/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.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 20:56:01,735 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 20:56:01,738 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 20:56:01,798 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 20:56:01,799 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 20:56:01,804 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 20:56:01,809 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 20:56:01,815 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 20:56:01,819 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 20:56:01,825 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 20:56:01,829 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 20:56:01,831 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 20:56:01,832 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 20:56:01,835 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 20:56:01,838 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 20:56:01,840 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 20:56:01,841 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 20:56:01,857 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 20:56:01,860 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 20:56:01,862 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 20:56:01,864 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 20:56:01,865 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 20:56:01,867 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 20:56:01,868 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 20:56:01,871 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-01-06 20:56:01,871 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-01-06 20:56:01,872 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-01-06 20:56:01,873 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-01-06 20:56:01,873 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-01-06 20:56:01,875 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-01-06 20:56:01,875 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 20:56:01,876 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 20:56:01,877 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 20:56:01,878 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 20:56:01,879 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 20:56:01,879 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 20:56:01,880 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 20:56:01,880 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 20:56:01,881 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 20:56:01,882 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 20:56:01,882 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 20:56:01,883 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 20:56:01,914 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 20:56:01,915 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 20:56:01,916 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 20:56:01,917 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 20:56:01,917 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 20:56:01,917 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 20:56:01,917 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 20:56:01,918 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 20:56:01,918 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 20:56:01,918 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 20:56:01,918 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 20:56:01,918 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 20:56:01,919 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 20:56:01,919 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 20:56:01,919 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 20:56:01,919 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 20:56:01,920 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 20:56:01,920 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 20:56:01,920 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 20:56:01,920 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 20:56:01,920 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 20:56:01,921 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 20:56:01,921 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 20:56:01,921 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 20:56:01,921 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 20:56:01,921 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 20:56:02,354 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 20:56:02,382 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 20:56:02,385 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 20:56:02,387 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 20:56:02,388 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 20:56:02,389 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2021-01-06 20:56:02,464 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/07b1bcf62/363299b97fc04a7aae92004e63284ec9/FLAG19137c591 [2021-01-06 20:56:03,085 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 20:56:03,086 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2021-01-06 20:56:03,099 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/07b1bcf62/363299b97fc04a7aae92004e63284ec9/FLAG19137c591 [2021-01-06 20:56:03,408 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/07b1bcf62/363299b97fc04a7aae92004e63284ec9 [2021-01-06 20:56:03,411 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 20:56:03,414 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 20:56:03,419 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 20:56:03,420 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 20:56:03,427 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 20:56:03,428 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 08:56:03" (1/1) ... [2021-01-06 20:56:03,430 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ce2feb3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 08:56:03, skipping insertion in model container [2021-01-06 20:56:03,430 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 08:56:03" (1/1) ... [2021-01-06 20:56:03,440 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 20:56:03,504 INFO L178 MainTranslator]: Built tables and reachable declarations left hand side expression in assignment: lhs: VariableLHS[~main__c1~0,] left hand side expression in assignment: lhs: VariableLHS[~r1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~id1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~st1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~id2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~st2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~id3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~st3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~id4~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~st4~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send4~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode4~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~init__tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~__return_2937~0,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[~p4_old~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p4_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[~p4_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[~node4__m4~0,] left hand side expression in assignment: lhs: VariableLHS[~node4__m4~0,] left hand side expression in assignment: lhs: VariableLHS[~p3_old~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send4~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode4~0,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[~p4_old~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p4_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~check__tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~__return_3032~0,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,] [2021-01-06 20:56:03,709 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.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c[4498,4511] left hand side expression in assignment: lhs: VariableLHS[~main__i2~0,] left hand side expression in assignment: lhs: VariableLHS[~check__tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~check__tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~check__tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~check__tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~st4~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~node4____CPAchecker_TMP_0~0,] left hand side expression in assignment: lhs: VariableLHS[~p4_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode4~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~node4____CPAchecker_TMP_0~0,] left hand side expression in assignment: lhs: VariableLHS[~st3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~node3____CPAchecker_TMP_0~0,] left hand side expression in assignment: lhs: VariableLHS[~p3_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~node3____CPAchecker_TMP_0~0,] left hand side expression in assignment: lhs: VariableLHS[~st2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~node2____CPAchecker_TMP_0~0,] left hand side expression in assignment: lhs: VariableLHS[~p2_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~node2____CPAchecker_TMP_0~0,] left hand side expression in assignment: lhs: VariableLHS[~st1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~node1____CPAchecker_TMP_0~0,] left hand side expression in assignment: lhs: VariableLHS[~p1_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~node1____CPAchecker_TMP_0~0,] left hand side expression in assignment: lhs: VariableLHS[~__return_3101~0,GLOBAL] [2021-01-06 20:56:03,737 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 20:56:03,762 INFO L203 MainTranslator]: Completed pre-run left hand side expression in assignment: lhs: VariableLHS[~main__c1~0,] left hand side expression in assignment: lhs: VariableLHS[~r1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~id1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~st1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~id2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~st2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~id3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~st3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~id4~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~st4~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send4~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode4~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~init__tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~__return_2937~0,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[~p4_old~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p4_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[~p4_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[~node4__m4~0,] left hand side expression in assignment: lhs: VariableLHS[~node4__m4~0,] left hand side expression in assignment: lhs: VariableLHS[~p3_old~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send4~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode4~0,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[~p4_old~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p4_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~check__tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~__return_3032~0,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,] [2021-01-06 20:56:03,865 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.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c[4498,4511] left hand side expression in assignment: lhs: VariableLHS[~main__i2~0,] left hand side expression in assignment: lhs: VariableLHS[~check__tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~check__tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~check__tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~check__tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~st4~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~node4____CPAchecker_TMP_0~0,] left hand side expression in assignment: lhs: VariableLHS[~p4_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode4~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~node4____CPAchecker_TMP_0~0,] left hand side expression in assignment: lhs: VariableLHS[~st3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~node3____CPAchecker_TMP_0~0,] left hand side expression in assignment: lhs: VariableLHS[~p3_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~node3____CPAchecker_TMP_0~0,] left hand side expression in assignment: lhs: VariableLHS[~st2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~node2____CPAchecker_TMP_0~0,] left hand side expression in assignment: lhs: VariableLHS[~p2_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~node2____CPAchecker_TMP_0~0,] left hand side expression in assignment: lhs: VariableLHS[~st1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~node1____CPAchecker_TMP_0~0,] left hand side expression in assignment: lhs: VariableLHS[~p1_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~node1____CPAchecker_TMP_0~0,] left hand side expression in assignment: lhs: VariableLHS[~__return_3101~0,GLOBAL] [2021-01-06 20:56:03,906 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 20:56:03,939 INFO L208 MainTranslator]: Completed translation [2021-01-06 20:56:03,940 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 08:56:03 WrapperNode [2021-01-06 20:56:03,940 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 20:56:03,941 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 20:56:03,941 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 20:56:03,942 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 20:56:03,951 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 08:56:03" (1/1) ... [2021-01-06 