/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.7.ufo.BOUNDED-14.pals+Problem12_label00.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 10:12:04,536 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 10:12:04,540 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 10:12:04,603 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 10:12:04,604 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 10:12:04,608 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 10:12:04,612 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 10:12:04,621 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 10:12:04,624 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 10:12:04,631 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 10:12:04,632 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 10:12:04,634 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 10:12:04,634 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 10:12:04,638 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 10:12:04,640 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 10:12:04,642 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 10:12:04,643 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 10:12:04,647 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 10:12:04,654 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 10:12:04,663 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 10:12:04,665 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 10:12:04,667 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 10:12:04,668 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 10:12:04,671 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 10:12:04,679 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 10:12:04,691 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 10:12:04,692 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 10:12:04,693 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 10:12:04,694 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 10:12:04,769 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 10:12:04,770 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 10:12:04,775 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 10:12:04,775 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 10:12:04,775 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 10:12:04,776 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 10:12:04,776 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 10:12:04,776 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 10:12:04,776 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 10:12:04,777 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 10:12:04,778 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 10:12:04,778 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 10:12:04,778 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 10:12:04,778 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 10:12:04,779 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 10:12:04,779 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 10:12:04,779 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 10:12:04,779 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 10:12:04,779 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 10:12:04,780 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 10:12:04,780 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 10:12:04,780 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 10:12:04,780 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 10:12:04,781 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 10:12:04,781 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 10:12:04,781 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 10:12:05,187 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 10:12:05,231 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 10:12:05,235 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 10:12:05,237 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 10:12:05,238 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 10:12:05,239 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.7.ufo.BOUNDED-14.pals+Problem12_label00.c [2020-12-22 10:12:05,332 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e9ebb7590/ed248dd87be6493380e4c8ab4e564d42/FLAGec6ebd322 [2020-12-22 10:12:06,403 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 10:12:06,403 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.7.ufo.BOUNDED-14.pals+Problem12_label00.c [2020-12-22 10:12:06,463 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e9ebb7590/ed248dd87be6493380e4c8ab4e564d42/FLAGec6ebd322 [2020-12-22 10:12:06,813 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e9ebb7590/ed248dd87be6493380e4c8ab4e564d42 [2020-12-22 10:12:06,816 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 10:12:06,818 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 10:12:06,823 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 10:12:06,823 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 10:12:06,827 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 10:12:06,828 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:12:06" (1/1) ... [2020-12-22 10:12:06,830 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7978af9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:12:06, skipping insertion in model container [2020-12-22 10:12:06,830 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:12:06" (1/1) ... [2020-12-22 10:12:06,839 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 10:12:07,031 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 10:12:07,570 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.7.ufo.BOUNDED-14.pals+Problem12_label00.c[20544,20557] [2020-12-22 10:12:07,600 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.7.ufo.BOUNDED-14.pals+Problem12_label00.c[22176,22189] [2020-12-22 10:12:08,630 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:12:08,647 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 10:12:08,723 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.7.ufo.BOUNDED-14.pals+Problem12_label00.c[20544,20557] [2020-12-22 10:12:08,729 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.7.ufo.BOUNDED-14.pals+Problem12_label00.c[22176,22189] [2020-12-22 10:12:09,364 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:12:09,412 INFO L208 MainTranslator]: Completed translation [2020-12-22 10:12:09,412 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:12:09 WrapperNode [2020-12-22 10:12:09,413 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 10:12:09,415 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 10:12:09,415 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 10:12:09,415 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 10:12:09,424 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:12:09" (1/1) ... [2020-12-22 10:12:09,502 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:12:09" (1/1) ... [2020-12-22 10:12:09,891 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 10:12:09,893 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 10:12:09,893 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 10:12:09,893 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 10:12:09,907 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:12:09" (1/1) ... [2020-12-22 10:12:09,907 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:12:09" (1/1) ... [2020-12-22 10:12:09,958 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:12:09" (1/1) ... [2020-12-22 10:12:09,959 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:12:09" (1/1) ... [2020-12-22 10:12:10,089 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:12:09" (1/1) ... [2020-12-22 10:12:10,130 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:12:09" (1/1) ... [2020-12-22 10:12:10,327 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:12:09" (1/1) ... [2020-12-22 10:12:10,382 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 10:12:10,383 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 10:12:10,383 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 10:12:10,384 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 10:12:10,385 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:12:09" (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 10:12:10,497 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 10:12:10,498 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 10:12:10,498 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 10:12:10,498 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 10:12:16,218 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 10:12:16,219 INFO L299 CfgBuilder]: Removed 40 assume(true) statements. [2020-12-22 10:12:16,223 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:12:16 BoogieIcfgContainer [2020-12-22 10:12:16,224 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 10:12:16,228 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 10:12:16,230 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 10:12:16,235 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 10:12:16,235 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 10:12:06" (1/3) ... [2020-12-22 10:12:16,236 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79793b47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:12:16, skipping insertion in model container [2020-12-22 10:12:16,237 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:12:09" (2/3) ... [2020-12-22 10:12:16,237 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79793b47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:12:16, skipping insertion in model container [2020-12-22 10:12:16,237 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:12:16" (3/3) ... [2020-12-22 10:12:16,239 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.7.ufo.BOUNDED-14.pals+Problem12_label00.c [2020-12-22 10:12:16,249 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 10:12:16,256 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 10:12:16,276 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 10:12:16,329 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 10:12:16,329 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 10:12:16,329 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 10:12:16,329 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 10:12:16,330 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 10:12:16,330 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 10:12:16,330 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 10:12:16,330 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 10:12:16,432 INFO L276 IsEmpty]: Start isEmpty. Operand 944 states. [2020-12-22 10:12:16,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-22 10:12:16,440 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:12:16,441 