/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-reduced/pals_lcr.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 10:58:29,320 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 10:58:29,323 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 10:58:29,358 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 10:58:29,359 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 10:58:29,360 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 10:58:29,362 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 10:58:29,365 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 10:58:29,367 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 10:58:29,368 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 10:58:29,369 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 10:58:29,371 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 10:58:29,371 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 10:58:29,373 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 10:58:29,374 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 10:58:29,375 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 10:58:29,389 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 10:58:29,395 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 10:58:29,399 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 10:58:29,404 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 10:58:29,408 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 10:58:29,410 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 10:58:29,415 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 10:58:29,416 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 10:58:29,425 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-23 10:58:29,426 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-23 10:58:29,426 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-23 10:58:29,430 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-23 10:58:29,430 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-23 10:58:29,431 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-23 10:58:29,432 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 10:58:29,435 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 10:58:29,436 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 10:58:29,437 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 10:58:29,441 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 10:58:29,441 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 10:58:29,443 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 10:58:29,443 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 10:58:29,444 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 10:58:29,445 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 10:58:29,446 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 10:58:29,451 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 10:58:29,499 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 10:58:29,499 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 10:58:29,505 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 10:58:29,505 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 10:58:29,505 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 10:58:29,506 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 10:58:29,506 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 10:58:29,506 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 10:58:29,506 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 10:58:29,506 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 10:58:29,508 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 10:58:29,508 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 10:58:29,508 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 10:58:29,508 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 10:58:29,509 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 10:58:29,509 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 10:58:29,509 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 10:58:29,509 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 10:58:29,510 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 10:58:29,510 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 10:58:29,510 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 10:58:29,510 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 10:58:29,510 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 10:58:29,511 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 10:58:29,511 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 10:58:29,511 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-bitabs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 10:58:29,937 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 10:58:29,962 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 10:58:29,965 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 10:58:29,967 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 10:58:29,968 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 10:58:29,969 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-12-23 10:58:30,045 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/76e31f38a/db3593803f2f40aeafbe3e5b66eb5907/FLAGc60e7eb4d [2020-12-23 10:58:30,723 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 10:58:30,723 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-12-23 10:58:30,741 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/76e31f38a/db3593803f2f40aeafbe3e5b66eb5907/FLAGc60e7eb4d [2020-12-23 10:58:31,023 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/76e31f38a/db3593803f2f40aeafbe3e5b66eb5907 [2020-12-23 10:58:31,026 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 10:58:31,028 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 10:58:31,030 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 10:58:31,030 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 10:58:31,034 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 10:58:31,035 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 10:58:31" (1/1) ... [2020-12-23 10:58:31,036 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3cc7edf6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 10:58:31, skipping insertion in model container [2020-12-23 10:58:31,037 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 10:58:31" (1/1) ... [2020-12-23 10:58:31,046 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 10:58:31,107 INFO L178 MainTranslator]: Built tables and reachable declarations left hand side expression in assignment: lhs: VariableLHS[~main__c1~0,] left hand side expression in assignment: lhs: VariableLHS[~r1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~id1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~st1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~id2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~st2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~id3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~st3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~init__tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~__return_1411~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~main__i2~0,] left hand side expression in assignment: lhs: VariableLHS[~p1_old~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p1_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p2_old~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p2_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p3_old~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p3_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~main__i2~0,] left hand side expression in assignment: lhs: VariableLHS[~node1__m1~0,] left hand side expression in assignment: lhs: VariableLHS[~r1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~node1__m1~0,] left hand side expression in assignment: lhs: VariableLHS[~p3_old~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~node2__m2~0,] left hand side expression in assignment: lhs: VariableLHS[~node2__m2~0,] left hand side expression in assignment: lhs: VariableLHS[~p1_old~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~node3__m3~0,] left hand side expression in assignment: lhs: VariableLHS[~node3__m3~0,] left hand side expression in assignment: lhs: VariableLHS[~p2_old~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p1_old~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p1_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p2_old~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p2_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p3_old~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p3_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~check__tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~__return_1487~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~main__c1~0,] left hand side expression in assignment: lhs: VariableLHS[~__tmp_1~0,] left hand side expression in assignment: lhs: VariableLHS[~assert__arg~0,] [2020-12-23 10:58:31,331 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c[3665,3678] left hand side expression in assignment: lhs: VariableLHS[~main__i2~0,] left hand side expression in assignment: lhs: VariableLHS[~check__tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~check__tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~check__tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~check__tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~st3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~node3____CPAchecker_TMP_0~0,] left hand side expression in assignment: lhs: VariableLHS[~p3_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~node3____CPAchecker_TMP_0~0,] left hand side expression in assignment: lhs: VariableLHS[~st2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~node2____CPAchecker_TMP_0~0,] left hand side expression in assignment: lhs: VariableLHS[~p2_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~node2____CPAchecker_TMP_0~0,] left hand side expression in assignment: lhs: VariableLHS[~st1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~node1____CPAchecker_TMP_0~0,] left hand side expression in assignment: lhs: VariableLHS[~p1_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~node1____CPAchecker_TMP_0~0,] left hand side expression in assignment: lhs: VariableLHS[~__return_1543~0,GLOBAL] [2020-12-23 10:58:31,355 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 10:58:31,371 INFO L203 MainTranslator]: Completed pre-run left hand side expression in assignment: lhs: VariableLHS[~main__c1~0,] left hand side expression in assignment: lhs: VariableLHS[~r1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~id1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~st1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~id2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~st2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~id3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~st3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~init__tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~__return_1411~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~main__i2~0,] left hand side expression in assignment: lhs: VariableLHS[~p1_old~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p1_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p2_old~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p2_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p3_old~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p3_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~main__i2~0,] left hand side expression in assignment: lhs: VariableLHS[~node1__m1~0,] left hand side expression in assignment: lhs: VariableLHS[~r1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~node1__m1~0,] left hand side expression in assignment: lhs: VariableLHS[~p3_old~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~node2__m2~0,] left hand side expression in assignment: lhs: VariableLHS[~node2__m2~0,] left hand side expression in assignment: lhs: VariableLHS[~p1_old~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~node3__m3~0,] left hand side expression in assignment: lhs: VariableLHS[~node3__m3~0,] left hand side expression in assignment: lhs: VariableLHS[~p2_old~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p1_old~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p1_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p2_old~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p2_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p3_old~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p3_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~check__tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~__return_1487~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~main__c1~0,] left hand side expression in assignment: lhs: VariableLHS[~__tmp_1~0,] left hand side expression in assignment: lhs: VariableLHS[~assert__arg~0,] [2020-12-23 