:53:17,803 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 09:53:17,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2154 states. [2020-12-22 09:53:17,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2154 to 2152. [2020-12-22 09:53:17,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2152 states. [2020-12-22 09:53:17,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2152 states to 2152 states and 3448 transitions. [2020-12-22 09:53:17,882 INFO L78 Accepts]: Start accepts. Automaton has 2152 states and 3448 transitions. Word has length 64 [2020-12-22 09:53:17,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:53:17,883 INFO L481 AbstractCegarLoop]: Abstraction has 2152 states and 3448 transitions. [2020-12-22 09:53:17,883 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:53:17,883 INFO L276 IsEmpty]: Start isEmpty. Operand 2152 states and 3448 transitions. [2020-12-22 09:53:17,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:53:17,884 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:53:17,884 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 09:53:17,885 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 09:53:17,885 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:53:17,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:53:17,886 INFO L82 PathProgramCache]: Analyzing trace with hash -1105068988, now seen corresponding path program 1 times [2020-12-22 09:53:17,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:53:17,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796600197] [2020-12-22 09:53:17,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:53:17,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:53:17,952 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 09:53:17,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796600197] [2020-12-22 09:53:17,953 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:53:17,953 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:53:17,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702454069] [2020-12-22 09:53:17,954 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:53:17,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:53:17,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:53:17,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:53:17,955 INFO L87 Difference]: Start difference. First operand 2152 states and 3448 transitions. Second operand 3 states. [2020-12-22 09:53:18,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:53:18,037 INFO L93 Difference]: Finished difference Result 3276 states and 5178 transitions. [2020-12-22 09:53:18,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:53:18,038 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 09:53:18,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:53:18,052 INFO L225 Difference]: With dead ends: 3276 [2020-12-22 09:53:18,052 INFO L226 Difference]: Without dead ends: 2666 [2020-12-22 09:53:18,055 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 09:53:18,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2666 states. [2020-12-22 09:53:18,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2666 to 2664. [2020-12-22 09:53:18,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2664 states. [2020-12-22 09:53:18,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2664 states to 2664 states and 4216 transitions. [2020-12-22 09:53:18,145 INFO L78 Accepts]: Start accepts. Automaton has 2664 states and 4216 transitions. Word has length 64 [2020-12-22 09:53:18,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:53:18,147 INFO L481 AbstractCegarLoop]: Abstraction has 2664 states and 4216 transitions. [2020-12-22 09:53:18,147 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:53:18,147 INFO L276 IsEmpty]: Start isEmpty. Operand 2664 states and 4216 transitions. [2020-12-22 09:53:18,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:53:18,148 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:53:18,148 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 09:53:18,148 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 09:53:18,149 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:53:18,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:53:18,149 INFO L82 PathProgramCache]: Analyzing trace with hash 112916410, now seen corresponding path program 1 times [2020-12-22 09:53:18,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:53:18,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477150798] [2020-12-22 09:53:18,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:53:18,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:53:18,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:53:18,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477150798] [2020-12-22 09:53:18,296 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:53:18,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:53:18,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885629051] [2020-12-22 09:53:18,296 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:53:18,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:53:18,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:53:18,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:53:18,298 INFO L87 Difference]: Start difference. First operand 2664 states and 4216 transitions. Second operand 7 states. [2020-12-22 09:53:19,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:53:19,097 INFO L93 Difference]: Finished difference Result 13884 states and 21346 transitions. [2020-12-22 09:53:19,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 09:53:19,098 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 64 [2020-12-22 09:53:19,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:53:19,201 INFO L225 Difference]: With dead ends: 13884 [2020-12-22 09:53:19,201 INFO L226 Difference]: Without dead ends: 12762 [2020-12-22 09:53:19,210 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-12-22 09:53:19,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12762 states. [2020-12-22 09:53:19,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12762 to 3784. [2020-12-22 09:53:19,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3784 states. [2020-12-22 09:53:19,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3784 states to 3784 states and 5864 transitions. [2020-12-22 09:53:19,545 INFO L78 Accepts]: Start accepts. Automaton has 3784 states and 5864 transitions. Word has length 64 [2020-12-22 09:53:19,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:53:19,546 