/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-var-start-time.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 10:42:17,977 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 10:42:17,980 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 10:42:18,032 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 10:42:18,033 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 10:42:18,037 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 10:42:18,041 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 10:42:18,046 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 10:42:18,049 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 10:42:18,054 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 10:42:18,058 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 10:42:18,060 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 10:42:18,060 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 10:42:18,063 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 10:42:18,065 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 10:42:18,066 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 10:42:18,067 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 10:42:18,071 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 10:42:18,077 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 10:42:18,086 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 10:42:18,087 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 10:42:18,090 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 10:42:18,092 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 10:42:18,094 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 10:42:18,102 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-23 10:42:18,103 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-23 10:42:18,103 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-23 10:42:18,104 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-23 10:42:18,104 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-23 10:42:18,107 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-23 10:42:18,107 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 10:42:18,108 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 10:42:18,110 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 10:42:18,110 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 10:42:18,111 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 10:42:18,112 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 10:42:18,126 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 10:42:18,130 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 10:42:18,130 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 10:42:18,131 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 10:42:18,132 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 10:42:18,138 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 10:42:18,188 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 10:42:18,188 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 10:42:18,190 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 10:42:18,190 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 10:42:18,190 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 10:42:18,191 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 10:42:18,191 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 10:42:18,191 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 10:42:18,191 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 10:42:18,191 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 10:42:18,192 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 10:42:18,192 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 10:42:18,193 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 10:42:18,193 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 10:42:18,194 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 10:42:18,194 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 10:42:18,194 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 10:42:18,194 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 10:42:18,194 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 10:42:18,195 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 10:42:18,195 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 10:42:18,195 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 10:42:18,195 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 10:42:18,195 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 10:42:18,195 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 10:42:18,196 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 10:42:18,556 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 10:42:18,586 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 10:42:18,589 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 10:42:18,591 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 10:42:18,592 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 10:42:18,592 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-12-23 10:42:18,683 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/1eee57eea/7604683e35e3437c858ccc8f4e5661c8/FLAGf5d5665c7 [2020-12-23 10:42:19,274 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 10:42:19,275 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-12-23 10:42:19,293 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/1eee57eea/7604683e35e3437c858ccc8f4e5661c8/FLAGf5d5665c7 [2020-12-23 10:42:19,638 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/1eee57eea/7604683e35e3437c858ccc8f4e5661c8 [2020-12-23 10:42:19,643 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 10:42:19,645 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 10:42:19,649 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 10:42:19,649 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 10:42:19,654 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 10:42:19,655 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 10:42:19" (1/1) ... [2020-12-23 10:42:19,657 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c04e863 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 10:42:19, skipping insertion in model container [2020-12-23 10:42:19,657 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 10:42:19" (1/1) ... [2020-12-23 10:42:19,665 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 10:42:19,729 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[~alive1~0,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[~alive2~0,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[~alive3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~init__tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~__return_6321~0,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_6426~0,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 10:42:19,974 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-var-start-time.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c[3967,3980] 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[~st3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send3~0,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[~node3____CPAchecker_TMP_1~0,] left hand side expression in assignment: lhs: VariableLHS[~p3_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~node3____CPAchecker_TMP_1~0,] 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[~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[~node2____CPAchecker_TMP_1~0,] left hand side expression in assignment: lhs: VariableLHS[~p2_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~node2____CPAchecker_TMP_1~0,] 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[~node1____CPAchecker_TMP_1~0,] left hand side expression in assignment: lhs: VariableLHS[~p1_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~node1____CPAchecker_TMP_1~0,] left hand side expression in assignment: lhs: VariableLHS[~__return_6491~0,GLOBAL] [2020-12-23 10:42:20,010 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 10:42:20,032 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[~alive1~0,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[~alive2~0,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[~alive3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~init__tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~__return_6321~0,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_6426~0,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 10:42:20,114 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-var-start-time.