/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/combinations/pals_lcr.5.ufo.BOUNDED-10.pals+Problem12_label02.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 09:53:44,420 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 09:53:44,423 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 09:53:44,476 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 09:53:44,477 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 09:53:44,481 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 09:53:44,485 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 09:53:44,494 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 09:53:44,497 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 09:53:44,505 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 09:53:44,507 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 09:53:44,508 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 09:53:44,509 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 09:53:44,512 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 09:53:44,514 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 09:53:44,516 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 09:53:44,517 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 09:53:44,522 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 09:53:44,530 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 09:53:44,535 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 09:53:44,541 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 09:53:44,543 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 09:53:44,545 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 09:53:44,563 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 09:53:44,571 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 09:53:44,589 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 09:53:44,590 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 09:53:44,591 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 09:53:44,592 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 09:53:44,654 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 09:53:44,654 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 09:53:44,660 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 09:53:44,661 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 09:53:44,661 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 09:53:44,661 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 09:53:44,661 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 09:53:44,661 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 09:53:44,662 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 09:53:44,662 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 09:53:44,664 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 09:53:44,664 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 09:53:44,664 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 09:53:44,665 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 09:53:44,665 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 09:53:44,665 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 09:53:44,665 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 09:53:44,665 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 09:53:44,666 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 09:53:44,666 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 09:53:44,666 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 09:53:44,667 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 09:53:44,667 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 09:53:44,667 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 09:53:44,667 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 09:53:44,668 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 09:53:45,119 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 09:53:45,151 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 09:53:45,155 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 09:53:45,156 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 09:53:45,157 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 09:53:45,158 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.5.ufo.BOUNDED-10.pals+Problem12_label02.c [2020-12-22 09:53:45,250 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a8df41701/21233bacc9714817bd0dcc660264bf1c/FLAG765b3f8a3 [2020-12-22 09:53:46,448 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 09:53:46,449 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.5.ufo.BOUNDED-10.pals+Problem12_label02.c [2020-12-22 09:53:46,502 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a8df41701/21233bacc9714817bd0dcc660264bf1c/FLAG765b3f8a3 [2020-12-22 09:53:46,854 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a8df41701/21233bacc9714817bd0dcc660264bf1c [2020-12-22 09:53:46,859 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 09:53:46,862 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 09:53:46,866 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 09:53:46,866 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 09:53:46,870 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 09:53:46,871 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:53:46" (1/1) ... [2020-12-22 09:53:46,874 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3bad142c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:53:46, skipping insertion in model container [2020-12-22 09:53:46,874 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:53:46" (1/1) ... [2020-12-22 09:53:46,888 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 09:53:47,062 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 09:53:47,511 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.5.ufo.BOUNDED-10.pals+Problem12_label02.c[11730,11743] [2020-12-22 09:53:47,600 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.5.ufo.BOUNDED-10.pals+Problem12_label02.c[18777,18790] [2020-12-22 09:53:48,570 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:53:48,583 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 09:53:48,620 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.5.ufo.BOUNDED-10.pals+Problem12_label02.c[11730,11743] [2020-12-22 09:53:48,632 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.5.ufo.BOUNDED-10.pals+Problem12_label02.c[18777,18790] [2020-12-22 09:53:49,217 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:53:49,263 INFO L208 MainTranslator]: Completed translation [2020-12-22 09:53:49,263 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:53:49 WrapperNode [2020-12-22 09:53:49,264 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 09:53:49,267 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 09:53:49,267 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 09:53:49,267 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 09:53:49,278 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:53:49" (1/1) ... [2020-12-22 09:53:49,368 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:53:49" (1/1) ... [2020-12-22 09:53:49,823 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 09:53:49,824 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 09:53:49,824 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 09:53:49,824 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 09:53:49,835 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:53:49" (1/1) ... [2020-12-22 09:53:49,836 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:53:49" (1/1) ... [2020-12-22 09:53:49,894 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:53:49" (1/1) ... [2020-12-22 09:53:49,895 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:53:49" (1/1) ... [2020-12-22 09:53:50,153 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:53:49" (1/1) ... [2020-12-22 09:53:50,194 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:53:49" (1/1) ... [2020-12-22 09:53:50,393 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:53:49" (1/1) ... [2020-12-22 09:53:50,505 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 09:53:50,507 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 09:53:50,507 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 09:53:50,507 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 09:53:50,509 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:53:49" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 09:53:50,622 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 09:53:50,623 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 09:53:50,623 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 09:53:50,623 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 09:53:56,392 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 09:53:56,393 INFO L299 CfgBuilder]: Removed 36 assume(true) statements. [2020-12-22 09:53:56,399 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:53:56 BoogieIcfgContainer [2020-12-22 09:53:56,400 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 09:53:56,403 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 09:53:56,406 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 09:53:56,410 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 09:53:56,411 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 09:53:46" (1/3) ... [2020-12-22 09:53:56,412 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ca9ee13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:53:56, skipping insertion in model container [2020-12-22 09:53:56,412 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:53:49" (2/3) ... [2020-12-22 