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:12:16,441 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:12:16,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:12:16,452 INFO L82 PathProgramCache]: Analyzing trace with hash -1352241867, now seen corresponding path program 1 times [2020-12-22 10:12:16,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:12:16,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76854848] [2020-12-22 10:12:16,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:12:16,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:12:16,880 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 10:12:16,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76854848] [2020-12-22 10:12:16,882 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:12:16,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 10:12:16,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404965816] [2020-12-22 10:12:16,888 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:12:16,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:12:16,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:12:16,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:12:16,908 INFO L87 Difference]: Start difference. First operand 944 states. Second operand 3 states. [2020-12-22 10:12:23,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:12:23,252 INFO L93 Difference]: Finished difference Result 2587 states and 4966 transitions. [2020-12-22 10:12:23,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:12:23,254 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-12-22 10:12:23,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:12:23,285 INFO L225 Difference]: With dead ends: 2587 [2020-12-22 10:12:23,285 INFO L226 Difference]: Without dead ends: 1629 [2020-12-22 10:12:23,295 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:12:23,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1629 states. [2020-12-22 10:12:23,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1629 to 1629. [2020-12-22 10:12:23,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1629 states. [2020-12-22 10:12:23,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1629 states to 1629 states and 2680 transitions. [2020-12-22 10:12:23,446 INFO L78 Accepts]: Start accepts. Automaton has 1629 states and 2680 transitions. Word has length 16 [2020-12-22 10:12:23,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:12:23,448 INFO L481 AbstractCegarLoop]: Abstraction has 1629 states and 2680 transitions. [2020-12-22 10:12:23,448 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:12:23,448 INFO L276 IsEmpty]: Start isEmpty. Operand 1629 states and 2680 transitions. [2020-12-22 10:12:23,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-22 10:12:23,452 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:12:23,453 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] [2020-12-22 10:12:23,453 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 10:12:23,453 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:12:23,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:12:23,456 INFO L82 PathProgramCache]: Analyzing trace with hash 325703937, now seen corresponding path program 1 times [2020-12-22 10:12:23,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:12:23,457 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446020819] [2020-12-22 10:12:23,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:12:23,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:12:23,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:12:23,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446020819] [2020-12-22 10:12:23,715 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:12:23,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:12:23,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514801373] [2020-12-22 10:12:23,717 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 10:12:23,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:12:23,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 10:12:23,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 10:12:23,719 INFO L87 Difference]: Start difference. First operand 1629 states and 2680 transitions. Second operand 5 states. [2020-12-22 10:12:23,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:12:23,856 INFO L93 Difference]: Finished difference Result 1701 states and 2792 transitions. [2020-12-22 10:12:23,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 10:12:23,856 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 42 [2020-12-22 10:12:23,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:12:23,867 INFO L225 Difference]: With dead ends: 1701 [2020-12-22 10:12:23,868 INFO L226 Difference]: Without dead ends: 1629 [2020-12-22 10:12:23,870 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 10:12:23,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1629 states. [2020-12-22 10:12:23,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1629 to 1629. [2020-12-22 10:12:23,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1629 states. [2020-12-22 10:12:23,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1629 states to 1629 states and 2630 transitions. [2020-12-22 10:12:23,926 INFO L78 Accepts]: Start accepts. Automaton has 1629 states and 2630 transitions. Word has length 42 [2020-12-22 10:12:23,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:12:23,926 INFO L481 AbstractCegarLoop]: Abstraction has 1629 states and 2630 transitions. [2020-12-22 10:12:23,926 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 10:12:23,926 INFO L276 IsEmpty]: Start isEmpty. Operand 1629 states and 2630 transitions. [2020-12-22 10:12:23,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-12-22 10:12:23,939 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:12:23,940 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:12:23,941 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 10:12:23,942 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:12:23,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:12:23,943 INFO L82 PathProgramCache]: Analyzing trace with hash -518621894, now seen corresponding path program 1 times [2020-12-22 10:12:23,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:12:23,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728317972] [2020-12-22 10:12:23,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:12:24,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:12:24,167 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:12:24,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728317972] [2020-12-22 10:12:24,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:12:24,170 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:12:24,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804599913] [2020-12-22 10:12:24,173 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:12:24,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:12:24,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:12:24,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:12:24,176 INFO L87 Difference]: Start difference. First operand 1629 states and 2630 transitions. Second operand 3 states. [2020-12-22 10:12:30,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:12:30,370 INFO L93 Difference]: Finished difference Result 4635 states and 7557 transitions. [2020-12-22 10:12:30,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:12:30,371 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 87 [2020-12-22 10:12:30,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:12:30,390 INFO L225 Difference]: With dead ends: 4635 [2020-12-22 10:12:30,390 INFO L226 Difference]: Without dead ends: 3131 [2020-12-22 10:12:30,394 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 10:12:30,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3131 states. [2020-12-22 10:12:30,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3131 to 3131. [2020-12-22 10:12:30,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3131 states. [2020-12-22 10:12:30,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3131 states to 3131 states and 4786 transitions. [2020-12-22 10:12:30,474 INFO L78 Accepts]: Start accepts. Automaton has 3131 states and 4786 transitions. Word has length 87 [2020-12-22 10:12:30,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:12:30,475 INFO L481 AbstractCegarLoop]: Abstraction has 3131 states and 4786 transitions. [2020-12-22 10:12:30,475 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:12:30,475 INFO L276 IsEmpty]: Start isEmpty. Operand 3131 states and 4786 transitions. [2020-12-22 10:12:30,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-12-22 10:12:30,476 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:12:30,476 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:12:30,477 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 10:12:30,477 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:12:30,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:12:30,478 INFO L82 PathProgramCache]: Analyzing trace with hash -274006543, now seen corresponding path program 1 times [2020-12-22 10:12:30,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:12:30,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068706324] [2020-12-22 10:12:30,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:12:30,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:12:30,582 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:12:30,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068706324] [2020-12-22 10:12:30,583 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:12:30,583 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 10:12:30,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553336409] [2020-12-22 10:12:30,584 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:12:30,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:12:30,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:12:30,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:12:30,585 INFO L87 Difference]: Start difference. First operand 3131 states and 4786 transitions. Second operand 3 states. [2020-12-22 10:12:36,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:12:36,772 INFO L93 Difference]: Finished difference Result 9143 states and 14026 transitions. [2020-12-22 10:12:36,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:12:36,773 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 90 [2020-12-22 10:12:36,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:12:36,806 INFO L225 Difference]: With dead ends: 9143 [2020-12-22 10:12:36,806 INFO L226 Difference]: Without dead ends: 6137 [2020-12-22 10:12:36,812 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:12:36,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6137 states. [2020-12-22 10:12:36,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6137 