20:56:03,963 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 08:56:03" (1/1) ... [2021-01-06 20:56:03,998 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 20:56:03,999 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 20:56:04,000 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 20:56:04,000 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 20:56:04,012 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 08:56:03" (1/1) ... [2021-01-06 20:56:04,012 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 08:56:03" (1/1) ... [2021-01-06 20:56:04,016 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 08:56:03" (1/1) ... [2021-01-06 20:56:04,016 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 08:56:03" (1/1) ... [2021-01-06 20:56:04,023 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 08:56:03" (1/1) ... [2021-01-06 20:56:04,027 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 08:56:03" (1/1) ... [2021-01-06 20:56:04,030 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 08:56:03" (1/1) ... [2021-01-06 20:56:04,034 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 20:56:04,035 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 20:56:04,036 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 20:56:04,036 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 20:56:04,037 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 08:56:03" (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 [2021-01-06 20:56:04,161 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 20:56:04,163 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 20:56:04,163 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 20:56:04,163 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 20:56:04,870 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 20:56:04,870 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-01-06 20:56:04,872 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 08:56:04 BoogieIcfgContainer [2021-01-06 20:56:04,872 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 20:56:04,874 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 20:56:04,874 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 20:56:04,878 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 20:56:04,878 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 08:56:03" (1/3) ... [2021-01-06 20:56:04,879 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11bf405f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 08:56:04, skipping insertion in model container [2021-01-06 20:56:04,879 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 08:56:03" (2/3) ... [2021-01-06 20:56:04,880 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11bf405f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 08:56:04, skipping insertion in model container [2021-01-06 20:56:04,880 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 08:56:04" (3/3) ... [2021-01-06 20:56:04,881 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2021-01-06 20:56:04,888 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 20:56:04,893 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 20:56:04,913 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 20:56:04,940 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 20:56:04,941 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 20:56:04,941 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 20:56:04,941 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 20:56:04,941 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 20:56:04,941 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 20:56:04,941 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 20:56:04,942 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 20:56:04,959 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states. [2021-01-06 20:56:04,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-01-06 20:56:04,967 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 20:56:04,967 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 20:56:04,968 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 20:56:04,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 20:56:04,974 INFO L82 PathProgramCache]: Analyzing trace with hash -347547403, now seen corresponding path program 1 times [2021-01-06 20:56:04,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 20:56:04,985 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685366087] [2021-01-06 20:56:04,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 20:56:05,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 20:56:05,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 20:56:05,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685366087] [2021-01-06 20:56:05,363 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 20:56:05,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 20:56:05,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077557135] [2021-01-06 20:56:05,369 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 20:56:05,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 20:56:05,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 20:56:05,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 20:56:05,390 INFO L87 Difference]: Start difference. First operand 79 states. Second operand 3 states. [2021-01-06 20:56:05,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 20:56:05,461 INFO L93 Difference]: Finished difference Result 177 states and 286 transitions. [2021-01-06 20:56:05,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 20:56:05,463 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 47 [2021-01-06 20:56:05,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 20:56:05,476 INFO L225 Difference]: With dead ends: 177 [2021-01-06 20:56:05,476 INFO L226 Difference]: Without dead ends: 118 [2021-01-06 20:56:05,480 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 [2021-01-06 20:56:05,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-01-06 20:56:05,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 116. [2021-01-06 20:56:05,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2021-01-06 20:56:05,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 169 transitions. [2021-01-06 20:56:05,540 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 169 transitions. Word has length 47 [2021-01-06 20:56:05,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 20:56:05,541 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 169 transitions. [2021-01-06 20:56:05,541 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 20:56:05,542 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 169 transitions. [2021-01-06 20:56:05,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-06 20:56:05,544 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 20:56:05,544 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 20:56:05,544 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 20:56:05,544 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 