09:53:56,413 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ca9ee13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:53:56, skipping insertion in model container [2020-12-22 09:53:56,413 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:53:56" (3/3) ... [2020-12-22 09:53:56,415 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.5.ufo.BOUNDED-10.pals+Problem12_label02.c [2020-12-22 09:53:56,424 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 09:53:56,432 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 09:53:56,451 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 09:53:56,508 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 09:53:56,509 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 09:53:56,509 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 09:53:56,509 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 09:53:56,509 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 09:53:56,509 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 09:53:56,510 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 09:53:56,510 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 09:53:56,559 INFO L276 IsEmpty]: Start isEmpty. Operand 909 states. [2020-12-22 09:53:56,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-22 09:53:56,573 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:53:56,574 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:53:56,575 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:53:56,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:53:56,582 INFO L82 PathProgramCache]: Analyzing trace with hash -441366565, now seen corresponding path program 1 times [2020-12-22 09:53:56,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:53:56,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457571735] [2020-12-22 09:53:56,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:53:56,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:53:56,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:53:56,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457571735] [2020-12-22 09:53:56,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:53:56,883 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 09:53:56,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318783338] [2020-12-22 09:53:56,888 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 09:53:56,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:53:56,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 09:53:56,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 09:53:56,906 INFO L87 Difference]: Start difference. First operand 909 states. Second operand 2 states. [2020-12-22 09:53:56,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:53:56,992 INFO L93 Difference]: Finished difference Result 1781 states and 3374 transitions. [2020-12-22 09:53:56,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 09:53:56,994 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 34 [2020-12-22 09:53:56,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:53:57,020 INFO L225 Difference]: With dead ends: 1781 [2020-12-22 09:53:57,021 INFO L226 Difference]: Without dead ends: 843 [2020-12-22 09:53:57,028 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 09:53:57,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 843 states. [2020-12-22 09:53:57,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 843 to 843. [2020-12-22 09:53:57,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 843 states. [2020-12-22 09:53:57,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 843 states to 843 states and 1589 transitions. [2020-12-22 09:53:57,180 INFO L78 Accepts]: Start accepts. Automaton has 843 states and 1589 transitions. Word has length 34 [2020-12-22 09:53:57,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:53:57,181 INFO L481 AbstractCegarLoop]: Abstraction has 843 states and 1589 transitions. [2020-12-22 09:53:57,181 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 09:53:57,183 INFO L276 IsEmpty]: Start isEmpty. Operand 843 states and 1589 transitions. [2020-12-22 09:53:57,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-22 09:53:57,187 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:53:57,187 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:53:57,188 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 09:53:57,189 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:53:57,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:53:57,189 INFO L82 PathProgramCache]: Analyzing trace with hash -950839655, now seen corresponding path program 1 times [2020-12-22 09:53:57,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:53:57,190 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564788660] [2020-12-22 09:53:57,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:53:57,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:53:57,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:53:57,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564788660] [2020-12-22 09:53:57,379 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:53:57,379 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:53:57,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007837467] [2020-12-22 09:53:57,384 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:53:57,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:53:57,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:53:57,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:53:57,385 INFO L87 Difference]: Start difference. First operand 843 states and 1589 transitions. Second operand 5 states. [2020-12-22 09:53:57,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:53:57,544 INFO L93 Difference]: Finished difference Result 899 states and 1675 transitions. [2020-12-22 09:53:57,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:53:57,545 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2020-12-22 09:53:57,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:53:57,554 INFO L225 Difference]: With dead ends: 899 [2020-12-22 09:53:57,554 INFO L226 Difference]: Without dead ends: 843 [2020-12-22 09:53:57,556 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:53:57,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 843 states. [2020-12-22 09:53:57,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 843 to 843. [2020-12-22 09:53:57,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 843 states. [2020-12-22 09:53:57,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 843 states to 843 states and 1558 transitions. [2020-12-22 09:53:57,585 INFO L78 Accepts]: Start accepts. Automaton has 843 states and 1558 transitions. Word has length 34 [2020-12-22 09:53:57,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:53:57,586 INFO L481 AbstractCegarLoop]: Abstraction has 843 states and 1558 transitions. [2020-12-22 09:53:57,586 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:53:57,586 INFO L276 IsEmpty]: Start isEmpty. Operand 843 states and 1558 transitions. [2020-12-22 09:53:57,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 09:53:57,589 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:53:57,589 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:53:57,589 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 09:53:57,589 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:53:57,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:53:57,590 INFO L82 PathProgramCache]: Analyzing trace with hash 383168621, now seen corresponding path program 1 times [2020-12-22 09:53:57,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:53:57,591 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751106926] [2020-12-22 09:53:57,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:53:57,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:53:57,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:53:57,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751106926] [2020-12-22 09:53:57,900 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:53:57,901 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:53:57,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932628314] [2020-12-22 09:53:57,903 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:53:57,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:53:57,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:53:57,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:53:57,909 INFO L87 Difference]: Start difference. First operand 843 states and 1558 transitions. Second operand 4 states. [2020-12-22 09:54:09,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:54:09,053 INFO L93 Difference]: Finished difference Result 3098 states and 5867 transitions. [2020-12-22 09:54:09,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:54:09,054 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 63 [2020-12-22 09:54:09,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:54:09,066 INFO L225 Difference]: With dead ends: 3098 [2020-12-22 09:54:09,066 INFO L226 Difference]: Without dead ends: 2345 [2020-12-22 09:54:09,068 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:54:09,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2345 states. [2020-12-22 09:54:09,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2345 to 2345. [2020-12-22 09:54:09,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2345 states. [2020-12-22 09:54:09,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2345 states to 2345 states and 3534 transitions. [2020-12-22 