to 6135. [2020-12-22 10:12:36,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6135 states. [2020-12-22 10:12:36,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6135 states to 6135 states and 8367 transitions. [2020-12-22 10:12:36,947 INFO L78 Accepts]: Start accepts. Automaton has 6135 states and 8367 transitions. Word has length 90 [2020-12-22 10:12:36,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:12:36,947 INFO L481 AbstractCegarLoop]: Abstraction has 6135 states and 8367 transitions. [2020-12-22 10:12:36,948 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:12:36,948 INFO L276 IsEmpty]: Start isEmpty. Operand 6135 states and 8367 transitions. [2020-12-22 10:12:36,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:12:36,949 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:12:36,949 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:12:36,949 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 10:12:36,949 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:12:36,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:12:36,950 INFO L82 PathProgramCache]: Analyzing trace with hash 1207745120, now seen corresponding path program 1 times [2020-12-22 10:12:36,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:12:36,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700158894] [2020-12-22 10:12:36,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:12:36,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:12:37,029 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 10:12:37,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700158894] [2020-12-22 10:12:37,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:12:37,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:12:37,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846296452] [2020-12-22 10:12:37,031 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:12:37,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:12:37,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:12:37,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:12:37,032 INFO L87 Difference]: Start difference. First operand 6135 states and 8367 transitions. Second operand 3 states. [2020-12-22 10:12:37,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:12:37,097 INFO L93 Difference]: Finished difference Result 6265 states and 8573 transitions. [2020-12-22 10:12:37,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:12:37,098 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 10:12:37,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:12:37,133 INFO L225 Difference]: With dead ends: 6265 [2020-12-22 10:12:37,133 INFO L226 Difference]: Without dead ends: 6197 [2020-12-22 10:12:37,137 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 10:12:37,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6197 states. [2020-12-22 10:12:37,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6197 to 6195. [2020-12-22 10:12:37,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6195 states. [2020-12-22 10:12:37,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6195 states to 6195 states and 8463 transitions. [2020-12-22 10:12:37,299 INFO L78 Accepts]: Start accepts. Automaton has 6195 states and 8463 transitions. Word has length 91 [2020-12-22 10:12:37,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:12:37,300 INFO L481 AbstractCegarLoop]: Abstraction has 6195 states and 8463 transitions. [2020-12-22 10:12:37,300 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:12:37,300 INFO L276 IsEmpty]: Start isEmpty. Operand 6195 states and 8463 transitions. [2020-12-22 10:12:37,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:12:37,308 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:12:37,308 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:12:37,308 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 10:12:37,309 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:12:37,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:12:37,309 INFO L82 PathProgramCache]: Analyzing trace with hash -1564953708, now seen corresponding path program 1 times [2020-12-22 10:12:37,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:12:37,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236957259] [2020-12-22 10:12:37,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:12:37,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:12:37,430 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 10:12:37,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236957259] [2020-12-22 10:12:37,431 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:12:37,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:12:37,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626465189] [2020-12-22 10:12:37,433 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:12:37,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:12:37,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:12:37,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:12:37,434 INFO L87 Difference]: Start difference. First operand 6195 states and 8463 transitions. Second operand 3 states. [2020-12-22 10:12:37,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:12:37,498 INFO L93 Difference]: Finished difference Result 6439 states and 8851 transitions. [2020-12-22 10:12:37,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:12:37,499 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 10:12:37,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:12:37,553 INFO L225 Difference]: With dead ends: 6439 [2020-12-22 10:12:37,553 INFO L226 Difference]: Without dead ends: 6311 [2020-12-22 10:12:37,556 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 10:12:37,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6311 states. [2020-12-22 10:12:37,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6311 to 6309. [2020-12-22 10:12:37,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6309 states. [2020-12-22 10:12:37,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6309 states to 6309 states and 8644 transitions. [2020-12-22 10:12:37,698 INFO L78 Accepts]: Start accepts. Automaton has 6309 states and 8644 transitions. Word has length 91 [2020-12-22 10:12:37,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:12:37,700 INFO L481 AbstractCegarLoop]: Abstraction has 6309 states and 8644 transitions. [2020-12-22 10:12:37,700 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:12:37,700 INFO L276 IsEmpty]: Start isEmpty. Operand 6309 states and 8644 transitions. [2020-12-22 10:12:37,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:12:37,701 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:12:37,702 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:12:37,702 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 10:12:37,703 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:12:37,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:12:37,706 INFO L82 PathProgramCache]: Analyzing trace with hash 1479108296, now seen corresponding path program 1 times [2020-12-22 10:12:37,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:12:37,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082739107] [2020-12-22 10:12:37,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:12:37,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:12:37,898 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 10:12:37,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082739107] [2020-12-22 10:12:37,900 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:12:37,900 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:12:37,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507203850] [2020-12-22 10:12:37,901 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:12:37,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:12:37,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:12:37,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:12:37,902 INFO L87 Difference]: Start difference. First operand 6309 states and 8644 transitions. Second operand 3 states. [2020-12-22 10:12:37,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:12:37,958 INFO L93 Difference]: Finished difference Result 6769 states and 9374 transitions. [2020-12-22 10:12:37,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:12:37,959 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 10:12:37,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:12:37,975 INFO L225 Difference]: With dead ends: 6769 [2020-12-22 10:12:37,975 INFO L226 Difference]: Without dead ends: 6527 [2020-12-22 10:12:37,978 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 10:12:37,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6527 states. [2020-12-22 10:12:38,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6527 to 6525. [2020-12-22 10:12:38,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6525 states. [2020-12-22 10:12:38,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6525 states to 6525 states and 8984 transitions. [2020-12-22 10:12:38,101 INFO L78 Accepts]: Start accepts. Automaton has 6525 states and 8984 transitions. Word has length 91 [2020-12-22 10:12:38,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:12:38,102 INFO L481 AbstractCegarLoop]: Abstraction has 6525 states and 8984 transitions. [2020-12-22 10:12:38,102 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:12:38,102 INFO L276 IsEmpty]: Start isEmpty. Operand 6525 states and 8984 transitions. [2020-12-22 10:12:38,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:12:38,103 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:12:38,103 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:12:38,104 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 10:12:38,104 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:12:38,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:12:38,104 INFO L82 PathProgramCache]: Analyzing trace with hash 733525566, now seen corresponding path program 1 times [2020-12-22 10:12:38,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:12:38,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403693533] [2020-12-22 10:12:38,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:12:38,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:12:38,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:12:38,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403693533] [2020-12-22 10:12:38,177 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:12:38,177 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:12:38,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904495254] [2020-12-22 10:12:38,178 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:12:38,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:12:38,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:12:38,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:12:38,179 INFO L87 