/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.3.4.ufo.BOUNDED-6.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 07:39:54,756 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 07:39:54,760 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 07:39:54,799 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 07:39:54,799 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 07:39:54,801 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 07:39:54,803 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 07:39:54,805 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 07:39:54,808 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 07:39:54,809 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 07:39:54,810 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 07:39:54,812 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 07:39:54,812 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 07:39:54,813 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 07:39:54,815 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 07:39:54,816 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 07:39:54,817 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 07:39:54,819 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 07:39:54,821 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 07:39:54,823 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 07:39:54,825 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 07:39:54,827 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 07:39:54,828 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 07:39:54,829 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 07:39:54,832 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-22 07:39:54,833 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-22 07:39:54,833 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-22 07:39:54,834 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-22 07:39:54,835 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-22 07:39:54,836 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-22 07:39:54,837 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 07:39:54,838 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 07:39:54,839 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 07:39:54,840 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 07:39:54,854 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 07:39:54,857 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 07:39:54,859 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 07:39:54,860 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 07:39:54,860 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 07:39:54,861 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 07:39:54,862 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 07:39:54,863 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 07:39:54,893 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 07:39:54,893 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 07:39:54,895 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 07:39:54,895 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 07:39:54,895 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 07:39:54,895 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 07:39:54,896 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 07:39:54,896 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 07:39:54,896 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 07:39:54,896 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 07:39:54,896 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 07:39:54,897 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 07:39:54,897 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 07:39:54,897 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 07:39:54,897 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 07:39:54,898 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 07:39:54,898 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 07:39:54,898 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 07:39:54,898 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 07:39:54,898 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 07:39:54,899 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 07:39:54,899 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 07:39:54,899 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 07:39:54,899 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 07:39:54,899 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 07:39:54,899 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 07:39:55,332 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 07:39:55,366 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 07:39:55,369 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 07:39:55,371 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 07:39:55,371 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 07:39:55,372 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.3.4.ufo.BOUNDED-6.pals.c [2020-12-22 07:39:55,466 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4c4a4a278/fd45ed3f5e1f4321a3058926c058808f/FLAGfa7ef3ae1 [2020-12-22 07:39:56,243 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 07:39:56,243 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.3.4.ufo.BOUNDED-6.pals.c [2020-12-22 07:39:56,262 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4c4a4a278/fd45ed3f5e1f4321a3058926c058808f/FLAGfa7ef3ae1 [2020-12-22 07:39:56,537 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4c4a4a278/fd45ed3f5e1f4321a3058926c058808f [2020-12-22 07:39:56,541 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 07:39:56,543 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 07:39:56,549 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 07:39:56,549 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 07:39:56,553 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 07:39:56,554 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:39:56" (1/1) ... [2020-12-22 07:39:56,556 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f8584f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:39:56, skipping insertion in model container [2020-12-22 07:39:56,556 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:39:56" (1/1) ... [2020-12-22 07:39:56,564 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 07:39:56,630 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 07:39:56,908 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.3.4.ufo.BOUNDED-6.pals.c[14373,14386] [2020-12-22 07:39:56,913 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:39:56,932 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 07:39:57,028 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.3.4.ufo.BOUNDED-6.pals.c[14373,14386] [2020-12-22 07:39:57,029 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:39:57,052 INFO L208 MainTranslator]: Completed translation [2020-12-22 07:39:57,053 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:39:57 WrapperNode [2020-12-22 07:39:57,053 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 07:39:57,054 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 07:39:57,055 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 07:39:57,055 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 07:39:57,067 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:39:57" (1/1) ... [2020-12-22 07:39:57,081 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:39:57" (1/1) ... [2020-12-22 07:39:57,155 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 07:39:57,159 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 07:39:57,159 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 07:39:57,160 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 07:39:57,174 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:39:57" (1/1) ... [2020-12-22 07:39:57,174 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:39:57" (1/1) ... [2020-12-22 07:39:57,195 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:39:57" (1/1) ... [2020-12-22 07:39:57,197 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:39:57" (1/1) ... [2020-12-22 07:39:57,223 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:39:57" (1/1) ... [2020-12-22 07:39:57,244 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:39:57" (1/1) ... [2020-12-22 07:39:57,249 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:39:57" (1/1) ... [2020-12-22 07:39:57,261 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 07:39:57,265 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 07:39:57,265 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 07:39:57,266 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 07:39:57,267 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:39:57" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 07:39:57,380 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 07:39:57,380 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 07:39:57,380 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 07:39:57,381 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 07:39:58,456 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 07:39:58,456 INFO L299 CfgBuilder]: Removed 19 assume(true) statements. [2020-12-22 07:39:58,458 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:39:58 BoogieIcfgContainer [2020-12-22 07:39:58,458 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 07:39:58,460 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 07:39:58,460 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 07:39:58,465 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 07:39:58,465 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 07:39:56" (1/3) ... [2020-12-22 07:39:58,466 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61bdd99b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:39:58, skipping insertion in model container [2020-12-22 07:39:58,466 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:39:57" (2/3) ... [2020-12-22 07:39:58,466 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61bdd99b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:39:58, skipping insertion in model container [2020-12-22 07:39:58,467 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:39:58" (3/3) ... [2020-12-22 07:39:58,468 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.4.ufo.BOUNDED-6.pals.c [2020-12-22 07:39:58,477 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 07:39:58,483 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 07:39:58,503 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 07:39:58,540 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 07:39:58,540 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 07:39:58,541 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 07:39:58,541 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 07:39:58,541 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 07:39:58,541 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 07:39:58,541 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 07:39:58,542 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 07:39:58,561 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states. [2020-12-22 07:39:58,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-22 07:39:58,571 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:39:58,571 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:39:58,572 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:39:58,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:39:58,578 INFO L82 PathProgramCache]: Analyzing trace with hash -1418405445, now seen corresponding path program 1 times [2020-12-22 07:39:58,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:39:58,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586550311] [2020-12-22 07:39:58,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:39:58,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:39:58,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:39:58,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586550311] [2020-12-22 07:39:58,943 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:39:58,943 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:39:58,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939711121] [2020-12-22 07:39:58,950 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 07:39:58,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:39:58,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 07:39:58,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 07:39:58,971 INFO L87 Difference]: Start difference. First operand 143 states. Second operand 2 states. [2020-12-22 07:39:59,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:39:59,008 INFO L93 Difference]: Finished difference Result 227 states and 388 transitions. [2020-12-22 07:39:59,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 07:39:59,010 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 37 [2020-12-22 07:39:59,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:39:59,023 INFO L225 Difference]: With dead ends: 227 [2020-12-22 07:39:59,024 INFO L226 Difference]: Without dead ends: 139 [2020-12-22 07:39:59,027 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 07:39:59,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-12-22 07:39:59,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2020-12-22 07:39:59,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-12-22 07:39:59,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 241 transitions. [2020-12-22 07:39:59,081 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 241 transitions. Word has length 37 [2020-12-22 07:39:59,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:39:59,081 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 241 transitions. [2020-12-22 07:39:59,081 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 07:39:59,082 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 241 transitions. [2020-12-22 07:39:59,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-22 07:39:59,084 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:39:59,084 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:39:59,085 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 07:39:59,085 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:39:59,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:39:59,086 INFO L82 PathProgramCache]: Analyzing trace with hash 2058913401, now seen corresponding path program 1 times [2020-12-22 07:39:59,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:39:59,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797285242] [2020-12-22 07:39:59,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:39:59,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:39:59,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:39:59,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797285242] [2020-12-22 07:39:59,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:39:59,226 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:39:59,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013184679] [2020-12-22 07:39:59,228 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:39:59,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:39:59,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:39:59,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:39:59,230 INFO L87 Difference]: Start difference. First operand 139 states and 241 transitions. Second operand 5 states. [2020-12-22 07:39:59,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:39:59,464 INFO L93 Difference]: Finished difference Result 222 states and 378 transitions. [2020-12-22 07:39:59,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 07:39:59,465 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 37 [2020-12-22 07:39:59,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:39:59,467 INFO L225 Difference]: With dead ends: 222 [2020-12-22 07:39:59,467 INFO L226 Difference]: Without dead ends: 139 [2020-12-22 07:39:59,469 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:39:59,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-12-22 07:39:59,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2020-12-22 07:39:59,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-12-22 07:39:59,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 211 transitions. [2020-12-22 07:39:59,482 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 211 transitions. Word has length 37 [2020-12-22 07:39:59,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:39:59,482 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 211 transitions. [2020-12-22 07:39:59,482 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:39:59,483 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 211 transitions. [2020-12-22 07:39:59,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 07:39:59,485 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:39:59,485 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:39:59,486 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 07:39:59,486 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:39:59,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:39:59,487 INFO L82 PathProgramCache]: Analyzing trace with hash -415118785, now seen corresponding path program 1 times [2020-12-22 07:39:59,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:39:59,487 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758967739] [2020-12-22 07:39:59,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:39:59,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:39:59,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:39:59,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758967739] [2020-12-22 07:39:59,690 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:39:59,690 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:39:59,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189004399] [2020-12-22 07:39:59,691 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:39:59,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:39:59,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:39:59,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:39:59,693 INFO L87 Difference]: Start difference. First operand 139 states and 211 transitions. Second operand 3 states. [2020-12-22 07:39:59,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:39:59,769 INFO L93 Difference]: Finished difference Result 279 states and 445 transitions. [2020-12-22 07:39:59,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:39:59,770 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 66 [2020-12-22 07:39:59,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:39:59,773 INFO L225 Difference]: With dead ends: 279 [2020-12-22 07:39:59,773 INFO L226 Difference]: Without dead ends: 200 [2020-12-22 07:39:59,774 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:39:59,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-12-22 07:39:59,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 198. [2020-12-22 07:39:59,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-12-22 07:39:59,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 306 transitions. [2020-12-22 07:39:59,790 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 306 transitions. Word has length 66 [2020-12-22 07:39:59,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:39:59,791 INFO L481 AbstractCegarLoop]: Abstraction has 198 states and 306 transitions. [2020-12-22 07:39:59,791 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:39:59,791 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 306 transitions. [2020-12-22 07:39:59,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 07:39:59,794 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:39:59,795 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:39:59,795 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 07:39:59,795 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:39:59,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:39:59,796 INFO L82 PathProgramCache]: Analyzing trace with hash 928134868, now seen corresponding path program 1 times [2020-12-22 07:39:59,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:39:59,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085503887] [2020-12-22 07:39:59,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:39:59,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:39:59,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:39:59,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085503887] [2020-12-22 07:39:59,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:39:59,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:39:59,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326315635] [2020-12-22 07:39:59,889 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:39:59,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:39:59,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:39:59,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:39:59,891 INFO L87 Difference]: Start difference. First operand 198 states and 306 transitions. Second operand 3 states. [2020-12-22 07:39:59,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:39:59,926 INFO L93 Difference]: Finished difference Result 458 states and 734 transitions. [2020-12-22 07:39:59,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:39:59,927 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 68 [2020-12-22 07:39:59,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:39:59,929 INFO L225 Difference]: With dead ends: 458 [2020-12-22 07:39:59,929 INFO L226 Difference]: Without dead ends: 320 [2020-12-22 07:39:59,931 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:39:59,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2020-12-22 07:39:59,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 318. [2020-12-22 07:39:59,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 318 states. [2020-12-22 07:39:59,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 503 transitions. [2020-12-22 07:39:59,950 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 503 transitions. Word has length 68 [2020-12-22 07:39:59,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:39:59,951 INFO L481 AbstractCegarLoop]: Abstraction has 318 states and 503 transitions. [2020-12-22 07:39:59,951 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:39:59,951 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 503 transitions. [2020-12-22 07:39:59,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-22 07:39:59,959 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:39:59,959 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:39:59,959 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 07:39:59,959 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:39:59,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:39:59,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1295175881, now seen corresponding path program 1 times [2020-12-22 07:39:59,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:39:59,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948286674] [2020-12-22 07:39:59,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:40:00,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:40:00,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:40:00,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948286674] [2020-12-22 07:40:00,105 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:40:00,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:40:00,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550369820] [2020-12-22 07:40:00,106 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:40:00,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:40:00,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:40:00,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:40:00,108 INFO L87 Difference]: Start difference. First operand 318 states and 503 transitions. Second operand 3 states. [2020-12-22 07:40:00,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:40:00,151 INFO L93 Difference]: Finished difference Result 802 states and 1297 transitions. [2020-12-22 07:40:00,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:40:00,152 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 70 [2020-12-22 07:40:00,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:40:00,156 INFO L225 Difference]: With dead ends: 802 [2020-12-22 07:40:00,156 INFO L226 Difference]: Without dead ends: 544 [2020-12-22 07:40:00,157 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:40:00,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2020-12-22 07:40:00,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 542. [2020-12-22 07:40:00,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 542 states. [2020-12-22 07:40:00,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 867 transitions. [2020-12-22 07:40:00,181 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 867 transitions. Word has length 70 [2020-12-22 07:40:00,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:40:00,181 INFO L481 AbstractCegarLoop]: Abstraction has 542 states and 867 transitions. [2020-12-22 07:40:00,181 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:40:00,181 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 867 transitions. [2020-12-22 07:40:00,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-22 07:40:00,184 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:40:00,184 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:40:00,184 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 07:40:00,185 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:40:00,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:40:00,185 INFO L82 PathProgramCache]: Analyzing trace with hash -367652834, now seen corresponding path program 1 times [2020-12-22 07:40:00,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:40:00,186 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150427469] [2020-12-22 07:40:00,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:40:00,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:40:00,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:40:00,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150427469] [2020-12-22 07:40:00,391 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:40:00,392 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:40:00,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131279802] [2020-12-22 07:40:00,393 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:40:00,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:40:00,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:40:00,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:40:00,395 INFO L87 Difference]: Start difference. First operand 542 states and 867 transitions. Second operand 5 states. [2020-12-22 07:40:00,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:40:00,736 INFO L93 Difference]: Finished difference Result 2472 states and 4044 transitions. [2020-12-22 07:40:00,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:40:00,736 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 72 [2020-12-22 07:40:00,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:40:00,749 INFO L225 Difference]: With dead ends: 2472 [2020-12-22 07:40:00,749 INFO L226 Difference]: Without dead ends: 1990 [2020-12-22 07:40:00,751 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:40:00,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1990 states. [2020-12-22 07:40:00,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1990 to 1006. [2020-12-22 07:40:00,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1006 states. [2020-12-22 07:40:00,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1006 states to 1006 states and 1623 transitions. [2020-12-22 07:40:00,797 INFO L78 Accepts]: Start accepts. Automaton has 1006 states and 1623 transitions. Word has length 72 [2020-12-22 07:40:00,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:40:00,797 INFO L481 AbstractCegarLoop]: Abstraction has 1006 states and 1623 transitions. [2020-12-22 07:40:00,797 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:40:00,798 INFO L276 IsEmpty]: Start isEmpty. Operand 1006 states and 1623 transitions. [2020-12-22 07:40:00,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-12-22 07:40:00,799 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:40:00,800 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:40:00,800 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 07:40:00,800 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:40:00,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:40:00,801 INFO L82 PathProgramCache]: Analyzing trace with hash -435168554, now seen corresponding path program 1 times [2020-12-22 07:40:00,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:40:00,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820919836] [2020-12-22 07:40:00,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:40:00,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:40:00,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:40:00,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820919836] [2020-12-22 07:40:00,877 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:40:00,877 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:40:00,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186472267] [2020-12-22 07:40:00,878 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:40:00,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:40:00,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:40:00,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:40:00,880 INFO L87 Difference]: Start difference. First operand 1006 states and 1623 transitions. Second operand 4 states. [2020-12-22 07:40:01,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:40:01,088 INFO L93 Difference]: Finished difference Result 3644 states and 5934 transitions. [2020-12-22 07:40:01,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:40:01,089 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 73 [2020-12-22 07:40:01,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:40:01,105 INFO L225 Difference]: With dead ends: 3644 [2020-12-22 07:40:01,106 INFO L226 Difference]: Without dead ends: 2698 [2020-12-22 07:40:01,109 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:40:01,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2698 states. [2020-12-22 07:40:01,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2698 to 1843. [2020-12-22 07:40:01,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1843 states. [2020-12-22 07:40:01,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1843 states to 1843 states and 2977 transitions. [2020-12-22 07:40:01,241 INFO L78 Accepts]: Start accepts. Automaton has 1843 states and 2977 transitions. Word has length 73 [2020-12-22 07:40:01,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:40:01,242 INFO L481 AbstractCegarLoop]: Abstraction has 1843 states and 2977 transitions. [2020-12-22 07:40:01,242 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:40:01,242 INFO L276 IsEmpty]: Start isEmpty. Operand 1843 states and 2977 transitions. [2020-12-22 07:40:01,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-12-22 07:40:01,246 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:40:01,246 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:40:01,247 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 07:40:01,247 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:40:01,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:40:01,248 INFO L82 PathProgramCache]: Analyzing trace with hash 152415701, now seen corresponding path program 1 times [2020-12-22 07:40:01,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:40:01,249 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971579650] [2020-12-22 07:40:01,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:40:01,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:40:01,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:40:01,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971579650] [2020-12-22 07:40:01,331 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:40:01,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:40:01,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002309901] [2020-12-22 07:40:01,332 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:40:01,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:40:01,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:40:01,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:40:01,334 INFO L87 Difference]: Start difference. First operand 1843 states and 2977 transitions. Second operand 3 states. [2020-12-22 07:40:01,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:40:01,427 INFO L93 Difference]: Finished difference Result 3597 states and 5826 transitions. [2020-12-22 07:40:01,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:40:01,429 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 74 [2020-12-22 07:40:01,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:40:01,442 INFO L225 Difference]: With dead ends: 3597 [2020-12-22 07:40:01,443 INFO L226 Difference]: Without dead ends: 2591 [2020-12-22 07:40:01,445 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:40:01,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2591 states. [2020-12-22 07:40:01,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2591 to 2589. [2020-12-22 07:40:01,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2589 states. [2020-12-22 07:40:01,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2589 states to 2589 states and 4156 transitions. [2020-12-22 07:40:01,544 INFO L78 Accepts]: Start accepts. Automaton has 2589 states and 4156 transitions. Word has length 74 [2020-12-22 07:40:01,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:40:01,545 INFO L481 AbstractCegarLoop]: Abstraction has 2589 states and 4156 transitions. [2020-12-22 07:40:01,545 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:40:01,545 INFO L276 IsEmpty]: Start isEmpty. Operand 2589 states and 4156 transitions. [2020-12-22 07:40:01,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-12-22 07:40:01,546 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:40:01,546 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:40:01,547 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 07:40:01,547 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:40:01,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:40:01,547 INFO L82 PathProgramCache]: Analyzing trace with hash 1935815765, now seen corresponding path program 1 times [2020-12-22 07:40:01,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:40:01,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163041392] [2020-12-22 07:40:01,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:40:01,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:40:01,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:40:01,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163041392] [2020-12-22 07:40:01,618 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:40:01,618 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:40:01,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994121214] [2020-12-22 07:40:01,619 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:40:01,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:40:01,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:40:01,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:40:01,620 INFO L87 Difference]: Start difference. First operand 2589 states and 4156 transitions. Second operand 4 states. [2020-12-22 07:40:01,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:40:01,926 INFO L93 Difference]: Finished difference Result 8144 states and 13137 transitions. [2020-12-22 07:40:01,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:40:01,927 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 74 [2020-12-22 07:40:01,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:40:01,956 INFO L225 Difference]: With dead ends: 8144 [2020-12-22 07:40:01,957 INFO L226 Difference]: Without dead ends: 5645 [2020-12-22 07:40:01,961 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:40:01,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5645 states. [2020-12-22 07:40:02,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5645 to 4101. [2020-12-22 07:40:02,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4101 states. [2020-12-22 07:40:02,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4101 states to 4101 states and 6558 transitions. [2020-12-22 07:40:02,164 INFO L78 Accepts]: Start accepts. Automaton has 4101 states and 6558 transitions. Word has length 74 [2020-12-22 07:40:02,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:40:02,164 INFO L481 AbstractCegarLoop]: Abstraction has 4101 states and 6558 transitions. [2020-12-22 07:40:02,165 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:40:02,165 INFO L276 IsEmpty]: Start isEmpty. Operand 4101 states and 6558 transitions. [2020-12-22 07:40:02,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-12-22 07:40:02,166 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:40:02,166 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:40:02,167 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 07:40:02,167 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:40:02,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:40:02,167 INFO L82 PathProgramCache]: Analyzing trace with hash -2130170379, now seen corresponding path program 1 times [2020-12-22 07:40:02,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:40:02,168 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867540478] [2020-12-22 07:40:02,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:40:02,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:40:02,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:40:02,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867540478] [2020-12-22 07:40:02,252 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:40:02,253 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:40:02,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417347262] [2020-12-22 07:40:02,254 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:40:02,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:40:02,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:40:02,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:40:02,255 INFO L87 Difference]: Start difference. First operand 4101 states and 6558 transitions. Second operand 3 states. [2020-12-22 07:40:02,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:40:02,513 INFO L93 Difference]: Finished difference Result 8053 states and 12892 transitions. [2020-12-22 07:40:02,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:40:02,515 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 74 [2020-12-22 07:40:02,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:40:02,553 INFO L225 Difference]: With dead ends: 8053 [2020-12-22 07:40:02,554 INFO L226 Difference]: Without dead ends: 5741 [2020-12-22 07:40:02,562 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:40:02,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5741 states. [2020-12-22 07:40:02,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5741 to 5739. [2020-12-22 07:40:02,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5739 states. [2020-12-22 07:40:02,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5739 states to 5739 states and 9098 transitions. [2020-12-22 07:40:02,848 INFO L78 Accepts]: Start accepts. Automaton has 5739 states and 9098 transitions. Word has length 74 [2020-12-22 07:40:02,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:40:02,848 INFO L481 AbstractCegarLoop]: Abstraction has 5739 states and 9098 transitions. [2020-12-22 07:40:02,849 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:40:02,849 INFO L276 IsEmpty]: Start isEmpty. Operand 5739 states and 9098 transitions. [2020-12-22 07:40:02,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-12-22 07:40:02,850 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:40:02,850 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:40:02,850 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 07:40:02,850 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:40:02,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:40:02,851 INFO L82 PathProgramCache]: Analyzing trace with hash 339461557, now seen corresponding path program 1 times [2020-12-22 07:40:02,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:40:02,851 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340775416] [2020-12-22 07:40:02,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:40:02,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:40:02,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:40:02,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340775416] [2020-12-22 07:40:02,913 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:40:02,913 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:40:02,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966954374] [2020-12-22 07:40:02,913 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:40:02,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:40:02,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:40:02,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:40:02,916 INFO L87 Difference]: Start difference. First operand 5739 states and 9098 transitions. Second operand 3 states. [2020-12-22 07:40:03,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:40:03,255 INFO L93 Difference]: Finished difference Result 13696 states and 21823 transitions. [2020-12-22 07:40:03,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:40:03,256 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 74 [2020-12-22 07:40:03,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:40:03,308 INFO L225 Difference]: With dead ends: 13696 [2020-12-22 07:40:03,308 INFO L226 Difference]: Without dead ends: 8043 [2020-12-22 07:40:03,318 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:40:03,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8043 states. [2020-12-22 07:40:03,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8043 to 8041. [2020-12-22 07:40:03,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8041 states. [2020-12-22 07:40:03,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8041 states to 8041 states and 12783 transitions. [2020-12-22 07:40:03,764 INFO L78 Accepts]: Start accepts. Automaton has 8041 states and 12783 transitions. Word has length 74 [2020-12-22 07:40:03,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:40:03,764 INFO L481 AbstractCegarLoop]: Abstraction has 8041 states and 12783 transitions. [2020-12-22 07:40:03,765 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:40:03,765 INFO L276 IsEmpty]: Start isEmpty. Operand 8041 states and 12783 transitions. [2020-12-22 07:40:03,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-12-22 07:40:03,765 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:40:03,766 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:40:03,766 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 07:40:03,766 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:40:03,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:40:03,767 INFO L82 PathProgramCache]: Analyzing trace with hash -1704077331, now seen corresponding path program 1 times [2020-12-22 07:40:03,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:40:03,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355381127] [2020-12-22 07:40:03,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:40:03,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:40:03,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:40:03,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355381127] [2020-12-22 07:40:03,899 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:40:03,899 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:40:03,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909057955] [2020-12-22 07:40:03,900 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:40:03,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:40:03,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:40:03,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:40:03,901 INFO L87 Difference]: Start difference. First operand 8041 states and 12783 transitions. Second operand 4 states. [2020-12-22 07:40:04,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:40:04,566 INFO L93 Difference]: Finished difference Result 25448 states and 40536 transitions. [2020-12-22 07:40:04,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:40:04,567 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 75 [2020-12-22 07:40:04,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:40:04,614 INFO L225 Difference]: With dead ends: 25448 [2020-12-22 07:40:04,615 INFO L226 Difference]: Without dead ends: 17493 [2020-12-22 07:40:04,629 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:40:04,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17493 states. [2020-12-22 07:40:05,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17493 to 12714. [2020-12-22 07:40:05,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12714 states. [2020-12-22 07:40:05,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12714 states to 12714 states and 20070 transitions. [2020-12-22 07:40:05,390 INFO L78 Accepts]: Start accepts. Automaton has 12714 states and 20070 transitions. Word has length 75 [2020-12-22 07:40:05,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:40:05,391 INFO L481 AbstractCegarLoop]: Abstraction has 12714 states and 20070 transitions. [2020-12-22 07:40:05,391 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:40:05,391 INFO L276 IsEmpty]: Start isEmpty. Operand 12714 states and 20070 transitions. [2020-12-22 07:40:05,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 07:40:05,392 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:40:05,392 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:40:05,392 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 07:40:05,394 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:40:05,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:40:05,394 INFO L82 PathProgramCache]: Analyzing trace with hash 931672261, now seen corresponding path program 1 times [2020-12-22 07:40:05,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:40:05,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842956163] [2020-12-22 07:40:05,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:40:05,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:40:05,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:40:05,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842956163] [2020-12-22 07:40:05,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:40:05,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:40:05,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806648648] [2020-12-22 07:40:05,606 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:40:05,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:40:05,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:40:05,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:40:05,608 INFO L87 Difference]: Start difference. First operand 12714 states and 20070 transitions. Second operand 4 states. [2020-12-22 07:40:06,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:40:06,710 INFO L93 Difference]: Finished difference Result 37740 states and 59503 transitions. [2020-12-22 07:40:06,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:40:06,711 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 77 [2020-12-22 07:40:06,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:40:06,922 INFO L225 Difference]: With dead ends: 37740 [2020-12-22 07:40:06,922 INFO L226 Difference]: Without dead ends: 25035 [2020-12-22 07:40:06,956 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:40:06,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25035 states. [2020-12-22 07:40:08,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25035 to 25033. [2020-12-22 07:40:08,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25033 states. [2020-12-22 07:40:08,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25033 states to 25033 states and 39242 transitions. [2020-12-22 07:40:08,198 INFO L78 Accepts]: Start accepts. Automaton has 25033 states and 39242 transitions. Word has length 77 [2020-12-22 07:40:08,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:40:08,199 INFO L481 AbstractCegarLoop]: Abstraction has 25033 states and 39242 transitions. [2020-12-22 07:40:08,199 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:40:08,199 INFO L276 IsEmpty]: Start isEmpty. Operand 25033 states and 39242 transitions. [2020-12-22 07:40:08,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 07:40:08,200 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:40:08,201 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:40:08,201 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 07:40:08,201 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:40:08,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:40:08,202 INFO L82 PathProgramCache]: Analyzing trace with hash 1466579386, now seen corresponding path program 1 times [2020-12-22 07:40:08,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:40:08,202 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760659417] [2020-12-22 07:40:08,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:40:08,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:40:08,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:40:08,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760659417] [2020-12-22 07:40:08,260 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:40:08,260 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:40:08,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915776773] [2020-12-22 07:40:08,261 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:40:08,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:40:08,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:40:08,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:40:08,262 INFO L87 Difference]: Start difference. First operand 25033 states and 39242 transitions. Second operand 3 states. [2020-12-22 07:40:09,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:40:09,409 INFO L93 Difference]: Finished difference Result 58583 states and 91632 transitions. [2020-12-22 07:40:09,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:40:09,410 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 78 [2020-12-22 07:40:09,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:40:09,499 INFO L225 Difference]: With dead ends: 58583 [2020-12-22 07:40:09,499 INFO L226 Difference]: Without dead ends: 33679 [2020-12-22 07:40:09,535 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:40:09,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33679 states. [2020-12-22 07:40:11,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33679 to 32767. [2020-12-22 07:40:11,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32767 states. [2020-12-22 07:40:11,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32767 states to 32767 states and 50640 transitions. [2020-12-22 07:40:11,081 INFO L78 Accepts]: Start accepts. Automaton has 32767 states and 50640 transitions. Word has length 78 [2020-12-22 07:40:11,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:40:11,082 INFO L481 AbstractCegarLoop]: Abstraction has 32767 states and 50640 transitions. [2020-12-22 07:40:11,082 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:40:11,082 INFO L276 IsEmpty]: Start isEmpty. Operand 32767 states and 50640 transitions. [2020-12-22 07:40:11,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 07:40:11,083 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:40:11,083 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:40:11,084 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 07:40:11,084 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:40:11,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:40:11,085 INFO L82 PathProgramCache]: Analyzing trace with hash 295226641, now seen corresponding path program 1 times [2020-12-22 07:40:11,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:40:11,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120604814] [2020-12-22 07:40:11,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:40:11,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:40:11,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:40:11,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120604814] [2020-12-22 07:40:11,122 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:40:11,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:40:11,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356378271] [2020-12-22 07:40:11,123 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:40:11,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:40:11,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:40:11,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:40:11,124 INFO L87 Difference]: Start difference. First operand 32767 states and 50640 transitions. Second operand 3 states. [2020-12-22 07:40:13,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:40:13,244 INFO L93 Difference]: Finished difference Result 98263 states and 151858 transitions. [2020-12-22 07:40:13,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:40:13,246 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 78 [2020-12-22 07:40:13,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:40:13,559 INFO L225 Difference]: With dead ends: 98263 [2020-12-22 07:40:13,559 INFO L226 Difference]: Without dead ends: 65524 [2020-12-22 07:40:13,601 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:40:13,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65524 states. [2020-12-22 07:40:15,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65524 to 32769. [2020-12-22 07:40:15,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32769 states. [2020-12-22 07:40:15,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32769 states to 32769 states and 50642 transitions. [2020-12-22 07:40:15,563 INFO L78 Accepts]: Start accepts. Automaton has 32769 states and 50642 transitions. Word has length 78 [2020-12-22 07:40:15,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:40:15,564 INFO L481 AbstractCegarLoop]: Abstraction has 32769 states and 50642 transitions. [2020-12-22 07:40:15,564 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:40:15,564 INFO L276 IsEmpty]: Start isEmpty. Operand 32769 states and 50642 transitions. [2020-12-22 07:40:15,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 07:40:15,565 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:40:15,565 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:40:15,566 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 07:40:15,566 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:40:15,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:40:15,567 INFO L82 PathProgramCache]: Analyzing trace with hash -57061967, now seen corresponding path program 1 times [2020-12-22 07:40:15,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:40:15,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961379671] [2020-12-22 07:40:15,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:40:15,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:40:15,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:40:15,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961379671] [2020-12-22 07:40:15,680 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:40:15,680 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:40:15,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986954542] [2020-12-22 07:40:15,681 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:40:15,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:40:15,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:40:15,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:40:15,682 INFO L87 Difference]: Start difference. First operand 32769 states and 50642 transitions. Second operand 4 states. [2020-12-22 07:40:17,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:40:17,892 INFO L93 Difference]: Finished difference Result 96769 states and 149304 transitions. [2020-12-22 07:40:17,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:40:17,892 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 79 [2020-12-22 07:40:17,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:40:18,026 INFO L225 Difference]: With dead ends: 96769 [2020-12-22 07:40:18,027 INFO L226 Difference]: Without dead ends: 64030 [2020-12-22 07:40:18,055 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:40:18,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64030 states. [2020-12-22 07:40:20,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64030 to 64028. [2020-12-22 07:40:20,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64028 states. [2020-12-22 07:40:20,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64028 states to 64028 states and 98090 transitions. [2020-12-22 07:40:20,674 INFO L78 Accepts]: Start accepts. Automaton has 64028 states and 98090 transitions. Word has length 79 [2020-12-22 07:40:20,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:40:20,674 INFO L481 AbstractCegarLoop]: Abstraction has 64028 states and 98090 transitions. [2020-12-22 07:40:20,674 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:40:20,674 INFO L276 IsEmpty]: Start isEmpty. Operand 64028 states and 98090 transitions. [2020-12-22 07:40:20,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 07:40:20,676 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:40:20,676 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:40:20,676 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 07:40:20,676 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:40:20,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:40:20,677 INFO L82 PathProgramCache]: Analyzing trace with hash -1163177193, now seen corresponding path program 1 times [2020-12-22 07:40:20,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:40:20,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602288887] [2020-12-22 07:40:20,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:40:20,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:40:20,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:40:20,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602288887] [2020-12-22 07:40:20,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:40:20,725 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:40:20,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529808862] [2020-12-22 07:40:20,726 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:40:20,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:40:20,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:40:20,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:40:20,727 INFO L87 Difference]: Start difference. First operand 64028 states and 98090 transitions. Second operand 3 states. [2020-12-22 07:40:23,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:40:23,778 INFO L93 Difference]: Finished difference Result 154916 states and 238318 transitions. [2020-12-22 07:40:23,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:40:23,781 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 80 [2020-12-22 07:40:23,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:40:24,069 INFO L225 Difference]: With dead ends: 154916 [2020-12-22 07:40:24,069 INFO L226 Difference]: Without dead ends: 91168 [2020-12-22 07:40:24,157 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:40:24,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91168 states. [2020-12-22 07:40:27,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91168 to 88502. [2020-12-22 07:40:27,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88502 states. [2020-12-22 07:40:27,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88502 states to 88502 states and 134830 transitions. [2020-12-22 07:40:27,701 INFO L78 Accepts]: Start accepts. Automaton has 88502 states and 134830 transitions. Word has length 80 [2020-12-22 07:40:27,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:40:27,701 INFO L481 AbstractCegarLoop]: Abstraction has 88502 states and 134830 transitions. [2020-12-22 07:40:27,701 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:40:27,702 INFO L276 IsEmpty]: Start isEmpty. Operand 88502 states and 134830 transitions. [2020-12-22 07:40:27,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 07:40:27,703 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:40:27,703 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:40:27,703 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 07:40:27,703 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:40:27,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:40:27,704 INFO L82 PathProgramCache]: Analyzing trace with hash -544448643, now seen corresponding path program 1 times [2020-12-22 07:40:27,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:40:27,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728993405] [2020-12-22 07:40:27,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:40:27,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:40:27,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:40:27,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728993405] [2020-12-22 07:40:27,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:40:27,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:40:27,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661136266] [2020-12-22 07:40:27,739 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:40:27,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:40:27,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:40:27,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:40:27,740 INFO L87 Difference]: Start difference. First operand 88502 states and 134830 transitions. Second operand 3 states. [2020-12-22 07:40:32,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:40:32,984 INFO L93 Difference]: Finished difference Result 265430 states and 404370 transitions. [2020-12-22 07:40:32,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:40:32,984 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 80 [2020-12-22 07:40:32,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:40:33,304 INFO L225 Difference]: With dead ends: 265430 [2020-12-22 07:40:33,304 INFO L226 Difference]: Without dead ends: 176972 [2020-12-22 07:40:33,407 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:40:33,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176972 states. [2020-12-22 07:40:37,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176972 to 88506. [2020-12-22 07:40:37,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88506 states. [2020-12-22 07:40:37,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88506 states to 88506 states and 134834 transitions. [2020-12-22 07:40:37,702 INFO L78 Accepts]: Start accepts. Automaton has 88506 states and 134834 transitions. Word has length 80 [2020-12-22 07:40:37,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:40:37,702 INFO L481 AbstractCegarLoop]: Abstraction has 88506 states and 134834 transitions. [2020-12-22 07:40:37,702 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:40:37,702 INFO L276 IsEmpty]: Start isEmpty. Operand 88506 states and 134834 transitions. [2020-12-22 07:40:37,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 07:40:37,704 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:40:37,704 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:40:37,704 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 07:40:37,704 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:40:37,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:40:37,705 INFO L82 PathProgramCache]: Analyzing trace with hash 2051256477, now seen corresponding path program 1 times [2020-12-22 07:40:37,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:40:37,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722656974] [2020-12-22 07:40:37,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:40:37,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:40:37,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:40:37,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722656974] [2020-12-22 07:40:37,865 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:40:37,865 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:40:37,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845277767] [2020-12-22 07:40:37,867 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:40:37,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:40:37,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:40:37,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:40:37,868 INFO L87 Difference]: Start difference. First operand 88506 states and 134834 transitions. Second operand 4 states. [2020-12-22 07:40:43,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:40:43,737 INFO L93 Difference]: Finished difference Result 261266 states and 397258 transitions. [2020-12-22 07:40:43,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:40:43,738 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 81 [2020-12-22 07:40:43,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:40:44,038 INFO L225 Difference]: With dead ends: 261266 [2020-12-22 07:40:44,039 INFO L226 Difference]: Without dead ends: 172808 [2020-12-22 07:40:44,111 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:40:44,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172808 states. [2020-12-22 07:40:50,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172808 to 172806. [2020-12-22 07:40:50,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172806 states. [2020-12-22 07:40:51,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172806 states to 172806 states and 260760 transitions. [2020-12-22 07:40:51,201 INFO L78 Accepts]: Start accepts. Automaton has 172806 states and 260760 transitions. Word has length 81 [2020-12-22 07:40:51,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:40:51,201 INFO L481 AbstractCegarLoop]: Abstraction has 172806 states and 260760 transitions. [2020-12-22 07:40:51,201 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:40:51,201 INFO L276 IsEmpty]: Start isEmpty. Operand 172806 states and 260760 transitions. [2020-12-22 07:40:51,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 07:40:51,203 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:40:51,203 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:40:51,203 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 07:40:51,203 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:40:51,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:40:51,204 INFO L82 PathProgramCache]: Analyzing trace with hash -2106822348, now seen corresponding path program 1 times [2020-12-22 07:40:51,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:40:51,204 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952111913] [2020-12-22 07:40:51,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:40:51,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:40:51,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:40:51,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952111913] [2020-12-22 07:40:51,257 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:40:51,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:40:51,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661526519] [2020-12-22 07:40:51,258 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:40:51,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:40:51,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:40:51,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:40:51,259 INFO L87 Difference]: Start difference. First operand 172806 states and 260760 transitions. Second operand 3 states. [2020-12-22 07:40:59,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:40:59,821 INFO L93 Difference]: Finished difference Result 418970 states and 635738 transitions. [2020-12-22 07:40:59,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:40:59,821 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 82 [2020-12-22 07:40:59,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:41:00,335 INFO L225 Difference]: With dead ends: 418970 [2020-12-22 07:41:00,335 INFO L226 Difference]: Without dead ends: 246728 [2020-12-22 07:41:00,730 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:41:00,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246728 states. [2020-12-22 07:41:10,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246728 to 238406. [2020-12-22 07:41:10,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238406 states. [2020-12-22 07:41:11,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238406 states to 238406 states and 357016 transitions. [2020-12-22 07:41:11,065 INFO L78 Accepts]: Start accepts. Automaton has 238406 states and 357016 transitions. Word has length 82 [2020-12-22 07:41:11,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:41:11,065 INFO L481 AbstractCegarLoop]: Abstraction has 238406 states and 357016 transitions. [2020-12-22 07:41:11,065 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:41:11,065 INFO L276 IsEmpty]: Start isEmpty. Operand 238406 states and 357016 transitions. [2020-12-22 07:41:11,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 07:41:11,067 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:41:11,067 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, 1, 1, 1, 1, 1] [2020-12-22 07:41:11,068 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 07:41:11,068 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:41:11,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:41:11,068 INFO L82 PathProgramCache]: Analyzing trace with hash -565045271, now seen corresponding path program 1 times [2020-12-22 07:41:11,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:41:11,069 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960742177] [2020-12-22 07:41:11,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:41:11,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:41:11,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:41:11,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960742177] [2020-12-22 07:41:11,112 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:41:11,112 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:41:11,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952681337] [2020-12-22 07:41:11,113 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:41:11,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:41:11,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:41:11,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:41:11,114 INFO L87 Difference]: Start difference. First operand 238406 states and 357016 transitions. Second operand 3 states. [2020-12-22 07:41:27,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:41:27,963 INFO L93 Difference]: Finished difference Result 714794 states and 1070502 transitions. [2020-12-22 07:41:27,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:41:27,963 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 82 [2020-12-22 07:41:27,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:41:29,264 INFO L225 Difference]: With dead ends: 714794 [2020-12-22 07:41:29,264 INFO L226 Difference]: Without dead ends: 476720 [2020-12-22 07:41:29,572 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:41:29,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476720 states. [2020-12-22 07:41:42,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476720 to 238414. [2020-12-22 07:41:42,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238414 states. [2020-12-22 07:41:43,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238414 states to 238414 states and 357024 transitions. [2020-12-22 07:41:43,382 INFO L78 Accepts]: Start accepts. Automaton has 238414 states and 357024 transitions. Word has length 82 [2020-12-22 07:41:43,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:41:43,382 INFO L481 AbstractCegarLoop]: Abstraction has 238414 states and 357024 transitions. [2020-12-22 07:41:43,383 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:41:43,383 INFO L276 IsEmpty]: Start isEmpty. Operand 238414 states and 357024 transitions. [2020-12-22 07:41:43,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 07:41:43,385 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:41:43,385 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:41:43,386 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 07:41:43,387 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:41:43,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:41:43,388 INFO L82 PathProgramCache]: Analyzing trace with hash 1283476260, now seen corresponding path program 1 times [2020-12-22 07:41:43,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:41:43,389 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911969615] [2020-12-22 07:41:43,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:41:43,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:41:43,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:41:43,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911969615] [2020-12-22 07:41:43,611 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:41:43,611 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:41:43,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571700276] [2020-12-22 07:41:43,615 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:41:43,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:41:43,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:41:43,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:41:43,616 INFO L87 Difference]: Start difference. First operand 238414 states and 357024 transitions. Second operand 5 states. [2020-12-22 07:42:03,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:42:03,408 INFO L93 Difference]: Finished difference Result 673280 states and 1007209 transitions. [2020-12-22 07:42:03,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:42:03,411 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 83 [2020-12-22 07:42:03,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:42:04,365 INFO L225 Difference]: With dead ends: 673280 [2020-12-22 07:42:04,365 INFO L226 Difference]: Without dead ends: 434954 [2020-12-22 07:42:04,921 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:42:05,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434954 states. [2020-12-22 07:42:24,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434954 to 434952. [2020-12-22 07:42:24,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 434952 states. [2020-12-22 07:42:25,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434952 states to 434952 states and 644545 transitions. [2020-12-22 07:42:25,992 INFO L78 Accepts]: Start accepts. Automaton has 434952 states and 644545 transitions. Word has length 83 [2020-12-22 07:42:25,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:42:25,992 INFO L481 AbstractCegarLoop]: Abstraction has 434952 states and 644545 transitions. [2020-12-22 07:42:25,993 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:42:25,993 INFO L276 IsEmpty]: Start isEmpty. Operand 434952 states and 644545 transitions. [2020-12-22 07:42:25,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 07:42:25,999 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:42:26,000 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:42:26,000 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 07:42:26,000 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:42:26,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:42:26,001 INFO L82 PathProgramCache]: Analyzing trace with hash -2141300343, now seen corresponding path program 1 times [2020-12-22 07:42:26,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:42:26,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019119153] [2020-12-22 07:42:26,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:42:26,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:42:26,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:42:26,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019119153] [2020-12-22 07:42:26,144 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:42:26,144 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:42:26,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40064491] [2020-12-22 07:42:26,147 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:42:26,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:42:26,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:42:26,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:42:26,148 INFO L87 Difference]: Start difference. First operand 434952 states and 644545 transitions. Second operand 4 states. [2020-12-22 07:42:44,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:42:44,238 INFO L93 Difference]: Finished difference Result 773142 states and 1143915 transitions. [2020-12-22 07:42:44,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:42:44,239 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 83 [2020-12-22 07:42:44,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:42:45,172 INFO L225 Difference]: With dead ends: 773142 [2020-12-22 07:42:45,173 INFO L226 Difference]: Without dead ends: 338264 [2020-12-22 07:42:45,487 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:42:45,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338264 states. [2020-12-22 07:43:00,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338264 to 338264. [2020-12-22 07:43:00,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 338264 states. [2020-12-22 07:43:01,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338264 states to 338264 states and 499473 transitions. [2020-12-22 07:43:01,830 INFO L78 Accepts]: Start accepts. Automaton has 338264 states and 499473 transitions. Word has length 83 [2020-12-22 07:43:01,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:43:01,830 INFO L481 AbstractCegarLoop]: Abstraction has 338264 states and 499473 transitions. [2020-12-22 07:43:01,830 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:43:01,830 INFO L276 IsEmpty]: Start isEmpty. Operand 338264 states and 499473 transitions. [2020-12-22 07:43:01,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-22 07:43:01,833 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:43:01,834 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:43:01,834 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 07:43:01,834 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:43:01,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:43:01,846 INFO L82 PathProgramCache]: Analyzing trace with hash -1610663161, now seen corresponding path program 1 times [2020-12-22 07:43:01,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:43:01,846 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800834464] [2020-12-22 07:43:01,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:43:01,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:43:01,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:43:01,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800834464] [2020-12-22 07:43:01,971 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:43:01,971 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:43:01,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401576279] [2020-12-22 07:43:01,971 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:43:01,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:43:01,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:43:01,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:43:01,975 INFO L87 Difference]: Start difference. First operand 338264 states and 499473 transitions. Second operand 4 states.