09:54:09,129 INFO L78 Accepts]: Start accepts. Automaton has 2345 states and 3534 transitions. Word has length 63 [2020-12-22 09:54:09,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:54:09,130 INFO L481 AbstractCegarLoop]: Abstraction has 2345 states and 3534 transitions. [2020-12-22 09:54:09,130 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:54:09,130 INFO L276 IsEmpty]: Start isEmpty. Operand 2345 states and 3534 transitions. [2020-12-22 09:54:09,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:54:09,132 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:54:09,132 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:54:09,132 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 09:54:09,133 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:54:09,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:54:09,133 INFO L82 PathProgramCache]: Analyzing trace with hash -695028240, now seen corresponding path program 1 times [2020-12-22 09:54:09,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:54:09,134 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076067695] [2020-12-22 09:54:09,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:54:09,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:54:09,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:54:09,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076067695] [2020-12-22 09:54:09,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:54:09,211 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:54:09,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642690532] [2020-12-22 09:54:09,212 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:54:09,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:54:09,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:54:09,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:54:09,213 INFO L87 Difference]: Start difference. First operand 2345 states and 3534 transitions. Second operand 3 states. [2020-12-22 09:54:09,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:54:09,262 INFO L93 Difference]: Finished difference Result 2443 states and 3688 transitions. [2020-12-22 09:54:09,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:54:09,263 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 09:54:09,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:54:09,280 INFO L225 Difference]: With dead ends: 2443 [2020-12-22 09:54:09,280 INFO L226 Difference]: Without dead ends: 2391 [2020-12-22 09:54:09,282 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:54:09,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2391 states. [2020-12-22 09:54:09,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2391 to 2389. [2020-12-22 09:54:09,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2389 states. [2020-12-22 09:54:09,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2389 states to 2389 states and 3604 transitions. [2020-12-22 09:54:09,359 INFO L78 Accepts]: Start accepts. Automaton has 2389 states and 3604 transitions. Word has length 64 [2020-12-22 09:54:09,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:54:09,359 INFO L481 AbstractCegarLoop]: Abstraction has 2389 states and 3604 transitions. [2020-12-22 09:54:09,359 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:54:09,360 INFO L276 IsEmpty]: Start isEmpty. Operand 2389 states and 3604 transitions. [2020-12-22 09:54:09,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:54:09,361 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:54:09,361 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:54:09,361 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 09:54:09,361 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:54:09,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:54:09,362 INFO L82 PathProgramCache]: Analyzing trace with hash -1440610970, now seen corresponding path program 1 times [2020-12-22 09:54:09,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:54:09,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493937886] [2020-12-22 09:54:09,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:54:09,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:54:09,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:54:09,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493937886] [2020-12-22 09:54:09,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:54:09,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:54:09,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668923612] [2020-12-22 09:54:09,439 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:54:09,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:54:09,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:54:09,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:54:09,440 INFO L87 Difference]: Start difference. First operand 2389 states and 3604 transitions. Second operand 3 states. [2020-12-22 09:54:09,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:54:09,492 INFO L93 Difference]: Finished difference Result 2569 states and 3888 transitions. [2020-12-22 09:54:09,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:54:09,493 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 09:54:09,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:54:09,509 INFO L225 Difference]: With dead ends: 2569 [2020-12-22 09:54:09,509 INFO L226 Difference]: Without dead ends: 2473 [2020-12-22 09:54:09,511 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:54:09,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2473 states. [2020-12-22 09:54:09,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2473 to 2471. [2020-12-22 09:54:09,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2471 states. [2020-12-22 09:54:09,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2471 states to 2471 states and 3733 transitions. [2020-12-22 09:54:09,583 INFO L78 Accepts]: Start accepts. Automaton has 2471 states and 3733 transitions. Word has length 64 [2020-12-22 09:54:09,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:54:09,583 INFO L481 AbstractCegarLoop]: Abstraction has 2471 states and 3733 transitions. [2020-12-22 09:54:09,584 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:54:09,584 INFO L276 IsEmpty]: Start isEmpty. Operand 2471 states and 3733 transitions. [2020-12-22 09:54:09,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:54:09,584 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:54:09,585 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:54:09,585 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 09:54:09,585 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:54:09,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:54:09,586 INFO L82 PathProgramCache]: Analyzing trace with hash 914325468, now seen corresponding path program 1 times [2020-12-22 09:54:09,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:54:09,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008449109] [2020-12-22 09:54:09,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:54:09,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:54:09,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:54:09,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008449109] [2020-12-22 09:54:09,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:54:09,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:54:09,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84926284] [2020-12-22 09:54:09,650 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:54:09,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:54:09,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:54:09,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:54:09,651 INFO L87 Difference]: Start difference. First operand 2471 states and 3733 transitions. Second operand 3 states. [2020-12-22 09:54:09,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:54:09,703 INFO L93 Difference]: Finished difference Result 2803 states and 4255 transitions. [2020-12-22 09:54:09,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:54:09,704 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 09:54:09,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:54:09,720 INFO L225 Difference]: With dead ends: 2803 [2020-12-22 09:54:09,721 INFO L226 Difference]: Without dead ends: 2625 [2020-12-22 09:54:09,723 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:54:09,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2625 states. [2020-12-22 09:54:09,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2625 to 2623. [2020-12-22 09:54:09,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2623 states. [2020-12-22 09:54:09,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2623 states to 2623 states and 3969 transitions. [2020-12-22 09:54:09,802 INFO L78 Accepts]: Start accepts. Automaton has 2623 states and 3969 transitions. Word has length 64 [2020-12-22 09:54:09,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:54:09,802 INFO L481 AbstractCegarLoop]: Abstraction has 2623 states and 3969 transitions. [2020-12-22 09:54:09,802 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:54:09,803 INFO L276 IsEmpty]: Start isEmpty. Operand 2623 states and 3969 transitions. [2020-12-22 09:54:09,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:54:09,803 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:54:09,803 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:54:09,804 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 09:54:09,804 