Difference]: Start difference. First operand 6525 states and 8984 transitions. Second operand 3 states. [2020-12-22 10:12:38,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:12:38,241 INFO L93 Difference]: Finished difference Result 7393 states and 10354 transitions. [2020-12-22 10:12:38,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:12:38,241 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 10:12:38,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:12:38,256 INFO L225 Difference]: With dead ends: 7393 [2020-12-22 10:12:38,256 INFO L226 Difference]: Without dead ends: 6935 [2020-12-22 10:12:38,260 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 10:12:38,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6935 states. [2020-12-22 10:12:38,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6935 to 6933. [2020-12-22 10:12:38,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6933 states. [2020-12-22 10:12:38,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6933 states to 6933 states and 9620 transitions. [2020-12-22 10:12:38,393 INFO L78 Accepts]: Start accepts. Automaton has 6933 states and 9620 transitions. Word has length 91 [2020-12-22 10:12:38,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:12:38,393 INFO L481 AbstractCegarLoop]: Abstraction has 6933 states and 9620 transitions. [2020-12-22 10:12:38,393 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:12:38,393 INFO L276 IsEmpty]: Start isEmpty. Operand 6933 states and 9620 transitions. [2020-12-22 10:12:38,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:12:38,395 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:12:38,395 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:12:38,395 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 10:12:38,395 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:12:38,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:12:38,396 INFO L82 PathProgramCache]: Analyzing trace with hash -1206505292, now seen corresponding path program 1 times [2020-12-22 10:12:38,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:12:38,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652033922] [2020-12-22 10:12:38,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:12:38,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:12:38,465 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 10:12:38,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652033922] [2020-12-22 10:12:38,466 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:12:38,466 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:12:38,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260050449] [2020-12-22 10:12:38,467 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:12:38,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:12:38,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:12:38,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:12:38,468 INFO L87 Difference]: Start difference. First operand 6933 states and 9620 transitions. Second operand 3 states. [2020-12-22 10:12:38,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:12:38,561 INFO L93 Difference]: Finished difference Result 8569 states and 12182 transitions. [2020-12-22 10:12:38,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:12:38,562 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 10:12:38,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:12:38,577 INFO L225 Difference]: With dead ends: 8569 [2020-12-22 10:12:38,577 INFO L226 Difference]: Without dead ends: 7703 [2020-12-22 10:12:38,582 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 10:12:38,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7703 states. [2020-12-22 10:12:38,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7703 to 7701. [2020-12-22 10:12:38,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7701 states. [2020-12-22 10:12:38,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7701 states to 7701 states and 10804 transitions. [2020-12-22 10:12:38,752 INFO L78 Accepts]: Start accepts. Automaton has 7701 states and 10804 transitions. Word has length 91 [2020-12-22 10:12:38,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:12:38,752 INFO L481 AbstractCegarLoop]: Abstraction has 7701 states and 10804 transitions. [2020-12-22 10:12:38,752 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:12:38,752 INFO L276 IsEmpty]: Start isEmpty. Operand 7701 states and 10804 transitions. [2020-12-22 10:12:38,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:12:38,754 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:12:38,754 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:12:38,754 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 10:12:38,754 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:12:38,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:12:38,755 INFO L82 PathProgramCache]: Analyzing trace with hash 1494177322, now seen corresponding path program 1 times [2020-12-22 10:12:38,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:12:38,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451539752] [2020-12-22 10:12:38,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:12:38,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:12:38,917 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 10:12:38,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451539752] [2020-12-22 10:12:38,918 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:12:38,918 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:12:38,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903208502] [2020-12-22 10:12:38,919 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:12:38,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:12:38,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:12:38,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:12:38,924 INFO L87 Difference]: Start difference. First operand 7701 states and 10804 transitions. Second operand 9 states. [2020-12-22 10:12:40,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:12:40,224 INFO L93 Difference]: Finished difference Result 30577 states and 46434 transitions. [2020-12-22 10:12:40,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 10:12:40,226 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 91 [2020-12-22 10:12:40,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:12:40,288 INFO L225 Difference]: With dead ends: 30577 [2020-12-22 10:12:40,288 INFO L226 Difference]: Without dead ends: 28943 [2020-12-22 10:12:40,302 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2020-12-22 10:12:40,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28943 states. [2020-12-22 10:12:40,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28943 to 9333. [2020-12-22 10:12:40,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9333 states. [2020-12-22 10:12:40,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9333 states to 9333 states and 13284 transitions. [2020-12-22 10:12:40,744 INFO L78 Accepts]: Start accepts. Automaton has 9333 states and 13284 transitions. Word has length 91 [2020-12-22 10:12:40,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:12:40,744 INFO L481 AbstractCegarLoop]: Abstraction has 9333 states and 13284 transitions. [2020-12-22 10:12:40,744 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:12:40,744 INFO L276 IsEmpty]: Start isEmpty. Operand 9333 states and 13284 transitions. [2020-12-22 10:12:40,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:12:40,745 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:12:40,746 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] [2020-12-22 10:12:40,746 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 10:12:40,746 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:12:40,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:12:40,747 INFO L82 PathProgramCache]: Analyzing trace with hash -1095769020, now seen corresponding path program 1 times [2020-12-22 10:12:40,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:12:40,747 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855785894] [2020-12-22 10:12:40,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:12:40,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:12:40,830 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:12:40,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855785894] [2020-12-22 10:12:40,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:12:40,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 10:12:40,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034043435] [2020-12-22 10:12:40,832 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:12:40,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:12:40,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:12:40,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:12:40,835 INFO L87 Difference]: Start difference. First operand 9333 states and 13284 transitions. Second operand 3 states. [2020-12-22 10:12:47,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:12:47,432 INFO L93 Difference]: Finished difference Result 21353 states and 29686 transitions. [2020-12-22 10:12:47,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:12:47,433 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 10:12:47,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:12:47,465 INFO L225 Difference]: With dead ends: 21353 [2020-12-22 10:12:47,465 INFO L226 Difference]: Without dead ends: 15343 [2020-12-22 10:12:47,475 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:12:47,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15343 states. [2020-12-22 10:12:47,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15343 to 15341. [2020-12-22 10:12:47,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15341 states. [2020-12-22 10:12:47,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15341 states to 15341 states and 20458 transitions. [2020-12-22 10:12:47,815 INFO L78 Accepts]: Start accepts. Automaton has 15341 states and 20458 transitions. Word has length 91 [2020-12-22 10:12:47,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:12:47,815 INFO L481 AbstractCegarLoop]: Abstraction has 15341 states and 20458 transitions. [2020-12-22 10:12:47,815 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:12:47,815 INFO L276 IsEmpty]: Start isEmpty. Operand 15341 states and 20458 transitions. [2020-12-22 10:12:47,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 10:12:47,816 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:12:47,817 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:12:47,817 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 10:12:47,817 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:12:47,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:12:47,818 INFO L82 PathProgramCache]: Analyzing trace with hash -30360326, now seen corresponding path program 