10:58:31,412 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c[3665,3678] left hand side expression in assignment: lhs: VariableLHS[~main__i2~0,] left hand side expression in assignment: lhs: VariableLHS[~check__tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~check__tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~check__tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~check__tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~st3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~node3____CPAchecker_TMP_0~0,] left hand side expression in assignment: lhs: VariableLHS[~p3_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~node3____CPAchecker_TMP_0~0,] left hand side expression in assignment: lhs: VariableLHS[~st2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~node2____CPAchecker_TMP_0~0,] left hand side expression in assignment: lhs: VariableLHS[~p2_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~node2____CPAchecker_TMP_0~0,] left hand side expression in assignment: lhs: VariableLHS[~st1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~node1____CPAchecker_TMP_0~0,] left hand side expression in assignment: lhs: VariableLHS[~p1_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~node1____CPAchecker_TMP_0~0,] left hand side expression in assignment: lhs: VariableLHS[~__return_1543~0,GLOBAL] [2020-12-23 10:58:31,427 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 10:58:31,450 INFO L208 MainTranslator]: Completed translation [2020-12-23 10:58:31,451 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 10:58:31 WrapperNode [2020-12-23 10:58:31,451 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 10:58:31,452 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 10:58:31,452 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 10:58:31,452 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 10:58:31,468 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 10:58:31" (1/1) ... [2020-12-23 10:58:31,480 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 10:58:31" (1/1) ... [2020-12-23 10:58:31,513 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 10:58:31,514 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 10:58:31,514 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 10:58:31,515 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 10:58:31,524 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 10:58:31" (1/1) ... [2020-12-23 10:58:31,524 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 10:58:31" (1/1) ... [2020-12-23 10:58:31,528 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 10:58:31" (1/1) ... [2020-12-23 10:58:31,528 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 10:58:31" (1/1) ... [2020-12-23 10:58:31,539 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 10:58:31" (1/1) ... [2020-12-23 10:58:31,551 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 10:58:31" (1/1) ... [2020-12-23 10:58:31,559 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 10:58:31" (1/1) ... [2020-12-23 10:58:31,563 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 10:58:31,565 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 10:58:31,565 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 10:58:31,565 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 10:58:31,566 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 10:58:31" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 10:58:31,659 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 10:58:31,660 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 10:58:31,660 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 10:58:31,660 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 10:58:32,190 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 10:58:32,190 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-23 10:58:32,196 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 10:58:32 BoogieIcfgContainer [2020-12-23 10:58:32,196 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 10:58:32,201 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 10:58:32,201 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 10:58:32,209 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 10:58:32,209 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 10:58:31" (1/3) ... [2020-12-23 10:58:32,213 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e272236 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 10:58:32, skipping insertion in model container [2020-12-23 10:58:32,214 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 10:58:31" (2/3) ... [2020-12-23 10:58:32,214 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e272236 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 10:58:32, skipping insertion in model container [2020-12-23 10:58:32,214 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 10:58:32" (3/3) ... [2020-12-23 10:58:32,220 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-12-23 10:58:32,234 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 10:58:32,250 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 10:58:32,284 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 10:58:32,314 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 10:58:32,314 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 10:58:32,314 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 10:58:32,314 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 10:58:32,314 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 10:58:32,315 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 10:58:32,315 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 10:58:32,315 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 10:58:32,332 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states. [2020-12-23 10:58:32,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-23 10:58:32,340 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 10:58:32,340 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] [2020-12-23 10:58:32,341 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 10:58:32,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 10:58:32,347 INFO L82 PathProgramCache]: Analyzing trace with hash -1007825277, now seen corresponding path program 1 times [2020-12-23 10:58:32,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 10:58:32,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655207520] [2020-12-23 10:58:32,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 10:58:32,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 10:58:32,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 10:58:32,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655207520] [2020-12-23 10:58:32,809 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 10:58:32,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 10:58:32,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379387024] [2020-12-23 10:58:32,817 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 10:58:32,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 10:58:32,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 10:58:32,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 10:58:32,838 INFO L87 Difference]: Start difference. First operand 62 states. Second operand 3 states. [2020-12-23 10:58:32,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 10:58:32,916 INFO L93 Difference]: Finished difference Result 140 states and 224 transitions. [2020-12-23 10:58:32,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 10:58:32,918 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 36 [2020-12-23 10:58:32,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 10:58:32,940 INFO L225 Difference]: With dead ends: 140 [2020-12-23 10:58:32,940 INFO L226 Difference]: Without dead ends: 91 [2020-12-23 10:58:32,945 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 [2020-12-23 10:58:32,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-12-23 10:58:33,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 89. [2020-12-23 10:58:33,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-12-23 10:58:33,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 130 transitions. [2020-12-23 10:58:33,028 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 130 transitions. Word has length 36 [2020-12-23 10:58:33,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 10:58:33,029 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 130 transitions. [2020-12-23 10:58:33,029 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 10:58:33,030 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 130 transitions. [2020-12-23 10:58:33,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-23 10:58:33,033 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 10:58:33,033 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] [2020-12-23 10:58:33,034 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 10:58:33,035 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 10:58:33,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 10:58:33,040 INFO L82 PathProgramCache]: Analyzing trace with hash 1176817218, now seen corresponding path program 1 times [2020-12-23 10:58:33,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 10:58:33,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388844109] [2020-12-23 10:58:33,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 10:58:33,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 10:58:33,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 10:58:33,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388844109] [2020-12-23 10:58:33,233 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 10:58:33,233 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 10:58:33,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627069769] [2020-12-23 10:58:33,235 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 10:58:33,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 10:58:33,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 10:58:33,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 10:58:33,237 INFO L87 Difference]: Start difference. First operand 89 states and 130 transitions. Second operand 3 states. [2020-12-23 10:58:33,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 10:58:33,323 INFO L93 Difference]: Finished difference Result 213 states and 326 transitions. [2020-12-23 10:58:33,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 10:58:33,324 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 37 [2020-12-23 10:58:33,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 10:58:33,329 INFO L225 Difference]: With dead ends: 213 [2020-12-23 10:58:33,329 INFO L226 Difference]: Without dead ends: 143 [2020-12-23 10:58:33,330 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 [2020-12-23 10:58:33,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-12-23 10:58:33,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 141. [2020-12-23 10:58:33,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-12-23 10:58:33,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 212 transitions. [2020-12-23 10:58:33,367 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 212 transitions. Word has length 37 [2020-12-23 10:58:33,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 10:58:33,367 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 212 transitions. [2020-12-23 10:58:33,367 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 10:58:33,368 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 212 transitions. [2020-12-23 10:58:33,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-23 10:58:33,369 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 10:58:33,369 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 10:58:33,369 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 10:58:33,370 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 10:58:33,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 10:58:33,371 INFO L82 PathProgramCache]: Analyzing trace with hash 761408425, now seen corresponding path program 1 times [2020-12-23 10:58:33,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 10:58:33,371 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706600904] [2020-12-23 10:58:33,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 10:58:33,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 10:58:33,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 10:58:33,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706600904] [2020-12-23 10:58:33,445 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 10:58:33,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 10:58:33,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147680602] [2020-12-23 10:58:33,447 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 10:58:33,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 10:58:33,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 10:58:33,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 