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:54:09,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:54:09,804 INFO L82 PathProgramCache]: Analyzing trace with hash -1701027568, now seen corresponding path program 1 times [2020-12-22 09:54:09,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:54:09,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958848934] [2020-12-22 09:54:09,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:54:09,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:54:09,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:54:09,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958848934] [2020-12-22 09:54:09,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:54:09,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:54:09,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334033914] [2020-12-22 09:54:09,889 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:54:09,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:54:09,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:54:09,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:54:09,891 INFO L87 Difference]: Start difference. First operand 2623 states and 3969 transitions. Second operand 3 states. [2020-12-22 09:54:09,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:54:09,951 INFO L93 Difference]: Finished difference Result 3235 states and 4923 transitions. [2020-12-22 09:54:09,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:54:09,952 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 09:54:09,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:54:09,968 INFO L225 Difference]: With dead ends: 3235 [2020-12-22 09:54:09,968 INFO L226 Difference]: Without dead ends: 2905 [2020-12-22 09:54:09,970 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:54:09,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2905 states. [2020-12-22 09:54:10,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2905 to 2903. [2020-12-22 09:54:10,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2903 states. [2020-12-22 09:54:10,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2903 states to 2903 states and 4397 transitions. [2020-12-22 09:54:10,063 INFO L78 Accepts]: Start accepts. Automaton has 2903 states and 4397 transitions. Word has length 64 [2020-12-22 09:54:10,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:54:10,065 INFO L481 AbstractCegarLoop]: Abstraction has 2903 states and 4397 transitions. [2020-12-22 09:54:10,066 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:54:10,066 INFO L276 IsEmpty]: Start isEmpty. Operand 2903 states and 4397 transitions. [2020-12-22 09:54:10,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:54:10,067 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:54:10,067 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:54:10,067 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 09:54:10,067 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:54:10,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:54:10,068 INFO L82 PathProgramCache]: Analyzing trace with hash -1105068988, now seen corresponding path program 1 times [2020-12-22 09:54:10,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:54:10,069 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980328184] [2020-12-22 09:54:10,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:54:10,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:54:10,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:54:10,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980328184] [2020-12-22 09:54:10,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:54:10,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:54:10,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608170907] [2020-12-22 09:54:10,170 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:54:10,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:54:10,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:54:10,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:54:10,171 INFO L87 Difference]: Start difference. First operand 2903 states and 4397 transitions. Second operand 3 states. [2020-12-22 09:54:10,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:54:10,255 INFO L93 Difference]: Finished difference Result 4027 states and 6127 transitions. [2020-12-22 09:54:10,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:54:10,256 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 09:54:10,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:54:10,273 INFO L225 Difference]: With dead ends: 4027 [2020-12-22 09:54:10,274 INFO L226 Difference]: Without dead ends: 3417 [2020-12-22 09:54:10,277 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:54:10,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3417 states. [2020-12-22 09:54:10,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3417 to 3415. [2020-12-22 09:54:10,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3415 states. [2020-12-22 09:54:10,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3415 states to 3415 states and 5165 transitions. [2020-12-22 09:54:10,398 INFO L78 Accepts]: Start accepts. Automaton has 3415 states and 5165 transitions. Word has length 64 [2020-12-22 09:54:10,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:54:10,398 INFO L481 AbstractCegarLoop]: Abstraction has 3415 states and 5165 transitions. [2020-12-22 09:54:10,398 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:54:10,398 INFO L276 IsEmpty]: Start isEmpty. Operand 3415 states and 5165 transitions. [2020-12-22 09:54:10,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:54:10,399 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:54:10,399 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:54:10,399 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 09:54:10,400 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:54:10,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:54:10,400 INFO L82 PathProgramCache]: Analyzing trace with hash 112916410, now seen corresponding path program 1 times [2020-12-22 09:54:10,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:54:10,405 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560355830] [2020-12-22 09:54:10,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:54:10,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:54:10,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:54:10,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560355830] [2020-12-22 09:54:10,521 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:54:10,521 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:54:10,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997316369] [2020-12-22 09:54:10,522 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:54:10,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:54:10,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:54:10,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:54:10,523 INFO L87 Difference]: Start difference. First operand 3415 states and 5165 transitions. Second operand 7 states. [2020-12-22 09:54:11,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:54:11,265 INFO L93 Difference]: Finished difference Result 14635 states and 22295 transitions. [2020-12-22 09:54:11,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 09:54:11,266 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 64 [2020-12-22 09:54:11,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:54:11,343 INFO L225 Difference]: With dead ends: 14635 [2020-12-22 09:54:11,343 INFO L226 Difference]: Without dead ends: 13513 [2020-12-22 09:54:11,352 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-12-22 09:54:11,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13513 states. [2020-12-22 09:54:11,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13513 to 4535. [2020-12-22 09:54:11,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4535 states. [2020-12-22 09:54:11,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4535 states to 4535 states and 6813 transitions. [2020-12-22 09:54:11,771 INFO L78 Accepts]: Start accepts. Automaton has 4535 states and 6813 transitions. Word has length 64 [2020-12-22 09:54:11,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:54:11,771 INFO L481 AbstractCegarLoop]: Abstraction has 4535 states and 6813 transitions. [2020-12-22 09:54:11,771 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:54:11,772 INFO L276 IsEmpty]: Start isEmpty. Operand 4535 states and 6813 transitions. [2020-12-22 09:54:11,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:54:11,779 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:54:11,779 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:54:11,779 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 09:54:11,780 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:54:11,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:54:11,780 INFO L82 PathProgramCache]: Analyzing trace with hash -277208054, now seen corresponding path program 1 times [2020-12-22 09:54:11,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:54:11,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084761449] [2020-12-22 09:54:11,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:54:11,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:54:11,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:54:11,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084761449] [2020-12-22 09:54:11,860 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:54:11,861 