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c[3967,3980] 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[~st3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send3~0,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[~node3____CPAchecker_TMP_1~0,] left hand side expression in assignment: lhs: VariableLHS[~p3_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~node3____CPAchecker_TMP_1~0,] 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[~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[~node2____CPAchecker_TMP_1~0,] left hand side expression in assignment: lhs: VariableLHS[~p2_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~node2____CPAchecker_TMP_1~0,] 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[~node1____CPAchecker_TMP_1~0,] left hand side expression in assignment: lhs: VariableLHS[~p1_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~node1____CPAchecker_TMP_1~0,] left hand side expression in assignment: lhs: VariableLHS[~__return_6491~0,GLOBAL] [2020-12-23 10:42:20,158 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 10:42:20,192 INFO L208 MainTranslator]: Completed translation [2020-12-23 10:42:20,193 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 10:42:20 WrapperNode [2020-12-23 10:42:20,193 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 10:42:20,194 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 10:42:20,195 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 10:42:20,195 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 10:42:20,204 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 10:42:20" (1/1) ... [2020-12-23 10:42:20,234 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 10:42:20" (1/1) ... [2020-12-23 10:42:20,294 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 10:42:20,295 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 10:42:20,296 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 10:42:20,296 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 10:42:20,308 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 10:42:20" (1/1) ... [2020-12-23 10:42:20,308 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 10:42:20" (1/1) ... [2020-12-23 10:42:20,320 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 10:42:20" (1/1) ... [2020-12-23 10:42:20,320 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 10:42:20" (1/1) ... [2020-12-23 10:42:20,327 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 10:42:20" (1/1) ... [2020-12-23 10:42:20,331 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 10:42:20" (1/1) ... [2020-12-23 10:42:20,334 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 10:42:20" (1/1) ... [2020-12-23 10:42:20,338 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 10:42:20,339 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 10:42:20,339 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 10:42:20,339 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 10:42:20,340 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 10:42:20" (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 10:42:20,438 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 10:42:20,438 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 10:42:20,438 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 10:42:20,439 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 10:42:21,028 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 10:42:21,029 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-23 10:42:21,030 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 10:42:21 BoogieIcfgContainer [2020-12-23 10:42:21,030 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 10:42:21,032 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 10:42:21,033 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 10:42:21,036 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 10:42:21,036 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 10:42:19" (1/3) ... [2020-12-23 10:42:21,037 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5abbbe9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 10:42:21, skipping insertion in model container [2020-12-23 10:42:21,037 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 10:42:20" (2/3) ... [2020-12-23 10:42:21,038 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5abbbe9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 10:42:21, skipping insertion in model container [2020-12-23 10:42:21,038 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 10:42:21" (3/3) ... [2020-12-23 10:42:21,039 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-12-23 10:42:21,046 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 10:42:21,051 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 10:42:21,069 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 10:42:21,095 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 10:42:21,096 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 10:42:21,096 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 10:42:21,096 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 10:42:21,096 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 10:42:21,096 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 10:42:21,096 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 10:42:21,096 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 10:42:21,111 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states. [2020-12-23 10:42:21,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-23 10:42:21,119 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 10:42:21,120 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 10:42:21,120 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 10:42:21,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 10:42:21,126 INFO L82 PathProgramCache]: Analyzing trace with hash 1258202004, now seen corresponding path program 1 times [2020-12-23 10:42:21,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 10:42:21,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614841981] [2020-12-23 10:42:21,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 10:42:21,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 10:42:21,429 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 10:42:21,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614841981] [2020-12-23 10:42:21,431 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 10:42:21,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 10:42:21,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774832384] [2020-12-23 10:42:21,437 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 10:42:21,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 10:42:21,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 10:42:21,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 10:42:21,457 INFO L87 Difference]: Start difference. First operand 85 states. Second operand 3 states. [2020-12-23 10:42:21,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 10:42:21,529 INFO L93 Difference]: Finished difference Result 199 states and 318 transitions. [2020-12-23 10:42:21,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 10:42:21,532 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 37 [2020-12-23 10:42:21,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 10:42:21,545 INFO L225 Difference]: With dead ends: 199 [2020-12-23 10:42:21,545 INFO L226 Difference]: Without dead ends: 128 [2020-12-23 10:42:21,548 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 10:42:21,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-12-23 10:42:21,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 126. [2020-12-23 10:42:21,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-12-23 10:42:21,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 188 transitions. [2020-12-23 10:42:21,602 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 188 transitions. Word has length 37 [2020-12-23 10:42:21,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 10:42:21,603 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 188 transitions. [2020-12-23 10:42:21,603 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 10:42:21,603 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 188 transitions. [2020-12-23 10:42:21,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-23 10:42:21,605 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 10:42:21,606 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 10:42:21,606 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 10:42:21,606 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 10:42:21,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 10:42:21,607 INFO L82 PathProgramCache]: Analyzing trace with hash 2004783502, now seen corresponding path program 1 times [2020-12-23 10:42:21,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 10:42:21,608 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593530064] [2020-12-23 10:42:21,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 10:42:21,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 10:42:21,745 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 10:42:21,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593530064] [2020-12-23 10:42:21,745 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 10:42:21,746 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 10:42:21,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450168334] [2020-12-23 10:42:21,749 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 10:42:21,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 10:42:21,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 10:42:21,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 10:42:21,751 INFO L87 Difference]: Start difference. First operand 126 states and 188 transitions. Second operand 3 states. [2020-12-23 10:42:21,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 10:42:21,851 INFO L93 Difference]: Finished difference Result 306 states and 472 transitions. [2020-12-23 10:42:21,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 10:42:21,852 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 38 [2020-12-23 10:42:21,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 