1 times [2020-12-22 10:12:47,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:12:47,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190661757] [2020-12-22 10:12:47,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:12:47,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:12:47,883 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 10:12:47,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190661757] [2020-12-22 10:12:47,884 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:12:47,884 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:12:47,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326489989] [2020-12-22 10:12:47,885 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:12:47,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:12:47,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:12:47,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:12:47,886 INFO L87 Difference]: Start difference. First operand 15341 states and 20458 transitions. Second operand 3 states. [2020-12-22 10:12:48,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:12:48,308 INFO L93 Difference]: Finished difference Result 20163 states and 27870 transitions. [2020-12-22 10:12:48,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:12:48,309 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 93 [2020-12-22 10:12:48,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:12:48,341 INFO L225 Difference]: With dead ends: 20163 [2020-12-22 10:12:48,342 INFO L226 Difference]: Without dead ends: 16897 [2020-12-22 10:12:48,354 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 10:12:48,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16897 states. [2020-12-22 10:12:48,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16897 to 16895. [2020-12-22 10:12:48,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16895 states. [2020-12-22 10:12:48,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16895 states to 16895 states and 22796 transitions. [2020-12-22 10:12:48,844 INFO L78 Accepts]: Start accepts. Automaton has 16895 states and 22796 transitions. Word has length 93 [2020-12-22 10:12:48,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:12:48,845 INFO L481 AbstractCegarLoop]: Abstraction has 16895 states and 22796 transitions. [2020-12-22 10:12:48,845 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:12:48,845 INFO L276 IsEmpty]: Start isEmpty. Operand 16895 states and 22796 transitions. [2020-12-22 10:12:48,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 10:12:48,846 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:12:48,846 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:12:48,846 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 10:12:48,847 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:12:48,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:12:48,847 INFO L82 PathProgramCache]: Analyzing trace with hash 36133186, now seen corresponding path program 1 times [2020-12-22 10:12:48,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:12:48,848 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686629851] [2020-12-22 10:12:48,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:12:48,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:12:49,233 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 10:12:49,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686629851] [2020-12-22 10:12:49,234 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:12:49,234 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:12:49,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49820142] [2020-12-22 10:12:49,235 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:12:49,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:12:49,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:12:49,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:12:49,236 INFO L87 Difference]: Start difference. First operand 16895 states and 22796 transitions. Second operand 9 states. [2020-12-22 10:12:50,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:12:50,063 INFO L93 Difference]: Finished difference Result 21715 states and 30158 transitions. [2020-12-22 10:12:50,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:12:50,063 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 93 [2020-12-22 10:12:50,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:12:50,091 INFO L225 Difference]: With dead ends: 21715 [2020-12-22 10:12:50,092 INFO L226 Difference]: Without dead ends: 16897 [2020-12-22 10:12:50,103 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2020-12-22 10:12:50,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16897 states. [2020-12-22 10:12:50,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16897 to 16895. [2020-12-22 10:12:50,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16895 states. [2020-12-22 10:12:50,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16895 states to 16895 states and 22748 transitions. [2020-12-22 10:12:50,661 INFO L78 Accepts]: Start accepts. Automaton has 16895 states and 22748 transitions. Word has length 93 [2020-12-22 10:12:50,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:12:50,662 INFO L481 AbstractCegarLoop]: Abstraction has 16895 states and 22748 transitions. [2020-12-22 10:12:50,662 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:12:50,662 INFO L276 IsEmpty]: Start isEmpty. Operand 16895 states and 22748 transitions. [2020-12-22 10:12:50,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 10:12:50,663 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:12:50,664 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:12:50,664 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 10:12:50,664 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:12:50,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:12:50,664 INFO L82 PathProgramCache]: Analyzing trace with hash 1825047262, now seen corresponding path program 1 times [2020-12-22 10:12:50,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:12:50,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434949784] [2020-12-22 10:12:50,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:12:50,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:12:50,755 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 10:12:50,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434949784] [2020-12-22 10:12:50,756 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:12:50,756 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:12:50,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908651554] [2020-12-22 10:12:50,757 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:12:50,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:12:50,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:12:50,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:12:50,758 INFO L87 Difference]: Start difference. First operand 16895 states and 22748 transitions. Second operand 3 states. [2020-12-22 10:12:51,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:12:51,278 INFO L93 Difference]: Finished difference Result 25955 states and 36414 transitions. [2020-12-22 10:12:51,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:12:51,279 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 93 [2020-12-22 10:12:51,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:12:51,312 INFO L225 Difference]: With dead ends: 25955 [2020-12-22 10:12:51,312 INFO L226 Difference]: Without dead ends: 21137 [2020-12-22 10:12:51,325 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:12:51,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21137 states. [2020-12-22 10:12:52,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21137 to 21135. [2020-12-22 10:12:52,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21135 states. [2020-12-22 10:12:52,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21135 states to 21135 states and 29004 transitions. [2020-12-22 10:12:52,221 INFO L78 Accepts]: Start accepts. Automaton has 21135 states and 29004 transitions. Word has length 93 [2020-12-22 10:12:52,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:12:52,222 INFO L481 AbstractCegarLoop]: Abstraction has 21135 states and 29004 transitions. [2020-12-22 10:12:52,222 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:12:52,222 INFO L276 IsEmpty]: Start isEmpty. Operand 21135 states and 29004 transitions. [2020-12-22 10:12:52,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 10:12:52,223 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:12:52,223 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:12:52,224 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 10:12:52,224 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:12:52,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:12:52,224 INFO L82 PathProgramCache]: Analyzing trace with hash -1222412418, now seen corresponding path program 1 times [2020-12-22 10:12:52,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:12:52,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507521017] [2020-12-22 10:12:52,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:12:52,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:12:52,301 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 10:12:52,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507521017] [2020-12-22 10:12:52,302 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:12:52,302 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:12:52,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100985966] [2020-12-22 10:12:52,303 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:12:52,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:12:52,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:12:52,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:12:52,304 INFO L87 Difference]: Start difference. First operand 21135 states and 29004 transitions. Second operand 3 states. [2020-12-22 10:12:53,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:12:53,115 INFO L93 Difference]: Finished difference Result 38099 states and 54222 transitions. [2020-12-22 10:12:53,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:12:53,116 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 93 [2020-12-22 10:12:53,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:12:53,157 INFO L225 Difference]: With dead ends: 38099 [2020-12-22 10:12:53,157 INFO L226 Difference]: Without dead ends: 29041 [2020-12-22 10:12:53,174 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 10:12:53,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29041 states. [2020-12-22 10:12:54,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29041 to 29039. [2020-12-22 10:12:54,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29039 states. [2020-12-22 10:12:54,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29039 states to 29039 