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:54:11,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984754770] [2020-12-22 09:54:11,861 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:54:11,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:54:11,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:54:11,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:54:11,862 INFO L87 Difference]: Start difference. First operand 4535 states and 6813 transitions. Second operand 3 states. [2020-12-22 09:54:12,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:54:12,089 INFO L93 Difference]: Finished difference Result 7821 states and 11729 transitions. [2020-12-22 09:54:12,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:54:12,089 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 66 [2020-12-22 09:54:12,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:54:12,103 INFO L225 Difference]: With dead ends: 7821 [2020-12-22 09:54:12,103 INFO L226 Difference]: Without dead ends: 5579 [2020-12-22 09:54:12,109 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:54:12,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5579 states. [2020-12-22 09:54:12,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5579 to 5577. [2020-12-22 09:54:12,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5577 states. [2020-12-22 09:54:12,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5577 states to 5577 states and 8319 transitions. [2020-12-22 09:54:12,380 INFO L78 Accepts]: Start accepts. Automaton has 5577 states and 8319 transitions. Word has length 66 [2020-12-22 09:54:12,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:54:12,381 INFO L481 AbstractCegarLoop]: Abstraction has 5577 states and 8319 transitions. [2020-12-22 09:54:12,381 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:54:12,381 INFO L276 IsEmpty]: Start isEmpty. Operand 5577 states and 8319 transitions. [2020-12-22 09:54:12,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:54:12,382 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:54:12,382 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:54:12,382 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 09:54:12,383 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:54:12,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:54:12,383 INFO L82 PathProgramCache]: Analyzing trace with hash -210714542, now seen corresponding path program 1 times [2020-12-22 09:54:12,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:54:12,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720142847] [2020-12-22 09:54:12,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:54:12,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:54:12,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:54:12,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720142847] [2020-12-22 09:54:12,630 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:54:12,630 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:54:12,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013931344] [2020-12-22 09:54:12,631 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:54:12,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:54:12,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:54:12,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:54:12,634 INFO L87 Difference]: Start difference. First operand 5577 states and 8319 transitions. Second operand 7 states. [2020-12-22 09:54:13,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:54:13,069 INFO L93 Difference]: Finished difference Result 8861 states and 13185 transitions. [2020-12-22 09:54:13,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:54:13,070 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 66 [2020-12-22 09:54:13,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:54:13,083 INFO L225 Difference]: With dead ends: 8861 [2020-12-22 09:54:13,083 INFO L226 Difference]: Without dead ends: 5579 [2020-12-22 09:54:13,090 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2020-12-22 09:54:13,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5579 states. [2020-12-22 09:54:13,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5579 to 5577. [2020-12-22 09:54:13,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5577 states. [2020-12-22 09:54:13,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5577 states to 5577 states and 8271 transitions. [2020-12-22 09:54:13,365 INFO L78 Accepts]: Start accepts. Automaton has 5577 states and 8271 transitions. Word has length 66 [2020-12-22 09:54:13,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:54:13,365 INFO L481 AbstractCegarLoop]: Abstraction has 5577 states and 8271 transitions. [2020-12-22 09:54:13,365 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:54:13,365 INFO L276 IsEmpty]: Start isEmpty. Operand 5577 states and 8271 transitions. [2020-12-22 09:54:13,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 09:54:13,366 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:54:13,366 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:54:13,367 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 09:54:13,367 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:54:13,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:54:13,367 INFO L82 PathProgramCache]: Analyzing trace with hash 1643060746, now seen corresponding path program 1 times [2020-12-22 09:54:13,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:54:13,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641521583] [2020-12-22 09:54:13,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:54:13,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:54:13,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:54:13,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641521583] [2020-12-22 09:54:13,463 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:54:13,463 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:54:13,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641363132] [2020-12-22 09:54:13,463 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:54:13,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:54:13,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:54:13,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:54:13,464 INFO L87 Difference]: Start difference. First operand 5577 states and 8271 transitions. Second operand 6 states. [2020-12-22 09:54:13,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:54:13,818 INFO L93 Difference]: Finished difference Result 8859 states and 13088 transitions. [2020-12-22 09:54:13,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:54:13,819 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 67 [2020-12-22 09:54:13,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:54:13,830 INFO L225 Difference]: With dead ends: 8859 [2020-12-22 09:54:13,831 INFO L226 Difference]: Without dead ends: 5577 [2020-12-22 09:54:13,837 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:54:13,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5577 states. [2020-12-22 09:54:14,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5577 to 5577. [2020-12-22 09:54:14,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5577 states. [2020-12-22 09:54:14,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5577 states to 5577 states and 8223 transitions. [2020-12-22 09:54:14,235 INFO L78 Accepts]: Start accepts. Automaton has 5577 states and 8223 transitions. Word has length 67 [2020-12-22 09:54:14,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:54:14,236 INFO L481 AbstractCegarLoop]: Abstraction has 5577 states and 8223 transitions. [2020-12-22 09:54:14,236 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:54:14,236 INFO L276 IsEmpty]: Start isEmpty. Operand 5577 states and 8223 transitions. [2020-12-22 09:54:14,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 09:54:14,237 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:54:14,237 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:54:14,237 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 09:54:14,238 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:54:14,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:54:14,238 INFO L82 PathProgramCache]: Analyzing trace with hash -1372042872, now seen corresponding path program 1 times [2020-12-22 09:54:14,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:54:14,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989941383] [2020-12-22 09:54:14,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:54:14,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:54:14,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:54:14,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989941383] [2020-12-22 09:54:14,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:54:14,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:54:14,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606492082] [2020-12-22 09:54:14,347 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:54:14,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:54:14,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:54:14,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:54:14,354 INFO L87 Difference]: Start difference. First operand 5577 states and 8223 transitions. Second operand 6 states. [2020-12-22 09:54:14,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:54:14,777 INFO L93 Difference]: Finished difference Result 8859 states and 12992 transitions. [2020-12-22 09:54:14,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:54:14,778 