/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.3.2.ufo.UNBOUNDED.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 07:39:38,364 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 07:39:38,367 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 07:39:38,424 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 07:39:38,425 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 07:39:38,430 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 07:39:38,434 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 07:39:38,442 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 07:39:38,446 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 07:39:38,452 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 07:39:38,453 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 07:39:38,455 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 07:39:38,455 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 07:39:38,458 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 07:39:38,460 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 07:39:38,462 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 07:39:38,463 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 07:39:38,466 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 07:39:38,474 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 07:39:38,482 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 07:39:38,484 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 07:39:38,486 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 07:39:38,488 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 07:39:38,490 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 07:39:38,500 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-22 07:39:38,500 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-22 07:39:38,500 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-22 07:39:38,503 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-22 07:39:38,504 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-22 07:39:38,505 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-22 07:39:38,506 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 07:39:38,507 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 07:39:38,509 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 07:39:38,510 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 07:39:38,512 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 07:39:38,512 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 07:39:38,513 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 07:39:38,513 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 07:39:38,513 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 07:39:38,515 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 07:39:38,516 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 07:39:38,517 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 07:39:38,571 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 07:39:38,571 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 07:39:38,576 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 07:39:38,577 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 07:39:38,577 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 07:39:38,577 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 07:39:38,578 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 07:39:38,578 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 07:39:38,578 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 07:39:38,579 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 07:39:38,580 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 07:39:38,580 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 07:39:38,580 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 07:39:38,581 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 07:39:38,581 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 07:39:38,581 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 07:39:38,581 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 07:39:38,582 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 07:39:38,582 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 07:39:38,582 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 07:39:38,583 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 07:39:38,583 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 07:39:38,603 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 07:39:38,604 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 07:39:38,604 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 07:39:38,604 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 07:39:39,003 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 07:39:39,033 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 07:39:39,037 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 07:39:39,039 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 07:39:39,040 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 07:39:39,041 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.3.2.ufo.UNBOUNDED.pals.c [2020-12-22 07:39:39,127 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/09dc4b8bc/955e4fd8121b43bcade1e6aa295ea064/FLAG845ef3ef8 [2020-12-22 07:39:39,831 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 07:39:39,831 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.3.2.ufo.UNBOUNDED.pals.c [2020-12-22 07:39:39,844 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/09dc4b8bc/955e4fd8121b43bcade1e6aa295ea064/FLAG845ef3ef8 [2020-12-22 07:39:40,106 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/09dc4b8bc/955e4fd8121b43bcade1e6aa295ea064 [2020-12-22 07:39:40,109 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 07:39:40,111 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 07:39:40,115 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 07:39:40,115 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 07:39:40,119 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 07:39:40,125 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:39:40" (1/1) ... [2020-12-22 07:39:40,127 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c0e7f22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:39:40, skipping insertion in model container [2020-12-22 07:39:40,127 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:39:40" (1/1) ... [2020-12-22 07:39:40,137 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 07:39:40,202 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 07:39:40,433 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.3.2.ufo.UNBOUNDED.pals.c[14521,14534] [2020-12-22 07:39:40,440 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:39:40,460 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 07:39:40,587 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.3.2.ufo.UNBOUNDED.pals.c[14521,14534] [2020-12-22 07:39:40,588 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:39:40,613 INFO L208 MainTranslator]: Completed translation [2020-12-22 07:39:40,614 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:39:40 WrapperNode [2020-12-22 07:39:40,614 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 07:39:40,615 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 07:39:40,616 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 07:39:40,616 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 07:39:40,625 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:39:40" (1/1) ... [2020-12-22 07:39:40,639 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:39:40" (1/1) ... [2020-12-22 07:39:40,700 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 07:39:40,701 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 07:39:40,702 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 07:39:40,702 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 07:39:40,714 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:39:40" (1/1) ... [2020-12-22 07:39:40,714 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:39:40" (1/1) ... [2020-12-22 07:39:40,735 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:39:40" (1/1) ... [2020-12-22 07:39:40,735 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:39:40" (1/1) ... [2020-12-22 07:39:40,760 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:39:40" (1/1) ... [2020-12-22 07:39:40,776 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:39:40" (1/1) ... [2020-12-22 07:39:40,780 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:39:40" (1/1) ... [2020-12-22 07:39:40,787 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 07:39:40,788 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 07:39:40,788 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 07:39:40,788 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 07:39:40,789 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:39:40" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 07:39:40,911 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 07:39:40,912 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 07:39:40,912 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 07:39:40,912 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 07:39:41,926 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 07:39:41,926 INFO L299 CfgBuilder]: Removed 19 assume(true) statements. [2020-12-22 07:39:41,929 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:39:41 BoogieIcfgContainer [2020-12-22 07:39:41,929 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 07:39:41,931 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 07:39:41,931 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 07:39:41,935 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 07:39:41,935 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 07:39:40" (1/3) ... [2020-12-22 07:39:41,936 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51ed17bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:39:41, skipping insertion in model container [2020-12-22 07:39:41,936 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:39:40" (2/3) ... [2020-12-22 07:39:41,937 