10:42:21,857 INFO L225 Difference]: With dead ends: 306 [2020-12-23 10:42:21,858 INFO L226 Difference]: Without dead ends: 200 [2020-12-23 10:42:21,861 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 10:42:21,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-12-23 10:42:21,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 198. [2020-12-23 10:42:21,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-12-23 10:42:21,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 301 transitions. [2020-12-23 10:42:21,929 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 301 transitions. Word has length 38 [2020-12-23 10:42:21,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 10:42:21,929 INFO L481 AbstractCegarLoop]: Abstraction has 198 states and 301 transitions. [2020-12-23 10:42:21,930 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 10:42:21,930 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 301 transitions. [2020-12-23 10:42:21,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-23 10:42:21,933 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 10:42:21,934 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 10:42:21,934 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 10:42:21,934 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 10:42:21,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 10:42:21,935 INFO L82 PathProgramCache]: Analyzing trace with hash 337157617, now seen corresponding path program 1 times [2020-12-23 10:42:21,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 10:42:21,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476151221] [2020-12-23 10:42:21,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 10:42:21,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 10:42:22,057 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 10:42:22,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476151221] [2020-12-23 10:42:22,058 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 10:42:22,058 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 10:42:22,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994581947] [2020-12-23 10:42:22,059 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 10:42:22,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 10:42:22,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 10:42:22,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 10:42:22,061 INFO L87 Difference]: Start difference. First operand 198 states and 301 transitions. Second operand 3 states. [2020-12-23 10:42:22,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 10:42:22,160 INFO L93 Difference]: Finished difference Result 490 states and 759 transitions. [2020-12-23 10:42:22,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 10:42:22,161 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 39 [2020-12-23 10:42:22,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 10:42:22,165 INFO L225 Difference]: With dead ends: 490 [2020-12-23 10:42:22,165 INFO L226 Difference]: Without dead ends: 312 [2020-12-23 10:42:22,167 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 10:42:22,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2020-12-23 10:42:22,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 310. [2020-12-23 10:42:22,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 310 states. [2020-12-23 10:42:22,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 473 transitions. [2020-12-23 10:42:22,209 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 473 transitions. Word has length 39 [2020-12-23 10:42:22,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 10:42:22,209 INFO L481 AbstractCegarLoop]: Abstraction has 310 states and 473 transitions. [2020-12-23 10:42:22,210 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 10:42:22,210 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 473 transitions. [2020-12-23 10:42:22,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-23 10:42:22,211 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 10:42:22,211 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] [2020-12-23 10:42:22,212 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-23 10:42:22,212 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 10:42:22,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 10:42:22,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1621587317, now seen corresponding path program 1 times [2020-12-23 10:42:22,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 10:42:22,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83056634] [2020-12-23 10:42:22,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 10:42:22,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 10:42:22,355 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 10:42:22,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83056634] [2020-12-23 10:42:22,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 10:42:22,356 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 10:42:22,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779567549] [2020-12-23 10:42:22,357 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 10:42:22,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 10:42:22,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 10:42:22,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 10:42:22,359 INFO L87 Difference]: Start difference. First operand 310 states and 473 transitions. Second operand 5 states. [2020-12-23 10:42:22,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 10:42:22,485 INFO L93 Difference]: Finished difference Result 1048 states and 1616 transitions. [2020-12-23 10:42:22,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 10:42:22,486 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 40 [2020-12-23 10:42:22,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 10:42:22,491 INFO L225 Difference]: With dead ends: 1048 [2020-12-23 10:42:22,492 INFO L226 Difference]: Without dead ends: 758 [2020-12-23 10:42:22,494 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 10:42:22,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 758 states. [2020-12-23 10:42:22,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 758 to 754. [2020-12-23 10:42:22,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 754 states. [2020-12-23 10:42:22,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 1153 transitions. [2020-12-23 10:42:22,564 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 1153 transitions. Word has length 40 [2020-12-23 10:42:22,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 10:42:22,565 INFO L481 AbstractCegarLoop]: Abstraction has 754 states and 1153 transitions. [2020-12-23 10:42:22,565 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 10:42:22,565 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 1153 transitions. [2020-12-23 10:42:22,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-23 10:42:22,567 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 10:42:22,567 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 10:42:22,567 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-23 10:42:22,567 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 10:42:22,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 10:42:22,568 INFO L82 PathProgramCache]: Analyzing trace with hash 696518910, now seen corresponding path program 1 times [2020-12-23 10:42:22,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 10:42:22,569 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555475183] [2020-12-23 10:42:22,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 10:42:22,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 10:42:22,735 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 10:42:22,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555475183] [2020-12-23 10:42:22,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 10:42:22,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 10:42:22,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592980167] [2020-12-23 10:42:22,736 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 10:42:22,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 10:42:22,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 10:42:22,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-23 10:42:22,744 INFO L87 Difference]: Start difference. First operand 754 states and 1153 transitions. Second operand 6 states. [2020-12-23 10:42:23,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 10:42:23,123 INFO L93 Difference]: Finished difference Result 2900 states and 4456 transitions. [2020-12-23 10:42:23,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 10:42:23,124 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 42 [2020-12-23 10:42:23,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 10:42:23,137 INFO L225 Difference]: With dead ends: 2900 [2020-12-23 10:42:23,137 INFO L226 Difference]: Without dead ends: 2166 [2020-12-23 10:42:23,139 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-12-23 10:42:23,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2166 states. [2020-12-23 10:42:23,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2166 to 2162. [2020-12-23 10:42:23,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2162 states. [2020-12-23 10:42:23,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2162 states to 