INFO L481 AbstractCegarLoop]: Abstraction has 3784 states and 5864 transitions. [2020-12-22 09:53:19,546 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:53:19,546 INFO L276 IsEmpty]: Start isEmpty. Operand 3784 states and 5864 transitions. [2020-12-22 09:53:19,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:53:19,547 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:53:19,547 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:53:19,547 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 09:53:19,547 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:53:19,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:53:19,548 INFO L82 PathProgramCache]: Analyzing trace with hash -277208054, now seen corresponding path program 1 times [2020-12-22 09:53:19,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:53:19,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950630831] [2020-12-22 09:53:19,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:53:19,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:53:19,629 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 09:53:19,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950630831] [2020-12-22 09:53:19,631 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:53:19,631 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:53:19,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170918608] [2020-12-22 09:53:19,632 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:53:19,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:53:19,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:53:19,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:53:19,633 INFO L87 Difference]: Start difference. First operand 3784 states and 5864 transitions. Second operand 3 states. [2020-12-22 09:53:19,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:53:19,858 INFO L93 Difference]: Finished difference Result 7070 states and 10780 transitions. [2020-12-22 09:53:19,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:53:19,858 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 66 [2020-12-22 09:53:19,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:53:19,874 INFO L225 Difference]: With dead ends: 7070 [2020-12-22 09:53:19,875 INFO L226 Difference]: Without dead ends: 4828 [2020-12-22 09:53:19,880 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 09:53:19,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4828 states. [2020-12-22 09:53:20,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4828 to 4826. [2020-12-22 09:53:20,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4826 states. [2020-12-22 09:53:20,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4826 states to 4826 states and 7370 transitions. [2020-12-22 09:53:20,163 INFO L78 Accepts]: Start accepts. Automaton has 4826 states and 7370 transitions. Word has length 66 [2020-12-22 09:53:20,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:53:20,168 INFO L481 AbstractCegarLoop]: Abstraction has 4826 states and 7370 transitions. [2020-12-22 09:53:20,169 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:53:20,169 INFO L276 IsEmpty]: Start isEmpty. Operand 4826 states and 7370 transitions. [2020-12-22 09:53:20,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:53:20,177 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:53:20,177 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:53:20,177 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 09:53:20,178 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:53:20,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:53:20,178 INFO L82 PathProgramCache]: Analyzing trace with hash -210714542, now seen corresponding path program 1 times [2020-12-22 09:53:20,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:53:20,179 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685195247] [2020-12-22 09:53:20,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:53:20,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:53:20,422 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 09:53:20,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685195247] [2020-12-22 09:53:20,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:53:20,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:53:20,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440157824] [2020-12-22 09:53:20,423 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:53:20,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:53:20,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:53:20,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:53:20,425 INFO L87 Difference]: Start difference. First operand 4826 states and 7370 transitions. Second operand 7 states. [2020-12-22 09:53:20,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:53:20,953 INFO L93 Difference]: Finished difference Result 8110 states and 12236 transitions. [2020-12-22 09:53:20,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:53:20,954 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 66 [2020-12-22 09:53:20,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:53:20,967 INFO L225 Difference]: With dead ends: 8110 [2020-12-22 09:53:20,967 INFO L226 Difference]: Without dead ends: 4828 [2020-12-22 09:53:20,973 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2020-12-22 09:53:20,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4828 states. [2020-12-22 09:53:21,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4828 to 4826. [2020-12-22 09:53:21,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4826 states. [2020-12-22 09:53:21,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4826 states to 4826 states and 7322 transitions. [2020-12-22 09:53:21,233 INFO L78 Accepts]: Start accepts. Automaton has 4826 states and 7322 transitions. Word has length 66 [2020-12-22 09:53:21,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:53:21,233 INFO L481 AbstractCegarLoop]: Abstraction has 4826 states and 7322 transitions. [2020-12-22 09:53:21,233 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:53:21,233 INFO L276 IsEmpty]: Start isEmpty. Operand 4826 states and 7322 transitions. [2020-12-22 09:53:21,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 09:53:21,234 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:53:21,234 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] [2020-12-22 09:53:21,234 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 09:53:21,235 