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 67 [2020-12-22 09:54:14,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:54:14,790 INFO L225 Difference]: With dead ends: 8859 [2020-12-22 09:54:14,790 INFO L226 Difference]: Without dead ends: 5577 [2020-12-22 09:54:14,797 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:54:14,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5577 states. [2020-12-22 09:54:15,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5577 to 5577. [2020-12-22 09:54:15,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5577 states. [2020-12-22 09:54:15,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5577 states to 5577 states and 8175 transitions. [2020-12-22 09:54:15,070 INFO L78 Accepts]: Start accepts. Automaton has 5577 states and 8175 transitions. Word has length 67 [2020-12-22 09:54:15,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:54:15,071 INFO L481 AbstractCegarLoop]: Abstraction has 5577 states and 8175 transitions. [2020-12-22 09:54:15,071 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:54:15,071 INFO L276 IsEmpty]: Start isEmpty. Operand 5577 states and 8175 transitions. [2020-12-22 09:54:15,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 09:54:15,073 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:54:15,074 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:54:15,074 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 09:54:15,074 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:54:15,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:54:15,075 INFO L82 PathProgramCache]: Analyzing trace with hash 316900870, now seen corresponding path program 1 times [2020-12-22 09:54:15,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:54:15,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892870055] [2020-12-22 09:54:15,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:54:15,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:54:15,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:54:15,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892870055] [2020-12-22 09:54:15,184 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:54:15,184 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:54:15,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135096099] [2020-12-22 09:54:15,185 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:54:15,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:54:15,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:54:15,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:54:15,186 INFO L87 Difference]: Start difference. First operand 5577 states and 8175 transitions. Second operand 5 states. [2020-12-22 09:54:15,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:54:15,733 INFO L93 Difference]: Finished difference Result 8420 states and 12149 transitions. [2020-12-22 09:54:15,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:54:15,733 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 67 [2020-12-22 09:54:15,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:54:15,752 INFO L225 Difference]: With dead ends: 8420 [2020-12-22 09:54:15,752 INFO L226 Difference]: Without dead ends: 8418 [2020-12-22 09:54:15,757 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 09:54:15,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8418 states. [2020-12-22 09:54:16,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8418 to 5769. [2020-12-22 09:54:16,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5769 states. [2020-12-22 09:54:16,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5769 states to 5769 states and 8351 transitions. [2020-12-22 09:54:16,118 INFO L78 Accepts]: Start accepts. Automaton has 5769 states and 8351 transitions. Word has length 67 [2020-12-22 09:54:16,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:54:16,118 INFO L481 AbstractCegarLoop]: Abstraction has 5769 states and 8351 transitions. [2020-12-22 09:54:16,119 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:54:16,119 INFO L276 IsEmpty]: Start isEmpty. Operand 5769 states and 8351 transitions. [2020-12-22 09:54:16,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-22 09:54:16,123 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:54:16,124 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:54:16,124 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 09:54:16,124 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:54:16,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:54:16,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1065285143, now seen corresponding path program 1 times [2020-12-22 09:54:16,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:54:16,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498951319] [2020-12-22 09:54:16,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:54:16,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:54:16,248 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 09:54:16,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498951319] [2020-12-22 09:54:16,250 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:54:16,250 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:54:16,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26383105] [2020-12-22 09:54:16,250 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:54:16,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:54:16,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:54:16,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:54:16,252 INFO L87 Difference]: Start difference. First operand 5769 states and 8351 transitions. Second operand 7 states. [2020-12-22 09:54:17,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:54:17,614 INFO L93 Difference]: Finished difference Result 23845 states and 33781 transitions. [2020-12-22 09:54:17,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:54:17,615 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 95 [2020-12-22 09:54:17,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:54:17,660 INFO L225 Difference]: With dead ends: 23845 [2020-12-22 09:54:17,661 INFO L226 Difference]: Without dead ends: 20371 [2020-12-22 09:54:17,672 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:54:17,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20371 states. [2020-12-22 09:54:18,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20371 to 9241. [2020-12-22 09:54:18,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9241 states. [2020-12-22 09:54:18,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9241 states to 9241 states and 13199 transitions. [2020-12-22 09:54:18,434 INFO L78 Accepts]: Start accepts. Automaton has 9241 states and 13199 transitions. Word has length 95 [2020-12-22 09:54:18,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:54:18,434 INFO L481 AbstractCegarLoop]: Abstraction has 9241 states and 13199 transitions. [2020-12-22 09:54:18,434 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:54:18,434 INFO L276 IsEmpty]: Start isEmpty. Operand 9241 states and 13199 transitions. [2020-12-22 09:54:18,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-22 09:54:18,439 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:54:18,439 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:54:18,439 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 09:54:18,440 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:54:18,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:54:18,440 INFO L82 PathProgramCache]: Analyzing trace with hash 1460899337, now seen corresponding path program 1 times [2020-12-22 09:54:18,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:54:18,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619171984] [2020-12-22 09:54:18,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:54:18,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:54:18,558 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 09:54:18,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619171984] [2020-12-22 09:54:18,558 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:54:18,558 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:54:18,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490568360] [2020-12-22 09:54:18,559 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:54:18,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:54:18,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:54:18,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:54:18,560 INFO L87 Difference]: Start difference. First operand 9241 states and 13199 transitions. Second operand 7 states. [2020-12-22 09:54:19,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:54:19,853 INFO L93 Difference]: Finished difference Result 27317 states and 38629 transitions. [2020-12-22 09:54:19,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:54:19,854 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 95 [2020-12-22 09:54:19,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:54:19,902 INFO L225 Difference]: With dead ends: 27317 [2020-12-22 09:54:19,902 INFO L226 Difference]: Without dead ends: 23843 [2020-12-22 09:54:19,913 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:54:19,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23843 states. [2020-12-22 09:54:20,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23843 to 14457. [2020-12-22 09:54:20,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14457 states. [2020-12-22 09:54:20,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14457 