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51ed17bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:39:41, skipping insertion in model container [2020-12-22 07:39:41,937 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:39:41" (3/3) ... [2020-12-22 07:39:41,938 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.2.ufo.UNBOUNDED.pals.c [2020-12-22 07:39:41,945 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 07:39:41,951 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 07:39:41,972 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 07:39:42,003 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 07:39:42,003 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 07:39:42,003 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 07:39:42,003 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 07:39:42,003 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 07:39:42,004 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 07:39:42,004 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 07:39:42,004 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 07:39:42,024 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states. [2020-12-22 07:39:42,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-22 07:39:42,034 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:39:42,035 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] [2020-12-22 07:39:42,035 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:39:42,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:39:42,042 INFO L82 PathProgramCache]: Analyzing trace with hash -812713456, now seen corresponding path program 1 times [2020-12-22 07:39:42,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:39:42,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689616543] [2020-12-22 07:39:42,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:39:42,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:39:42,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:39:42,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689616543] [2020-12-22 07:39:42,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:39:42,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:39:42,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862935538] [2020-12-22 07:39:42,321 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 07:39:42,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:39:42,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 07:39:42,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 07:39:42,340 INFO L87 Difference]: Start difference. First operand 148 states. Second operand 2 states. [2020-12-22 07:39:42,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:39:42,385 INFO L93 Difference]: Finished difference Result 233 states and 401 transitions. [2020-12-22 07:39:42,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 07:39:42,387 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 37 [2020-12-22 07:39:42,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:39:42,401 INFO L225 Difference]: With dead ends: 233 [2020-12-22 07:39:42,401 INFO L226 Difference]: Without dead ends: 144 [2020-12-22 07:39:42,405 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 07:39:42,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-12-22 07:39:42,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2020-12-22 07:39:42,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-12-22 07:39:42,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 249 transitions. [2020-12-22 07:39:42,459 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 249 transitions. Word has length 37 [2020-12-22 07:39:42,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:39:42,460 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 249 transitions. [2020-12-22 07:39:42,460 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 07:39:42,460 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 249 transitions. [2020-12-22 07:39:42,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-22 07:39:42,463 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:39:42,463 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] [2020-12-22 07:39:42,463 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 07:39:42,464 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:39:42,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:39:42,465 INFO L82 PathProgramCache]: Analyzing trace with hash -1630361906, now seen corresponding path program 1 times [2020-12-22 07:39:42,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:39:42,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408428816] [2020-12-22 07:39:42,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:39:42,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:39:42,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:39:42,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408428816] [2020-12-22 07:39:42,615 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:39:42,615 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:39:42,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69948654] [2020-12-22 07:39:42,618 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:39:42,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:39:42,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:39:42,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:39:42,621 INFO L87 Difference]: Start difference. First operand 144 states and 249 transitions. Second operand 5 states. [2020-12-22 07:39:42,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:39:42,835 INFO L93 Difference]: Finished difference Result 232 states and 394 transitions. [2020-12-22 07:39:42,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 07:39:42,836 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 37 [2020-12-22 07:39:42,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:39:42,843 INFO L225 Difference]: With dead ends: 232 [2020-12-22 07:39:42,844 INFO L226 Difference]: Without dead ends: 144 [2020-12-22 07:39:42,846 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:39:42,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-12-22 07:39:42,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2020-12-22 07:39:42,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-12-22 07:39:42,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 219 transitions. [2020-12-22 07:39:42,873 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 219 transitions. Word has length 37 [2020-12-22 07:39:42,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:39:42,874 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 219 transitions. [2020-12-22 07:39:42,874 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:39:42,874 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 219 transitions. [2020-12-22 07:39:42,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 07:39:42,883 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:39:42,883 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 07:39:42,884 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 07:39:42,886 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:39:42,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:39:42,887 INFO L82 PathProgramCache]: Analyzing trace with hash 190573204, now seen corresponding path program 1 times [2020-12-22 07:39:42,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:39:42,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238146246] [2020-12-22 07:39:42,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:39:42,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:39:43,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:39:43,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238146246] [2020-12-22 07:39:43,077 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:39:43,077 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:39:43,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019104731] [2020-12-22 07:39:43,078 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:39:43,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:39:43,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:39:43,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:39:43,080 INFO L87 Difference]: Start difference. First operand 144 states and 219 transitions. Second operand 3 states. [2020-12-22 07:39:43,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:39:43,148 INFO L93 Difference]: Finished difference Result 302 states and 483 transitions. [2020-12-22 07:39:43,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:39:43,149 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 66 [2020-12-22 07:39:43,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:39:43,151 INFO L225 Difference]: With dead ends: 302 [2020-12-22 07:39:43,151 INFO L226 Difference]: Without dead ends: 218 [2020-12-22 07:39:43,152 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:39:43,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-12-22 07:39:43,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 215. [2020-12-22 07:39:43,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2020-12-22 07:39:43,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 334 transitions. [2020-12-22 07:39:43,169 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 334 transitions. Word has length 66 [2020-12-22 07:39:43,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:39:43,170 INFO L481 AbstractCegarLoop]: Abstraction has 215 states and 334 transitions. [2020-12-22 07:39:43,170 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:39:43,170 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 334 transitions. [2020-12-22 07:39:43,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 07:39:43,172 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:39:43,173 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:39:43,173 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 07:39:43,173 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:39:43,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:39:43,174 INFO L82 PathProgramCache]: Analyzing trace with hash 1527919177, now seen corresponding path program 1 times [2020-12-22 