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:53:21,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:53:21,235 INFO L82 PathProgramCache]: Analyzing trace with hash 1643060746, now seen corresponding path program 1 times [2020-12-22 09:53:21,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:53:21,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484244634] [2020-12-22 09:53:21,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:53:21,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:53:21,348 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 09:53:21,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484244634] [2020-12-22 09:53:21,349 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:53:21,349 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:53:21,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026689480] [2020-12-22 09:53:21,349 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:53:21,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:53:21,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:53:21,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:53:21,353 INFO L87 Difference]: Start difference. First operand 4826 states and 7322 transitions. Second operand 6 states. [2020-12-22 09:53:21,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:53:21,763 INFO L93 Difference]: Finished difference Result 8108 states and 12139 transitions. [2020-12-22 09:53:21,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:53:21,764 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 67 [2020-12-22 09:53:21,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:53:21,778 INFO L225 Difference]: With dead ends: 8108 [2020-12-22 09:53:21,778 INFO L226 Difference]: Without dead ends: 4826 [2020-12-22 09:53:21,784 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:53:21,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4826 states. [2020-12-22 09:53:22,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4826 to 4826. [2020-12-22 09:53:22,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4826 states. [2020-12-22 09:53:22,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4826 states to 4826 states and 7274 transitions. [2020-12-22 09:53:22,068 INFO L78 Accepts]: Start accepts. Automaton has 4826 states and 7274 transitions. Word has length 67 [2020-12-22 09:53:22,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:53:22,068 INFO L481 AbstractCegarLoop]: Abstraction has 4826 states and 7274 transitions. [2020-12-22 09:53:22,068 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:53:22,068 INFO L276 IsEmpty]: Start isEmpty. Operand 4826 states and 7274 transitions. [2020-12-22 09:53:22,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 09:53:22,069 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:53:22,069 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] [2020-12-22 09:53:22,070 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 09:53:22,070 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:53:22,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:53:22,070 INFO L82 PathProgramCache]: Analyzing trace with hash -1372042872, now seen corresponding path program 1 times [2020-12-22 09:53:22,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:53:22,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889791963] [2020-12-22 09:53:22,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:53:22,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:53:22,183 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 09:53:22,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889791963] [2020-12-22 09:53:22,183 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:53:22,184 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:53:22,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382481751] [2020-12-22 09:53:22,184 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:53:22,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:53:22,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:53:22,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:53:22,185 INFO L87 Difference]: Start difference. First operand 4826 states and 7274 transitions. Second operand 6 states. [2020-12-22 09:53:22,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:53:22,619 INFO L93 Difference]: Finished difference Result 8108 states and 12043 transitions. [2020-12-22 09:53:22,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:53:22,619 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 67 [2020-12-22 09:53:22,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:53:22,630 INFO L225 Difference]: With dead ends: 8108 [2020-12-22 09:53:22,631 INFO L226 Difference]: Without dead ends: 4826 [2020-12-22 09:53:22,636 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:53:22,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4826 states. [2020-12-22 09:53:22,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4826 to 4826. [2020-12-22 09:53:22,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4826 states. [2020-12-22 09:53:22,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4826 states to 4826 states and 7226 transitions. [2020-12-22 09:53:22,925 INFO L78 Accepts]: Start accepts. Automaton has 4826 states and 7226 transitions. Word has length 67 [2020-12-22 09:53:22,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:53:22,925 INFO L481 AbstractCegarLoop]: Abstraction has 4826 states and 7226 transitions. [2020-12-22 09:53:22,926 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:53:22,926 INFO L276 IsEmpty]: Start isEmpty. Operand 4826 states and 7226 transitions. [2020-12-22 09:53:22,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 09:53:22,927 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:53:22,927 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] [2020-12-22 09:53:22,927 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 09:53:22,927 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:53:22,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:53:22,928 INFO L82 PathProgramCache]: Analyzing trace with hash 316900870, now seen corresponding path program 1 times [2020-12-22 09:53:22,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:53:22,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404388757] [2020-12-22 09:53:22,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:53:22,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:53:23,013 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 09:53:23,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404388757] [2020-12-22 