2162 states and 3305 transitions. [2020-12-23 10:42:23,308 INFO L78 Accepts]: Start accepts. Automaton has 2162 states and 3305 transitions. Word has length 42 [2020-12-23 10:42:23,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 10:42:23,309 INFO L481 AbstractCegarLoop]: Abstraction has 2162 states and 3305 transitions. [2020-12-23 10:42:23,309 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 10:42:23,309 INFO L276 IsEmpty]: Start isEmpty. Operand 2162 states and 3305 transitions. [2020-12-23 10:42:23,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-23 10:42:23,311 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 10:42:23,311 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 10:42:23,311 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-23 10:42:23,311 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 10:42:23,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 10:42:23,312 INFO L82 PathProgramCache]: Analyzing trace with hash 1026070499, now seen corresponding path program 1 times [2020-12-23 10:42:23,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 10:42:23,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422257838] [2020-12-23 10:42:23,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 10:42:23,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 10:42:23,394 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 10:42:23,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422257838] [2020-12-23 10:42:23,395 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 10:42:23,395 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 10:42:23,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391187421] [2020-12-23 10:42:23,396 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 10:42:23,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 10:42:23,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 10:42:23,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 10:42:23,397 INFO L87 Difference]: Start difference. First operand 2162 states and 3305 transitions. Second operand 5 states. [2020-12-23 10:42:23,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 10:42:23,928 INFO L93 Difference]: Finished difference Result 8726 states and 13357 transitions. [2020-12-23 10:42:23,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 10:42:23,929 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 42 [2020-12-23 10:42:23,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 10:42:23,961 INFO L225 Difference]: With dead ends: 8726 [2020-12-23 10:42:23,961 INFO L226 Difference]: Without dead ends: 6584 [2020-12-23 10:42:23,968 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-23 10:42:23,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6584 states. [2020-12-23 10:42:24,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6584 to 4302. [2020-12-23 10:42:24,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4302 states. [2020-12-23 10:42:24,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4302 states to 4302 states and 6445 transitions. [2020-12-23 10:42:24,402 INFO L78 Accepts]: Start accepts. Automaton has 4302 states and 6445 transitions. Word has length 42 [2020-12-23 10:42:24,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 10:42:24,404 INFO L481 AbstractCegarLoop]: Abstraction has 4302 states and 6445 transitions. [2020-12-23 10:42:24,404 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 10:42:24,405 INFO L276 IsEmpty]: Start isEmpty. Operand 4302 states and 6445 transitions. [2020-12-23 10:42:24,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-23 10:42:24,411 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 10:42:24,411 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 10:42:24,411 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-23 10:42:24,412 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 10:42:24,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 10:42:24,416 INFO L82 PathProgramCache]: Analyzing trace with hash 1723958080, now seen corresponding path program 1 times [2020-12-23 10:42:24,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 10:42:24,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159954334] [2020-12-23 10:42:24,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 10:42:24,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 10:42:24,553 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 10:42:24,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159954334] [2020-12-23 10:42:24,554 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 10:42:24,554 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 10:42:24,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917319237] [2020-12-23 10:42:24,555 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 10:42:24,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 10:42:24,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 10:42:24,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-23 10:42:24,556 INFO L87 Difference]: Start difference. First operand 4302 states and 6445 transitions. Second operand 5 states. [2020-12-23 10:42:25,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 10:42:25,313 INFO L93 Difference]: Finished difference Result 8872 states and 13158 transitions. [2020-12-23 10:42:25,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 10:42:25,314 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 43 [2020-12-23 10:42:25,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 10:42:25,356 INFO L225 Difference]: With dead ends: 8872 [2020-12-23 10:42:25,356 INFO L226 Difference]: Without dead ends: 8870 [2020-12-23 10:42:25,361 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 10:42:25,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8870 states. [2020-12-23 10:42:25,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8870 to 4590. [2020-12-23 10:42:25,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4590 states. [2020-12-23 10:42:25,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4590 states to 4590 states and 6733 transitions. [2020-12-23 10:42:25,863 INFO L78 Accepts]: Start accepts. Automaton has 4590 states and 6733 transitions. Word has length 43 [2020-12-23 10:42:25,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 10:42:25,864 INFO L481 AbstractCegarLoop]: Abstraction has 4590 states and 6733 transitions. [2020-12-23 10:42:25,864 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 10:42:25,864 INFO L276 IsEmpty]: Start isEmpty. Operand 4590 states and 6733 transitions. [2020-12-23 10:42:25,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-23 10:42:25,865 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 10:42:25,866 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 10:42:25,866 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-23 10:42:25,866 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 10:42:25,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 10:42:25,867 INFO L82 PathProgramCache]: Analyzing trace with hash 1913665939, now seen corresponding path program 1 times [2020-12-23 10:42:25,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 10:42:25,867 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402675691] [2020-12-23 10:42:25,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 10:42:25,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 10:42:25,956 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 10:42:25,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402675691] [2020-12-23 10:42:25,957 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 10:42:25,957 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 10:42:25,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727885511] [2020-12-23 10:42:25,958 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 10:42:25,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 10:42:25,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 10:42:25,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 10:42:25,959 INFO L87 Difference]: Start difference. First operand 4590 states and 6733 transitions. Second operand 3 states. [2020-12-23 10:42:26,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 10:42:26,560 INFO L93 Difference]: Finished difference Result 11122 states and 16319 transitions. [2020-12-23 10:42:26,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 10:42:26,560 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 44 [2020-12-23 10:42:26,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 10:42:26,615 INFO L225 Difference]: With dead ends: 11122 [2020-12-23 10:42:26,615 INFO L226 Difference]: Without dead ends: 6552 [2020-12-23 10:42:26,624 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 10:42:26,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6552 states. [2020-12-23 10:42:27,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6552 to 6550. [2020-12-23 10:42:27,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6550 states. [2020-12-23 10:42:27,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6550 states to 6550 states and 9545 transitions. [2020-12-23 10:42:27,206 INFO L78 Accepts]: Start accepts. Automaton has 6550 states and 9545 transitions. Word has length 44 [2020-12-23 10:42:27,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 10:42:27,208 INFO L481 AbstractCegarLoop]: Abstraction has 6550 states and 9545 transitions. [2020-12-23 10:42:27,208 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 10:42:27,209 INFO L276 IsEmpty]: Start isEmpty. Operand 6550 states and 9545 transitions. [2020-12-23 10:42:27,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-23 10:42:27,213 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 10:42:27,213 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 10:42:27,213 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-23 10:42:27,213 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 10:42:27,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 10:42:27,214 INFO L82 PathProgramCache]: Analyzing trace with hash 1827424966, now seen corresponding path program 1 times [2020-12-23 10:42:27,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 10:42:27,216 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393890606] [2020-12-23 10:42:27,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 10:42:27,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 10:42:27,349 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 10:42:27,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393890606] [2020-12-23 10:42:27,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606644972] [2020-12-23 10:42:27,350 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 10:42:27,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 10:42:27,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 10:42:27,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 10:42:27,622 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 10:42:27,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 10:42:27,623 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 6 [2020-12-23 10:42:27,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406409657] [2020-12-23 10:42:27,624 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 10:42:27,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 10:42:27,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 10:42:27,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 10:42:27,625 INFO L87 Difference]: Start difference. First operand 6550 states and 9545 transitions. Second operand 6 states. [2020-12-23 10:42:28,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 10:42:28,959 INFO L93 Difference]: Finished difference Result 16122 states and 23573 transitions. [2020-12-23 10:42:28,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 10:42:28,959 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 61 [2020-12-23 10:42:28,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 10:42:28,986 INFO L225 Difference]: With dead ends: 16122 [2020-12-23 10:42:28,986 INFO L226 Difference]: Without dead ends: 11552 [2020-12-23 10:42:28,996 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 10:42:29,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11552 states. [2020-12-23 10:42:30,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11552 to 10782. [2020-12-23 10:42:30,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10782 states. [2020-12-23 10:42:30,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10782 states to 10782 states and 15585 transitions. [2020-12-23 10:42:30,185 INFO L78 Accepts]: Start accepts. Automaton has 10782 states and 15585 transitions. Word has length 61 [2020-12-23 10:42:30,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 10:42:30,186 INFO L481 AbstractCegarLoop]: Abstraction has 10782 states and 15585 transitions. [2020-12-23 10:42:30,186 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 10:42:30,186 INFO L276 IsEmpty]: Start isEmpty. Operand 10782 states and 15585 transitions. [2020-12-23 10:42:30,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-23 10:42:30,188 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 10:42:30,189 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 10:42:30,404 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-23 10:42:30,405 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 10:42:30,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 10:42:30,407 INFO L82 PathProgramCache]: Analyzing trace with hash 1546173761, now seen corresponding path program 1 times [2020-12-23 10:42:30,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 10:42:30,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799080198] [2020-12-23 10:42:30,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 10:42:30,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 10:42:30,455 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 10:42:30,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799080198] [2020-12-23 10:42:30,456 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 10:42:30,456 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 10:42:30,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29096306] [2020-12-23 10:42:30,457 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 10:42:30,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 10:42:30,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 10:42:30,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 10:42:30,458 INFO L87 Difference]: Start difference. First operand 10782 states and 15585 transitions. Second operand 3 states. [2020-12-23 10:42:31,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 10:42:31,440 INFO L93 Difference]: Finished difference Result 24970 states and 35947 transitions. [2020-12-23 10:42:31,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 10:42:31,440 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 62 [2020-12-23 10:42:31,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 10:42:31,482 INFO L225 Difference]: With dead ends: 24970 [2020-12-23 10:42:31,482 INFO L226 Difference]: Without dead ends: 17132 [2020-12-23 10:42:31,497 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 10:42:31,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17132 states. [2020-12-23 10:42:32,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17132 to 17130. [2020-12-23 10:42:32,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17130 states. [2020-12-23 10:42:32,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17130 states to 17130 states and 24325 transitions. [2020-12-23 10:42:32,745 INFO L78 Accepts]: Start accepts. Automaton has 17130 states and 24325 transitions. Word has length 62 [2020-12-23 10:42:32,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 10:42:32,745 INFO L481 AbstractCegarLoop]: Abstraction has 17130 states and 24325 transitions. [2020-12-23 10:42:32,746 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 10:42:32,746 INFO L276 IsEmpty]: Start isEmpty. Operand 17130 states and 24325 transitions. [2020-12-23 10:42:32,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-23 10:42:32,750 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 10:42:32,750 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 10:42:32,750 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-23 10:42:32,751 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 10:42:32,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 10:42:32,751 INFO L82 PathProgramCache]: Analyzing trace with hash -1797284354, now seen corresponding path program 1 times [2020-12-23 10:42:32,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 10:42:32,752 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10277069] [2020-12-23 10:42:32,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 10:42:32,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 10:42:32,822 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 10:42:32,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10277069] [2020-12-23 10:42:32,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 10:42:32,823 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 10:42:32,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233707077] [2020-12-23 10:42:32,824 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 10:42:32,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 10:42:32,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 10:42:32,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 10:42:32,825 INFO L87 Difference]: Start difference. First operand 17130 states and 24325 transitions. Second operand 5 states. [2020-12-23 10:42:34,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 10:42:34,397 INFO L93 Difference]: Finished difference Result 32844 states and 46959 transitions. [2020-12-23 10:42:34,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 10:42:34,397 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 62 [2020-12-23 10:42:34,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 10:42:34,467 INFO L225 Difference]: With dead ends: 32844 [2020-12-23 10:42:34,467 INFO L226 Difference]: Without dead ends: 25606 [2020-12-23 10:42:34,484 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-23 10:42:34,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25606 states. [2020-12-23 10:42:36,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25606 to 23004. [2020-12-23 10:42:36,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23004 states. [2020-12-23 10:42:36,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23004 states to 23004 states and 32543 transitions. [2020-12-23 10:42:36,410 INFO L78 Accepts]: Start accepts. Automaton has 23004 states and 32543 transitions. Word has length 62 [2020-12-23 10:42:36,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 10:42:36,411 INFO L481 AbstractCegarLoop]: Abstraction has 23004 states and 32543 transitions. [2020-12-23 10:42:36,411 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 10:42:36,411 INFO L276 IsEmpty]: Start isEmpty. Operand 23004 states and 32543 transitions. [2020-12-23 10:42:36,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-23 10:42:36,415 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 10:42:36,415 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 10:42:36,415 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-23 10:42:36,415 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 10:42:36,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 10:42:36,416 INFO L82 PathProgramCache]: Analyzing trace with hash 621000165, now seen corresponding path program 1 times [2020-12-23 10:42:36,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 10:42:36,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970279663] [2020-12-23 10:42:36,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 10:42:36,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 10:42:36,475 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 10:42:36,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970279663] [2020-12-23 10:42:36,476 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 10:42:36,476 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 10:42:36,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657205994] [2020-12-23 10:42:36,477 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 10:42:36,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 10:42:36,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 10:42:36,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 10:42:36,478 INFO L87 Difference]: Start difference. First operand 23004 states and 32543 transitions. Second operand 3 states. [2020-12-23 10:42:38,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 10:42:38,118 INFO L93 Difference]: Finished difference Result 38238 states and 53807 transitions. [2020-12-23 10:42:38,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 10:42:38,119 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 62 [2020-12-23 10:42:38,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 10:42:38,160 INFO L225 Difference]: With dead ends: 38238 [2020-12-23 10:42:38,160 INFO L226 Difference]: Without dead ends: 23835 [2020-12-23 10:42:38,180 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 10:42:38,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23835 states. [2020-12-23 10:42:39,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23835 to 20062. [2020-12-23 10:42:39,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20062 states. [2020-12-23 10:42:39,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20062 states to 20062 states and 27851 transitions. [2020-12-23 10:42:39,599 INFO L78 Accepts]: Start accepts. Automaton has 20062 states and 27851 transitions. Word has length 62 [2020-12-23 10:42:39,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 10:42:39,600 INFO L481 AbstractCegarLoop]: Abstraction has 20062 states and 27851 transitions. [2020-12-23 10:42:39,600 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 10:42:39,600 INFO L276 IsEmpty]: Start isEmpty. Operand 20062 states and 27851 transitions. [2020-12-23 10:42:39,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-23 10:42:39,603 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 10:42:39,603 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 10:42:39,603 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-23 10:42:39,603 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 10:42:39,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 10:42:39,604 INFO L82 PathProgramCache]: Analyzing trace with hash -922232594, now seen corresponding path program 1 times [2020-12-23 10:42:39,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 10:42:39,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523078592] [2020-12-23 10:42:39,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 10:42:39,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 10:42:39,668 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 10:42:39,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523078592] [2020-12-23 10:42:39,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 10:42:39,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 10:42:39,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139602929] [2020-12-23 10:42:39,669 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 10:42:39,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 10:42:39,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 10:42:39,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-23 10:42:39,670 INFO L87 Difference]: Start difference. First operand 20062 states and 27851 transitions. Second operand 6 states. [2020-12-23 10:42:43,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 10:42:43,390 INFO L93 Difference]: Finished difference Result 68107 states and 94112 transitions. [2020-12-23 10:42:43,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 10:42:43,390 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 62 [2020-12-23 10:42:43,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 10:42:43,466 INFO L225 Difference]: With dead ends: 68107 [2020-12-23 10:42:43,466 INFO L226 Difference]: Without dead ends: 48110 [2020-12-23 10:42:43,500 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-12-23 10:42:43,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48110 states. [2020-12-23 10:42:46,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48110 to 47684. [2020-12-23 10:42:46,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47684 states. [2020-12-23 10:42:47,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47684 states to 47684 states and 65549 transitions. [2020-12-23 10:42:47,033 INFO L78 Accepts]: Start accepts. Automaton has 47684 states and 65549 transitions. Word has length 62 [2020-12-23 10:42:47,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 10:42:47,033 INFO L481 AbstractCegarLoop]: Abstraction has 47684 states and 65549 transitions. [2020-12-23 10:42:47,033 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 10:42:47,033 INFO L276 IsEmpty]: Start isEmpty. Operand 47684 states and 65549 transitions. [2020-12-23 10:42:47,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-23 10:42:47,037 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 10:42:47,037 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 10:42:47,037 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-23 10:42:47,037 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 10:42:47,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 10:42:47,038 INFO L82 PathProgramCache]: Analyzing trace with hash 695272297, now seen corresponding path program 1 times [2020-12-23 10:42:47,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 10:42:47,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045569939] [2020-12-23 10:42:47,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 10:42:47,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 10:42:47,107 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 10:42:47,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045569939] [2020-12-23 10:42:47,108 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 10:42:47,108 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 10:42:47,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907764737] [2020-12-23 10:42:47,109 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 10:42:47,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 10:42:47,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 10:42:47,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 10:42:47,110 INFO L87 Difference]: Start difference. First operand 47684 states and 65549 transitions. Second operand 5 states. [2020-12-23 10:42:51,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 10:42:51,146 INFO L93 Difference]: Finished difference Result 71761 states and 99653 transitions. [2020-12-23 10:42:51,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 10:42:51,147 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 62 [2020-12-23 10:42:51,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 10:42:51,228 INFO L225 Difference]: With dead ends: 71761 [2020-12-23 10:42:51,229 INFO L226 Difference]: Without dead ends: 64323 [2020-12-23 10:42:51,247 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 10:42:51,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64323 states. [2020-12-23 10:42:55,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64323 to 54832. [2020-12-23 10:42:55,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54832 states. [2020-12-23 10:42:55,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54832 states to 54832 states and 75441 transitions. [2020-12-23 10:42:55,209 INFO L78 Accepts]: Start accepts. Automaton has 54832 states and 75441 transitions. Word has length 62 [2020-12-23 10:42:55,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 10:42:55,209 INFO L481 AbstractCegarLoop]: Abstraction has 54832 states and 75441 transitions. [2020-12-23 10:42:55,209 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 10:42:55,209 INFO L276 IsEmpty]: Start isEmpty. Operand 54832 states and 75441 transitions. [2020-12-23 10:42:55,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-23 10:42:55,215 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 10:42:55,215 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 10:42:55,215 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-23 10:42:55,215 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 10:42:55,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 10:42:55,216 INFO L82 PathProgramCache]: Analyzing trace with hash -237073659, now seen corresponding path program 1 times [2020-12-23 10:42:55,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 10:42:55,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836611385] [2020-12-23 10:42:55,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 10:42:55,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 10:42:55,303 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 10:42:55,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836611385] [2020-12-23 10:42:55,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 10:42:55,303 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 10:42:55,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786815416] [2020-12-23 10:42:55,304 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 10:42:55,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 10:42:55,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 10:42:55,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 10:42:55,305 INFO L87 Difference]: Start difference. First operand 54832 states and 75441 transitions. Second operand 5 states. [2020-12-23 10:42:59,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 10:42:59,738 INFO L93 Difference]: Finished difference Result 81327 states and 112952 transitions. [2020-12-23 10:42:59,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 10:42:59,739 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 62 [2020-12-23 10:42:59,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 10:42:59,818 INFO L225 Difference]: With dead ends: 81327 [2020-12-23 10:42:59,818 INFO L226 Difference]: Without dead ends: 69390 [2020-12-23 10:42:59,834 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-23 10:42:59,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69390 states. [2020-12-23 10:43:04,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69390 to 64196. [2020-12-23 10:43:04,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64196 states. [2020-12-23 10:43:04,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64196 states to 64196 states and 88097 transitions. [2020-12-23 10:43:04,448 INFO L78 Accepts]: Start accepts. Automaton has 64196 states and 88097 transitions. Word has length 62 [2020-12-23 10:43:04,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 10:43:04,448 INFO L481 AbstractCegarLoop]: Abstraction has 64196 states and 88097 transitions. [2020-12-23 10:43:04,448 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 10:43:04,449 INFO L276 IsEmpty]: Start isEmpty. Operand 64196 states and 88097 transitions. [2020-12-23 10:43:04,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-23 10:43:04,454 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 10:43:04,454 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, 1, 1] [2020-12-23 10:43:04,454 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-23 10:43:04,454 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 10:43:04,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 10:43:04,455 INFO L82 PathProgramCache]: Analyzing trace with hash 1807529145, now seen corresponding path program 1 times [2020-12-23 10:43:04,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 10:43:04,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048090931] [2020-12-23 10:43:04,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 10:43:04,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 10:43:04,495 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 10:43:04,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048090931] [2020-12-23 10:43:04,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 10:43:04,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 10:43:04,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285366832] [2020-12-23 10:43:04,496 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 10:43:04,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 10:43:04,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 10:43:04,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 10:43:04,497 INFO L87 Difference]: Start difference. First operand 64196 states and 88097 transitions. Second operand 3 states. [2020-12-23 10:43:10,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 10:43:10,381 INFO L93 Difference]: Finished difference Result 141599 states and 193891 transitions. [2020-12-23 10:43:10,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 10:43:10,381 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 65 [2020-12-23 10:43:10,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 10:43:10,487 INFO L225 Difference]: With dead ends: 141599 [2020-12-23 10:43:10,487 INFO L226 Difference]: Without dead ends: 84266 [2020-12-23 10:43:10,538 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 10:43:10,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84266 states. [2020-12-23 10:43:16,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84266 to 80711. [2020-12-23 10:43:16,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80711 states. [2020-12-23 10:43:16,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80711 states to 80711 states and 109057 transitions. [2020-12-23 10:43:16,538 INFO L78 Accepts]: Start accepts. Automaton has 80711 states and 109057 transitions. Word has length 65 [2020-12-23 10:43:16,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 10:43:16,538 INFO L481 AbstractCegarLoop]: Abstraction has 80711 states and 109057 transitions. [2020-12-23 10:43:16,538 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 10:43:16,538 INFO L276 IsEmpty]: Start isEmpty. Operand 80711 states and 109057 transitions. [2020-12-23 10:43:16,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-23 10:43:16,546 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 10:43:16,546 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, 1, 1, 1, 1] [2020-12-23 10:43:16,546 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-23 10:43:16,547 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 10:43:16,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 10:43:16,547 INFO L82 PathProgramCache]: Analyzing trace with hash -1698199029, now seen corresponding path program 1 times [2020-12-23 10:43:16,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 10:43:16,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248985126] [2020-12-23 10:43:16,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 10:43:16,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 10:43:16,620 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 10:43:16,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248985126] [2020-12-23 10:43:16,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485577375] [2020-12-23 10:43:16,620 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 10:43:16,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 10:43:16,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 10:43:16,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 10:43:16,893 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 10:43:16,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 10:43:16,893 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2020-12-23 10:43:16,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19073259] [2020-12-23 10:43:16,894 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 10:43:16,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 10:43:16,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 10:43:16,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-12-23 10:43:16,895 INFO L87 Difference]: Start difference. First operand 80711 states and 109057 transitions. Second operand 11 states. [2020-12-23 10:43:31,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 10:43:31,144 INFO L93 Difference]: Finished difference Result 229924 states and 310323 transitions. [2020-12-23 10:43:31,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 10:43:31,144 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 67 [2020-12-23 10:43:31,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 10:43:31,552 INFO L225 Difference]: With dead ends: 229924 [2020-12-23 10:43:31,553 INFO L226 Difference]: Without dead ends: 170875 [2020-12-23 10:43:31,615 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2020-12-23 10:43:31,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170875 states. [2020-12-23 10:43:39,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170875 to 93967. [2020-12-23 10:43:39,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93967 states. [2020-12-23 10:43:40,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93967 states to 93967 states and 127026 transitions. [2020-12-23 10:43:40,253 INFO L78 Accepts]: Start accepts. Automaton has 93967 states and 127026 transitions. Word has length 67 [2020-12-23 10:43:40,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 10:43:40,253 INFO L481 AbstractCegarLoop]: Abstraction has 93967 states and 127026 transitions. [2020-12-23 10:43:40,254 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 10:43:40,254 INFO L276 IsEmpty]: Start isEmpty. Operand 93967 states and 127026 transitions. [2020-12-23 10:43:40,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-23 10:43:40,261 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 10:43:40,262 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, 1, 1, 1, 1] [2020-12-23 10:43:40,475 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-23 10:43:40,476 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 10:43:40,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 10:43:40,477 INFO L82 PathProgramCache]: Analyzing trace with hash -929496895, now seen corresponding path program 1 times [2020-12-23 10:43:40,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 10:43:40,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952854232] [2020-12-23 10:43:40,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 10:43:40,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 10:43:40,563 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 10:43:40,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952854232] [2020-12-23 10:43:40,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377418875] [2020-12-23 10:43:40,564 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 10:43:40,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 10:43:40,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 10:43:40,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 10:43:40,877 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 10:43:40,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 10:43:40,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2020-12-23 10:43:40,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110729877] [2020-12-23 10:43:40,879 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 10:43:40,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 10:43:40,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 10:43:40,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-12-23 10:43:40,880 INFO L87 Difference]: Start difference. First operand 93967 states and 127026 transitions. Second operand 11 states. [2020-12-23 10:43:53,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 10:43:53,072 INFO L93 Difference]: Finished difference Result 193539 states and 259994 transitions. [2020-12-23 10:43:53,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 10:43:53,072 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 67 [2020-12-23 10:43:53,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 10:43:53,262 INFO L225 Difference]: With dead ends: 193539 [2020-12-23 10:43:53,262 INFO L226 Difference]: Without dead ends: 123755 [2020-12-23 10:43:53,318 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2020-12-23 10:43:53,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123755 states. [2020-12-23 10:44:02,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123755 to 93849. [2020-12-23 10:44:02,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93849 states. [2020-12-23 10:44:02,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93849 states to 93849 states and 126196 transitions. [2020-12-23 10:44:02,357 INFO L78 Accepts]: Start accepts. Automaton has 93849 states and 126196 transitions. Word has length 67 [2020-12-23 10:44:02,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 10:44:02,357 INFO L481 AbstractCegarLoop]: Abstraction has 93849 states and 126196 transitions. [2020-12-23 10:44:02,357 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 10:44:02,357 INFO L276 IsEmpty]: Start isEmpty. Operand 93849 states and 126196 transitions. [2020-12-23 10:44:02,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-23 10:44:02,363 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 10:44:02,363 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, 1, 1, 1, 1] [2020-12-23 10:44:02,564 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-23 10:44:02,565 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 10:44:02,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 10:44:02,566 INFO L82 PathProgramCache]: Analyzing trace with hash -2073252700, now seen corresponding path program 1 times [2020-12-23 10:44:02,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 10:44:02,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569169588] [2020-12-23 10:44:02,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 10:44:02,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 10:44:02,832 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 10:44:02,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569169588] [2020-12-23 10:44:02,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765792354] [2020-12-23 10:44:02,833 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 10:44:02,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 10:44:02,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 10:44:02,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 10:44:03,107 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 10:44:03,108 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 10:44:03,108 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2020-12-23 10:44:03,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770514410] [2020-12-23 10:44:03,109 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 10:44:03,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 10:44:03,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 10:44:03,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-12-23 10:44:03,110 INFO L87 Difference]: Start difference. First operand 93849 states and 126196 transitions. Second operand 11 states. [2020-12-23 10:44:20,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 10:44:20,155 INFO L93 Difference]: Finished difference Result 212699 states and 284363 transitions. [2020-12-23 10:44:20,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 10:44:20,156 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 67 [2020-12-23 10:44:20,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 10:44:20,506 INFO L225 Difference]: With dead ends: 212699 [2020-12-23 10:44:20,506 INFO L226 Difference]: Without dead ends: 156545 [2020-12-23 10:44:20,578 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2020-12-23 10:44:20,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156545 states. [2020-12-23 10:44:31,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156545 to 102937. [2020-12-23 10:44:31,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102937 states. [2020-12-23 10:44:31,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102937 states to 102937 states and 138009 transitions. [2020-12-23 10:44:31,969 INFO L78 Accepts]: Start accepts. Automaton has 102937 states and 138009 transitions. Word has length 67 [2020-12-23 10:44:31,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 10:44:31,969 INFO L481 AbstractCegarLoop]: Abstraction has 102937 states and 138009 transitions. [2020-12-23 10:44:31,969 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 10:44:31,969 INFO L276 IsEmpty]: Start isEmpty. Operand 102937 states and 138009 transitions. [2020-12-23 10:44:31,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-23 10:44:31,977 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 10:44:31,977 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, 1, 1, 1, 1, 1, 1] [2020-12-23 10:44:32,191 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 10:44:32,192 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 10:44:32,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 10:44:32,193 INFO L82 PathProgramCache]: Analyzing trace with hash 379264655, now seen corresponding path program 1 times [2020-12-23 10:44:32,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 10:44:32,194 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449131096] [2020-12-23 10:44:32,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 10:44:32,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 10:44:32,445 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 10:44:32,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449131096] [2020-12-23 10:44:32,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830446120] [2020-12-23 10:44:32,446 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 10:44:32,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 10:44:32,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-23 10:44:32,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 10:44:32,803 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 10:44:33,031 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 10:44:33,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 10:44:33,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-23 10:44:33,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641452091] [2020-12-23 10:44:33,033 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 10:44:33,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 10:44:33,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 10:44:33,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2020-12-23 10:44:33,034 INFO L87 Difference]: Start difference. First operand 102937 states and 138009 transitions. Second operand 17 states.