07:39:43,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:39:43,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885656583] [2020-12-22 07:39:43,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:39:43,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:39:43,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:39:43,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885656583] [2020-12-22 07:39:43,308 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:39:43,308 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:39:43,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984177188] [2020-12-22 07:39:43,309 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:39:43,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:39:43,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:39:43,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:39:43,311 INFO L87 Difference]: Start difference. First operand 215 states and 334 transitions. Second operand 3 states. [2020-12-22 07:39:43,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:39:43,355 INFO L93 Difference]: Finished difference Result 509 states and 818 transitions. [2020-12-22 07:39:43,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:39:43,356 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 68 [2020-12-22 07:39:43,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:39:43,359 INFO L225 Difference]: With dead ends: 509 [2020-12-22 07:39:43,359 INFO L226 Difference]: Without dead ends: 354 [2020-12-22 07:39:43,360 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:39:43,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2020-12-22 07:39:43,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 350. [2020-12-22 07:39:43,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 350 states. [2020-12-22 07:39:43,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 555 transitions. [2020-12-22 07:39:43,377 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 555 transitions. Word has length 68 [2020-12-22 07:39:43,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:39:43,378 INFO L481 AbstractCegarLoop]: Abstraction has 350 states and 555 transitions. [2020-12-22 07:39:43,378 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:39:43,378 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 555 transitions. [2020-12-22 07:39:43,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-22 07:39:43,384 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:39:43,384 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:39:43,385 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 07:39:43,385 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:39:43,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:39:43,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1063335298, now seen corresponding path program 1 times [2020-12-22 07:39:43,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:39:43,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368857599] [2020-12-22 07:39:43,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:39:43,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:39:43,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:39:43,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368857599] [2020-12-22 07:39:43,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:39:43,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:39:43,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720776372] [2020-12-22 07:39:43,532 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:39:43,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:39:43,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:39:43,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:39:43,533 INFO L87 Difference]: Start difference. First operand 350 states and 555 transitions. Second operand 3 states. [2020-12-22 07:39:43,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:39:43,591 INFO L93 Difference]: Finished difference Result 898 states and 1453 transitions. [2020-12-22 07:39:43,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:39:43,592 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 70 [2020-12-22 07:39:43,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:39:43,596 INFO L225 Difference]: With dead ends: 898 [2020-12-22 07:39:43,596 INFO L226 Difference]: Without dead ends: 608 [2020-12-22 07:39:43,597 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:39:43,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2020-12-22 07:39:43,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 602. [2020-12-22 07:39:43,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 602 states. [2020-12-22 07:39:43,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 602 states to 602 states and 963 transitions. [2020-12-22 07:39:43,624 INFO L78 Accepts]: Start accepts. Automaton has 602 states and 963 transitions. Word has length 70 [2020-12-22 07:39:43,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:39:43,625 INFO L481 AbstractCegarLoop]: Abstraction has 602 states and 963 transitions. [2020-12-22 07:39:43,625 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:39:43,625 INFO L276 IsEmpty]: Start isEmpty. Operand 602 states and 963 transitions. [2020-12-22 07:39:43,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-22 07:39:43,626 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:39:43,627 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:39:43,627 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 07:39:43,627 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:39:43,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:39:43,628 INFO L82 PathProgramCache]: Analyzing trace with hash 845837107, now seen corresponding path program 1 times [2020-12-22 07:39:43,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:39:43,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887117470] [2020-12-22 07:39:43,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:39:43,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:39:43,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:39:43,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887117470] [2020-12-22 07:39:43,808 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:39:43,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:39:43,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237983733] [2020-12-22 07:39:43,809 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:39:43,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:39:43,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:39:43,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:39:43,811 INFO L87 Difference]: Start difference. First operand 602 states and 963 transitions. Second operand 5 states. [2020-12-22 07:39:44,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:39:44,075 INFO L93 Difference]: Finished difference Result 2296 states and 3768 transitions. [2020-12-22 07:39:44,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:39:44,077 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 72 [2020-12-22 07:39:44,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:39:44,091 INFO L225 Difference]: With dead ends: 2296 [2020-12-22 07:39:44,092 INFO L226 Difference]: Without dead ends: 1754 [2020-12-22 07:39:44,093 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:39:44,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1754 states. [2020-12-22 07:39:44,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1754 to 1077. [2020-12-22 07:39:44,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1077 states. [2020-12-22 07:39:44,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1077 states to 1077 states and 1739 transitions. [2020-12-22 07:39:44,147 INFO L78 Accepts]: Start accepts. Automaton has 1077 states and 1739 transitions. Word has length 72 [2020-12-22 07:39:44,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:39:44,148 INFO L481 AbstractCegarLoop]: Abstraction has 1077 states and 1739 transitions. [2020-12-22 07:39:44,149 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:39:44,149 INFO L276 IsEmpty]: Start isEmpty. Operand 1077 states and 1739 transitions. [2020-12-22 07:39:44,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-12-22 07:39:44,151 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:39:44,151 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:39:44,152 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 07:39:44,152 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:39:44,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:39:44,155 INFO L82 PathProgramCache]: Analyzing trace with hash -1471686026, now seen corresponding path program 1 times [2020-12-22 07:39:44,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:39:44,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335490906] [2020-12-22 07:39:44,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:39:44,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:39:44,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:39:44,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335490906] [2020-12-22 07:39:44,281 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:39:44,282 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:39:44,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418336509] [2020-12-22 07:39:44,283 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:39:44,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:39:44,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:39:44,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:39:44,285 INFO L87 Difference]: Start difference. First operand 1077 states and 1739 transitions. Second operand 4 states. [2020-12-22 07:39:44,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:39:44,442 INFO L93 Difference]: Finished difference Result 3138 states and 5142 transitions. [2020-12-22 07:39:44,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:39:44,443 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 73 [2020-12-22 07:39:44,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:39:44,455 INFO L225 Difference]: With dead ends: 3138 [2020-12-22 07:39:44,455 INFO L226 Difference]: Without dead ends: 2121 [2020-12-22 07:39:44,457 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:39:44,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2121 states. [2020-12-22 07:39:44,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2121 to 1590. [2020-12-22 07:39:44,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1590 states. [2020-12-22 07:39:44,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1590 states to 1590 states and 2581 transitions. [2020-12-22 07:39:44,530 INFO L78 Accepts]: Start accepts. Automaton has 1590 states and 2581 transitions. Word has length 73 [2020-12-22 07:39:44,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:39:44,530 INFO L481 AbstractCegarLoop]: Abstraction has 1590 states and 2581 transitions. [2020-12-22 07:39:44,530 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:39:44,530 INFO L276 IsEmpty]: Start isEmpty. Operand 1590 states and 2581 transitions. [2020-12-22 07:39:44,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-12-22 07:39:44,532 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:39:44,532 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:39:44,532 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 07:39:44,532 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:39:44,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:39:44,533 INFO L82 PathProgramCache]: Analyzing trace with hash -131454774, now seen corresponding path program 1 times [2020-12-22 07:39:44,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:39:44,534 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182398929] [2020-12-22 07:39:44,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:39:44,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:39:44,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:39:44,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182398929] [2020-12-22 07:39:44,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:39:44,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:39:44,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100942311] [2020-12-22 07:39:44,598 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:39:44,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:39:44,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:39:44,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:39:44,599 INFO L87 Difference]: Start difference. First operand 1590 states and 2581 transitions. Second operand 4 states. [2020-12-22 07:39:44,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:39:44,769 INFO L93 Difference]: Finished difference Result 4612 states and 7546 transitions. [2020-12-22 07:39:44,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:39:44,770 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 74 [2020-12-22 07:39:44,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:39:44,786 INFO L225 Difference]: With dead ends: 4612 [2020-12-22 07:39:44,786 INFO L226 Difference]: Without dead ends: 3082 [2020-12-22 07:39:44,790 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:39:44,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3082 states. [2020-12-22 07:39:44,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3082 to 2324. [2020-12-22 07:39:44,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2324 states. [2020-12-22 07:39:44,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2324 states to 2324 states and 3771 transitions. [2020-12-22 07:39:44,922 INFO L78 Accepts]: Start accepts. Automaton has 2324 states and 3771 transitions. Word has length 74 [2020-12-22 07:39:44,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:39:44,922 INFO L481 AbstractCegarLoop]: Abstraction has 2324 states and 3771 transitions. [2020-12-22 07:39:44,923 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:39:44,923 INFO L276 IsEmpty]: Start isEmpty. Operand 2324 states and 3771 transitions. [2020-12-22 07:39:44,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-12-22 07:39:44,928 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:39:44,929 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:39:44,929 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 07:39:44,929 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:39:44,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:39:44,930 INFO L82 PathProgramCache]: Analyzing trace with hash -1364954579, now seen corresponding path program 1 times [2020-12-22 07:39:44,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:39:44,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113661442] [2020-12-22 07:39:44,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:39:44,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:39:45,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:39:45,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113661442] [2020-12-22 07:39:45,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:39:45,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:39:45,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371942992] [2020-12-22 07:39:45,041 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:39:45,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:39:45,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:39:45,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:39:45,042 INFO L87 Difference]: Start difference. First operand 2324 states and 3771 transitions. Second operand 4 states. [2020-12-22 07:39:45,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:39:45,279 INFO L93 Difference]: Finished difference Result 6704 states and 10946 transitions. [2020-12-22 07:39:45,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:39:45,279 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 75 [2020-12-22 07:39:45,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:39:45,302 INFO L225 Difference]: With dead ends: 6704 [2020-12-22 07:39:45,302 INFO L226 Difference]: Without dead ends: 4440 [2020-12-22 07:39:45,310 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:39:45,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4440 states. [2020-12-22 07:39:45,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4440 to 3366. [2020-12-22 07:39:45,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3366 states. [2020-12-22 07:39:45,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3366 states to 3366 states and 5455 transitions. [2020-12-22 07:39:45,505 INFO L78 Accepts]: Start accepts. Automaton has 3366 states and 5455 transitions. Word has length 75 [2020-12-22 07:39:45,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:39:45,505 INFO L481 AbstractCegarLoop]: Abstraction has 3366 states and 5455 transitions. [2020-12-22 07:39:45,506 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:39:45,506 INFO L276 IsEmpty]: Start isEmpty. Operand 3366 states and 5455 transitions. [2020-12-22 07:39:45,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-22 07:39:45,508 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:39:45,508 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:39:45,508 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 07:39:45,509 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:39:45,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:39:45,509 INFO L82 PathProgramCache]: Analyzing trace with hash 915332421, now seen corresponding path program 1 times [2020-12-22 07:39:45,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:39:45,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024565680] [2020-12-22 07:39:45,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:39:45,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:39:45,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:39:45,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024565680] [2020-12-22 07:39:45,569 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:39:45,569 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:39:45,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270361666] [2020-12-22 07:39:45,570 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:39:45,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:39:45,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:39:45,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:39:45,574 INFO L87 Difference]: Start difference. First operand 3366 states and 5455 transitions. Second operand 3 states. [2020-12-22 07:39:45,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:39:45,727 INFO L93 Difference]: Finished difference Result 7652 states and 12412 transitions. [2020-12-22 07:39:45,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:39:45,729 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 76 [2020-12-22 07:39:45,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:39:45,757 INFO L225 Difference]: With dead ends: 7652 [2020-12-22 07:39:45,757 INFO L226 Difference]: Without dead ends: 5262 [2020-12-22 07:39:45,763 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:39:45,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5262 states. [2020-12-22 07:39:46,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5262 to 5260. [2020-12-22 07:39:46,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5260 states. [2020-12-22 07:39:46,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5260 states to 5260 states and 8462 transitions. [2020-12-22 07:39:46,083 INFO L78 Accepts]: Start accepts. Automaton has 5260 states and 8462 transitions. Word has length 76 [2020-12-22 07:39:46,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:39:46,084 INFO L481 AbstractCegarLoop]: Abstraction has 5260 states and 8462 transitions. [2020-12-22 07:39:46,084 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:39:46,085 INFO L276 IsEmpty]: Start isEmpty. Operand 5260 states and 8462 transitions. [2020-12-22 07:39:46,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-22 07:39:46,087 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:39:46,088 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:39:46,088 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 07:39:46,088 