09:53:23,013 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:53:23,014 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:53:23,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032193838] [2020-12-22 09:53:23,014 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:53:23,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:53:23,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:53:23,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:53:23,015 INFO L87 Difference]: Start difference. First operand 4826 states and 7226 transitions. Second operand 5 states. [2020-12-22 09:53:23,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:53:23,571 INFO L93 Difference]: Finished difference Result 7669 states and 11200 transitions. [2020-12-22 09:53:23,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:53:23,572 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 67 [2020-12-22 09:53:23,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:53:23,598 INFO L225 Difference]: With dead ends: 7669 [2020-12-22 09:53:23,598 INFO L226 Difference]: Without dead ends: 7667 [2020-12-22 09:53:23,603 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 09:53:23,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7667 states. [2020-12-22 09:53:23,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7667 to 5018. [2020-12-22 09:53:23,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5018 states. [2020-12-22 09:53:24,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5018 states to 5018 states and 7402 transitions. [2020-12-22 09:53:24,015 INFO L78 Accepts]: Start accepts. Automaton has 5018 states and 7402 transitions. Word has length 67 [2020-12-22 09:53:24,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:53:24,016 INFO L481 AbstractCegarLoop]: Abstraction has 5018 states and 7402 transitions. [2020-12-22 09:53:24,016 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:53:24,016 INFO L276 IsEmpty]: Start isEmpty. Operand 5018 states and 7402 transitions. [2020-12-22 09:53:24,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-12-22 09:53:24,018 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:53:24,019 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:53:24,019 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 09:53:24,019 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:53:24,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:53:24,020 INFO L82 PathProgramCache]: Analyzing trace with hash 1062135174, now seen corresponding path program 1 times [2020-12-22 09:53:24,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:53:24,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005199912] [2020-12-22 09:53:24,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:53:24,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:53:24,178 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:53:24,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005199912] [2020-12-22 09:53:24,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:53:24,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:53:24,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379206043] [2020-12-22 09:53:24,179 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:53:24,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:53:24,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:53:24,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:53:24,180 INFO L87 Difference]: Start difference. First operand 5018 states and 7402 transitions. Second operand 3 states. [2020-12-22 09:53:30,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:53:30,497 INFO L93 Difference]: Finished difference Result 8024 states and 12329 transitions. [2020-12-22 09:53:30,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:53:30,497 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 87 [2020-12-22 09:53:30,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:53:30,510 INFO L225 Difference]: With dead ends: 8024 [2020-12-22 09:53:30,511 INFO L226 Difference]: Without dead ends: 6520 [2020-12-22 09:53:30,515 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 09:53:30,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6520 states. [2020-12-22 09:53:30,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6520 to 6520. [2020-12-22 09:53:30,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6520 states. [2020-12-22 09:53:30,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6520 states to 6520 states and 9558 transitions. [2020-12-22 09:53:30,858 INFO L78 Accepts]: Start accepts. Automaton has 6520 states and 9558 transitions. Word has length 87 [2020-12-22 09:53:30,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:53:30,858 INFO L481 AbstractCegarLoop]: Abstraction has 6520 states and 9558 transitions. [2020-12-22 09:53:30,858 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:53:30,858 INFO L276 IsEmpty]: Start isEmpty. Operand 6520 states and 9558 transitions. [2020-12-22 09:53:30,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-12-22 09:53:30,861 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:53:30,861 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:53:30,861 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 09:53:30,861 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:53:30,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:53:30,862 INFO L82 PathProgramCache]: Analyzing trace with hash 2038194161, now seen corresponding path program 1 times [2020-12-22 09:53:30,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:53:30,862 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389785286] [2020-12-22 09:53:30,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:53:30,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:53:30,933 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:53:30,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389785286] [2020-12-22 09:53:30,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:53:30,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 09:53:30,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906247730] [2020-12-22 09:53:30,935 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:53:30,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:53:30,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:53:30,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:53:30,936 INFO L87 Difference]: Start difference. First operand 6520 states and 9558 transitions. Second operand 3 