states and 40460 transitions. [2020-12-22 10:12:54,175 INFO L78 Accepts]: Start accepts. Automaton has 29039 states and 40460 transitions. Word has length 93 [2020-12-22 10:12:54,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:12:54,175 INFO L481 AbstractCegarLoop]: Abstraction has 29039 states and 40460 transitions. [2020-12-22 10:12:54,175 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:12:54,175 INFO L276 IsEmpty]: Start isEmpty. Operand 29039 states and 40460 transitions. [2020-12-22 10:12:54,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 10:12:54,177 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:12:54,177 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:12:54,177 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 10:12:54,177 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:12:54,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:12:54,178 INFO L82 PathProgramCache]: Analyzing trace with hash 705405902, now seen corresponding path program 1 times [2020-12-22 10:12:54,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:12:54,179 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202370410] [2020-12-22 10:12:54,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:12:54,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:12:54,280 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 10:12:54,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202370410] [2020-12-22 10:12:54,281 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:12:54,281 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:12:54,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645809645] [2020-12-22 10:12:54,282 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 10:12:54,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:12:54,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 10:12:54,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 10:12:54,283 INFO L87 Difference]: Start difference. First operand 29039 states and 40460 transitions. Second operand 6 states. [2020-12-22 10:12:55,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:12:55,482 INFO L93 Difference]: Finished difference Result 46001 states and 65485 transitions. [2020-12-22 10:12:55,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 10:12:55,483 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 94 [2020-12-22 10:12:55,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:12:55,525 INFO L225 Difference]: With dead ends: 46001 [2020-12-22 10:12:55,525 INFO L226 Difference]: Without dead ends: 29039 [2020-12-22 10:12:55,552 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 10:12:55,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29039 states. [2020-12-22 10:12:56,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29039 to 29039. [2020-12-22 10:12:56,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29039 states. [2020-12-22 10:12:56,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29039 states to 29039 states and 40204 transitions. [2020-12-22 10:12:56,742 INFO L78 Accepts]: Start accepts. Automaton has 29039 states and 40204 transitions. Word has length 94 [2020-12-22 10:12:56,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:12:56,742 INFO L481 AbstractCegarLoop]: Abstraction has 29039 states and 40204 transitions. [2020-12-22 10:12:56,743 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 10:12:56,743 INFO L276 IsEmpty]: Start isEmpty. Operand 29039 states and 40204 transitions. [2020-12-22 10:12:56,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 10:12:56,744 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:12:56,744 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:12:56,744 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 10:12:56,744 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:12:56,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:12:56,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1549411404, now seen corresponding path program 1 times [2020-12-22 10:12:56,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:12:56,745 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836297404] [2020-12-22 10:12:56,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:12:56,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:12:56,842 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 10:12:56,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836297404] [2020-12-22 10:12:56,842 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:12:56,842 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:12:56,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293804622] [2020-12-22 10:12:56,843 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 10:12:56,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:12:56,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 10:12:56,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 10:12:56,844 INFO L87 Difference]: Start difference. First operand 29039 states and 40204 transitions. Second operand 6 states. [2020-12-22 10:12:58,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:12:58,205 INFO L93 Difference]: Finished difference Result 46001 states and 64973 transitions. [2020-12-22 10:12:58,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 10:12:58,206 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 94 [2020-12-22 10:12:58,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:12:58,236 INFO L225 Difference]: With dead ends: 46001 [2020-12-22 10:12:58,236 INFO L226 Difference]: Without dead ends: 29039 [2020-12-22 10:12:58,252 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 10:12:58,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29039 states. [2020-12-22 10:12:59,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29039 to 29039. [2020-12-22 10:12:59,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29039 states. [2020-12-22 10:12:59,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29039 states to 29039 states and 40012 transitions. [2020-12-22 10:12:59,319 INFO L78 Accepts]: Start accepts. Automaton has 29039 states and 40012 transitions. Word has length 94 [2020-12-22 10:12:59,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:12:59,320 INFO L481 AbstractCegarLoop]: Abstraction has 29039 states and 40012 transitions. [2020-12-22 10:12:59,320 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 10:12:59,320 INFO L276 IsEmpty]: Start isEmpty. Operand 29039 states and 40012 transitions. [2020-12-22 10:12:59,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 10:12:59,326 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:12:59,326 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:12:59,326 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 10:12:59,327 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:12:59,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:12:59,327 INFO L82 PathProgramCache]: Analyzing trace with hash 847811530, now seen corresponding path program 1 times [2020-12-22 10:12:59,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:12:59,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788921387] [2020-12-22 10:12:59,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:12:59,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:12:59,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:12:59,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788921387] [2020-12-22 10:12:59,456 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:12:59,456 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:12:59,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620919952] [2020-12-22 10:12:59,457 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:12:59,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:12:59,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:12:59,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:12:59,458 INFO L87 Difference]: Start difference. First operand 29039 states and 40012 transitions. Second operand 8 states. [2020-12-22 10:12:59,675 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-12-22 10:13:01,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:13:01,329 INFO L93 Difference]: Finished difference Result 43538 states and 60662 transitions. [2020-12-22 10:13:01,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:13:01,330 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 94 [2020-12-22 10:13:01,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:13:01,372 INFO L225 Difference]: With dead ends: 43538 [2020-12-22 10:13:01,372 INFO L226 Difference]: Without dead ends: 43536 [2020-12-22 10:13:01,381 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:13:01,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43536 states. [2020-12-22 10:13:02,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43536 to 29807. [2020-12-22 10:13:02,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29807 states. [2020-12-22 10:13:02,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29807 states to 29807 states and 40716 transitions. [2020-12-22 10:13:02,945 INFO L78 Accepts]: Start accepts. Automaton has 29807 states and 40716 transitions. Word has length 94 [2020-12-22 10:13:02,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:13:02,945 INFO L481 AbstractCegarLoop]: Abstraction has 29807 states and 40716 transitions. [2020-12-22 10:13:02,945 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:13:02,945 INFO L276 IsEmpty]: Start isEmpty. Operand 29807 states and 40716 transitions. [2020-12-22 10:13:02,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-12-22 10:13:02,953 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:13:02,954 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, 1, 1, 1, 1, 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 10:13:02,954 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 10:13:02,954 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:13:02,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:13:02,955 INFO L82 PathProgramCache]: Analyzing trace with hash 973986329, now seen corresponding path program 1 times [2020-12-22 10:13:02,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:13:02,955 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921463169] [2020-12-22 10:13:02,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:13:02,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:13:03,044 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:13:03,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921463169] [2020-12-22 10:13:03,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:13:03,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 10:13:03,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325942397] [2020-12-22 10:13:03,047 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:13:03,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:13:03,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:13:03,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:13:03,048 