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:39:46,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:39:46,089 INFO L82 PathProgramCache]: Analyzing trace with hash -318395451, now seen corresponding path program 1 times [2020-12-22 07:39:46,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:39:46,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084990339] [2020-12-22 07:39:46,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:39:46,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:39:46,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:39:46,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084990339] [2020-12-22 07:39:46,177 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:39:46,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:39:46,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027759711] [2020-12-22 07:39:46,178 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:39:46,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:39:46,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:39:46,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:39:46,181 INFO L87 Difference]: Start difference. First operand 5260 states and 8462 transitions. Second operand 3 states. [2020-12-22 07:39:46,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:39:46,504 INFO L93 Difference]: Finished difference Result 11472 states and 18516 transitions. [2020-12-22 07:39:46,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:39:46,505 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 76 [2020-12-22 07:39:46,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:39:46,563 INFO L225 Difference]: With dead ends: 11472 [2020-12-22 07:39:46,563 INFO L226 Difference]: Without dead ends: 7772 [2020-12-22 07:39:46,570 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:39:46,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7772 states. [2020-12-22 07:39:46,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7772 to 7770. [2020-12-22 07:39:46,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7770 states. [2020-12-22 07:39:46,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7770 states to 7770 states and 12446 transitions. [2020-12-22 07:39:46,974 INFO L78 Accepts]: Start accepts. Automaton has 7770 states and 12446 transitions. Word has length 76 [2020-12-22 07:39:46,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:39:46,974 INFO L481 AbstractCegarLoop]: Abstraction has 7770 states and 12446 transitions. [2020-12-22 07:39:46,974 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:39:46,974 INFO L276 IsEmpty]: Start isEmpty. Operand 7770 states and 12446 transitions. [2020-12-22 07:39:46,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-22 07:39:46,975 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:39:46,976 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:39:46,976 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 07:39:46,976 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:39:46,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:39:46,977 INFO L82 PathProgramCache]: Analyzing trace with hash 700947013, now seen corresponding path program 1 times [2020-12-22 07:39:46,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:39:46,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201318044] [2020-12-22 07:39:46,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:39:46,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:39:47,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:39:47,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201318044] [2020-12-22 07:39:47,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:39:47,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:39:47,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636460874] [2020-12-22 07:39:47,034 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:39:47,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:39:47,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:39:47,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:39:47,035 INFO L87 Difference]: Start difference. First operand 7770 states and 12446 transitions. Second operand 3 states. [2020-12-22 07:39:47,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:39:47,463 INFO L93 Difference]: Finished difference Result 17197 states and 27794 transitions. [2020-12-22 07:39:47,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:39:47,464 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 76 [2020-12-22 07:39:47,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:39:47,497 INFO L225 Difference]: With dead ends: 17197 [2020-12-22 07:39:47,497 INFO L226 Difference]: Without dead ends: 11540 [2020-12-22 07:39:47,508 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:39:47,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11540 states. [2020-12-22 07:39:48,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11540 to 11538. [2020-12-22 07:39:48,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11538 states. [2020-12-22 07:39:48,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11538 states to 11538 states and 18443 transitions. [2020-12-22 07:39:48,122 INFO L78 Accepts]: Start accepts. Automaton has 11538 states and 18443 transitions. Word has length 76 [2020-12-22 07:39:48,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:39:48,122 INFO L481 AbstractCegarLoop]: Abstraction has 11538 states and 18443 transitions. [2020-12-22 07:39:48,122 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:39:48,123 INFO L276 IsEmpty]: Start isEmpty. Operand 11538 states and 18443 transitions. [2020-12-22 07:39:48,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 07:39:48,124 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:39:48,124 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:39:48,124 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 07:39:48,125 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:39:48,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:39:48,126 INFO L82 PathProgramCache]: Analyzing trace with hash 411123109, now seen corresponding path program 1 times [2020-12-22 07:39:48,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:39:48,127 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899857777] [2020-12-22 07:39:48,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:39:48,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:39:48,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:39:48,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899857777] [2020-12-22 07:39:48,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:39:48,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:39:48,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779745075] [2020-12-22 07:39:48,308 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:39:48,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:39:48,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:39:48,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:39:48,310 INFO L87 Difference]: Start difference. First operand 11538 states and 18443 transitions. Second operand 4 states. [2020-12-22 07:39:49,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:39:49,309 INFO L93 Difference]: Finished difference Result 34109 states and 54457 transitions. [2020-12-22 07:39:49,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:39:49,310 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 77 [2020-12-22 07:39:49,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:39:49,366 INFO L225 Difference]: With dead ends: 34109 [2020-12-22 07:39:49,366 INFO L226 Difference]: Without dead ends: 22580 [2020-12-22 07:39:49,387 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:39:49,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22580 states. [2020-12-22 07:39:50,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22580 to 22578. [2020-12-22 07:39:50,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22578 states. [2020-12-22 07:39:50,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22578 states to 22578 states and 35802 transitions. [2020-12-22 07:39:50,552 INFO L78 Accepts]: Start accepts. Automaton has 22578 states and 35802 transitions. Word has length 77 [2020-12-22 07:39:50,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:39:50,552 INFO L481 AbstractCegarLoop]: Abstraction has 22578 states and 35802 transitions. [2020-12-22 07:39:50,552 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:39:50,553 INFO L276 IsEmpty]: Start isEmpty. Operand 22578 states and 35802 transitions. [2020-12-22 07:39:50,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 07:39:50,555 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:39:50,555 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:39:50,556 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 07:39:50,556 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:39:50,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:39:50,557 INFO L82 PathProgramCache]: Analyzing trace with hash 1502774817, now seen corresponding path program 1 times [2020-12-22 07:39:50,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:39:50,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995771435] [2020-12-22 07:39:50,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:39:50,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:39:50,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:39:50,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995771435] [2020-12-22 07:39:50,618 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:39:50,619 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:39:50,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219370632] [2020-12-22 07:39:50,619 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:39:50,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:39:50,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:39:50,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:39:50,621 INFO L87 Difference]: Start difference. First operand 22578 states and 35802 transitions. Second operand 3 states. [2020-12-22 