states. [2020-12-22 09:53:37,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:53:37,237 INFO L93 Difference]: Finished difference Result 12530 states and 18797 transitions. [2020-12-22 09:53:37,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:53:37,238 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 90 [2020-12-22 09:53:37,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:53:37,262 INFO L225 Difference]: With dead ends: 12530 [2020-12-22 09:53:37,262 INFO L226 Difference]: Without dead ends: 9524 [2020-12-22 09:53:37,270 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:53:37,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9524 states. [2020-12-22 09:53:37,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9524 to 9524. [2020-12-22 09:53:37,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9524 states. [2020-12-22 09:53:37,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9524 states to 9524 states and 12958 transitions. [2020-12-22 09:53:37,862 INFO L78 Accepts]: Start accepts. Automaton has 9524 states and 12958 transitions. Word has length 90 [2020-12-22 09:53:37,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:53:37,862 INFO L481 AbstractCegarLoop]: Abstraction has 9524 states and 12958 transitions. [2020-12-22 09:53:37,862 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:53:37,862 INFO L276 IsEmpty]: Start isEmpty. Operand 9524 states and 12958 transitions. [2020-12-22 09:53:37,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-22 09:53:37,866 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:53:37,867 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:53:37,867 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 09:53:37,867 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:53:37,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:53:37,868 INFO L82 PathProgramCache]: Analyzing trace with hash -1065285143, now seen corresponding path program 1 times [2020-12-22 09:53:37,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:53:37,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793595267] [2020-12-22 09:53:37,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:53:37,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:53:38,038 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 09:53:38,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793595267] [2020-12-22 09:53:38,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:53:38,041 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:53:38,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727099555] [2020-12-22 09:53:38,041 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:53:38,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:53:38,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:53:38,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:53:38,043 INFO L87 Difference]: Start difference. First operand 9524 states and 12958 transitions. Second operand 7 states. [2020-12-22 09:53:39,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:53:39,517 INFO L93 Difference]: Finished difference Result 27600 states and 38388 transitions. [2020-12-22 09:53:39,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:53:39,518 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 95 [2020-12-22 09:53:39,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:53:39,568 INFO L225 Difference]: With dead ends: 27600 [2020-12-22 09:53:39,568 INFO L226 Difference]: Without dead ends: 24126 [2020-12-22 09:53:39,583 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:53:39,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24126 states. [2020-12-22 09:53:40,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24126 to 12996. [2020-12-22 09:53:40,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12996 states. [2020-12-22 09:53:40,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12996 states to 12996 states and 17806 transitions. [2020-12-22 09:53:40,475 INFO L78 Accepts]: Start accepts. Automaton has 12996 states and 17806 transitions. Word has length 95 [2020-12-22 09:53:40,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:53:40,476 INFO L481 AbstractCegarLoop]: Abstraction has 12996 states and 17806 transitions. [2020-12-22 09:53:40,476 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:53:40,476 INFO L276 IsEmpty]: Start isEmpty. Operand 12996 states and 17806 transitions. [2020-12-22 09:53:40,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-22 09:53:40,480 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:53:40,481 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:53:40,481 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 09:53:40,481 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:53:40,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:53:40,482 INFO L82 PathProgramCache]: Analyzing trace with hash 1460899337, now seen corresponding path program 1 times [2020-12-22 09:53:40,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:53:40,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685602356] [2020-12-22 09:53:40,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:53:40,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:53:40,626 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 09:53:40,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685602356] [2020-12-22 09:53:40,627 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:53:40,627 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:53:40,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630964116] [2020-12-22 09:53:40,628 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:53:40,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:53:40,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:53:40,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:53:40,629 INFO L87 Difference]: Start difference. First operand 12996 states and 17806 transitions. Second operand 7 states. [2020-12-22 09:53:41,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:53:41,961 INFO L93 Difference]: Finished difference Result 31072 states and 43236 transitions. [2020-12-22 09:53:41,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:53:41,961 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 95 [2020-12-22 09:53:41,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:53:42,008 INFO L225 Difference]: With dead ends: 31072 [2020-12-22 09:53:42,009 INFO L226 Difference]: Without dead ends: 27598 [2020-12-22 09:53:42,024 