10:58:33,448 INFO L87 Difference]: Start difference. First operand 141 states and 212 transitions. Second operand 3 states. [2020-12-23 10:58:33,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 10:58:33,506 INFO L93 Difference]: Finished difference Result 353 states and 546 transitions. [2020-12-23 10:58:33,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 10:58:33,507 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 38 [2020-12-23 10:58:33,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 10:58:33,511 INFO L225 Difference]: With dead ends: 353 [2020-12-23 10:58:33,511 INFO L226 Difference]: Without dead ends: 231 [2020-12-23 10:58:33,513 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 [2020-12-23 10:58:33,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-12-23 10:58:33,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 229. [2020-12-23 10:58:33,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2020-12-23 10:58:33,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 348 transitions. [2020-12-23 10:58:33,553 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 348 transitions. Word has length 38 [2020-12-23 10:58:33,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 10:58:33,554 INFO L481 AbstractCegarLoop]: Abstraction has 229 states and 348 transitions. [2020-12-23 10:58:33,554 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 10:58:33,554 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 348 transitions. [2020-12-23 10:58:33,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-23 10:58:33,556 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 10:58:33,556 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] [2020-12-23 10:58:33,556 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-23 10:58:33,557 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 10:58:33,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 10:58:33,558 INFO L82 PathProgramCache]: Analyzing trace with hash 2014631486, now seen corresponding path program 1 times [2020-12-23 10:58:33,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 10:58:33,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559479103] [2020-12-23 10:58:33,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 10:58:33,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 10:58:33,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 10:58:33,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559479103] [2020-12-23 10:58:33,698 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 10:58:33,698 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 10:58:33,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088181613] [2020-12-23 10:58:33,699 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 10:58:33,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 10:58:33,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 10:58:33,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-23 10:58:33,700 INFO L87 Difference]: Start difference. First operand 229 states and 348 transitions. Second operand 5 states. [2020-12-23 10:58:33,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 10:58:33,809 INFO L93 Difference]: Finished difference Result 439 states and 677 transitions. [2020-12-23 10:58:33,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 10:58:33,810 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 39 [2020-12-23 10:58:33,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 10:58:33,812 INFO L225 Difference]: With dead ends: 439 [2020-12-23 10:58:33,813 INFO L226 Difference]: Without dead ends: 229 [2020-12-23 10:58:33,814 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-23 10:58:33,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-12-23 10:58:33,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 229. [2020-12-23 10:58:33,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2020-12-23 10:58:33,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 344 transitions. [2020-12-23 10:58:33,846 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 344 transitions. Word has length 39 [2020-12-23 10:58:33,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 10:58:33,846 INFO L481 AbstractCegarLoop]: Abstraction has 229 states and 344 transitions. [2020-12-23 10:58:33,847 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 10:58:33,847 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 344 transitions. [2020-12-23 10:58:33,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-23 10:58:33,848 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 10:58:33,848 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] [2020-12-23 10:58:33,848 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-23 10:58:33,849 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 10:58:33,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 10:58:33,849 INFO L82 PathProgramCache]: Analyzing trace with hash 172600953, now seen corresponding path program 1 times [2020-12-23 10:58:33,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 10:58:33,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128223327] [2020-12-23 10:58:33,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 10:58:33,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 10:58:33,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 10:58:33,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128223327] [2020-12-23 10:58:33,961 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 10:58:33,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 10:58:33,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217499531] [2020-12-23 10:58:33,963 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 10:58:33,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 10:58:33,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 10:58:33,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 10:58:33,964 INFO L87 Difference]: Start difference. First operand 229 states and 344 transitions. Second operand 5 states. [2020-12-23 10:58:34,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 10:58:34,110 INFO L93 Difference]: Finished difference Result 1069 states and 1644 transitions. [2020-12-23 10:58:34,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 10:58:34,111 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 39 [2020-12-23 10:58:34,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 10:58:34,117 INFO L225 Difference]: With dead ends: 1069 [2020-12-23 10:58:34,117 INFO L226 Difference]: Without dead ends: 859 [2020-12-23 10:58:34,120 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 10:58:34,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 859 states. [2020-12-23 10:58:34,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 859 to 437. [2020-12-23 10:58:34,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 437 states. [2020-12-23 10:58:34,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 652 transitions. [2020-12-23 10:58:34,186 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 652 transitions. Word has length 39 [2020-12-23 10:58:34,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 10:58:34,186 INFO L481 AbstractCegarLoop]: Abstraction has 437 states and 652 transitions. [2020-12-23 10:58:34,186 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 10:58:34,186 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 652 transitions. [2020-12-23 10:58:34,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-23 10:58:34,188 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 10:58:34,188 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] [2020-12-23 10:58:34,188 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-23 10:58:34,188 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 10:58:34,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 10:58:34,189 INFO L82 PathProgramCache]: Analyzing trace with hash 1738935381, now seen corresponding path program 1 times [2020-12-23 10:58:34,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 10:58:34,190 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787559403] [2020-12-23 10:58:34,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 10:58:34,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 10:58:34,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 10:58:34,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787559403] [2020-12-23 10:58:34,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 10:58:34,270 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 10:58:34,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743396465] [2020-12-23 10:58:34,271 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 10:58:34,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 10:58:34,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 10:58:34,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 10:58:34,272 INFO L87 Difference]: Start difference. First operand 437 states and 652 transitions. Second operand 3 states. [2020-12-23 10:58:34,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 10:58:34,364 INFO L93 Difference]: Finished difference Result 1055 states and 1584 transitions. [2020-12-23 10:58:34,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 10:58:34,364 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 41 [2020-12-23 10:58:34,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 10:58:34,369 INFO L225 Difference]: With dead ends: 1055 [2020-12-23 10:58:34,369 INFO L226 Difference]: Without dead ends: 637 [2020-12-23 10:58:34,370 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 [2020-12-23 10:58:34,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 637 states. [2020-12-23 10:58:34,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 637 to 635. [2020-12-23 10:58:34,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 635 states. [2020-12-23 10:58:34,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 938 transitions. [2020-12-23 10:58:34,443 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 938 transitions. Word has length 41 [2020-12-23 10:58:34,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 10:58:34,443 INFO L481 AbstractCegarLoop]: Abstraction has 635 states and 938 transitions. [2020-12-23 10:58:34,443 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 10:58:34,444 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 938 transitions. [2020-12-23 10:58:34,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-23 10:58:34,445 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 10:58:34,445 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] [2020-12-23 10:58:34,445 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-23 10:58:34,446 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 10:58:34,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 10:58:34,446 INFO L82 PathProgramCache]: Analyzing trace with hash 1759938036, now seen corresponding path program 1 times [2020-12-23 10:58:34,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 10:58:34,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366901879] [2020-12-23 10:58:34,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 10:58:34,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 10:58:34,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 10:58:34,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366901879] [2020-12-23 10:58:34,596 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 10:58:34,596 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 10:58:34,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724761414] [2020-12-23 10:58:34,597 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 10:58:34,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 10:58:34,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 10:58:34,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 10:58:34,598 INFO L87 Difference]: Start difference. First operand 635 states and 938 transitions. Second operand 5 states. [2020-12-23 10:58:34,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 10:58:34,784 INFO L93 Difference]: Finished difference Result 1767 states and 2648 transitions. [2020-12-23 10:58:34,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 10:58:34,785 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 41 [2020-12-23 10:58:34,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 10:58:34,792 INFO L225 Difference]: With dead ends: 1767 [2020-12-23 10:58:34,792 INFO L226 Difference]: Without dead ends: 1153 [2020-12-23 10:58:34,794 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 10:58:34,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1153 states. [2020-12-23 10:58:34,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1153 to 635. [2020-12-23 10:58:34,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 635 states. [2020-12-23 10:58:34,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 926 transitions. [2020-12-23 10:58:34,877 