07:39:51,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:39:51,758 INFO L93 Difference]: Finished difference Result 54911 states and 87576 transitions. [2020-12-22 07:39:51,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:39:51,758 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 78 [2020-12-22 07:39:51,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:39:51,870 INFO L225 Difference]: With dead ends: 54911 [2020-12-22 07:39:51,870 INFO L226 Difference]: Without dead ends: 32462 [2020-12-22 07:39:51,901 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:39:51,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32462 states. [2020-12-22 07:39:53,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32462 to 31186. [2020-12-22 07:39:53,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31186 states. [2020-12-22 07:39:53,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31186 states to 31186 states and 49355 transitions. [2020-12-22 07:39:53,446 INFO L78 Accepts]: Start accepts. Automaton has 31186 states and 49355 transitions. Word has length 78 [2020-12-22 07:39:53,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:39:53,446 INFO L481 AbstractCegarLoop]: Abstraction has 31186 states and 49355 transitions. [2020-12-22 07:39:53,446 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:39:53,446 INFO L276 IsEmpty]: Start isEmpty. Operand 31186 states and 49355 transitions. [2020-12-22 07:39:53,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 07:39:53,448 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:39:53,448 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:39:53,448 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 07:39:53,448 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:39:53,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:39:53,450 INFO L82 PathProgramCache]: Analyzing trace with hash -225322511, now seen corresponding path program 1 times [2020-12-22 07:39:53,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:39:53,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393171188] [2020-12-22 07:39:53,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:39:53,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:39:53,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:39:53,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393171188] [2020-12-22 07:39:53,485 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:39:53,485 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:39:53,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862277185] [2020-12-22 07:39:53,486 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:39:53,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:39:53,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:39:53,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:39:53,487 INFO L87 Difference]: Start difference. First operand 31186 states and 49355 transitions. Second operand 3 states. [2020-12-22 07:39:55,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:39:55,200 INFO L93 Difference]: Finished difference Result 93520 states and 148003 transitions. [2020-12-22 07:39:55,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:39:55,200 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 78 [2020-12-22 07:39:55,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:39:55,380 INFO L225 Difference]: With dead ends: 93520 [2020-12-22 07:39:55,380 INFO L226 Difference]: Without dead ends: 62362 [2020-12-22 07:39:55,433 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:39:55,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62362 states. [2020-12-22 07:39:57,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62362 to 31188. [2020-12-22 07:39:57,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31188 states. [2020-12-22 07:39:57,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31188 states to 31188 states and 49357 transitions. [2020-12-22 07:39:57,196 INFO L78 Accepts]: Start accepts. Automaton has 31188 states and 49357 transitions. Word has length 78 [2020-12-22 07:39:57,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:39:57,196 INFO L481 AbstractCegarLoop]: Abstraction has 31188 states and 49357 transitions. [2020-12-22 07:39:57,196 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:39:57,196 INFO L276 IsEmpty]: Start isEmpty. Operand 31188 states and 49357 transitions. [2020-12-22 07:39:57,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 07:39:57,198 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:39:57,198 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:39:57,198 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 07:39:57,198 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:39:57,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:39:57,199 INFO L82 PathProgramCache]: Analyzing trace with hash -577611119, now seen corresponding path program 1 times [2020-12-22 07:39:57,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:39:57,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976024999] [2020-12-22 07:39:57,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:39:57,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:39:57,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:39:57,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976024999] [2020-12-22 07:39:57,316 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:39:57,316 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:39:57,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157956178] [2020-12-22 07:39:57,317 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:39:57,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:39:57,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:39:57,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:39:57,318 INFO L87 Difference]: Start difference. First operand 31188 states and 49357 transitions. Second operand 4 states. [2020-12-22 07:39:59,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:39:59,104 INFO L93 Difference]: Finished difference Result 92206 states and 145749 transitions. [2020-12-22 07:39:59,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:39:59,105 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 79 [2020-12-22 07:39:59,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:39:59,236 INFO L225 Difference]: With dead ends: 92206 [2020-12-22 07:39:59,236 INFO L226 Difference]: Without dead ends: 61048 [2020-12-22 07:39:59,287 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:39:59,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61048 states. [2020-12-22 07:40:01,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61048 to 61046. [2020-12-22 07:40:01,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61046 states. [2020-12-22 07:40:01,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61046 states to 61046 states and 95880 transitions. [2020-12-22 07:40:01,573 INFO L78 Accepts]: Start accepts. Automaton has 61046 states and 95880 transitions. Word has length 79 [2020-12-22 07:40:01,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:40:01,574 INFO L481 AbstractCegarLoop]: Abstraction has 61046 states and 95880 transitions. [2020-12-22 07:40:01,574 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:40:01,574 INFO L276 IsEmpty]: Start isEmpty. Operand 61046 states and 95880 transitions. [2020-12-22 07:40:01,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 07:40:01,576 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:40:01,576 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:40:01,576 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 07:40:01,576 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:40:01,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:40:01,577 INFO L82 PathProgramCache]: Analyzing trace with hash -1003564987, now seen corresponding path program 1 times [2020-12-22 07:40:01,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:40:01,578 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786665645] [2020-12-22 07:40:01,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:40:01,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:40:01,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:40:01,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786665645] [2020-12-22 07:40:01,634 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:40:01,634 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:40:01,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852486270] [2020-12-22 07:40:01,635 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:40:01,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:40:01,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:40:01,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:40:01,636 INFO L87 Difference]: Start difference. First operand 61046 states and 95880 transitions. Second operand 3 states. [2020-12-22 07:40:04,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:40:04,758 INFO L93 Difference]: Finished difference Result 148150 states and 233536 transitions. [2020-12-22 07:40:04,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:40:04,759 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 80 [2020-12-22 07:40:04,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:40:04,914 INFO L225 Difference]: With dead ends: 148150 [2020-12-22 07:40:04,916 INFO L226 Difference]: Without dead ends: 87384 [2020-12-22 07:40:04,975 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:40:05,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87384 states. [2020-12-22 07:40:07,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87384 to 84054. [2020-12-22 07:40:07,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84054 states. [2020-12-22 07:40:08,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84054 states to 84054 states and 131502 transitions. [2020-12-22 07:40:08,080 INFO L78 Accepts]: Start accepts. Automaton has 84054 states and 131502 transitions. Word has length 80 [2020-12-22 07:40:08,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:40:08,080 INFO L481 AbstractCegarLoop]: Abstraction has 84054 states and 131502 