INFO L87 Difference]: Start difference. First operand 29807 states and 40716 transitions. Second operand 3 states. [2020-12-22 10:13:10,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:13:10,718 INFO L93 Difference]: Finished difference Result 51588 states and 69008 transitions. [2020-12-22 10:13:10,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:13:10,725 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 125 [2020-12-22 10:13:10,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:13:10,765 INFO L225 Difference]: With dead ends: 51588 [2020-12-22 10:13:10,765 INFO L226 Difference]: Without dead ends: 39570 [2020-12-22 10:13:10,777 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:13:10,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39570 states. [2020-12-22 10:13:12,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39570 to 37317. [2020-12-22 10:13:12,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37317 states. [2020-12-22 10:13:12,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37317 states to 37317 states and 48814 transitions. [2020-12-22 10:13:12,118 INFO L78 Accepts]: Start accepts. Automaton has 37317 states and 48814 transitions. Word has length 125 [2020-12-22 10:13:12,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:13:12,118 INFO L481 AbstractCegarLoop]: Abstraction has 37317 states and 48814 transitions. [2020-12-22 10:13:12,118 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:13:12,118 INFO L276 IsEmpty]: Start isEmpty. Operand 37317 states and 48814 transitions. [2020-12-22 10:13:12,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-22 10:13:12,128 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:13:12,129 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 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 10:13:12,129 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 10:13:12,129 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:13:12,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:13:12,130 INFO L82 PathProgramCache]: Analyzing trace with hash 101873069, now seen corresponding path program 1 times [2020-12-22 10:13:12,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:13:12,130 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206101169] [2020-12-22 10:13:12,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:13:12,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:13:12,290 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-22 10:13:12,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206101169] [2020-12-22 10:13:12,291 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:13:12,291 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:13:12,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459664108] [2020-12-22 10:13:12,291 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:13:12,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:13:12,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:13:12,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:13:12,292 INFO L87 Difference]: Start difference. First operand 37317 states and 48814 transitions. Second operand 9 states. [2020-12-22 10:13:19,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:13:19,772 INFO L93 Difference]: Finished difference Result 164885 states and 230550 transitions. [2020-12-22 10:13:19,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:13:19,773 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 130 [2020-12-22 10:13:19,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:13:19,930 INFO L225 Difference]: With dead ends: 164885 [2020-12-22 10:13:19,931 INFO L226 Difference]: Without dead ends: 147155 [2020-12-22 10:13:19,966 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:13:20,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147155 states. [2020-12-22 10:13:23,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147155 to 55045. [2020-12-22 10:13:23,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55045 states. [2020-12-22 10:13:23,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55045 states to 55045 states and 73902 transitions. [2020-12-22 10:13:23,517 INFO L78 Accepts]: Start accepts. Automaton has 55045 states and 73902 transitions. Word has length 130 [2020-12-22 10:13:23,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:13:23,518 INFO L481 AbstractCegarLoop]: Abstraction has 55045 states and 73902 transitions. [2020-12-22 10:13:23,518 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:13:23,518 INFO L276 IsEmpty]: Start isEmpty. Operand 55045 states and 73902 transitions. [2020-12-22 10:13:23,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-22 10:13:23,533 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:13:23,533 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 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 10:13:23,533 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 10:13:23,533 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:13:23,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:13:23,534 INFO L82 PathProgramCache]: Analyzing trace with hash 1349380685, now seen corresponding path program 1 times [2020-12-22 10:13:23,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:13:23,534 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513399317] [2020-12-22 10:13:23,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:13:23,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:13:23,705 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-22 10:13:23,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513399317] [2020-12-22 10:13:23,705 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:13:23,705 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:13:23,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540290049] [2020-12-22 10:13:23,706 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:13:23,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:13:23,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:13:23,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:13:23,707 INFO L87 Difference]: Start difference. First operand 55045 states and 73902 transitions. Second operand 9 states. [2020-12-22 10:13:33,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:13:33,135 INFO L93 Difference]: Finished difference Result 182613 states and 255638 transitions. [2020-12-22 10:13:33,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:13:33,136 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 130 [2020-12-22 10:13:33,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:13:33,341 INFO L225 Difference]: With dead ends: 182613 [2020-12-22 10:13:33,341 INFO L226 Difference]: Without dead ends: 164883 [2020-12-22 10:13:33,385 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:13:33,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164883 states. [2020-12-22 10:13:38,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164883 to 81669. [2020-12-22 10:13:38,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81669 states. [2020-12-22 10:13:39,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81669 states to 81669 states and 111374 transitions. [2020-12-22 10:13:39,041 INFO L78 Accepts]: Start accepts. Automaton has 81669 states and 111374 transitions. Word has length 130 [2020-12-22 10:13:39,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:13:39,042 INFO L481 AbstractCegarLoop]: Abstraction has 81669 states and 111374 transitions. [2020-12-22 10:13:39,042 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:13:39,042 INFO L276 IsEmpty]: Start isEmpty. Operand 81669 states and 111374 transitions. [2020-12-22 10:13:39,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-22 10:13:39,060 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:13:39,060 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 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, 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 10:13:39,060 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 10:13:39,060 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:13:39,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:13:39,061 INFO L82 PathProgramCache]: Analyzing trace with hash -1476153629, now seen corresponding path program 1 times [2020-12-22 10:13:39,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:13:39,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453102271] [2020-12-22 10:13:39,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:13:39,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:13:39,252 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 10:13:39,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453102271] [2020-12-22 10:13:39,252 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:13:39,253 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:13:39,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377484366] [2020-12-22 10:13:39,253 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:13:39,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:13:39,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:13:39,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:13:39,254 INFO L87 Difference]: Start difference. First operand 81669 states and 111374 transitions. Second operand 9 states. [2020-12-22 10:13:50,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:13:50,939 INFO L93 Difference]: Finished difference Result 200341 states and 280726 transitions. [2020-12-22 10:13:50,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:13:50,948 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 130 [2020-12-22 10:13:50,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:13:51,166 INFO L225 Difference]: With dead ends: 200341 [2020-12-22 10:13:51,167 INFO L226 Difference]: Without dead ends: 182611 [2020-12-22 10:13:51,219 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:13:51,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182611 states. [2020-12-22 10:13:58,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182611 to 99397. [2020-12-22 10:13:58,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99397 states. [2020-12-22 10:13:58,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99397 states to 99397 states and 136462 transitions. [2020-12-22 10:13:58,429 INFO L78 Accepts]: Start accepts. Automaton has 99397 states and 136462 transitions. Word has length 130 [2020-12-22 10:13:58,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:13:58,430 INFO L481 AbstractCegarLoop]: Abstraction has 99397 states and 136462 transitions. [2020-12-22 10:13:58,430 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:13:58,430 INFO L276 IsEmpty]: Start isEmpty. Operand 99397 states and 136462 transitions. [2020-12-22 10:13:58,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-22 