20:56:05,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 20:56:05,546 INFO L82 PathProgramCache]: Analyzing trace with hash -391185874, now seen corresponding path program 1 times [2021-01-06 20:56:05,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 20:56:05,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971240500] [2021-01-06 20:56:05,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 20:56:05,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 20:56:05,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 20:56:05,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971240500] [2021-01-06 20:56:05,733 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 20:56:05,733 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 20:56:05,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594580095] [2021-01-06 20:56:05,736 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 20:56:05,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 20:56:05,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 20:56:05,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 20:56:05,738 INFO L87 Difference]: Start difference. First operand 116 states and 169 transitions. Second operand 3 states. [2021-01-06 20:56:05,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 20:56:05,815 INFO L93 Difference]: Finished difference Result 280 states and 429 transitions. [2021-01-06 20:56:05,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 20:56:05,816 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 48 [2021-01-06 20:56:05,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 20:56:05,821 INFO L225 Difference]: With dead ends: 280 [2021-01-06 20:56:05,822 INFO L226 Difference]: Without dead ends: 190 [2021-01-06 20:56:05,823 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 [2021-01-06 20:56:05,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-01-06 20:56:05,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 188. [2021-01-06 20:56:05,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2021-01-06 20:56:05,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 283 transitions. [2021-01-06 20:56:05,885 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 283 transitions. Word has length 48 [2021-01-06 20:56:05,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 20:56:05,888 INFO L481 AbstractCegarLoop]: Abstraction has 188 states and 283 transitions. [2021-01-06 20:56:05,889 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 20:56:05,889 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 283 transitions. [2021-01-06 20:56:05,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-01-06 20:56:05,891 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 20:56:05,891 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 20:56:05,893 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-06 20:56:05,893 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 20:56:05,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 20:56:05,894 INFO L82 PathProgramCache]: Analyzing trace with hash -2047730124, now seen corresponding path program 1 times [2021-01-06 20:56:05,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 20:56:05,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788649746] [2021-01-06 20:56:05,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 20:56:05,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 20:56:06,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 20:56:06,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788649746] [2021-01-06 20:56:06,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 20:56:06,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 20:56:06,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216862611] [2021-01-06 20:56:06,033 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 20:56:06,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 20:56:06,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 20:56:06,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 20:56:06,035 INFO L87 Difference]: Start difference. First operand 188 states and 283 transitions. Second operand 3 states. [2021-01-06 20:56:06,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 20:56:06,083 INFO L93 Difference]: Finished difference Result 480 states and 745 transitions. [2021-01-06 20:56:06,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 20:56:06,084 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 49 [2021-01-06 20:56:06,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 20:56:06,088 INFO L225 Difference]: With dead ends: 480 [2021-01-06 20:56:06,088 INFO L226 Difference]: Without dead ends: 318 [2021-01-06 20:56:06,093 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 [2021-01-06 20:56:06,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-01-06 20:56:06,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 316. [2021-01-06 20:56:06,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 316 states. [2021-01-06 20:56:06,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 483 transitions. [2021-01-06 20:56:06,174 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 483 transitions. Word has length 49 [2021-01-06 20:56:06,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 20:56:06,174 INFO L481 AbstractCegarLoop]: Abstraction has 316 states and 483 transitions. [2021-01-06 20:56:06,174 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 20:56:06,175 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 483 transitions. [2021-01-06 20:56:06,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-01-06 20:56:06,180 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 20:56:06,180 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 20:56:06,181 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-01-06 20:56:06,181 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 20:56:06,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 20:56:06,182 INFO L82 PathProgramCache]: Analyzing trace with hash -415311335, now seen corresponding path program 1 times [2021-01-06 20:56:06,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 20:56:06,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643356532] [2021-01-06 20:56:06,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 20:56:06,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 20:56:06,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 20:56:06,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643356532] [2021-01-06 20:56:06,333 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 20:56:06,333 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 20:56:06,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408780195] [2021-01-06 20:56:06,334 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 20:56:06,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 20:56:06,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 20:56:06,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 20:56:06,339 INFO L87 Difference]: Start difference. First operand 316 states and 483 transitions. Second