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:53:42,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27598 states. [2020-12-22 09:53:43,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27598 to 18212. [2020-12-22 09:53:43,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18212 states. [2020-12-22 09:53:43,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18212 states to 18212 states and 25038 transitions. [2020-12-22 09:53:43,142 INFO L78 Accepts]: Start accepts. Automaton has 18212 states and 25038 transitions. Word has length 95 [2020-12-22 09:53:43,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:53:43,142 INFO L481 AbstractCegarLoop]: Abstraction has 18212 states and 25038 transitions. [2020-12-22 09:53:43,142 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:53:43,143 INFO L276 IsEmpty]: Start isEmpty. Operand 18212 states and 25038 transitions. [2020-12-22 09:53:43,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-22 09:53:43,150 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:53:43,150 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:53:43,151 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 09:53:43,151 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:53:43,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:53:43,151 INFO L82 PathProgramCache]: Analyzing trace with hash -1702428119, now seen corresponding path program 1 times [2020-12-22 09:53:43,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:53:43,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930730053] [2020-12-22 09:53:43,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:53:43,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:53:43,266 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 09:53:43,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930730053] [2020-12-22 09:53:43,269 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:53:43,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:53:43,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794456774] [2020-12-22 09:53:43,272 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:53:43,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:53:43,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:53:43,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:53:43,273 INFO L87 Difference]: Start difference. First operand 18212 states and 25038 transitions. Second operand 7 states. [2020-12-22 09:53:44,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:53:44,830 INFO L93 Difference]: Finished difference Result 34544 states and 48084 transitions. [2020-12-22 09:53:44,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:53:44,831 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 95 [2020-12-22 09:53:44,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:53:44,872 INFO L225 Difference]: With dead ends: 34544 [2020-12-22 09:53:44,872 INFO L226 Difference]: Without dead ends: 31070 [2020-12-22 09:53:44,887 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:53:44,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31070 states. [2020-12-22 09:53:46,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31070 to 21684. [2020-12-22 09:53:46,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21684 states. [2020-12-22 09:53:46,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21684 states to 21684 states and 29886 transitions. [2020-12-22 09:53:46,977 INFO L78 Accepts]: Start accepts. Automaton has 21684 states and 29886 transitions. Word has length 95 [2020-12-22 09:53:46,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:53:46,977 INFO L481 AbstractCegarLoop]: Abstraction has 21684 states and 29886 transitions. [2020-12-22 09:53:46,978 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:53:46,978 INFO L276 IsEmpty]: Start isEmpty. Operand 21684 states and 29886 transitions. [2020-12-22 09:53:46,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-22 09:53:46,983 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:53:46,983 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:53:46,984 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 09:53:46,984 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:53:46,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:53:46,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1357080137, now seen corresponding path program 1 times [2020-12-22 09:53:46,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:53:46,985 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445239689] [2020-12-22 09:53:46,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:53:47,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:53:47,118 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 09:53:47,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445239689] [2020-12-22 09:53:47,119 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:53:47,119 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:53:47,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125818298] [2020-12-22 09:53:47,121 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:53:47,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:53:47,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:53:47,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:53:47,122 INFO L87 Difference]: Start difference. First operand 21684 states and 29886 transitions. Second operand 7 states. [2020-12-22 09:53:48,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:53:48,994 INFO L93 Difference]: Finished difference Result 38016 states and 52932 transitions. [2020-12-22 09:53:48,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:53:48,995 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 95 [2020-12-22 09:53:48,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:53:49,030 INFO L225 Difference]: With dead ends: 38016 [2020-12-22 09:53:49,030 INFO L226 Difference]: Without dead ends: 34542 [2020-12-22 09:53:49,045 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:53:49,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34542 states. [2020-12-22 09:53:50,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34542 to 25156. [2020-12-22 09:53:50,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25156 states. [2020-12-22 09:53:50,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25156 states to 25156 states and 34734 transitions. [2020-12-22 09:53:50,709 INFO L78 Accepts]: Start accepts. Automaton has 25156 states and 34734 transitions. Word has length 95 [2020-12-22 09:53:50,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:53:50,710 