transitions. [2020-12-22 07:40:08,080 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:40:08,080 INFO L276 IsEmpty]: Start isEmpty. Operand 84054 states and 131502 transitions. [2020-12-22 07:40:08,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 07:40:08,082 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:40:08,082 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:40:08,082 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 07:40:08,082 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:40:08,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:40:08,083 INFO L82 PathProgramCache]: Analyzing trace with hash -1064997795, now seen corresponding path program 1 times [2020-12-22 07:40:08,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:40:08,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583137945] [2020-12-22 07:40:08,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:40:08,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:40:08,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:40:08,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583137945] [2020-12-22 07:40:08,116 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:40:08,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:40:08,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448274251] [2020-12-22 07:40:08,116 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:40:08,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:40:08,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:40:08,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:40:08,118 INFO L87 Difference]: Start difference. First operand 84054 states and 131502 transitions. Second operand 3 states. [2020-12-22 07:40:13,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:40:13,017 INFO L93 Difference]: Finished difference Result 252086 states and 394386 transitions. [2020-12-22 07:40:13,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:40:13,018 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 80 [2020-12-22 07:40:13,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:40:13,333 INFO L225 Difference]: With dead ends: 252086 [2020-12-22 07:40:13,333 INFO L226 Difference]: Without dead ends: 168076 [2020-12-22 07:40:13,406 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:40:13,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168076 states. [2020-12-22 07:40:17,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168076 to 84058. [2020-12-22 07:40:17,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84058 states. [2020-12-22 07:40:17,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84058 states to 84058 states and 131506 transitions. [2020-12-22 07:40:17,339 INFO L78 Accepts]: Start accepts. Automaton has 84058 states and 131506 transitions. Word has length 80 [2020-12-22 07:40:17,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:40:17,340 INFO L481 AbstractCegarLoop]: Abstraction has 84058 states and 131506 transitions. [2020-12-22 07:40:17,340 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:40:17,340 INFO L276 IsEmpty]: Start isEmpty. Operand 84058 states and 131506 transitions. [2020-12-22 07:40:17,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 07:40:17,341 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:40:17,341 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:40:17,341 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 07:40:17,342 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:40:17,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:40:17,342 INFO L82 PathProgramCache]: Analyzing trace with hash 1530707325, now seen corresponding path program 1 times [2020-12-22 07:40:17,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:40:17,343 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785820871] [2020-12-22 07:40:17,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:40:17,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:40:17,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:40:17,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785820871] [2020-12-22 07:40:17,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:40:17,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:40:17,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335432552] [2020-12-22 07:40:17,445 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:40:17,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:40:17,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:40:17,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:40:17,446 INFO L87 Difference]: Start difference. First operand 84058 states and 131506 transitions. Second operand 4 states. [2020-12-22 07:40:23,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:40:23,153 INFO L93 Difference]: Finished difference Result 248426 states and 388114 transitions. [2020-12-22 07:40:23,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:40:23,153 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 81 [2020-12-22 07:40:23,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:40:23,647 INFO L225 Difference]: With dead ends: 248426 [2020-12-22 07:40:23,648 INFO L226 Difference]: Without dead ends: 164416 [2020-12-22 07:40:23,711 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:40:23,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164416 states. [2020-12-22 07:40:29,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164416 to 164414. [2020-12-22 07:40:29,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164414 states. [2020-12-22 07:40:30,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164414 states to 164414 states and 255112 transitions. [2020-12-22 07:40:30,149 INFO L78 Accepts]: Start accepts. Automaton has 164414 states and 255112 transitions. Word has length 81 [2020-12-22 07:40:30,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:40:30,149 INFO L481 AbstractCegarLoop]: Abstraction has 164414 states and 255112 transitions. [2020-12-22 07:40:30,149 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:40:30,149 INFO L276 IsEmpty]: Start isEmpty. Operand 164414 states and 255112 transitions. [2020-12-22 07:40:30,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 07:40:30,151 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:40:30,152 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:40:30,152 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 07:40:30,152 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:40:30,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:40:30,153 INFO L82 PathProgramCache]: Analyzing trace with hash -1063976855, now seen corresponding path program 1 times [2020-12-22 07:40:30,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:40:30,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434261052] [2020-12-22 07:40:30,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:40:30,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:40:30,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:40:30,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434261052] [2020-12-22 07:40:30,210 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:40:30,210 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:40:30,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444877102] [2020-12-22 07:40:30,211 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:40:30,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:40:30,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:40:30,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:40:30,212 INFO L87 Difference]: Start difference. First operand 164414 states and 255112 transitions. Second operand 3 states. [2020-12-22 07:40:38,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:40:38,387 INFO L93 Difference]: Finished difference Result 399850 states and 623434 transitions. [2020-12-22 07:40:38,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:40:38,388 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 82 [2020-12-22 07:40:38,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:40:39,132 INFO L225 Difference]: With dead ends: 399850 [2020-12-22 07:40:39,132 INFO L226 Difference]: Without dead ends: 236000 [2020-12-22 07:40:39,235 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:40:39,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236000 states. [2020-12-22 07:40:48,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236000 to 225918. [2020-12-22 07:40:48,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225918 states. [2020-12-22 07:40:48,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225918 states to 225918 states and 348560 transitions. [2020-12-22 07:40:48,599 INFO L78 Accepts]: Start accepts. Automaton has 225918 states and 348560 transitions. Word has length 82 [2020-12-22 07:40:48,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:40:48,599 INFO L481 AbstractCegarLoop]: Abstraction has 225918 states and 348560 transitions. [2020-12-22 07:40:48,599 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:40:48,600 INFO L276 IsEmpty]: Start isEmpty. Operand 225918 states and 348560 transitions. [2020-12-22 07:40:48,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 07:40:48,602 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:40:48,602 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:40:48,602 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 07:40:48,603 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:40:48,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:40:48,603 INFO L82 PathProgramCache]: Analyzing trace with hash -1085594423, now seen corresponding path program 1 times [2020-12-22 07:40:48,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:40:48,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913948655] [2020-12-22 07:40:48,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:40:48,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:40:49,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:40:49,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913948655] [2020-12-22 