states to 14457 states and 20431 transitions. [2020-12-22 09:54:20,833 INFO L78 Accepts]: Start accepts. Automaton has 14457 states and 20431 transitions. Word has length 95 [2020-12-22 09:54:20,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:54:20,833 INFO L481 AbstractCegarLoop]: Abstraction has 14457 states and 20431 transitions. [2020-12-22 09:54:20,833 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:54:20,833 INFO L276 IsEmpty]: Start isEmpty. Operand 14457 states and 20431 transitions. [2020-12-22 09:54:20,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-22 09:54:20,839 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:54:20,839 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:54:20,840 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 09:54:20,840 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:54:20,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:54:20,841 INFO L82 PathProgramCache]: Analyzing trace with hash -1702428119, now seen corresponding path program 1 times [2020-12-22 09:54:20,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:54:20,841 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555640078] [2020-12-22 09:54:20,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:54:20,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:54:20,960 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 09:54:20,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555640078] [2020-12-22 09:54:20,961 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:54:20,961 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:54:20,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064094305] [2020-12-22 09:54:20,961 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:54:20,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:54:20,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:54:20,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:54:20,963 INFO L87 Difference]: Start difference. First operand 14457 states and 20431 transitions. Second operand 7 states. [2020-12-22 09:54:22,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:54:22,508 INFO L93 Difference]: Finished difference Result 30789 states and 43477 transitions. [2020-12-22 09:54:22,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:54:22,509 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 95 [2020-12-22 09:54:22,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:54:22,548 INFO L225 Difference]: With dead ends: 30789 [2020-12-22 09:54:22,548 INFO L226 Difference]: Without dead ends: 27315 [2020-12-22 09:54:22,560 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:54:22,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27315 states. [2020-12-22 09:54:23,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27315 to 17929. [2020-12-22 09:54:23,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17929 states. [2020-12-22 09:54:23,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17929 states to 17929 states and 25279 transitions. [2020-12-22 09:54:23,875 INFO L78 Accepts]: Start accepts. Automaton has 17929 states and 25279 transitions. Word has length 95 [2020-12-22 09:54:23,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:54:23,875 INFO L481 AbstractCegarLoop]: Abstraction has 17929 states and 25279 transitions. [2020-12-22 09:54:23,876 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:54:23,876 INFO L276 IsEmpty]: Start isEmpty. Operand 17929 states and 25279 transitions. [2020-12-22 09:54:23,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-22 09:54:23,881 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:54:23,881 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:54:23,882 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 09:54:23,882 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:54:23,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:54:23,882 INFO L82 PathProgramCache]: Analyzing trace with hash 1357080137, now seen corresponding path program 1 times [2020-12-22 09:54:23,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:54:23,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107737160] [2020-12-22 09:54:23,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:54:23,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:54:24,023 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 09:54:24,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107737160] [2020-12-22 09:54:24,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:54:24,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:54:24,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77526408] [2020-12-22 09:54:24,024 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:54:24,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:54:24,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:54:24,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:54:24,025 INFO L87 Difference]: Start difference. First operand 17929 states and 25279 transitions. Second operand 7 states. [2020-12-22 09:54:25,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:54:25,964 INFO L93 Difference]: Finished difference Result 34261 states and 48325 transitions. [2020-12-22 09:54:25,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:54:25,965 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 95 [2020-12-22 09:54:25,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:54:26,002 INFO L225 Difference]: With dead ends: 34261 [2020-12-22 09:54:26,002 INFO L226 Difference]: Without dead ends: 30787 [2020-12-22 09:54:26,014 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:54:26,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30787 states. [2020-12-22 09:54:27,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30787 to 21401. [2020-12-22 09:54:27,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21401 states. [2020-12-22 09:54:27,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21401 states to 21401 states and 30127 transitions. [2020-12-22 09:54:27,482 INFO L78 Accepts]: Start accepts. Automaton has 21401 states and 30127 transitions. Word has length 95 [2020-12-22 09:54:27,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:54:27,482 INFO L481 AbstractCegarLoop]: Abstraction has 21401 states and 30127 transitions. [2020-12-22 09:54:27,482 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:54:27,482 INFO L276 IsEmpty]: Start isEmpty. Operand 21401 states and 30127 transitions. [2020-12-22 09:54:27,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-22 09:54:27,488 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:54:27,489 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:54:27,489 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 09:54:27,489 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:54:27,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:54:27,489 INFO L82 PathProgramCache]: Analyzing trace with hash -63915415, now seen corresponding path program 1 times [2020-12-22 09:54:27,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:54:27,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206148590] [2020-12-22 09:54:27,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:54:27,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:54:27,614 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 09:54:27,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206148590] [2020-12-22 09:54:27,614 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:54:27,614 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:54:27,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513925564] [2020-12-22 09:54:27,616 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:54:27,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:54:27,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:54:27,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:54:27,617 INFO L87 Difference]: Start difference. First operand 21401 states and 30127 transitions. Second operand 7 states. [2020-12-22 09:54:29,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:54:29,640 INFO L93 Difference]: Finished difference Result 35653 states and 50293 transitions. [2020-12-22 09:54:29,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:54:29,641 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 95 [2020-12-22 09:54:29,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:54:29,682 INFO L225 Difference]: With dead ends: 35653 [2020-12-22 09:54:29,682 INFO L226 Difference]: Without dead ends: 33219 [2020-12-22 09:54:29,696 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:54:29,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33219 states. [2020-12-22 09:54:31,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33219 to 23833. [2020-12-22 09:54:31,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23833 states. [2020-12-22 09:54:31,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23833 states to 23833 states and 33551 transitions. [2020-12-22 09:54:31,546 INFO L78 Accepts]: Start accepts. Automaton has 23833 states and 33551 transitions. Word has length 95 [2020-12-22 09:54:31,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:54:31,546 INFO L481 AbstractCegarLoop]: Abstraction has 23833 states and 33551 transitions. [2020-12-22 09:54:31,546 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:54:31,546 INFO L276 IsEmpty]: Start isEmpty. Operand 23833 states and 33551 transitions. [2020-12-22 09:54:31,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-12-22 09:54:31,553 