INFO L481 AbstractCegarLoop]: Abstraction has 25156 states and 34734 transitions. [2020-12-22 09:53:50,710 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:53:50,710 INFO L276 IsEmpty]: Start isEmpty. Operand 25156 states and 34734 transitions. [2020-12-22 09:53:50,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-22 09:53:50,716 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:53:50,716 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:53:50,716 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 09:53:50,716 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:53:50,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:53:50,716 INFO L82 PathProgramCache]: Analyzing trace with hash -63915415, now seen corresponding path program 1 times [2020-12-22 09:53:50,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:53:50,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104818184] [2020-12-22 09:53:50,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:53:50,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:53:50,835 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 09:53:50,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104818184] [2020-12-22 09:53:50,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:53:50,836 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:53:50,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641074956] [2020-12-22 09:53:50,836 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:53:50,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:53:50,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:53:50,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:53:50,837 INFO L87 Difference]: Start difference. First operand 25156 states and 34734 transitions. Second operand 7 states. [2020-12-22 09:53:52,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:53:52,821 INFO L93 Difference]: Finished difference Result 39408 states and 54900 transitions. [2020-12-22 09:53:52,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:53:52,822 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 95 [2020-12-22 09:53:52,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:53:52,863 INFO L225 Difference]: With dead ends: 39408 [2020-12-22 09:53:52,863 INFO L226 Difference]: Without dead ends: 36974 [2020-12-22 09:53:52,876 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:53:52,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36974 states. [2020-12-22 09:53:54,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36974 to 27588. [2020-12-22 09:53:54,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27588 states. [2020-12-22 09:53:54,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27588 states to 27588 states and 38158 transitions. [2020-12-22 09:53:54,978 INFO L78 Accepts]: Start accepts. Automaton has 27588 states and 38158 transitions. Word has length 95 [2020-12-22 09:53:54,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:53:54,978 INFO L481 AbstractCegarLoop]: Abstraction has 27588 states and 38158 transitions. [2020-12-22 09:53:54,978 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:53:54,979 INFO L276 IsEmpty]: Start isEmpty. Operand 27588 states and 38158 transitions. [2020-12-22 09:53:54,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-12-22 09:53:54,987 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:53:54,987 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:53:54,988 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 09:53:54,988 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:53:54,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:53:54,989 INFO L82 PathProgramCache]: Analyzing trace with hash -1416628636, now seen corresponding path program 1 times [2020-12-22 09:53:54,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:53:54,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74088459] [2020-12-22 09:53:54,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:53:55,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:53:55,345 WARN L197 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 29 [2020-12-22 09:53:55,450 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:53:55,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74088459] [2020-12-22 09:53:55,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562445637] [2020-12-22 09:53:55,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:53:55,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:53:55,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-22 09:53:55,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:53:56,069 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 09:53:56,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:53:56,070 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 21 [2020-12-22 09:53:56,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109614889] [2020-12-22 09:53:56,072 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 09:53:56,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:53:56,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 09:53:56,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2020-12-22 09:53:56,073 INFO L87 Difference]: Start difference. First operand 27588 states and 38158 transitions. Second operand 21 states. [2020-12-22 09:54:11,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:54:11,199 INFO L93 Difference]: Finished difference Result 144389 states and 199639 transitions. [2020-12-22 09:54:11,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2020-12-22 09:54:11,199 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 96 [2020-12-22 09:54:11,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:54:11,472 INFO L225 Difference]: With dead ends: 144389 [2020-12-22 09:54:11,472 INFO L226 Difference]: Without dead ends: 122851 [2020-12-22 09:54:11,525 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4681 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=2354, Invalid=10078, Unknown=0, NotChecked=0, Total=12432 [2020-12-22 09:54:11,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122851 states. [2020-12-22 09:54:18,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122851 to 78268. [2020-12-22 09:54:18,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78268 states. [2020-12-22 09:54:18,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78268 states to 78268 states and 107566 transitions. [2020-12-22 09:54:18,481 INFO L78 Accepts]: Start accepts. Automaton has 78268 states and 107566 