07:40:49,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:40:49,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:40:49,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184675230] [2020-12-22 07:40:49,034 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:40:49,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:40:49,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:40:49,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:40:49,036 INFO L87 Difference]: Start difference. First operand 225918 states and 348560 transitions. Second operand 3 states. [2020-12-22 07:41:03,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:41:03,642 INFO L93 Difference]: Finished difference Result 677330 states and 1045134 transitions. [2020-12-22 07:41:03,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:41:03,643 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 82 [2020-12-22 07:41:03,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:41:04,657 INFO L225 Difference]: With dead ends: 677330 [2020-12-22 07:41:04,657 INFO L226 Difference]: Without dead ends: 451744 [2020-12-22 07:41:04,869 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:41:05,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451744 states. [2020-12-22 07:41:16,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451744 to 225926. [2020-12-22 07:41:16,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225926 states. [2020-12-22 07:41:17,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225926 states to 225926 states and 348568 transitions. [2020-12-22 07:41:17,054 INFO L78 Accepts]: Start accepts. Automaton has 225926 states and 348568 transitions. Word has length 82 [2020-12-22 07:41:17,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:41:17,054 INFO L481 AbstractCegarLoop]: Abstraction has 225926 states and 348568 transitions. [2020-12-22 07:41:17,055 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:41:17,055 INFO L276 IsEmpty]: Start isEmpty. Operand 225926 states and 348568 transitions. [2020-12-22 07:41:17,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 07:41:17,057 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:41:17,057 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:41:17,057 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 07:41:17,058 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:41:17,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:41:17,058 INFO L82 PathProgramCache]: Analyzing trace with hash 762927108, now seen corresponding path program 1 times [2020-12-22 07:41:17,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:41:17,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769705747] [2020-12-22 07:41:17,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:41:17,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:41:17,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:41:17,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769705747] [2020-12-22 07:41:17,212 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:41:17,212 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:41:17,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407226921] [2020-12-22 07:41:17,213 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:41:17,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:41:17,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:41:17,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:41:17,214 INFO L87 Difference]: Start difference. First operand 225926 states and 348568 transitions. Second operand 5 states. [2020-12-22 07:41:33,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:41:34,000 INFO L93 Difference]: Finished difference Result 639120 states and 985393 transitions. [2020-12-22 07:41:34,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:41:34,009 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 83 [2020-12-22 07:41:34,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:41:35,201 INFO L225 Difference]: With dead ends: 639120 [2020-12-22 07:41:35,201 INFO L226 Difference]: Without dead ends: 413282 [2020-12-22 07:41:35,410 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:41:35,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413282 states. [2020-12-22 07:41:53,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413282 to 413280. [2020-12-22 07:41:53,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 413280 states. [2020-12-22 07:41:55,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413280 states to 413280 states and 631969 transitions. [2020-12-22 07:41:55,270 INFO L78 Accepts]: Start accepts. Automaton has 413280 states and 631969 transitions. Word has length 83 [2020-12-22 07:41:55,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:41:55,273 INFO L481 AbstractCegarLoop]: Abstraction has 413280 states and 631969 transitions. [2020-12-22 07:41:55,273 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:41:55,274 INFO L276 IsEmpty]: Start isEmpty. Operand 413280 states and 631969 transitions. [2020-12-22 07:41:55,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 07:41:55,290 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:41:55,290 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:41:55,291 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 07:41:55,291 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:41:55,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:41:55,295 INFO L82 PathProgramCache]: Analyzing trace with hash 1633117801, now seen corresponding path program 1 times [2020-12-22 07:41:55,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:41:55,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377536627] [2020-12-22 07:41:55,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:41:55,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:41:55,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:41:55,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377536627] [2020-12-22 07:41:55,461 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:41:55,462 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:41:55,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145117394] [2020-12-22 07:41:55,465 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:41:55,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:41:55,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:41:55,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:41:55,467 INFO L87 Difference]: Start difference. First operand 413280 states and 631969 transitions. Second operand 4 states. [2020-12-22 07:42:10,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:42:10,680 INFO L93 Difference]: Finished difference Result 734762 states and 1121587 transitions. [2020-12-22 07:42:10,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:42:10,680 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 83 [2020-12-22 07:42:10,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:42:11,454 INFO L225 Difference]: With dead ends: 734762 [2020-12-22 07:42:11,454 INFO L226 Difference]: Without dead ends: 321556 [2020-12-22 07:42:11,727 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:42:12,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321556 states. [2020-12-22 07:42:26,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321556 to 321556. [2020-12-22 07:42:26,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 321556 states. [2020-12-22 07:42:27,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321556 states to 321556 states and 489721 transitions. [2020-12-22 07:42:27,292 INFO L78 Accepts]: Start accepts. Automaton has 321556 states and 489721 transitions. Word has length 83 [2020-12-22 07:42:27,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:42:27,292 INFO L481 AbstractCegarLoop]: Abstraction has 321556 states and 489721 transitions. [2020-12-22 07:42:27,293 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:42:27,293 INFO L276 IsEmpty]: Start isEmpty. Operand 321556 states and 489721 transitions. [2020-12-22 07:42:27,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-22 07:42:27,295 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:42:27,295 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:42:27,295 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 07:42:27,296 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:42:27,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:42:27,296 INFO L82 PathProgramCache]: Analyzing trace with hash 960344718, now seen corresponding path program 1 times [2020-12-22 07:42:27,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:42:27,296 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712999390] [2020-12-22 07:42:27,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:42:27,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:42:27,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:42:27,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712999390] [2020-12-22 07:42:27,395 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:42:27,396 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:42:27,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486609121] [2020-12-22 07:42:27,396 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:42:27,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:42:27,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:42:27,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:42:27,397 INFO L87 Difference]: Start difference. First operand 321556 states and 489721 transitions. Second operand 4 states. [2020-12-22 07:42:52,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:42:52,285 INFO L93 Difference]: Finished difference Result 845180 states and 1286070 transitions. [2020-12-22 07:42:52,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:42:52,286 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 84 [2020-12-22 07:42:52,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:42:53,575 INFO L225 Difference]: With dead ends: 845180 [2020-12-22 07:42:53,576 INFO L226 Difference]: Without dead ends: 523756 [2020-12-22 07:42:53,842 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:42:54,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523756 states.