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:54:31,554 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:54:31,554 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 09:54:31,554 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:54:31,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:54:31,555 INFO L82 PathProgramCache]: Analyzing trace with hash -1416628636, now seen corresponding path program 1 times [2020-12-22 09:54:31,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:54:31,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954776009] [2020-12-22 09:54:31,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:54:31,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:54:32,097 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:54:32,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954776009] [2020-12-22 09:54:32,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754129490] [2020-12-22 09:54:32,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:54:32,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:54:32,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-22 09:54:32,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:54:32,637 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 09:54:32,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:54:32,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 21 [2020-12-22 09:54:32,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142078726] [2020-12-22 09:54:32,638 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 09:54:32,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:54:32,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 09:54:32,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2020-12-22 09:54:32,640 INFO L87 Difference]: Start difference. First operand 23833 states and 33551 transitions. Second operand 21 states. [2020-12-22 09:54:33,284 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-12-22 09:54:47,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:54:47,494 INFO L93 Difference]: Finished difference Result 140634 states and 195032 transitions. [2020-12-22 09:54:47,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2020-12-22 09:54:47,495 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 96 [2020-12-22 09:54:47,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:54:47,724 INFO L225 Difference]: With dead ends: 140634 [2020-12-22 09:54:47,724 INFO L226 Difference]: Without dead ends: 119096 [2020-12-22 09:54:47,761 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4681 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=2354, Invalid=10078, Unknown=0, NotChecked=0, Total=12432 [2020-12-22 09:54:47,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119096 states. [2020-12-22 09:54:54,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119096 to 74513. [2020-12-22 09:54:54,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74513 states. [2020-12-22 09:54:54,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74513 states to 74513 states and 102959 transitions. [2020-12-22 09:54:54,735 INFO L78 Accepts]: Start accepts. Automaton has 74513 states and 102959 transitions. Word has length 96 [2020-12-22 09:54:54,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:54:54,736 INFO L481 AbstractCegarLoop]: Abstraction has 74513 states and 102959 transitions. [2020-12-22 09:54:54,736 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 09:54:54,736 INFO L276 IsEmpty]: Start isEmpty. Operand 74513 states and 102959 transitions. [2020-12-22 09:54:54,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-22 09:54:54,755 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:54:54,756 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:54:54,969 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:54:54,970 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:54:54,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:54:54,971 INFO L82 PathProgramCache]: Analyzing trace with hash -1879245087, now seen corresponding path program 1 times [2020-12-22 09:54:54,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:54:54,972 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927741266] [2020-12-22 09:54:54,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:54:55,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:54:55,458 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:54:55,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927741266] [2020-12-22 09:54:55,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224042907] [2020-12-22 09:54:55,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:54:55,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:54:55,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 09:54:55,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:54:56,043 WARN L197 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-12-22 09:54:56,059 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:54:56,426 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:54:56,426 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:54:56,426 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 09:54:56,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210303157] [2020-12-22 09:54:56,427 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 09:54:56,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:54:56,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 09:54:56,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:54:56,428 INFO L87 Difference]: Start difference. First operand 74513 states and 102959 transitions. Second operand 17 states. [2020-12-22 09:55:00,404 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2020-12-22 09:55:00,551 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-12-22 09:55:00,976 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 47 [2020-12-22 09:55:01,214 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-12-22 09:55:01,867 WARN L197 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2020-12-22 09:55:02,197 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-12-22 09:55:02,483 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2020-12-22 09:55:02,811 WARN L197 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 47 [2020-12-22 09:55:03,844 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-12-22 09:55:04,899 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-12-22 09:56:31,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:56:31,822 INFO L93 Difference]: Finished difference Result 950719 states and 1295034 transitions. [2020-12-22 09:56:31,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2020-12-22 09:56:31,823 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 97 [2020-12-22 09:56:31,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:56:33,897 INFO L225 Difference]: With dead ends: 950719 [2020-12-22 09:56:33,897 INFO L226 Difference]: Without dead ends: 878501 [2020-12-22 09:56:34,248 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6261 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=2263, Invalid=14249, Unknown=0, NotChecked=0, Total=16512 [2020-12-22 09:56:35,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 878501 states. [2020-12-22 09:57:14,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 878501 to 337269. [2020-12-22 09:57:14,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 337269 states. [2020-12-22 09:57:15,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337269 states to 337269 states and 460023 transitions. [2020-12-22 09:57:15,698 INFO L78 Accepts]: Start accepts. Automaton has 337269 states and 460023 transitions. Word has length 97 [2020-12-22 09:57:15,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:57:15,699 INFO L481 AbstractCegarLoop]: Abstraction has 337269 states and 460023 transitions. [2020-12-22 09:57:15,699 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 09:57:15,699 INFO L276 IsEmpty]: Start isEmpty. Operand 337269 states and 460023 transitions. [2020-12-22 09:57:15,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-22 09:57:15,716 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:57:15,725 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:57:15,926 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:57:15,926 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:57:15,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:57:15,927 INFO L82 PathProgramCache]: Analyzing trace with hash -135405655, now seen corresponding path program 1 times [2020-12-22 09:57:15,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:57:15,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282030597] [2020-12-22 09:57:15,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:57:15,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:16,050 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:57:16,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282030597] [2020-12-22 09:57:16,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:57:16,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:57:16,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086760170] [2020-12-22 09:57:16,052 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:57:16,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:57:16,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:57:16,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:57:16,054 INFO L87 Difference]: Start difference. First operand 337269 states and 460023 transitions. Second operand 3 states.