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 926 transitions. Word has length 41 [2020-12-23 10:58:34,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 10:58:34,877 INFO L481 AbstractCegarLoop]: Abstraction has 635 states and 926 transitions. [2020-12-23 10:58:34,878 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 10:58:34,878 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 926 transitions. [2020-12-23 10:58:34,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-23 10:58:34,879 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 10:58:34,879 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 10:58:34,879 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-23 10:58:34,879 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 10:58:34,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 10:58:34,880 INFO L82 PathProgramCache]: Analyzing trace with hash -1278405158, now seen corresponding path program 1 times [2020-12-23 10:58:34,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 10:58:34,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057777467] [2020-12-23 10:58:34,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 10:58:34,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 10:58:34,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 10:58:34,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057777467] [2020-12-23 10:58:34,953 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 10:58:34,953 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 10:58:34,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052909703] [2020-12-23 10:58:34,954 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 10:58:34,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 10:58:34,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 10:58:34,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-23 10:58:34,955 INFO L87 Difference]: Start difference. First operand 635 states and 926 transitions. Second operand 5 states. [2020-12-23 10:58:35,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 10:58:35,109 INFO L93 Difference]: Finished difference Result 1143 states and 1658 transitions. [2020-12-23 10:58:35,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 10:58:35,109 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 42 [2020-12-23 10:58:35,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 10:58:35,116 INFO L225 Difference]: With dead ends: 1143 [2020-12-23 10:58:35,116 INFO L226 Difference]: Without dead ends: 1141 [2020-12-23 10:58:35,117 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-23 10:58:35,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1141 states. [2020-12-23 10:58:35,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1141 to 667. [2020-12-23 10:58:35,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 667 states. [2020-12-23 10:58:35,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 667 states to 667 states and 954 transitions. [2020-12-23 10:58:35,202 INFO L78 Accepts]: Start accepts. Automaton has 667 states and 954 transitions. Word has length 42 [2020-12-23 10:58:35,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 10:58:35,203 INFO L481 AbstractCegarLoop]: Abstraction has 667 states and 954 transitions. [2020-12-23 10:58:35,203 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 10:58:35,203 INFO L276 IsEmpty]: Start isEmpty. Operand 667 states and 954 transitions. [2020-12-23 10:58:35,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-12-23 10:58:35,211 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 10:58:35,211 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 10:58:35,211 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-23 10:58:35,211 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 10:58:35,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 10:58:35,212 INFO L82 PathProgramCache]: Analyzing trace with hash 1616122195, now seen corresponding path program 1 times [2020-12-23 10:58:35,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 10:58:35,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174950706] [2020-12-23 10:58:35,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 10:58:35,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 10:58:35,359 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 10:58:35,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174950706] [2020-12-23 10:58:35,364 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 10:58:35,364 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 10:58:35,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791712682] [2020-12-23 10:58:35,366 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 10:58:35,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 10:58:35,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 10:58:35,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 10:58:35,369 INFO L87 Difference]: Start difference. First operand 667 states and 954 transitions. Second operand 5 states. [2020-12-23 10:58:35,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 10:58:35,661 INFO L93 Difference]: Finished difference Result 2735 states and 3928 transitions. [2020-12-23 10:58:35,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 10:58:35,661 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 60 [2020-12-23 10:58:35,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 10:58:35,677 INFO L225 Difference]: With dead ends: 2735 [2020-12-23 10:58:35,678 INFO L226 Difference]: Without dead ends: 2089 [2020-12-23 10:58:35,680 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 10:58:35,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2089 states. [2020-12-23 10:58:35,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2089 to 1311. [2020-12-23 10:58:35,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1311 states. [2020-12-23 10:58:35,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1311 states to 1311 states and 1874 transitions. [2020-12-23 10:58:35,882 INFO L78 Accepts]: Start accepts. Automaton has 1311 states and 1874 transitions. Word has length 60 [2020-12-23 10:58:35,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 10:58:35,883 INFO L481 AbstractCegarLoop]: Abstraction has 1311 states and 1874 transitions. [2020-12-23 10:58:35,883 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 10:58:35,883 INFO L276 IsEmpty]: Start isEmpty. Operand 1311 states and 1874 transitions. [2020-12-23 10:58:35,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-12-23 10:58:35,884 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 10:58:35,884 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 10:58:35,885 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-23 10:58:35,885 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 10:58:35,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 10:58:35,885 INFO L82 PathProgramCache]: Analyzing trace with hash -1524898995, now seen corresponding path program 1 times [2020-12-23 10:58:35,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 10:58:35,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942637945] [2020-12-23 10:58:35,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 10:58:35,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 10:58:36,020 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 10:58:36,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942637945] [2020-12-23 10:58:36,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 10:58:36,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 10:58:36,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31201296] [2020-12-23 10:58:36,022 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 10:58:36,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 10:58:36,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 10:58:36,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 10:58:36,023 INFO L87 Difference]: Start difference. First operand 1311 states and 1874 transitions. Second operand 5 states. [2020-12-23 10:58:36,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 10:58:36,410 INFO L93 Difference]: Finished difference Result 3379 states and 4848 transitions. [2020-12-23 10:58:36,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 10:58:36,411 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 60 [2020-12-23 10:58:36,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 10:58:36,426 INFO L225 Difference]: With dead ends: 3379 [2020-12-23 10:58:36,426 INFO L226 Difference]: Without dead ends: 2733 [2020-12-23 10:58:36,429 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 10:58:36,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2733 states. [2020-12-23 10:58:36,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2733 to 2279. [2020-12-23 10:58:36,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2279 states. [2020-12-23 10:58:36,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2279 states to 2279 states and 3244 transitions. [2020-12-23 10:58:36,714 INFO L78 Accepts]: Start accepts. Automaton has 2279 states and 3244 transitions. Word has length 60 [2020-12-23 10:58:36,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 10:58:36,714 INFO L481 AbstractCegarLoop]: Abstraction has 2279 states and 3244 transitions. [2020-12-23 10:58:36,715 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 10:58:36,715 INFO L276 IsEmpty]: Start isEmpty. Operand 2279 states and 3244 transitions. [2020-12-23 10:58:36,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-12-23 10:58:36,716 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 10:58:36,716 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 10:58:36,717 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-23 10:58:36,717 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 10:58:36,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 10:58:36,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1912167623, now seen corresponding path program 1 times [2020-12-23 10:58:36,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 10:58:36,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154331569] [2020-12-23 10:58:36,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 10:58:36,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 10:58:36,823 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 10:58:36,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154331569] [2020-12-23 10:58:36,824 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 10:58:36,824 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 10:58:36,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966067258] [2020-12-23 10:58:36,825 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 10:58:36,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 10:58:36,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 10:58:36,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 10:58:36,826 INFO L87 Difference]: Start difference. First operand 2279 states and 3244 transitions. Second operand 5 states. [2020-12-23 10:58:37,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 10:58:37,249 INFO L93 Difference]: Finished difference Result 3827 states and 5492 transitions. [2020-12-23 10:58:37,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 10:58:37,249 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 60 [2020-12-23 10:58:37,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 10:58:37,266 INFO L225 Difference]: With dead ends: 3827 [2020-12-23 10:58:37,266 INFO L226 Difference]: Without dead ends: 3377 [2020-12-23 10:58:37,268 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 10:58:37,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3377 states. [2020-12-23 10:58:37,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3377 to 2727. [2020-12-23 10:58:37,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2727 states. [2020-12-23 10:58:37,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2727 states to 2727 states and 3892 transitions. [2020-12-23 10:58:37,621 INFO L78 Accepts]: Start accepts. Automaton has 2727 states and 3892 transitions. Word has length 60 [2020-12-23 10:58:37,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 10:58:37,622 INFO L481 AbstractCegarLoop]: Abstraction has 2727 states and 3892 transitions. [2020-12-23 10:58:37,622 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 10:58:37,622 INFO L276 IsEmpty]: Start isEmpty. Operand 2727 states and 3892 transitions. [2020-12-23 10:58:37,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-23 10:58:37,623 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 10:58:37,624 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 10:58:37,624 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-23 10:58:37,624 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 10:58:37,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 10:58:37,625 INFO L82 PathProgramCache]: Analyzing trace with hash -1791952020, now seen corresponding path