operand 3 states. [2021-01-06 20:56:06,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 20:56:06,411 INFO L93 Difference]: Finished difference Result 832 states and 1293 transitions. [2021-01-06 20:56:06,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 20:56:06,413 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 50 [2021-01-06 20:56:06,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 20:56:06,419 INFO L225 Difference]: With dead ends: 832 [2021-01-06 20:56:06,419 INFO L226 Difference]: Without dead ends: 542 [2021-01-06 20:56:06,425 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 [2021-01-06 20:56:06,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2021-01-06 20:56:06,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 540. [2021-01-06 20:56:06,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 540 states. [2021-01-06 20:56:06,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 827 transitions. [2021-01-06 20:56:06,489 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 827 transitions. Word has length 50 [2021-01-06 20:56:06,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 20:56:06,491 INFO L481 AbstractCegarLoop]: Abstraction has 540 states and 827 transitions. [2021-01-06 20:56:06,491 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 20:56:06,491 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 827 transitions. [2021-01-06 20:56:06,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-01-06 20:56:06,492 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 20:56:06,492 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 20:56:06,492 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-01-06 20:56:06,493 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 20:56:06,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 20:56:06,494 INFO L82 PathProgramCache]: Analyzing trace with hash -103942672, now seen corresponding path program 1 times [2021-01-06 20:56:06,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 20:56:06,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240899962] [2021-01-06 20:56:06,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 20:56:06,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 20:56:06,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 20:56:06,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240899962] [2021-01-06 20:56:06,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 20:56:06,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 20:56:06,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524511434] [2021-01-06 20:56:06,621 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 20:56:06,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 20:56:06,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 20:56:06,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-01-06 20:56:06,623 INFO L87 Difference]: Start difference. First operand 540 states and 827 transitions. Second operand 5 states. [2021-01-06 20:56:06,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 20:56:06,905 INFO L93 Difference]: Finished difference Result 1568 states and 2429 transitions. [2021-01-06 20:56:06,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 20:56:06,906 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 51 [2021-01-06 20:56:06,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 20:56:06,912 INFO L225 Difference]: With dead ends: 1568 [2021-01-06 20:56:06,912 INFO L226 Difference]: Without dead ends: 1054 [2021-01-06 20:56:06,914 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-01-06 20:56:06,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1054 states. [2021-01-06 20:56:06,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1054 to 1052. [2021-01-06 20:56:06,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1052 states. [2021-01-06 20:56:07,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1052 states to 1052 states and 1619 transitions. [2021-01-06 20:56:07,003 INFO L78 Accepts]: Start accepts. Automaton has 1052 states and 1619 transitions. Word has length 51 [2021-01-06 20:56:07,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 20:56:07,003 INFO L481 AbstractCegarLoop]: Abstraction has 1052 states and 1619 transitions. [2021-01-06 20:56:07,004 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 20:56:07,004 INFO L276 IsEmpty]: Start isEmpty. Operand 1052 states and 1619 transitions. [2021-01-06 20:56:07,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-01-06 20:56:07,005 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 20:56:07,005 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 20:56:07,005 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-01-06 20:56:07,005 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 20:56:07,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 20:56:07,006 INFO L82 PathProgramCache]: Analyzing trace with hash -1568014229, now seen corresponding path program 1 times [2021-01-06 20:56:07,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 20:56:07,006 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103354559] [2021-01-06 20:56:07,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 20:56:07,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 20:56:07,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 20:56:07,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103354559] [2021-01-06 20:56:07,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 20:56:07,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 20:56:07,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699356458] [2021-01-06 20:56:07,075 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 20:56:07,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 20:56:07,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 20:56:07,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-01-06 20:56:07,077 INFO L87 Difference]: Start difference. First operand 1052 states and 1619 transitions. Second operand 5 states. [2021-01-06 20:56:07,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 20:56:07,240 INFO L93 Difference]: Finished difference Result 2078 states and 3212 transitions. [2021-01-06 20:56:07,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 20:56:07,241 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 51 [2021-01-06 20:56:07,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 20:56:07,246 INFO L225 Difference]: With dead ends: 2078 [2021-01-06 20:56:07,247 INFO L226 Difference]: Without dead ends: 1052 [2021-01-06 20:56:07,249 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-01-06 20:56:07,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1052 states. [2021-01-06 20:56:07,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1052 to 1052. [2021-01-06 20:56:07,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1052 states. [2021-01-06 20:56:07,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1052 states to 1052 states and 1603 transitions. [2021-01-06 20:56:07,330 INFO L78 Accepts]: Start accepts. