/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.6.ufo.BOUNDED-12.pals+Problem12_label09.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 10:05:12,233 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 10:05:12,236 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 10:05:12,274 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 10:05:12,274 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 10:05:12,276 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 10:05:12,278 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 10:05:12,280 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 10:05:12,296 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 10:05:12,297 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 10:05:12,298 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 10:05:12,300 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 10:05:12,300 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 10:05:12,302 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 10:05:12,303 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 10:05:12,304 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 10:05:12,305 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 10:05:12,306 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 10:05:12,308 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 10:05:12,311 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 10:05:12,313 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 10:05:12,315 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 10:05:12,316 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 10:05:12,317 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 10:05:12,321 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 10:05:12,331 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 10:05:12,333 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 10:05:12,334 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 10:05:12,336 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 10:05:12,364 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 10:05:12,365 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 10:05:12,366 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 10:05:12,367 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 10:05:12,367 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 10:05:12,367 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 10:05:12,368 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 10:05:12,368 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 10:05:12,368 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 10:05:12,369 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 10:05:12,369 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 10:05:12,369 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 10:05:12,370 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 10:05:12,370 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 10:05:12,370 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 10:05:12,371 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 10:05:12,371 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 10:05:12,371 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 10:05:12,372 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 10:05:12,372 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 10:05:12,372 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 10:05:12,373 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 10:05:12,373 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 10:05:12,373 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 10:05:12,373 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 10:05:12,374 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 10:05:12,787 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 10:05:12,820 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 10:05:12,823 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 10:05:12,824 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 10:05:12,825 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 10:05:12,826 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.6.ufo.BOUNDED-12.pals+Problem12_label09.c [2020-12-22 10:05:12,911 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e72935269/b38bda2d9d8f42369ad3e437c2bbf2a1/FLAG90b38b726 [2020-12-22 10:05:13,924 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 10:05:13,925 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.6.ufo.BOUNDED-12.pals+Problem12_label09.c [2020-12-22 10:05:13,977 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e72935269/b38bda2d9d8f42369ad3e437c2bbf2a1/FLAG90b38b726 [2020-12-22 10:05:14,369 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e72935269/b38bda2d9d8f42369ad3e437c2bbf2a1 [2020-12-22 10:05:14,372 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 10:05:14,376 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 10:05:14,380 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 10:05:14,380 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 10:05:14,385 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 10:05:14,387 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:05:14" (1/1) ... [2020-12-22 10:05:14,389 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ba104a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:05:14, skipping insertion in model container [2020-12-22 10:05:14,389 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:05:14" (1/1) ... [2020-12-22 10:05:14,398 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 10:05:14,596 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 10:05:14,968 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.6.ufo.BOUNDED-12.pals+Problem12_label09.c[15586,15599] [2020-12-22 10:05:15,057 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.6.ufo.BOUNDED-12.pals+Problem12_label09.c[23091,23104] [2020-12-22 10:05:15,976 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:05:15,992 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 10:05:16,078 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.6.ufo.BOUNDED-12.pals+Problem12_label09.c[15586,15599] [2020-12-22 10:05:16,099 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.6.ufo.BOUNDED-12.pals+Problem12_label09.c[23091,23104] [2020-12-22 10:05:17,037 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:05:17,081 INFO L208 MainTranslator]: Completed translation [2020-12-22 10:05:17,081 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:05:17 WrapperNode [2020-12-22 10:05:17,082 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 10:05:17,084 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 10:05:17,085 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 10:05:17,085 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 10:05:17,094 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:05:17" (1/1) ... [2020-12-22 10:05:17,180 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:05:17" (1/1) ... [2020-12-22 10:05:17,523 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 10:05:17,524 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 10:05:17,524 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 10:05:17,524 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 10:05:17,534 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:05:17" (1/1) ... [2020-12-22 10:05:17,534 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:05:17" (1/1) ... [2020-12-22 10:05:17,600 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:05:17" (1/1) ... [2020-12-22 10:05:17,600 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:05:17" (1/1) ... [2020-12-22 10:05:17,859 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:05:17" (1/1) ... [2020-12-22 10:05:17,910 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:05:17" (1/1) ... [2020-12-22 10:05:18,038 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:05:17" (1/1) ... [2020-12-22 10:05:18,097 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 10:05:18,098 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 10:05:18,098 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 10:05:18,098 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 10:05:18,099 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:05:17" (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 10:05:18,208 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 10:05:18,209 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 10:05:18,209 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 10:05:18,209 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 10:05:23,716 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 10:05:23,717 INFO L299 CfgBuilder]: Removed 38 assume(true) statements. [2020-12-22 10:05:23,721 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:05:23 BoogieIcfgContainer [2020-12-22 10:05:23,721 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 10:05:23,723 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 10:05:23,723 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 10:05:23,727 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 10:05:23,727 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 10:05:14" (1/3) ... [2020-12-22 10:05:23,728 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9f0105c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:05:23, skipping insertion in model container [2020-12-22 10:05:23,728 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:05:17" (2/3) ... [2020-12-22 10:05:23,729 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9f0105c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:05:23, skipping insertion in model container [2020-12-22 10:05:23,729 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:05:23" (3/3) ... [2020-12-22 10:05:23,731 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.6.ufo.BOUNDED-12.pals+Problem12_label09.c [2020-12-22 10:05:23,738 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 10:05:23,744 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 10:05:23,765 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 10:05:23,857 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 10:05:23,857 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 10:05:23,857 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 10:05:23,858 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 10:05:23,858 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 10:05:23,858 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 10:05:23,858 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 10:05:23,858 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 10:05:23,900 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states. [2020-12-22 10:05:23,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-22 10:05:23,911 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:05:23,912 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] [2020-12-22 10:05:23,913 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:05:23,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:05:23,921 INFO L82 PathProgramCache]: Analyzing trace with hash 340623278, now seen corresponding path program 1 times [2020-12-22 10:05:23,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:05:23,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209023785] [2020-12-22 10:05:23,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:05:24,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:05:24,235 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 10:05:24,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209023785] [2020-12-22 10:05:24,238 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:05:24,238 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 10:05:24,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557628662] [2020-12-22 10:05:24,250 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 10:05:24,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:05:24,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 10:05:24,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 10:05:24,274 INFO L87 Difference]: Start difference. First operand 926 states. Second operand 2 states. [2020-12-22 10:05:24,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:05:24,367 INFO L93 Difference]: Finished difference Result 1806 states and 3418 transitions. [2020-12-22 10:05:24,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 10:05:24,368 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 38 [2020-12-22 10:05:24,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:05:24,393 INFO L225 Difference]: With dead ends: 1806 [2020-12-22 10:05:24,393 INFO L226 Difference]: Without dead ends: 860 [2020-12-22 10:05:24,402 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 10:05:24,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 860 states. [2020-12-22 10:05:24,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 860 to 860. [2020-12-22 10:05:24,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 860 states. [2020-12-22 10:05:24,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 1620 transitions. [2020-12-22 10:05:24,518 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 1620 transitions. Word has length 38 [2020-12-22 10:05:24,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:05:24,518 INFO L481 AbstractCegarLoop]: Abstraction has 860 states and 1620 transitions. [2020-12-22 10:05:24,518 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 10:05:24,519 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 1620 transitions. [2020-12-22 10:05:24,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-22 10:05:24,527 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:05:24,527 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] [2020-12-22 10:05:24,528 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 10:05:24,528 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:05:24,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:05:24,529 INFO L82 PathProgramCache]: Analyzing trace with hash 615382892, now seen corresponding path program 1 times [2020-12-22 10:05:24,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:05:24,530 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902851837] [2020-12-22 10:05:24,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:05:24,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:05:24,755 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 10:05:24,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902851837] [2020-12-22 10:05:24,756 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:05:24,756 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:05:24,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124199181] [2020-12-22 10:05:24,758 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 10:05:24,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:05:24,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 10:05:24,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 10:05:24,760 INFO L87 Difference]: Start difference. First operand 860 states and 1620 transitions. Second operand 5 states. [2020-12-22 10:05:24,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:05:24,906 INFO L93 Difference]: Finished difference Result 924 states and 1719 transitions. [2020-12-22 10:05:24,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 10:05:24,906 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 38 [2020-12-22 10:05:24,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:05:24,913 INFO L225 Difference]: With dead ends: 924 [2020-12-22 10:05:24,913 INFO L226 Difference]: Without dead ends: 860 [2020-12-22 10:05:24,915 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 10:05:24,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 860 states. [2020-12-22 10:05:24,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 860 to 860. [2020-12-22 10:05:24,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 860 states. [2020-12-22 10:05:24,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 1580 transitions. [2020-12-22 10:05:24,941 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 1580 transitions. Word has length 38 [2020-12-22 10:05:24,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:05:24,942 INFO L481 AbstractCegarLoop]: Abstraction has 860 states and 1580 transitions. [2020-12-22 10:05:24,942 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 10:05:24,942 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 1580 transitions. [2020-12-22 10:05:24,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 10:05:24,944 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:05:24,944 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:05:24,945 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 10:05:24,945 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:05:24,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:05:24,946 INFO L82 PathProgramCache]: Analyzing trace with hash -1788791084, now seen corresponding path program 1 times [2020-12-22 10:05:24,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:05:24,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929537593] [2020-12-22 10:05:24,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:05:24,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:05:25,170 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 10:05:25,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929537593] [2020-12-22 10:05:25,172 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:05:25,172 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:05:25,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210901560] [2020-12-22 10:05:25,173 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 10:05:25,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:05:25,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 10:05:25,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 10:05:25,174 INFO L87 Difference]: Start difference. First operand 860 states and 1580 transitions. Second operand 4 states. [2020-12-22 10:05:36,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:05:36,697 INFO L93 Difference]: Finished difference Result 3115 states and 5889 transitions. [2020-12-22 10:05:36,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 10:05:36,698 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 67 [2020-12-22 10:05:36,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:05:36,713 INFO L225 Difference]: With dead ends: 3115 [2020-12-22 10:05:36,713 INFO L226 Difference]: Without dead ends: 2362 [2020-12-22 10:05:36,715 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 10:05:36,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2362 states. [2020-12-22 10:05:36,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2362 to 2362. [2020-12-22 10:05:36,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2362 states. [2020-12-22 10:05:36,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2362 states to 2362 states and 3694 transitions. [2020-12-22 10:05:36,781 INFO L78 Accepts]: Start accepts. Automaton has 2362 states and 3694 transitions. Word has length 67 [2020-12-22 10:05:36,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:05:36,782 INFO L481 AbstractCegarLoop]: Abstraction has 2362 states and 3694 transitions. [2020-12-22 10:05:36,782 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 10:05:36,782 INFO L276 IsEmpty]: Start isEmpty. Operand 2362 states and 3694 transitions. [2020-12-22 10:05:36,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 10:05:36,784 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:05:36,785 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:05:36,785 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 10:05:36,785 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:05:36,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:05:36,786 INFO L82 PathProgramCache]: Analyzing trace with hash -2101054792, now seen corresponding path program 1 times [2020-12-22 10:05:36,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:05:36,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029154709] [2020-12-22 10:05:36,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:05:36,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:05:36,931 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 10:05:36,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029154709] [2020-12-22 10:05:36,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:05:36,932 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:05:36,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831079052] [2020-12-22 10:05:36,932 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:05:36,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:05:36,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:05:36,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:05:36,934 INFO L87 Difference]: Start difference. First operand 2362 states and 3694 transitions. Second operand 3 states. [2020-12-22 10:05:36,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:05:36,982 INFO L93 Difference]: Finished difference Result 2476 states and 3874 transitions. [2020-12-22 10:05:36,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:05:36,983 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 77 [2020-12-22 10:05:36,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:05:36,997 INFO L225 Difference]: With dead ends: 2476 [2020-12-22 10:05:36,997 INFO L226 Difference]: Without dead ends: 2416 [2020-12-22 10:05:36,998 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 10:05:37,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2416 states. [2020-12-22 10:05:37,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2416 to 2414. [2020-12-22 10:05:37,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2414 states. [2020-12-22 10:05:37,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2414 states to 2414 states and 3777 transitions. [2020-12-22 10:05:37,063 INFO L78 Accepts]: Start accepts. Automaton has 2414 states and 3777 transitions. Word has length 77 [2020-12-22 10:05:37,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:05:37,064 INFO L481 AbstractCegarLoop]: Abstraction has 2414 states and 3777 transitions. [2020-12-22 10:05:37,064 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:05:37,064 INFO L276 IsEmpty]: Start isEmpty. Operand 2414 states and 3777 transitions. [2020-12-22 10:05:37,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 10:05:37,066 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:05:37,067 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:05:37,067 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 10:05:37,067 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:05:37,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:05:37,068 INFO L82 PathProgramCache]: Analyzing trace with hash 1452480302, now seen corresponding path program 1 times [2020-12-22 10:05:37,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:05:37,068 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939166120] [2020-12-22 10:05:37,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:05:37,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:05:37,149 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 10:05:37,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939166120] [2020-12-22 10:05:37,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:05:37,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:05:37,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637594103] [2020-12-22 10:05:37,151 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:05:37,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:05:37,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:05:37,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:05:37,152 INFO L87 Difference]: Start difference. First operand 2414 states and 3777 transitions. Second operand 3 states. [2020-12-22 10:05:37,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:05:37,204 INFO L93 Difference]: Finished difference Result 2626 states and 4113 transitions. [2020-12-22 10:05:37,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:05:37,205 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 77 [2020-12-22 10:05:37,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:05:37,219 INFO L225 Difference]: With dead ends: 2626 [2020-12-22 10:05:37,220 INFO L226 Difference]: Without dead ends: 2514 [2020-12-22 10:05:37,221 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 10:05:37,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2514 states. [2020-12-22 10:05:37,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2514 to 2512. [2020-12-22 10:05:37,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2512 states. [2020-12-22 10:05:37,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2512 states to 2512 states and 3932 transitions. [2020-12-22 10:05:37,287 INFO L78 Accepts]: Start accepts. Automaton has 2512 states and 3932 transitions. Word has length 77 [2020-12-22 10:05:37,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:05:37,287 INFO L481 AbstractCegarLoop]: Abstraction has 2512 states and 3932 transitions. [2020-12-22 10:05:37,287 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:05:37,288 INFO L276 IsEmpty]: Start isEmpty. Operand 2512 states and 3932 transitions. [2020-12-22 10:05:37,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 10:05:37,289 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:05:37,289 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:05:37,289 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 10:05:37,289 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:05:37,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:05:37,290 INFO L82 PathProgramCache]: Analyzing trace with hash -1624501596, now seen corresponding path program 1 times [2020-12-22 10:05:37,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:05:37,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807868112] [2020-12-22 10:05:37,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:05:37,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:05:37,453 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 10:05:37,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807868112] [2020-12-22 10:05:37,454 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:05:37,454 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:05:37,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804000331] [2020-12-22 10:05:37,455 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:05:37,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:05:37,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:05:37,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:05:37,456 INFO L87 Difference]: Start difference. First operand 2512 states and 3932 transitions. Second operand 8 states. [2020-12-22 10:05:37,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:05:37,911 INFO L93 Difference]: Finished difference Result 5032 states and 7928 transitions. [2020-12-22 10:05:37,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 10:05:37,912 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 77 [2020-12-22 10:05:37,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:05:37,943 INFO L225 Difference]: With dead ends: 5032 [2020-12-22 10:05:37,943 INFO L226 Difference]: Without dead ends: 4822 [2020-12-22 10:05:37,949 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:05:37,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4822 states. [2020-12-22 10:05:38,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4822 to 2720. [2020-12-22 10:05:38,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2720 states. [2020-12-22 10:05:38,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2720 states to 2720 states and 4256 transitions. [2020-12-22 10:05:38,069 INFO L78 Accepts]: Start accepts. Automaton has 2720 states and 4256 transitions. Word has length 77 [2020-12-22 10:05:38,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:05:38,071 INFO L481 AbstractCegarLoop]: Abstraction has 2720 states and 4256 transitions. [2020-12-22 10:05:38,071 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:05:38,071 INFO L276 IsEmpty]: Start isEmpty. Operand 2720 states and 4256 transitions. [2020-12-22 10:05:38,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 10:05:38,073 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:05:38,073 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:05:38,074 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 10:05:38,075 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:05:38,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:05:38,080 INFO L82 PathProgramCache]: Analyzing trace with hash 806369108, now seen corresponding path program 1 times [2020-12-22 10:05:38,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:05:38,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379689146] [2020-12-22 10:05:38,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:05:38,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:05:38,206 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 10:05:38,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379689146] [2020-12-22 10:05:38,208 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:05:38,208 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:05:38,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575484480] [2020-12-22 10:05:38,208 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:05:38,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:05:38,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:05:38,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:05:38,220 INFO L87 Difference]: Start difference. First operand 2720 states and 4256 transitions. Second operand 3 states. [2020-12-22 10:05:38,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:05:38,301 INFO L93 Difference]: Finished difference Result 3340 states and 5228 transitions. [2020-12-22 10:05:38,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:05:38,302 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 79 [2020-12-22 10:05:38,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:05:38,317 INFO L225 Difference]: With dead ends: 3340 [2020-12-22 10:05:38,318 INFO L226 Difference]: Without dead ends: 2922 [2020-12-22 10:05:38,321 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 10:05:38,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2922 states. [2020-12-22 10:05:38,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2922 to 2920. [2020-12-22 10:05:38,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2920 states. [2020-12-22 10:05:38,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2920 states to 2920 states and 4564 transitions. [2020-12-22 10:05:38,429 INFO L78 Accepts]: Start accepts. Automaton has 2920 states and 4564 transitions. Word has length 79 [2020-12-22 10:05:38,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:05:38,430 INFO L481 AbstractCegarLoop]: Abstraction has 2920 states and 4564 transitions. [2020-12-22 10:05:38,431 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:05:38,431 INFO L276 IsEmpty]: Start isEmpty. Operand 2920 states and 4564 transitions. [2020-12-22 10:05:38,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 10:05:38,432 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:05:38,432 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:05:38,432 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 10:05:38,433 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:05:38,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:05:38,433 INFO L82 PathProgramCache]: Analyzing trace with hash 872862620, now seen corresponding path program 1 times [2020-12-22 10:05:38,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:05:38,434 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496235711] [2020-12-22 10:05:38,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:05:38,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:05:38,754 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 10:05:38,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496235711] [2020-12-22 10:05:38,755 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:05:38,755 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:05:38,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986482432] [2020-12-22 10:05:38,756 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:05:38,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:05:38,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:05:38,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:05:38,757 INFO L87 Difference]: Start difference. First operand 2920 states and 4564 transitions. Second operand 8 states. [2020-12-22 10:05:39,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:05:39,138 INFO L93 Difference]: Finished difference Result 3538 states and 5528 transitions. [2020-12-22 10:05:39,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:05:39,138 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 79 [2020-12-22 10:05:39,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:05:39,156 INFO L225 Difference]: With dead ends: 3538 [2020-12-22 10:05:39,156 INFO L226 Difference]: Without dead ends: 2922 [2020-12-22 10:05:39,159 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2020-12-22 10:05:39,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2922 states. [2020-12-22 10:05:39,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2922 to 2920. [2020-12-22 10:05:39,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2920 states. [2020-12-22 10:05:39,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2920 states to 2920 states and 4558 transitions. [2020-12-22 10:05:39,275 INFO L78 Accepts]: Start accepts. Automaton has 2920 states and 4558 transitions. Word has length 79 [2020-12-22 10:05:39,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:05:39,275 INFO L481 AbstractCegarLoop]: Abstraction has 2920 states and 4558 transitions. [2020-12-22 10:05:39,275 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:05:39,276 INFO L276 IsEmpty]: Start isEmpty. Operand 2920 states and 4558 transitions. [2020-12-22 10:05:39,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 10:05:39,283 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:05:39,283 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:05:39,283 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 10:05:39,285 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:05:39,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:05:39,286 INFO L82 PathProgramCache]: Analyzing trace with hash -385682984, now seen corresponding path program 1 times [2020-12-22 10:05:39,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:05:39,291 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447892074] [2020-12-22 10:05:39,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:05:39,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:05:39,367 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 10:05:39,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447892074] [2020-12-22 10:05:39,369 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:05:39,369 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:05:39,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710361831] [2020-12-22 10:05:39,370 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:05:39,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:05:39,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:05:39,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:05:39,372 INFO L87 Difference]: Start difference. First operand 2920 states and 4558 transitions. Second operand 3 states. [2020-12-22 10:05:39,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:05:39,538 INFO L93 Difference]: Finished difference Result 4080 states and 6352 transitions. [2020-12-22 10:05:39,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:05:39,539 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 79 [2020-12-22 10:05:39,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:05:39,571 INFO L225 Difference]: With dead ends: 4080 [2020-12-22 10:05:39,572 INFO L226 Difference]: Without dead ends: 3464 [2020-12-22 10:05:39,575 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 10:05:39,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3464 states. [2020-12-22 10:05:39,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3464 to 3462. [2020-12-22 10:05:39,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3462 states. [2020-12-22 10:05:39,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3462 states to 3462 states and 5382 transitions. [2020-12-22 10:05:39,756 INFO L78 Accepts]: Start accepts. Automaton has 3462 states and 5382 transitions. Word has length 79 [2020-12-22 10:05:39,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:05:39,757 INFO L481 AbstractCegarLoop]: Abstraction has 3462 states and 5382 transitions. [2020-12-22 10:05:39,757 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:05:39,757 INFO L276 IsEmpty]: Start isEmpty. Operand 3462 states and 5382 transitions. [2020-12-22 10:05:39,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 10:05:39,759 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:05:39,759 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:05:39,759 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 10:05:39,759 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:05:39,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:05:39,760 INFO L82 PathProgramCache]: Analyzing trace with hash -111995272, now seen corresponding path program 1 times [2020-12-22 10:05:39,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:05:39,761 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935771486] [2020-12-22 10:05:39,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:05:39,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:05:39,838 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 10:05:39,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935771486] [2020-12-22 10:05:39,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:05:39,839 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:05:39,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571594129] [2020-12-22 10:05:39,839 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:05:39,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:05:39,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:05:39,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:05:39,844 INFO L87 Difference]: Start difference. First operand 3462 states and 5382 transitions. Second operand 3 states. [2020-12-22 10:05:40,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:05:40,061 INFO L93 Difference]: Finished difference Result 5634 states and 8704 transitions. [2020-12-22 10:05:40,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:05:40,061 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 79 [2020-12-22 10:05:40,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:05:40,083 INFO L225 Difference]: With dead ends: 5634 [2020-12-22 10:05:40,084 INFO L226 Difference]: Without dead ends: 4476 [2020-12-22 10:05:40,088 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 10:05:40,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4476 states. [2020-12-22 10:05:40,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4476 to 4474. [2020-12-22 10:05:40,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4474 states. [2020-12-22 10:05:40,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4474 states to 4474 states and 6898 transitions. [2020-12-22 10:05:40,336 INFO L78 Accepts]: Start accepts. Automaton has 4474 states and 6898 transitions. Word has length 79 [2020-12-22 10:05:40,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:05:40,336 INFO L481 AbstractCegarLoop]: Abstraction has 4474 states and 6898 transitions. [2020-12-22 10:05:40,336 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:05:40,337 INFO L276 IsEmpty]: Start isEmpty. Operand 4474 states and 6898 transitions. [2020-12-22 10:05:40,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 10:05:40,338 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:05:40,338 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:05:40,338 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 10:05:40,338 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:05:40,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:05:40,339 INFO L82 PathProgramCache]: Analyzing trace with hash 1707076376, now seen corresponding path program 1 times [2020-12-22 10:05:40,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:05:40,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358906251] [2020-12-22 10:05:40,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:05:40,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:05:40,408 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 10:05:40,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358906251] [2020-12-22 10:05:40,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:05:40,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:05:40,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539131213] [2020-12-22 10:05:40,410 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:05:40,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:05:40,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:05:40,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:05:40,413 INFO L87 Difference]: Start difference. First operand 4474 states and 6898 transitions. Second operand 3 states. [2020-12-22 10:05:40,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:05:40,759 INFO L93 Difference]: Finished difference Result 8526 states and 13012 transitions. [2020-12-22 10:05:40,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:05:40,760 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 79 [2020-12-22 10:05:40,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:05:40,777 INFO L225 Difference]: With dead ends: 8526 [2020-12-22 10:05:40,778 INFO L226 Difference]: Without dead ends: 6356 [2020-12-22 10:05:40,784 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 10:05:40,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6356 states. [2020-12-22 10:05:41,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6356 to 6354. [2020-12-22 10:05:41,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6354 states. [2020-12-22 10:05:41,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6354 states to 6354 states and 9666 transitions. [2020-12-22 10:05:41,143 INFO L78 Accepts]: Start accepts. Automaton has 6354 states and 9666 transitions. Word has length 79 [2020-12-22 10:05:41,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:05:41,143 INFO L481 AbstractCegarLoop]: Abstraction has 6354 states and 9666 transitions. [2020-12-22 10:05:41,143 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:05:41,144 INFO L276 IsEmpty]: Start isEmpty. Operand 6354 states and 9666 transitions. [2020-12-22 10:05:41,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 10:05:41,145 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:05:41,145 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:05:41,145 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 10:05:41,145 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:05:41,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:05:41,146 INFO L82 PathProgramCache]: Analyzing trace with hash 1886482360, now seen corresponding path program 1 times [2020-12-22 10:05:41,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:05:41,146 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325224416] [2020-12-22 10:05:41,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:05:41,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:05:41,203 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 10:05:41,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325224416] [2020-12-22 10:05:41,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:05:41,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:05:41,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935629321] [2020-12-22 10:05:41,205 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:05:41,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:05:41,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:05:41,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:05:41,206 INFO L87 Difference]: Start difference. First operand 6354 states and 9666 transitions. Second operand 3 states. [2020-12-22 10:05:41,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:05:41,722 INFO L93 Difference]: Finished difference Result 13878 states and 20836 transitions. [2020-12-22 10:05:41,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:05:41,723 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 79 [2020-12-22 10:05:41,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:05:41,746 INFO L225 Difference]: With dead ends: 13878 [2020-12-22 10:05:41,746 INFO L226 Difference]: Without dead ends: 9828 [2020-12-22 10:05:41,755 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 10:05:41,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9828 states. [2020-12-22 10:05:42,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9828 to 9826. [2020-12-22 10:05:42,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9826 states. [2020-12-22 10:05:42,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9826 states to 9826 states and 14674 transitions. [2020-12-22 10:05:42,451 INFO L78 Accepts]: Start accepts. Automaton has 9826 states and 14674 transitions. Word has length 79 [2020-12-22 10:05:42,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:05:42,451 INFO L481 AbstractCegarLoop]: Abstraction has 9826 states and 14674 transitions. [2020-12-22 10:05:42,451 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:05:42,451 INFO L276 IsEmpty]: Start isEmpty. Operand 9826 states and 14674 transitions. [2020-12-22 10:05:42,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 10:05:42,452 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:05:42,453 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:05:42,453 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 10:05:42,453 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:05:42,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:05:42,454 INFO L82 PathProgramCache]: Analyzing trace with hash 874214487, now seen corresponding path program 1 times [2020-12-22 10:05:42,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:05:42,454 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341322371] [2020-12-22 10:05:42,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:05:42,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:05:42,581 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 10:05:42,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341322371] [2020-12-22 10:05:42,582 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:05:42,582 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:05:42,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044760180] [2020-12-22 10:05:42,583 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:05:42,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:05:42,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:05:42,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:05:42,584 INFO L87 Difference]: Start difference. First operand 9826 states and 14674 transitions. Second operand 8 states. [2020-12-22 10:05:43,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:05:43,816 INFO L93 Difference]: Finished difference Result 16289 states and 23945 transitions. [2020-12-22 10:05:43,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:05:43,817 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 80 [2020-12-22 10:05:43,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:05:43,856 INFO L225 Difference]: With dead ends: 16289 [2020-12-22 10:05:43,857 INFO L226 Difference]: Without dead ends: 16287 [2020-12-22 10:05:43,865 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:05:43,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16287 states. [2020-12-22 10:05:44,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16287 to 10210. [2020-12-22 10:05:44,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10210 states. [2020-12-22 10:05:44,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10210 states to 10210 states and 15026 transitions. [2020-12-22 10:05:44,857 INFO L78 Accepts]: Start accepts. Automaton has 10210 states and 15026 transitions. Word has length 80 [2020-12-22 10:05:44,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:05:44,857 INFO L481 AbstractCegarLoop]: Abstraction has 10210 states and 15026 transitions. [2020-12-22 10:05:44,858 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:05:44,858 INFO L276 IsEmpty]: Start isEmpty. Operand 10210 states and 15026 transitions. [2020-12-22 10:05:44,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 10:05:44,864 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:05:44,865 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 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] [2020-12-22 10:05:44,865 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 10:05:44,865 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:05:44,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:05:44,866 INFO L82 PathProgramCache]: Analyzing trace with hash -1411161737, now seen corresponding path program 1 times [2020-12-22 10:05:44,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:05:44,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279344596] [2020-12-22 10:05:44,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:05:44,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:05:45,034 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-12-22 10:05:45,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279344596] [2020-12-22 10:05:45,034 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:05:45,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:05:45,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084092005] [2020-12-22 10:05:45,035 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:05:45,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:05:45,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:05:45,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:05:45,037 INFO L87 Difference]: Start difference. First operand 10210 states and 15026 transitions. Second operand 8 states. [2020-12-22 10:05:48,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:05:48,246 INFO L93 Difference]: Finished difference Result 59216 states and 85737 transitions. [2020-12-22 10:05:48,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:05:48,247 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 112 [2020-12-22 10:05:48,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:05:48,522 INFO L225 Difference]: With dead ends: 59216 [2020-12-22 10:05:48,522 INFO L226 Difference]: Without dead ends: 51310 [2020-12-22 10:05:48,548 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:05:48,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51310 states. [2020-12-22 10:05:50,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51310 to 18114. [2020-12-22 10:05:50,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18114 states. [2020-12-22 10:05:50,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18114 states to 18114 states and 26354 transitions. [2020-12-22 10:05:50,242 INFO L78 Accepts]: Start accepts. Automaton has 18114 states and 26354 transitions. Word has length 112 [2020-12-22 10:05:50,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:05:50,243 INFO L481 AbstractCegarLoop]: Abstraction has 18114 states and 26354 transitions. [2020-12-22 10:05:50,243 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:05:50,243 INFO L276 IsEmpty]: Start isEmpty. Operand 18114 states and 26354 transitions. [2020-12-22 10:05:50,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 10:05:50,251 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:05:50,252 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 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] [2020-12-22 10:05:50,252 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 10:05:50,252 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:05:50,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:05:50,253 INFO L82 PathProgramCache]: Analyzing trace with hash -1381639519, now seen corresponding path program 1 times [2020-12-22 10:05:50,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:05:50,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204521812] [2020-12-22 10:05:50,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:05:50,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:05:50,397 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-22 10:05:50,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204521812] [2020-12-22 10:05:50,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:05:50,398 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:05:50,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526595156] [2020-12-22 10:05:50,399 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:05:50,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:05:50,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:05:50,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:05:50,400 INFO L87 Difference]: Start difference. First operand 18114 states and 26354 transitions. Second operand 8 states. [2020-12-22 10:05:53,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:05:53,660 INFO L93 Difference]: Finished difference Result 67120 states and 97065 transitions. [2020-12-22 10:05:53,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:05:53,660 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 112 [2020-12-22 10:05:53,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:05:53,795 INFO L225 Difference]: With dead ends: 67120 [2020-12-22 10:05:53,795 INFO L226 Difference]: Without dead ends: 59214 [2020-12-22 10:05:53,826 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:05:53,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59214 states. [2020-12-22 10:05:56,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59214 to 29986. [2020-12-22 10:05:56,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29986 states. [2020-12-22 10:05:56,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29986 states to 29986 states and 43266 transitions. [2020-12-22 10:05:56,338 INFO L78 Accepts]: Start accepts. Automaton has 29986 states and 43266 transitions. Word has length 112 [2020-12-22 10:05:56,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:05:56,339 INFO L481 AbstractCegarLoop]: Abstraction has 29986 states and 43266 transitions. [2020-12-22 10:05:56,339 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:05:56,339 INFO L276 IsEmpty]: Start isEmpty. Operand 29986 states and 43266 transitions. [2020-12-22 10:05:56,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 10:05:56,349 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:05:56,349 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 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] [2020-12-22 10:05:56,349 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 10:05:56,349 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:05:56,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:05:56,350 INFO L82 PathProgramCache]: Analyzing trace with hash -1107951807, now seen corresponding path program 1 times [2020-12-22 10:05:56,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:05:56,350 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001457161] [2020-12-22 10:05:56,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:05:56,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:05:56,491 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-22 10:05:56,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001457161] [2020-12-22 10:05:56,492 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:05:56,492 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:05:56,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687336321] [2020-12-22 10:05:56,493 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:05:56,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:05:56,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:05:56,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:05:56,494 INFO L87 Difference]: Start difference. First operand 29986 states and 43266 transitions. Second operand 8 states. [2020-12-22 10:06:00,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:06:00,393 INFO L93 Difference]: Finished difference Result 75024 states and 108393 transitions. [2020-12-22 10:06:00,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:06:00,394 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 112 [2020-12-22 10:06:00,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:06:00,528 INFO L225 Difference]: With dead ends: 75024 [2020-12-22 10:06:00,528 INFO L226 Difference]: Without dead ends: 67118 [2020-12-22 10:06:00,557 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:06:00,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67118 states. [2020-12-22 10:06:03,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67118 to 37890. [2020-12-22 10:06:03,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37890 states. [2020-12-22 10:06:03,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37890 states to 37890 states and 54594 transitions. [2020-12-22 10:06:03,489 INFO L78 Accepts]: Start accepts. Automaton has 37890 states and 54594 transitions. Word has length 112 [2020-12-22 10:06:03,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:06:03,490 INFO L481 AbstractCegarLoop]: Abstraction has 37890 states and 54594 transitions. [2020-12-22 10:06:03,490 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:06:03,490 INFO L276 IsEmpty]: Start isEmpty. Operand 37890 states and 54594 transitions. [2020-12-22 10:06:03,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 10:06:03,502 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:06:03,502 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 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] [2020-12-22 10:06:03,503 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 10:06:03,503 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:06:03,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:06:03,503 INFO L82 PathProgramCache]: Analyzing trace with hash 711119841, now seen corresponding path program 1 times [2020-12-22 10:06:03,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:06:03,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760284998] [2020-12-22 10:06:03,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:06:03,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:06:03,687 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 10:06:03,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760284998] [2020-12-22 10:06:03,688 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:06:03,688 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:06:03,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409095983] [2020-12-22 10:06:03,689 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:06:03,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:06:03,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:06:03,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:06:03,691 INFO L87 Difference]: Start difference. First operand 37890 states and 54594 transitions. Second operand 8 states. [2020-12-22 10:06:08,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:06:08,361 INFO L93 Difference]: Finished difference Result 82928 states and 119721 transitions. [2020-12-22 10:06:08,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:06:08,362 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 112 [2020-12-22 10:06:08,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:06:08,467 INFO L225 Difference]: With dead ends: 82928 [2020-12-22 10:06:08,468 INFO L226 Difference]: Without dead ends: 75022 [2020-12-22 10:06:08,493 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:06:08,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75022 states. [2020-12-22 10:06:12,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75022 to 45794. [2020-12-22 10:06:12,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45794 states. [2020-12-22 10:06:12,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45794 states to 45794 states and 65922 transitions. [2020-12-22 10:06:12,219 INFO L78 Accepts]: Start accepts. Automaton has 45794 states and 65922 transitions. Word has length 112 [2020-12-22 10:06:12,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:06:12,219 INFO L481 AbstractCegarLoop]: Abstraction has 45794 states and 65922 transitions. [2020-12-22 10:06:12,220 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:06:12,220 INFO L276 IsEmpty]: Start isEmpty. Operand 45794 states and 65922 transitions. [2020-12-22 10:06:12,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 10:06:12,235 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:06:12,235 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 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] [2020-12-22 10:06:12,235 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 10:06:12,235 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:06:12,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:06:12,236 INFO L82 PathProgramCache]: Analyzing trace with hash 890525825, now seen corresponding path program 1 times [2020-12-22 10:06:12,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:06:12,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348996573] [2020-12-22 10:06:12,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:06:12,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:06:12,547 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 10:06:12,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348996573] [2020-12-22 10:06:12,551 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:06:12,551 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:06:12,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72340796] [2020-12-22 10:06:12,553 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:06:12,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:06:12,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:06:12,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:06:12,554 INFO L87 Difference]: Start difference. First operand 45794 states and 65922 transitions. Second operand 8 states. [2020-12-22 10:06:18,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:06:18,351 INFO L93 Difference]: Finished difference Result 90832 states and 131049 transitions. [2020-12-22 10:06:18,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:06:18,351 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 112 [2020-12-22 10:06:18,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:06:18,447 INFO L225 Difference]: With dead ends: 90832 [2020-12-22 10:06:18,447 INFO L226 Difference]: Without dead ends: 82926 [2020-12-22 10:06:18,476 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:06:18,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82926 states. [2020-12-22 10:06:22,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82926 to 53698. [2020-12-22 10:06:22,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53698 states. [2020-12-22 10:06:22,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53698 states to 53698 states and 77250 transitions. [2020-12-22 10:06:22,691 INFO L78 Accepts]: Start accepts. Automaton has 53698 states and 77250 transitions. Word has length 112 [2020-12-22 10:06:22,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:06:22,692 INFO L481 AbstractCegarLoop]: Abstraction has 53698 states and 77250 transitions. [2020-12-22 10:06:22,692 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:06:22,692 INFO L276 IsEmpty]: Start isEmpty. Operand 53698 states and 77250 transitions. [2020-12-22 10:06:22,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 10:06:22,704 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:06:22,704 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 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] [2020-12-22 10:06:22,705 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 10:06:22,705 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:06:22,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:06:22,705 INFO L82 PathProgramCache]: Analyzing trace with hash -420877289, now seen corresponding path program 1 times [2020-12-22 10:06:22,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:06:22,706 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788830765] [2020-12-22 10:06:22,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:06:22,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:06:22,846 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 10:06:22,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788830765] [2020-12-22 10:06:22,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:06:22,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:06:22,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947372577] [2020-12-22 10:06:22,849 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:06:22,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:06:22,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:06:22,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:06:22,850 INFO L87 Difference]: Start difference. First operand 53698 states and 77250 transitions. Second operand 8 states. [2020-12-22 10:06:29,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:06:29,708 INFO L93 Difference]: Finished difference Result 93936 states and 135529 transitions. [2020-12-22 10:06:29,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:06:29,709 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 112 [2020-12-22 10:06:29,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:06:29,795 INFO L225 Difference]: With dead ends: 93936 [2020-12-22 10:06:29,795 INFO L226 Difference]: Without dead ends: 88430 [2020-12-22 10:06:29,814 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:06:29,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88430 states. [2020-12-22 10:06:34,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88430 to 59202. [2020-12-22 10:06:34,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59202 states. [2020-12-22 10:06:34,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59202 states to 59202 states and 85186 transitions. [2020-12-22 10:06:34,628 INFO L78 Accepts]: Start accepts. Automaton has 59202 states and 85186 transitions. Word has length 112 [2020-12-22 10:06:34,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:06:34,628 INFO L481 AbstractCegarLoop]: Abstraction has 59202 states and 85186 transitions. [2020-12-22 10:06:34,628 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:06:34,628 INFO L276 IsEmpty]: Start isEmpty. Operand 59202 states and 85186 transitions. [2020-12-22 10:06:34,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-12-22 10:06:34,648 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:06:34,648 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 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] [2020-12-22 10:06:34,648 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 10:06:34,648 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:06:34,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:06:34,649 INFO L82 PathProgramCache]: Analyzing trace with hash 746098925, now seen corresponding path program 1 times [2020-12-22 10:06:34,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:06:34,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172680113] [2020-12-22 10:06:34,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:06:34,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:06:34,726 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:06:34,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172680113] [2020-12-22 10:06:34,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:06:34,727 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:06:34,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964640881] [2020-12-22 10:06:34,727 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:06:34,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:06:34,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:06:34,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:06:34,728 INFO L87 Difference]: Start difference. First operand 59202 states and 85186 transitions. Second operand 3 states. [2020-12-22 10:06:39,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:06:39,544 INFO L93 Difference]: Finished difference Result 116102 states and 166772 transitions. [2020-12-22 10:06:39,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:06:39,545 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 113 [2020-12-22 10:06:39,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:06:39,635 INFO L225 Difference]: With dead ends: 116102 [2020-12-22 10:06:39,635 INFO L226 Difference]: Without dead ends: 59204 [2020-12-22 10:06:39,675 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 10:06:39,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59204 states. [2020-12-22 10:06:44,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59204 to 59202. [2020-12-22 10:06:44,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59202 states. [2020-12-22 10:06:44,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59202 states to 59202 states and 84498 transitions. [2020-12-22 10:06:44,203 INFO L78 Accepts]: Start accepts. Automaton has 59202 states and 84498 transitions. Word has length 113 [2020-12-22 10:06:44,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:06:44,203 INFO L481 AbstractCegarLoop]: Abstraction has 59202 states and 84498 transitions. [2020-12-22 10:06:44,203 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:06:44,204 INFO L276 IsEmpty]: Start isEmpty. Operand 59202 states and 84498 transitions. [2020-12-22 10:06:44,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-12-22 10:06:44,210 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:06:44,210 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 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] [2020-12-22 10:06:44,210 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 10:06:44,210 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:06:44,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:06:44,211 INFO L82 PathProgramCache]: Analyzing trace with hash -1169646557, now seen corresponding path program 1 times [2020-12-22 10:06:44,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:06:44,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897918774] [2020-12-22 10:06:44,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:06:44,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:06:44,295 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:06:44,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897918774] [2020-12-22 10:06:44,295 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:06:44,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:06:44,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591344852] [2020-12-22 10:06:44,296 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:06:44,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:06:44,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:06:44,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:06:44,297 INFO L87 Difference]: Start difference. First operand 59202 states and 84498 transitions. Second operand 3 states. [2020-12-22 10:06:46,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:06:46,895 INFO L93 Difference]: Finished difference Result 87654 states and 124948 transitions. [2020-12-22 10:06:46,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:06:46,896 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 113 [2020-12-22 10:06:46,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:06:46,929 INFO L225 Difference]: With dead ends: 87654 [2020-12-22 10:06:46,929 INFO L226 Difference]: Without dead ends: 30756 [2020-12-22 10:06:46,960 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 10:06:46,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30756 states. [2020-12-22 10:06:49,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30756 to 30754. [2020-12-22 10:06:49,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30754 states. [2020-12-22 10:06:49,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30754 states to 30754 states and 43706 transitions. [2020-12-22 10:06:49,493 INFO L78 Accepts]: Start accepts. Automaton has 30754 states and 43706 transitions. Word has length 113 [2020-12-22 10:06:49,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:06:49,493 INFO L481 AbstractCegarLoop]: Abstraction has 30754 states and 43706 transitions. [2020-12-22 10:06:49,493 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:06:49,493 INFO L276 IsEmpty]: Start isEmpty. Operand 30754 states and 43706 transitions. [2020-12-22 10:06:49,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-12-22 10:06:49,499 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:06:49,500 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] [2020-12-22 10:06:49,500 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 10:06:49,500 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:06:49,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:06:49,500 INFO L82 PathProgramCache]: Analyzing trace with hash 1209709145, now seen corresponding path program 1 times [2020-12-22 10:06:49,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:06:49,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217727600] [2020-12-22 10:06:49,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:06:49,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:06:49,641 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:06:49,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217727600] [2020-12-22 10:06:49,641 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:06:49,641 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:06:49,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186282490] [2020-12-22 10:06:49,642 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:06:49,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:06:49,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:06:49,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:06:49,643 INFO L87 Difference]: Start difference. First operand 30754 states and 43706 transitions. Second operand 3 states. [2020-12-22 10:06:50,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:06:50,870 INFO L93 Difference]: Finished difference Result 44982 states and 63760 transitions. [2020-12-22 10:06:50,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:06:50,872 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 113 [2020-12-22 10:06:50,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:06:50,891 INFO L225 Difference]: With dead ends: 44982 [2020-12-22 10:06:50,892 INFO L226 Difference]: Without dead ends: 16532 [2020-12-22 10:06:50,902 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 10:06:50,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16532 states. [2020-12-22 10:06:52,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16532 to 16530. [2020-12-22 10:06:52,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16530 states. [2020-12-22 10:06:52,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16530 states to 16530 states and 23482 transitions. [2020-12-22 10:06:52,199 INFO L78 Accepts]: Start accepts. Automaton has 16530 states and 23482 transitions. Word has length 113 [2020-12-22 10:06:52,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:06:52,200 INFO L481 AbstractCegarLoop]: Abstraction has 16530 states and 23482 transitions. [2020-12-22 10:06:52,200 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:06:52,200 INFO L276 IsEmpty]: Start isEmpty. Operand 16530 states and 23482 transitions. [2020-12-22 10:06:52,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-12-22 10:06:52,202 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:06:52,202 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] [2020-12-22 10:06:52,203 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 10:06:52,203 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:06:52,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:06:52,203 INFO L82 PathProgramCache]: Analyzing trace with hash -1498655857, now seen corresponding path program 1 times [2020-12-22 10:06:52,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:06:52,204 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954023191] [2020-12-22 10:06:52,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:06:52,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:06:52,313 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:06:52,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954023191] [2020-12-22 10:06:52,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:06:52,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:06:52,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472465690] [2020-12-22 10:06:52,317 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:06:52,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:06:52,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:06:52,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:06:52,319 INFO L87 Difference]: Start difference. First operand 16530 states and 23482 transitions. Second operand 3 states. [2020-12-22 10:06:52,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:06:52,871 INFO L93 Difference]: Finished difference Result 23646 states and 33424 transitions. [2020-12-22 10:06:52,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:06:52,871 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 113 [2020-12-22 10:06:52,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:06:52,881 INFO L225 Difference]: With dead ends: 23646 [2020-12-22 10:06:52,881 INFO L226 Difference]: Without dead ends: 9420 [2020-12-22 10:06:52,890 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 10:06:52,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9420 states. [2020-12-22 10:06:53,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9420 to 9418. [2020-12-22 10:06:53,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9418 states. [2020-12-22 10:06:53,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9418 states to 9418 states and 13456 transitions. [2020-12-22 10:06:53,527 INFO L78 Accepts]: Start accepts. Automaton has 9418 states and 13456 transitions. Word has length 113 [2020-12-22 10:06:53,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:06:53,528 INFO L481 AbstractCegarLoop]: Abstraction has 9418 states and 13456 transitions. [2020-12-22 10:06:53,528 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:06:53,528 INFO L276 IsEmpty]: Start isEmpty. Operand 9418 states and 13456 transitions. [2020-12-22 10:06:53,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-12-22 10:06:53,529 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:06:53,529 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:06:53,530 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 10:06:53,530 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:06:53,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:06:53,530 INFO L82 PathProgramCache]: Analyzing trace with hash -1585774651, now seen corresponding path program 1 times [2020-12-22 10:06:53,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:06:53,531 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651406449] [2020-12-22 10:06:53,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:06:53,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:06:53,888 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:06:53,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651406449] [2020-12-22 10:06:53,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875262549] [2020-12-22 10:06:53,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:06:54,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:06:54,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-22 10:06:54,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:06:54,462 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 10:06:54,462 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:06:54,462 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 21 [2020-12-22 10:06:54,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031007424] [2020-12-22 10:06:54,463 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 10:06:54,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:06:54,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 10:06:54,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2020-12-22 10:06:54,464 INFO L87 Difference]: Start difference. First operand 9418 states and 13456 transitions. Second operand 21 states. [2020-12-22 10:06:54,981 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 42 [2020-12-22 10:06:58,737 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2020-12-22 10:07:03,299 WARN L197 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 41 [2020-12-22 10:07:03,529 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2020-12-22 10:07:04,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:07:04,920 INFO L93 Difference]: Finished difference Result 57297 states and 78761 transitions. [2020-12-22 10:07:04,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2020-12-22 10:07:04,921 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 113 [2020-12-22 10:07:04,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:07:05,062 INFO L225 Difference]: With dead ends: 57297 [2020-12-22 10:07:05,062 INFO L226 Difference]: Without dead ends: 50183 [2020-12-22 10:07:05,078 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3479 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1672, Invalid=8228, Unknown=0, NotChecked=0, Total=9900 [2020-12-22 10:07:05,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50183 states. [2020-12-22 10:07:08,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50183 to 32438. [2020-12-22 10:07:08,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32438 states. [2020-12-22 10:07:08,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32438 states to 32438 states and 44624 transitions. [2020-12-22 10:07:08,819 INFO L78 Accepts]: Start accepts. Automaton has 32438 states and 44624 transitions. Word has length 113 [2020-12-22 10:07:08,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:07:08,820 INFO L481 AbstractCegarLoop]: Abstraction has 32438 states and 44624 transitions. [2020-12-22 10:07:08,820 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 10:07:08,820 INFO L276 IsEmpty]: Start isEmpty. Operand 32438 states and 44624 transitions. [2020-12-22 10:07:08,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-12-22 10:07:08,825 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:07:08,826 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:07:09,040 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-22 10:07:09,041 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:07:09,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:07:09,042 INFO L82 PathProgramCache]: Analyzing trace with hash -409173495, now seen corresponding path program 1 times [2020-12-22 10:07:09,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:07:09,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311755078] [2020-12-22 10:07:09,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:07:09,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:07:09,338 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:07:09,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311755078] [2020-12-22 10:07:09,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229876114] [2020-12-22 10:07:09,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:07:09,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:07:09,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 10:07:09,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:07:09,736 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 10:07:10,063 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:07:10,064 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:07:10,064 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-12-22 10:07:10,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38151864] [2020-12-22 10:07:10,065 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 10:07:10,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:07:10,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 10:07:10,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2020-12-22 10:07:10,066 INFO L87 Difference]: Start difference. First operand 32438 states and 44624 transitions. Second operand 18 states. [2020-12-22 10:07:10,200 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 10:07:12,507 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 10:07:13,272 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-12-22 10:07:15,373 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2020-12-22 10:07:15,513 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 10:07:16,126 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-12-22 10:07:16,259 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 10:07:18,409 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 10:07:20,776 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 10:07:21,154 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 10:07:21,325 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 10:07:22,199 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2020-12-22 10:07:22,626 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-12-22 10:07:23,484 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-12-22 10:07:27,564 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-12-22 10:07:27,701 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 10:07:27,892 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2020-12-22 10:07:29,459 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2020-12-22 10:08:01,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:08:01,153 INFO L93 Difference]: Finished difference Result 391208 states and 528208 transitions. [2020-12-22 10:08:01,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2020-12-22 10:08:01,154 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 114 [2020-12-22 10:08:01,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:08:01,991 INFO L225 Difference]: With dead ends: 391208 [2020-12-22 10:08:01,991 INFO L226 Difference]: Without dead ends: 361074 [2020-12-22 10:08:02,075 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6383 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=2552, Invalid=14478, Unknown=0, NotChecked=0, Total=17030 [2020-12-22 10:08:02,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361074 states. [2020-12-22 10:08:19,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361074 to 138715. [2020-12-22 10:08:19,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138715 states. [2020-12-22 10:08:20,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138715 states to 138715 states and 186150 transitions. [2020-12-22 10:08:20,054 INFO L78 Accepts]: Start accepts. Automaton has 138715 states and 186150 transitions. Word has length 114 [2020-12-22 10:08:20,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:08:20,054 INFO L481 AbstractCegarLoop]: Abstraction has 138715 states and 186150 transitions. [2020-12-22 10:08:20,054 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 10:08:20,055 INFO L276 IsEmpty]: Start isEmpty. Operand 138715 states and 186150 transitions. [2020-12-22 10:08:20,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-12-22 10:08:20,090 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:08:20,091 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 10:08:20,303 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-22 10:08:20,305 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:08:20,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:08:20,306 INFO L82 PathProgramCache]: Analyzing trace with hash 1061210015, now seen corresponding path program 1 times [2020-12-22 10:08:20,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:08:20,307 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034998774] [2020-12-22 10:08:20,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:08:20,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:08:20,377 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:08:20,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034998774] [2020-12-22 10:08:20,377 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:08:20,377 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:08:20,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016297732] [2020-12-22 10:08:20,378 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:08:20,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:08:20,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:08:20,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:08:20,379 INFO L87 Difference]: Start difference. First operand 138715 states and 186150 transitions. Second operand 3 states. [2020-12-22 10:08:26,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:08:26,765 INFO L93 Difference]: Finished difference Result 190807 states and 255285 transitions. [2020-12-22 10:08:26,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:08:26,766 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 114 [2020-12-22 10:08:26,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:08:27,024 INFO L225 Difference]: With dead ends: 190807 [2020-12-22 10:08:27,024 INFO L226 Difference]: Without dead ends: 54396 [2020-12-22 10:08:27,100 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 10:08:27,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54396 states. [2020-12-22 10:08:32,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54396 to 50920. [2020-12-22 10:08:32,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50920 states. [2020-12-22 10:08:32,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50920 states to 50920 states and 67732 transitions. [2020-12-22 10:08:32,887 INFO L78 Accepts]: Start accepts. Automaton has 50920 states and 67732 transitions. Word has length 114 [2020-12-22 10:08:32,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:08:32,888 INFO L481 AbstractCegarLoop]: Abstraction has 50920 states and 67732 transitions. [2020-12-22 10:08:32,888 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:08:32,888 INFO L276 IsEmpty]: Start isEmpty. Operand 50920 states and 67732 transitions. [2020-12-22 10:08:32,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-12-22 10:08:32,890 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:08:32,891 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:08:32,891 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-12-22 10:08:32,891 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:08:32,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:08:32,891 INFO L82 PathProgramCache]: Analyzing trace with hash 707187499, now seen corresponding path program 1 times [2020-12-22 10:08:32,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:08:32,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724945246] [2020-12-22 10:08:32,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:08:32,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:08:32,995 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 10:08:32,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724945246] [2020-12-22 10:08:32,996 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:08:32,996 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:08:32,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259905508] [2020-12-22 10:08:32,997 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 10:08:32,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:08:32,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 10:08:32,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 10:08:32,998 INFO L87 Difference]: Start difference. First operand 50920 states and 67732 transitions. Second operand 6 states. [2020-12-22 10:08:38,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:08:38,563 INFO L93 Difference]: Finished difference Result 96391 states and 127956 transitions. [2020-12-22 10:08:38,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 10:08:38,564 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 114 [2020-12-22 10:08:38,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:08:38,618 INFO L225 Difference]: With dead ends: 96391 [2020-12-22 10:08:38,618 INFO L226 Difference]: Without dead ends: 47892 [2020-12-22 10:08:38,644 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 10:08:38,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47892 states.