program 1 times [2020-12-23 10:58:37,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 10:58:37,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752438957] [2020-12-23 10:58:37,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 10:58:37,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 10:58:37,764 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 10:58:37,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752438957] [2020-12-23 10:58:37,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544712762] [2020-12-23 10:58:37,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 10:58:37,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 10:58:37,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 10:58:37,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 10:58:38,002 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 10:58:38,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 10:58:38,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 6 [2020-12-23 10:58:38,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532355354] [2020-12-23 10:58:38,004 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 10:58:38,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 10:58:38,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 10:58:38,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 10:58:38,005 INFO L87 Difference]: Start difference. First operand 2727 states and 3892 transitions. Second operand 6 states. [2020-12-23 10:58:38,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 10:58:38,789 INFO L93 Difference]: Finished difference Result 6480 states and 9305 transitions. [2020-12-23 10:58:38,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 10:58:38,789 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 61 [2020-12-23 10:58:38,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 10:58:38,812 INFO L225 Difference]: With dead ends: 6480 [2020-12-23 10:58:38,812 INFO L226 Difference]: Without dead ends: 4462 [2020-12-23 10:58:38,817 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 10:58:38,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4462 states. [2020-12-23 10:58:39,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4462 to 4403. [2020-12-23 10:58:39,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4403 states. [2020-12-23 10:58:39,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4403 states to 4403 states and 6206 transitions. [2020-12-23 10:58:39,433 INFO L78 Accepts]: Start accepts. Automaton has 4403 states and 6206 transitions. Word has length 61 [2020-12-23 10:58:39,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 10:58:39,434 INFO L481 AbstractCegarLoop]: Abstraction has 4403 states and 6206 transitions. [2020-12-23 10:58:39,434 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 10:58:39,434 INFO L276 IsEmpty]: Start isEmpty. Operand 4403 states and 6206 transitions. [2020-12-23 10:58:39,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-23 10:58:39,435 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 10:58:39,435 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 10:58:39,651 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-23 10:58:39,652 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 10:58:39,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 10:58:39,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1709414990, now seen corresponding path program 1 times [2020-12-23 10:58:39,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 10:58:39,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929738204] [2020-12-23 10:58:39,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 10:58:39,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 10:58:39,888 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 10:58:39,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929738204] [2020-12-23 10:58:39,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088797366] [2020-12-23 10:58:39,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 10:58:39,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 10:58:39,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-23 10:58:39,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 10:58:40,403 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 10:58:40,673 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 42 [2020-12-23 10:58:41,248 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 10:58:41,249 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 10:58:41,249 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 16] total 23 [2020-12-23 10:58:41,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306242564] [2020-12-23 10:58:41,250 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-23 10:58:41,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 10:58:41,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-23 10:58:41,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2020-12-23 10:58:41,251 INFO L87 Difference]: Start difference. First operand 4403 states and 6206 transitions. Second operand 24 states. [2020-12-23 10:58:41,920 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-12-23 10:58:42,177 WARN L197 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 63 [2020-12-23 10:58:42,501 WARN L197 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-12-23 10:58:42,837 WARN L197 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 91 [2020-12-23 10:58:43,212 WARN L197 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 91 [2020-12-23 10:58:43,938 WARN L197 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 85 [2020-12-23 10:58:44,241 WARN L197 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 85 [2020-12-23 10:58:44,744 WARN L197 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2020-12-23 10:58:45,026 WARN L197 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2020-12-23 10:58:45,824 WARN L197 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 89 [2020-12-23 10:58:46,157 WARN L197 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 89 [2020-12-23 10:58:46,537 WARN L197 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 76 [2020-12-23 10:58:46,838 WARN L197 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 76 [2020-12-23 10:58:47,169 WARN L197 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 70 [2020-12-23 10:58:47,487 WARN L197 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 92 [2020-12-23 10:58:47,801 WARN L197 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 70 [2020-12-23 10:58:48,126 WARN L197 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 92 [2020-12-23 10:58:48,601 WARN L197 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 93 [2020-12-23 10:58:48,903 WARN L197 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 79 [2020-12-23 10:58:49,271 WARN L197 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 93 [2020-12-23 10:58:49,619 WARN L197 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 79 [2020-12-23 10:58:49,786 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 50 [2020-12-23 10:58:50,104 WARN L197 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 64 [2020-12-23 10:58:50,620 WARN L197 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 80 [2020-12-23 10:58:50,996 WARN L197 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 93 [2020-12-23 10:58:51,323 WARN L197 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 80 [2020-12-23 10:58:51,526 WARN L197 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-12-23 10:58:51,786 WARN L197 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2020-12-23 10:58:51,951 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2020-12-23 10:58:52,263 WARN L197 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 66 [2020-12-23 10:58:52,706 WARN L197 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 80 [2020-12-23 10:58:53,044 WARN L197 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 92 [2020-12-23 10:58:53,217 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2020-12-23 10:58:53,476 WARN L197 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 69 [2020-12-23 10:58:53,794 WARN L197 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2020-12-23 10:58:54,135 WARN L197 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 94 [2020-12-23 10:58:54,912 WARN L197 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 89 [2020-12-23 10:58:55,528 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 57 [2020-12-23 10:58:55,841 WARN L197 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2020-12-23 10:58:55,990 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2020-12-23 10:58:56,282 WARN L197 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 60 [2020-12-23 10:58:56,955 WARN L197 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 72 [2020-12-23 10:58:57,216 WARN L197 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 72 [2020-12-23 10:58:57,618 WARN L197 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 83 [2020-12-23 10:58:58,699 WARN L197 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 53 [2020-12-23 10:58:58,897 WARN L197 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 53 [2020-12-23 10:59:00,071 WARN L197 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 87 [2020-12-23 10:59:00,592 WARN L197 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 61 [2020-12-23 10:59:01,182 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2020-12-23 10:59:01,502 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2020-12-23 10:59:01,953 WARN L197 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2020-12-23 10:59:02,346 WARN L197 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 90 [2020-12-23 10:59:02,737 WARN L197 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 56 [2020-12-23 10:59:02,995 WARN L197 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 56 [2020-12-23 10:59:03,469 WARN L197 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 91 [2020-12-23 10:59:04,388 WARN L197 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 89 [2020-12-23 10:59:05,500 WARN L197 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2020-12-23 10:59:05,880 WARN L197 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 83 [2020-12-23 10:59:07,228 WARN L197 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 87 [2020-12-23 10:59:08,060 WARN L197 SmtUtils]: Spent 403.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 90 [2020-12-23 10:59:08,759 WARN L197 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 91 [2020-12-23 10:59:09,381 WARN L197 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 91 [2020-12-23 10:59:12,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 10:59:12,421 INFO L93 Difference]: Finished difference Result 56035 states and 77450 transitions. [2020-12-23 10:59:12,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2020-12-23 10:59:12,422 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 62 [2020-12-23 10:59:12,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 10:59:12,625 INFO L225 Difference]: With dead ends: 56035 [2020-12-23 10:59:12,625 INFO L226 Difference]: Without dead ends: 51653 [2020-12-23 10:59:12,662 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6908 ImplicationChecksByTransitivity, 21.1s TimeCoverageRelationStatistics Valid=3258, Invalid=14832, Unknown=0, NotChecked=0, Total=18090 [2020-12-23 10:59:12,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51653 states. [2020-12-23 10:59:15,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51653 to 9355. [2020-12-23 10:59:15,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9355 states. [2020-12-23 10:59:15,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9355 states to 9355 states and 13032 transitions. [2020-12-23 10:59:15,204 INFO L78 Accepts]: Start accepts. Automaton has 9355 states and 13032 transitions. Word has length 62 [2020-12-23 10:59:15,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 10:59:15,204 INFO L481 AbstractCegarLoop]: Abstraction has 9355 states and 13032 transitions. [2020-12-23 10:59:15,205 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-23 10:59:15,205 INFO L276 IsEmpty]: Start isEmpty. Operand 9355 states and 13032 transitions. [2020-12-23 10:59:15,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-23 10:59:15,206 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 10:59:15,206 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 10:59:15,420 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-23 10:59:15,421 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 10:59:15,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 10:59:15,422 INFO L82 PathProgramCache]: Analyzing trace with hash 653717303, now seen corresponding path program 1 times [2020-12-23 10:59:15,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 10:59:15,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254004273] [2020-12-23 