10:13:58,447 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:13:58,447 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 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, 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 10:13:58,447 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 10:13:58,448 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:13:58,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:13:58,448 INFO L82 PathProgramCache]: Analyzing trace with hash 1583354627, now seen corresponding path program 1 times [2020-12-22 10:13:58,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:13:58,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349524779] [2020-12-22 10:13:58,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:13:58,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:13:58,877 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 10:13:58,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349524779] [2020-12-22 10:13:58,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:13:58,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:13:58,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070457002] [2020-12-22 10:13:58,881 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:13:58,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:13:58,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:13:58,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:13:58,883 INFO L87 Difference]: Start difference. First operand 99397 states and 136462 transitions. Second operand 9 states. [2020-12-22 10:14:12,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:14:12,691 INFO L93 Difference]: Finished difference Result 218069 states and 305814 transitions. [2020-12-22 10:14:12,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:14:12,692 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 130 [2020-12-22 10:14:12,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:14:12,973 INFO L225 Difference]: With dead ends: 218069 [2020-12-22 10:14:12,973 INFO L226 Difference]: Without dead ends: 200339 [2020-12-22 10:14:13,023 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:14:13,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200339 states. [2020-12-22 10:14:21,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200339 to 117125. [2020-12-22 10:14:21,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117125 states. [2020-12-22 10:14:22,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117125 states to 117125 states and 161550 transitions. [2020-12-22 10:14:22,006 INFO L78 Accepts]: Start accepts. Automaton has 117125 states and 161550 transitions. Word has length 130 [2020-12-22 10:14:22,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:14:22,006 INFO L481 AbstractCegarLoop]: Abstraction has 117125 states and 161550 transitions. [2020-12-22 10:14:22,007 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:14:22,007 INFO L276 IsEmpty]: Start isEmpty. Operand 117125 states and 161550 transitions. [2020-12-22 10:14:22,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-22 10:14:22,020 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:14:22,020 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 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, 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 10:14:22,020 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 10:14:22,020 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:14:22,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:14:22,021 INFO L82 PathProgramCache]: Analyzing trace with hash 162359075, now seen corresponding path program 1 times [2020-12-22 10:14:22,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:14:22,021 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674611604] [2020-12-22 10:14:22,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:14:22,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:14:22,424 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 10:14:22,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674611604] [2020-12-22 10:14:22,424 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:14:22,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:14:22,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799040058] [2020-12-22 10:14:22,425 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:14:22,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:14:22,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:14:22,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:14:22,426 INFO L87 Difference]: Start difference. First operand 117125 states and 161550 transitions. Second operand 9 states. [2020-12-22 10:14:38,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:14:38,791 INFO L93 Difference]: Finished difference Result 235797 states and 330902 transitions. [2020-12-22 10:14:38,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:14:38,792 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 130 [2020-12-22 10:14:38,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:14:39,295 INFO L225 Difference]: With dead ends: 235797 [2020-12-22 10:14:39,296 INFO L226 Difference]: Without dead ends: 218067 [2020-12-22 10:14:39,341 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:14:39,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218067 states. [2020-12-22 10:14:50,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218067 to 134853. [2020-12-22 10:14:50,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134853 states. [2020-12-22 10:14:50,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134853 states to 134853 states and 186638 transitions. [2020-12-22 10:14:50,455 INFO L78 Accepts]: Start accepts. Automaton has 134853 states and 186638 transitions. Word has length 130 [2020-12-22 10:14:50,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:14:50,455 INFO L481 AbstractCegarLoop]: Abstraction has 134853 states and 186638 transitions. [2020-12-22 10:14:50,455 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:14:50,455 INFO L276 IsEmpty]: Start isEmpty. Operand 134853 states and 186638 transitions. [2020-12-22 10:14:50,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-22 10:14:50,469 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:14:50,470 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 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, 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 10:14:50,470 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-12-22 10:14:50,470 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:14:50,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:14:50,470 INFO L82 PathProgramCache]: Analyzing trace with hash -403461309, now seen corresponding path program 1 times [2020-12-22 10:14:50,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:14:50,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512487158] [2020-12-22 10:14:50,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:14:50,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:14:50,652 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 10:14:50,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512487158] [2020-12-22 10:14:50,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:14:50,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:14:50,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103614492] [2020-12-22 10:14:50,654 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:14:50,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:14:50,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:14:50,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:14:50,655 INFO L87 Difference]: Start difference. First operand 134853 states and 186638 transitions. Second operand 9 states. [2020-12-22 10:15:10,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:15:10,975 INFO L93 Difference]: Finished difference Result 253525 states and 355990 transitions. [2020-12-22 10:15:10,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:15:10,976 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 130 [2020-12-22 10:15:10,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:15:11,510 INFO L225 Difference]: With dead ends: 253525 [2020-12-22 10:15:11,510 INFO L226 Difference]: Without dead ends: 235795 [2020-12-22 10:15:11,566 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:15:11,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235795 states. [2020-12-22 10:15:25,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235795 to 152581. [2020-12-22 10:15:25,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152581 states. [2020-12-22 10:15:25,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152581 states to 152581 states and 211726 transitions. [2020-12-22 10:15:25,690 INFO L78 Accepts]: Start accepts. Automaton has 152581 states and 211726 transitions. Word has length 130 [2020-12-22 10:15:25,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:15:25,700 INFO L481 AbstractCegarLoop]: Abstraction has 152581 states and 211726 transitions. [2020-12-22 10:15:25,700 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:15:25,700 INFO L276 IsEmpty]: Start isEmpty. Operand 152581 states and 211726 transitions. [2020-12-22 10:15:25,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-22 10:15:25,722 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:15:25,722 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 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, 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 10:15:25,722 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-12-22 10:15:25,722 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:15:25,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:15:25,723 INFO L82 PathProgramCache]: Analyzing trace with hash -214245533, now seen corresponding path program 1 times [2020-12-22 10:15:25,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:15:25,724 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112201080] [2020-12-22 10:15:25,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:15:25,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:15:25,922 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 10:15:25,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112201080] [2020-12-22 10:15:25,922 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:15:25,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:15:25,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536851813] [2020-12-22 10:15:25,923 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:15:25,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:15:25,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:15:25,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:15:25,924 INFO L87 Difference]: Start difference. First operand 152581 states and 211726 transitions. Second operand 9 states.