transitions. Word has length 96 [2020-12-22 09:54:18,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:54:18,482 INFO L481 AbstractCegarLoop]: Abstraction has 78268 states and 107566 transitions. [2020-12-22 09:54:18,482 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 09:54:18,482 INFO L276 IsEmpty]: Start isEmpty. Operand 78268 states and 107566 transitions. [2020-12-22 09:54:18,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-22 09:54:18,496 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:54:18,497 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:54:18,710 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-22 09:54:18,711 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:54:18,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:54:18,712 INFO L82 PathProgramCache]: Analyzing trace with hash -1879245087, now seen corresponding path program 1 times [2020-12-22 09:54:18,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:54:18,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359329172] [2020-12-22 09:54:18,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:54:18,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:54:19,050 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:54:19,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359329172] [2020-12-22 09:54:19,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080462447] [2020-12-22 09:54:19,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:54:19,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:54:19,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 09:54:19,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:54:19,562 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:54:20,032 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:54:20,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:54:20,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 09:54:20,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727384543] [2020-12-22 09:54:20,037 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 09:54:20,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:54:20,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 09:54:20,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:54:20,038 INFO L87 Difference]: Start difference. First operand 78268 states and 107566 transitions. Second operand 17 states. [2020-12-22 09:54:21,026 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2020-12-22 09:54:24,321 WARN L197 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2020-12-22 09:54:24,490 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-12-22 09:54:24,711 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2020-12-22 09:54:24,966 WARN L197 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 47 [2020-12-22 09:54:25,231 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-12-22 09:54:25,652 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2020-12-22 09:54:25,967 WARN L197 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2020-12-22 09:54:26,333 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-12-22 09:54:26,628 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2020-12-22 09:54:26,960 WARN L197 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 47 [2020-12-22 09:54:28,034 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-12-22 09:54:29,078 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-12-22 09:55:51,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:55:51,756 INFO L93 Difference]: Finished difference Result 954474 states and 1299641 transitions. [2020-12-22 09:55:51,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2020-12-22 09:55:51,760 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 97 [2020-12-22 09:55:51,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:55:53,868 INFO L225 Difference]: With dead ends: 954474 [2020-12-22 09:55:53,868 INFO L226 Difference]: Without dead ends: 882256 [2020-12-22 09:55:54,228 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6261 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=2263, Invalid=14249, Unknown=0, NotChecked=0, Total=16512 [2020-12-22 09:55:55,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 882256 states. [2020-12-22 09:56:33,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 882256 to 341024. [2020-12-22 09:56:33,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 341024 states. [2020-12-22 09:56:34,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341024 states to 341024 states and 464630 transitions. [2020-12-22 09:56:34,207 INFO L78 Accepts]: Start accepts. Automaton has 341024 states and 464630 transitions. Word has length 97 [2020-12-22 09:56:34,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:56:34,207 INFO L481 AbstractCegarLoop]: Abstraction has 341024 states and 464630 transitions. [2020-12-22 09:56:34,207 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 09:56:34,207 INFO L276 IsEmpty]: Start isEmpty. Operand 341024 states and 464630 transitions. [2020-12-22 09:56:34,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-22 09:56:34,222 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:56:34,223 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:56:34,434 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:56:34,435 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:56:34,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:56:34,437 INFO L82 PathProgramCache]: Analyzing trace with hash -135405655, now seen corresponding path program 1 times [2020-12-22 09:56:34,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:56:34,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216198663] [2020-12-22 09:56:34,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:56:34,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:56:34,504 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:56:34,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216198663] [2020-12-22 09:56:34,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:56:34,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:56:34,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376782170] [2020-12-22 09:56:34,506 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:56:34,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:56:34,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:56:34,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:56:34,507 INFO L87 Difference]: Start difference. First operand 341024 states and 464630 transitions. Second operand 3 states.