10:59:15,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 10:59:15,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 10:59:15,649 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 10:59:15,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254004273] [2020-12-23 10:59:15,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836747647] [2020-12-23 10:59:15,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 10:59:15,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 10:59:15,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-23 10:59:15,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 10:59:15,926 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 10:59:16,206 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 10:59:16,206 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 10:59:16,206 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-23 10:59:16,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055756977] [2020-12-23 10:59:16,207 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 10:59:16,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 10:59:16,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 10:59:16,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2020-12-23 10:59:16,209 INFO L87 Difference]: Start difference. First operand 9355 states and 13032 transitions. Second operand 17 states. [2020-12-23 10:59:30,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 10:59:30,146 INFO L93 Difference]: Finished difference Result 68149 states and 93592 transitions. [2020-12-23 10:59:30,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-12-23 10:59:30,147 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 62 [2020-12-23 10:59:30,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 10:59:30,292 INFO L225 Difference]: With dead ends: 68149 [2020-12-23 10:59:30,293 INFO L226 Difference]: Without dead ends: 58815 [2020-12-23 10:59:30,320 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 837 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=749, Invalid=2331, Unknown=0, NotChecked=0, Total=3080 [2020-12-23 10:59:30,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58815 states. [2020-12-23 10:59:35,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58815 to 20943. [2020-12-23 10:59:35,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20943 states. [2020-12-23 10:59:35,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20943 states to 20943 states and 28654 transitions. [2020-12-23 10:59:35,823 INFO L78 Accepts]: Start accepts. Automaton has 20943 states and 28654 transitions. Word has length 62 [2020-12-23 10:59:35,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 10:59:35,823 INFO L481 AbstractCegarLoop]: Abstraction has 20943 states and 28654 transitions. [2020-12-23 10:59:35,824 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 10:59:35,824 INFO L276 IsEmpty]: Start isEmpty. Operand 20943 states and 28654 transitions. [2020-12-23 10:59:35,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-23 10:59:35,826 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 10:59:35,826 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 10:59:36,040 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-23 10:59:36,041 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 10:59:36,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 10:59:36,042 INFO L82 PathProgramCache]: Analyzing trace with hash 1807663409, now seen corresponding path program 1 times [2020-12-23 10:59:36,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 10:59:36,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431859700] [2020-12-23 10:59:36,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 10:59:36,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 10:59:36,279 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 10:59:36,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431859700] [2020-12-23 10:59:36,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290946521] [2020-12-23 10:59:36,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 10:59:36,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 10:59:36,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-23 10:59:36,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 10:59:36,599 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 10:59:36,879 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 10:59:36,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 10:59:36,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-23 10:59:36,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82375166] [2020-12-23 10:59:36,881 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 10:59:36,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 10:59:36,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 10:59:36,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2020-12-23 10:59:36,882 INFO L87 Difference]: Start difference. First operand 20943 states and 28654 transitions. Second operand 17 states. [2020-12-23 11:00:01,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 11:00:01,755 INFO L93 Difference]: Finished difference Result 135652 states and 182751 transitions. [2020-12-23 11:00:01,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-23 11:00:01,756 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 62 [2020-12-23 11:00:01,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 11:00:02,252 INFO L225 Difference]: With dead ends: 135652 [2020-12-23 11:00:02,253 INFO L226 Difference]: Without dead ends: 114730 [2020-12-23 11:00:02,377 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 652 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=667, Invalid=1985, Unknown=0, NotChecked=0, Total=2652 [2020-12-23 11:00:02,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114730 states. [2020-12-23 11:00:13,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114730 to 52080. [2020-12-23 11:00:13,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52080 states. [2020-12-23 11:00:13,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52080 states to 52080 states and 70921 transitions. [2020-12-23 11:00:13,471 INFO L78 Accepts]: Start accepts. Automaton has 52080 states and 70921 transitions. Word has length 62 [2020-12-23 11:00:13,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 11:00:13,471 INFO L481 AbstractCegarLoop]: Abstraction has 52080 states and 70921 transitions. [2020-12-23 11:00:13,471 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 11:00:13,471 INFO L276 IsEmpty]: Start isEmpty. Operand 52080 states and 70921 transitions. [2020-12-23 11:00:13,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-23 11:00:13,474 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 11:00:13,475 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 11:00:13,687 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 11:00:13,688 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 11:00:13,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 11:00:13,690 INFO L82 PathProgramCache]: Analyzing trace with hash 1286750416, now seen corresponding path program 1 times [2020-12-23 11:00:13,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 11:00:13,690 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776360685] [2020-12-23 11:00:13,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 11:00:13,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 11:00:13,730 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 11:00:13,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776360685] [2020-12-23 11:00:13,731 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 11:00:13,731 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 11:00:13,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514665855] [2020-12-23 11:00:13,732 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 11:00:13,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 11:00:13,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 11:00:13,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 11:00:13,733 INFO L87 Difference]: Start difference. First operand 52080 states and 70921 transitions. Second operand 3 states. [2020-12-23 11:00:22,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 11:00:22,556 INFO L93 Difference]: Finished difference Result 94910 states and 129570 transitions. [2020-12-23 11:00:22,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 11:00:22,556 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 63 [2020-12-23 11:00:22,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 11:00:22,629 INFO L225 Difference]: With dead ends: 94910 [2020-12-23 11:00:22,629 INFO L226 Difference]: Without dead ends: 42851 [2020-12-23 11:00:22,680 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 [2020-12-23 11:00:22,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42851 states. [2020-12-23 11:00:31,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42851 to 42851. [2020-12-23 11:00:31,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42851 states. [2020-12-23 11:00:31,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42851 states to 42851 states and 57680 transitions. [2020-12-23 11:00:31,121 INFO L78 Accepts]: Start accepts. Automaton has 42851 states and 57680 transitions. Word has length 63 [2020-12-23 11:00:31,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 11:00:31,122 INFO L481 AbstractCegarLoop]: Abstraction has 42851 states and 57680 transitions. [2020-12-23 11:00:31,122 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 11:00:31,122 INFO L276 IsEmpty]: Start isEmpty. Operand 42851 states and 57680 transitions. [2020-12-23 11:00:31,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-23 11:00:31,124 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 11:00:31,125 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 11:00:31,125 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-23 11:00:31,125 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 11:00:31,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 11:00:31,125 INFO L82 PathProgramCache]: Analyzing trace with hash 1825583548, now seen corresponding path program 1 times [2020-12-23 11:00:31,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 11:00:31,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442117795] [2020-12-23 11:00:31,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 11:00:31,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 11:00:31,185 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 11:00:31,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442117795] [2020-12-23 11:00:31,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 11:00:31,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 11:00:31,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47163120] [2020-12-23 11:00:31,187 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 11:00:31,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 11:00:31,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 11:00:31,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 11:00:31,188 INFO L87 Difference]: Start difference. First operand 42851 states and 57680 transitions. Second operand 3 states. [2020-12-23 11:00:36,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 11:00:36,378 INFO L93 Difference]: Finished difference Result 68494 states and 92602 transitions. [2020-12-23 11:00:36,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 11:00:36,379 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 63 [2020-12-23 11:00:36,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 11:00:36,420 INFO L225 Difference]: With dead ends: 68494 [2020-12-23 11:00:36,420 INFO L226 Difference]: Without dead ends: 25664 [2020-12-23 11:00:36,452 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 [2020-12-23 11:00:36,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25664 states. [2020-12-23 11:00:41,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25664 to 24542. [2020-12-23 11:00:41,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24542 states. [2020-12-23 11:00:41,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24542 states to 24542 states and 32973 transitions. [2020-12-23 11:00:41,564 INFO L78 Accepts]: Start accepts. Automaton has 24542 states and 32973 transitions. Word has length 63 [2020-12-23 11:00:41,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 11:00:41,565 INFO L481 AbstractCegarLoop]: Abstraction has 24542 states and 32973 transitions. [2020-12-23 11:00:41,565 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 11:00:41,565 INFO L276 IsEmpty]: Start isEmpty. Operand 24542 states and 32973 transitions. [2020-12-23 11:00:41,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-23 11:00:41,566 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 11:00:41,566 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 11:00:41,566 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-23 11:00:41,566 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 11:00:41,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 11:00:41,567 INFO L82 PathProgramCache]: Analyzing trace with hash 392958652, now seen corresponding path program 1 times [2020-12-23 11:00:41,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 11:00:41,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591809500] [2020-12-23 11:00:41,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 11:00:41,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 11:00:42,443 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 11:00:42,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591809500] [2020-12-23 11:00:42,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203851775] [2020-12-23 11:00:42,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 11:00:42,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 11:00:42,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-23 11:00:42,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 11:00:42,997 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 11:00:43,788 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 11:00:43,788 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 11:00:43,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 13] total 34 [2020-12-23 11:00:43,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897787530] [2020-12-23 11:00:43,789 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-23 11:00:43,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 11:00:43,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-23 11:00:43,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=1040, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 11:00:43,791 INFO L87 Difference]: Start difference. First operand 24542 states and 32973 transitions. Second operand 34 states. [2020-12-23 11:00:44,077 WARN L197 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 81 [2020-12-23 11:00:45,224 WARN L197 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2020-12-23 11:00:45,565 WARN L197 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 70 [2020-12-23 11:00:46,001 WARN L197 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 78 [2020-12-23 11:00:46,465 WARN L197 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 88 [2020-12-23 11:00:47,089 WARN L197 SmtUtils]: Spent 480.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 103 [2020-12-23 11:00:47,730 WARN L197 SmtUtils]: Spent 530.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 111 [2020-12-23 11:00:48,187 WARN L197 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 74 [2020-12-23 11:00:48,478 WARN L197 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 61 [2020-12-23 11:00:48,844 WARN L197 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 74 [2020-12-23 11:00:49,160 WARN L197 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 60 [2020-12-23 11:00:49,477 WARN L197 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 58 [2020-12-23 11:00:49,668 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2020-12-23 11:00:50,040 WARN L197 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2020-12-23 11:00:50,349 WARN L197 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 61 [2020-12-23 11:00:50,627 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2020-12-23 11:00:51,118 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 45 [2020-12-23 11:00:51,444 WARN L197 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2020-12-23 11:00:51,668 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2020-12-23 11:00:53,191 WARN L197 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2020-12-23 11:00:54,215 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 43 [2020-12-23 11:00:55,584 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 39 [2020-12-23 11:00:55,921 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 45 [2020-12-23 11:00:56,290 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2020-12-23 11:00:56,774 WARN L197 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2020-12-23 11:00:57,199 WARN L197 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2020-12-23 11:00:57,650 WARN L197 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 78 [2020-12-23 11:00:57,890 WARN L197 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2020-12-23 11:00:58,115 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 39 [2020-12-23 11:00:58,526 WARN L197 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2020-12-23 11:00:59,951 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 39 [2020-12-23 11:01:00,281 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2020-12-23 11:01:01,690 WARN L197 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2020-12-23 11:01:02,157 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 39 [2020-12-23 11:01:02,425 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2020-12-23 11:01:02,816 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2020-12-23 11:01:06,891 WARN L197 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2020-12-23 11:01:07,415 WARN L197 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2020-12-23 11:01:12,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 11:01:12,137 INFO L93 Difference]: Finished difference Result 56985 states and 76766 transitions. [2020-12-23 11:01:12,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-12-23 11:01:12,138 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 63 [2020-12-23 11:01:12,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 11:01:12,192 INFO L225 Difference]: With dead ends: 56985 [2020-12-23 11:01:12,192 INFO L226 Difference]: Without dead ends: 46917 [2020-12-23 11:01:12,209 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2203 ImplicationChecksByTransitivity, 14.0s TimeCoverageRelationStatistics Valid=1682, Invalid=7630, Unknown=0, NotChecked=0, Total=9312 [2020-12-23 11:01:12,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46917 states. [2020-12-23 11:01:18,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46917 to 24836. [2020-12-23 11:01:18,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24836 states. [2020-12-23 11:01:18,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24836 states to 24836 states and 33414 transitions. [2020-12-23 11:01:18,193 INFO L78 Accepts]: Start accepts. Automaton has 24836 states and 33414 transitions. Word has length 63 [2020-12-23 11:01:18,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 11:01:18,193 INFO L481 AbstractCegarLoop]: Abstraction has 24836 states and 33414 transitions. [2020-12-23 11:01:18,193 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-23 11:01:18,194 INFO L276 IsEmpty]: Start isEmpty. Operand 24836 states and 33414 transitions. [2020-12-23 11:01:18,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-23 11:01:18,195 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 11:01:18,195 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 11:01:18,395 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-23 11:01:18,396 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 11:01:18,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 11:01:18,397 INFO L82 PathProgramCache]: Analyzing trace with hash -196942823, now seen corresponding path program 1 times [2020-12-23 11:01:18,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 11:01:18,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561080386] [2020-12-23 11:01:18,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 11:01:18,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 11:01:18,448 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 11:01:18,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561080386] [2020-12-23 11:01:18,448 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 11:01:18,449 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 11:01:18,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824420021] [2020-12-23 11:01:18,449 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 11:01:18,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 11:01:18,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 11:01:18,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 11:01:18,450 INFO L87 Difference]: Start difference. First operand 24836 states and 33414 transitions. Second operand 3 states. [2020-12-23 11:01:21,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 11:01:21,699 INFO L93 Difference]: Finished difference Result 37014 states and 50040 transitions. [2020-12-23 11:01:21,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 11:01:21,700 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 63 [2020-12-23 11:01:21,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 11:01:21,723 INFO L225 Difference]: With dead ends: 37014 [2020-12-23 11:01:21,723 INFO L226 Difference]: Without dead ends: 14336 [2020-12-23 11:01:21,740 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 [2020-12-23 11:01:21,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14336 states. [2020-12-23 11:01:25,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14336 to 14334. [2020-12-23 11:01:25,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14334 states. [2020-12-23 11:01:25,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14334 states to 14334 states and 18872 transitions. [2020-12-23 11:01:25,273 INFO L78 Accepts]: Start accepts. Automaton has 14334 states and 18872 transitions. Word has length 63 [2020-12-23 11:01:25,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 11:01:25,273 INFO L481 AbstractCegarLoop]: Abstraction has 14334 states and 18872 transitions. [2020-12-23 11:01:25,273 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 11:01:25,273 INFO L276 IsEmpty]: Start isEmpty. Operand 14334 states and 18872 transitions. [2020-12-23 11:01:25,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-23 11:01:25,274 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 11:01:25,275 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 11:01:25,275 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-23 11:01:25,275 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 11:01:25,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 11:01:25,275 INFO L82 PathProgramCache]: Analyzing trace with hash -1628783719, now seen corresponding path program 1 times [2020-12-23 11:01:25,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 11:01:25,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65969750] [2020-12-23 11:01:25,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 11:01:25,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 11:01:26,569 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 11:01:26,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65969750] [2020-12-23 11:01:26,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955220799] [2020-12-23 11:01:26,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 11:01:26,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 11:01:26,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-23 11:01:26,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 11:01:27,950 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 11:01:29,343 WARN L197 SmtUtils]: Spent 965.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 60 [2020-12-23 11:01:29,705 WARN L197 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-12-23 11:01:30,205 WARN L197 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2020-12-23 11:01:30,262 INFO L639 QuantifierPusher]: Distributing 4 conjuncts over 2 disjuncts [2020-12-23 11:01:30,801 WARN L197 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 61 [2020-12-23 11:01:30,913 INFO L639 QuantifierPusher]: Distributing 4 conjuncts over 2 disjuncts [2020-12-23 11:01:31,448 WARN L197 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 61 [2020-12-23 11:01:31,484 INFO L639 QuantifierPusher]: Distributing 4 conjuncts over 2 disjuncts [2020-12-23 11:01:31,499 INFO L639 QuantifierPusher]: Distributing 4 conjuncts over 4 disjuncts [2020-12-23 11:01:31,506 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: variable got div captured [2020-12-23 11:01:31,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 11:01:31,506 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-12-23 11:01:31,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161347549] [2020-12-23 11:01:31,507 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-23 11:01:31,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 11:01:31,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-23 11:01:31,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1347, Unknown=0, NotChecked=0, Total=1482 [2020-12-23 11:01:31,509 INFO L87 Difference]: Start difference. First operand 14334 states and 18872 transitions. Second operand 23 states. [2020-12-23 11:01:32,057 WARN L197 SmtUtils]: Spent 430.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 96 [2020-12-23 11:01:33,011 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2020-12-23 11:01:33,325 WARN L197 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2020-12-23 11:01:33,762 WARN L197 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 68 [2020-12-23 11:01:34,227 WARN L197 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 81 [2020-12-23 11:01:34,819 WARN L197 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 94 [2020-12-23 11:01:35,449 WARN L197 SmtUtils]: Spent 483.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 105 [2020-12-23 11:01:35,814 WARN L197 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2020-12-23 11:01:36,211 WARN L197 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2020-12-23 11:01:36,739 WARN L197 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-12-23 11:01:37,096 WARN L197 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2020-12-23 11:01:37,638 WARN L197 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2020-12-23 11:01:44,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 11:01:44,130 INFO L93 Difference]: Finished difference Result 17028 states and 22377 transitions. [2020-12-23 11:01:44,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-23 11:01:44,132 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 63 [2020-12-23 11:01:44,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 11:01:44,151 INFO L225 Difference]: With dead ends: 17028 [2020-12-23 11:01:44,152 INFO L226 Difference]: Without dead ends: 15642 [2020-12-23 11:01:44,158 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=414, Invalid=3008, Unknown=0, NotChecked=0, Total=3422 [2020-12-23 11:01:44,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15642 states. [2020-12-23 11:01:47,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15642 to 14387. [2020-12-23 11:01:47,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14387 states. [2020-12-23 11:01:47,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14387 states to 14387 states and 18954 transitions. [2020-12-23 11:01:47,545 INFO L78 Accepts]: Start accepts. Automaton has 14387 states and 18954 transitions. Word has length 63 [2020-12-23 11:01:47,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 11:01:47,545 INFO L481 AbstractCegarLoop]: Abstraction has 14387 states and 18954 transitions. [2020-12-23 11:01:47,545 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-23 11:01:47,546 INFO L276 IsEmpty]: Start isEmpty. Operand 14387 states and 18954 transitions. [2020-12-23 11:01:47,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-23 11:01:47,547 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 11:01:47,547 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 11:01:47,747 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 11:01:47,748 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 11:01:47,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 11:01:47,749 INFO L82 PathProgramCache]: Analyzing trace with hash -145976969, now seen corresponding path program 1 times [2020-12-23 11:01:47,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 11:01:47,750 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640931278] [2020-12-23 11:01:47,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 11:01:47,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 11:01:47,786 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-23 11:01:47,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640931278] [2020-12-23 11:01:47,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 11:01:47,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 11:01:47,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735823064] [2020-12-23 11:01:47,787 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 11:01:47,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 11:01:47,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 11:01:47,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 11:01:47,788 INFO L87 Difference]: Start difference. First operand 14387 states and 18954 transitions. Second operand 3 states. [2020-12-23 11:01:50,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 11:01:50,199 INFO L93 Difference]: Finished difference Result 23539 states and 31091 transitions. [2020-12-23 11:01:50,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 11:01:50,202 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 63 [2020-12-23 11:01:50,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 11:01:50,216 INFO L225 Difference]: With dead ends: 23539 [2020-12-23 11:01:50,216 INFO L226 Difference]: Without dead ends: 9241 [2020-12-23 11:01:50,227 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 [2020-12-23 11:01:50,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9241 states. [2020-12-23 11:01:52,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9241 to 9241. [2020-12-23 11:01:52,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9241 states. [2020-12-23 11:01:52,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9241 states to 9241 states and 12074 transitions. [2020-12-23 11:01:52,481 INFO L78 Accepts]: Start accepts. Automaton has 9241 states and 12074 transitions. Word has length 63 [2020-12-23 11:01:52,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 11:01:52,482 INFO L481 AbstractCegarLoop]: Abstraction has 9241 states and 12074 transitions. [2020-12-23 11:01:52,482 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 11:01:52,482 INFO L276 IsEmpty]: Start isEmpty. Operand 9241 states and 12074 transitions. [2020-12-23 11:01:52,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-23 11:01:52,483 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 11:01:52,483 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 11:01:52,483 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-23 11:01:52,483 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 11:01:52,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 11:01:52,484 INFO L82 PathProgramCache]: Analyzing trace with hash 1441254617, now seen corresponding path program 1 times [2020-12-23 11:01:52,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 11:01:52,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770870908] [2020-12-23 11:01:52,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 11:01:52,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 11:01:54,064 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 11:01:54,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770870908] [2020-12-23 11:01:54,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221600219] [2020-12-23 11:01:54,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 11:01:54,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 11:01:54,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-23 11:01:54,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 11:01:55,162 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 11:01:55,654 WARN L197 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 26 [2020-12-23 11:01:56,555 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 11:01:56,555 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 11:01:56,555 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 13] total 33 [2020-12-23 11:01:56,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297850927] [2020-12-23 11:01:56,556 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-23 11:01:56,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 11:01:56,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-23 11:01:56,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=974, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 11:01:56,558 INFO L87 Difference]: Start difference. First operand 9241 states and 12074 transitions. Second operand 33 states. [2020-12-23 11:01:57,082 WARN L197 SmtUtils]: Spent 401.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 66 [2020-12-23 11:01:58,277 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 21 [2020-12-23 11:01:58,626 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 23 [2020-12-23 11:01:59,021 WARN L197 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 31 [2020-12-23 11:01:59,414 WARN L197 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 43 [2020-12-23 11:02:00,002 WARN L197 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2020-12-23 11:02:00,957 WARN L197 SmtUtils]: Spent 816.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 79 [2020-12-23 11:02:02,123 WARN L197 SmtUtils]: Spent 949.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 89 [2020-12-23 11:02:03,423 WARN L197 SmtUtils]: Spent 1.13 s on a formula simplification. DAG size of input: 121 DAG size of output: 95 [2020-12-23 11:02:04,096 WARN L197 SmtUtils]: Spent 449.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 64 [2020-12-23 11:02:04,601 WARN L197 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2020-12-23 11:02:05,431 WARN L197 SmtUtils]: Spent 467.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 64 [2020-12-23 11:02:06,135 WARN L197 SmtUtils]: Spent 490.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 60 [2020-12-23 11:02:06,861 WARN L197 SmtUtils]: Spent 417.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 58 [2020-12-23 11:02:07,285 WARN L197 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 49 [2020-12-23 11:02:07,873 WARN L197 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 56 [2020-12-23 11:02:08,705 WARN L197 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 23 [2020-12-23 11:02:09,154 WARN L197 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2020-12-23 11:02:10,065 WARN L197 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2020-12-23 11:02:10,425 WARN L197 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 49 [2020-12-23 11:02:11,029 WARN L197 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2020-12-23 11:02:11,740 WARN L197 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2020-12-23 11:02:12,224 WARN L197 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2020-12-23 11:02:12,659 WARN L197 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 41 [2020-12-23 11:02:13,025 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2020-12-23 11:02:13,469 WARN L197 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2020-12-23 11:02:13,972 WARN L197 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 43 [2020-12-23 11:02:14,823 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 17 [2020-12-23 11:02:15,215 WARN L197 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2020-12-23 11:02:15,722 WARN L197 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 36 [2020-12-23 11:02:16,212 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 22 [2020-12-23 11:02:16,588 WARN L197 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 28 [2020-12-23 11:02:16,967 WARN L197 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2020-12-23 11:02:17,461 WARN L197 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 40 [2020-12-23 11:02:19,121 WARN L197 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 50 [2020-12-23 11:02:19,821 WARN L197 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 59 [2020-12-23 11:02:20,134 WARN L197 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2020-12-23 11:02:20,626 WARN L197 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2020-12-23 11:02:21,398 WARN L197 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 38 [2020-12-23 11:02:22,063 WARN L197 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2020-12-23 11:02:22,733 WARN L197 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 54 [2020-12-23 11:02:24,243 WARN L197 SmtUtils]: Spent 472.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2020-12-23 11:02:24,635 WARN L197 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 41 [2020-12-23 11:02:25,458 WARN L197 SmtUtils]: Spent 611.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 66 [2020-12-23 11:02:26,180 WARN L197 SmtUtils]: Spent 521.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 58 [2020-12-23 11:02:26,779 WARN L197 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-12-23 11:02:28,318 WARN L197 SmtUtils]: Spent 1.27 s on a formula simplification. DAG size of input: 108 DAG size of output: 87 [2020-12-23 11:02:28,830 WARN L197 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 43 [2020-12-23 11:02:30,001 WARN L197 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2020-12-23 11:02:30,750 WARN L197 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2020-12-23 11:02:31,465 WARN L197 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 41 [2020-12-23 11:02:32,087 WARN L197 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2020-12-23 11:02:32,573 WARN L197 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 43 [2020-12-23 11:02:33,044 WARN L197 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2020-12-23 11:02:35,196 WARN L197 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36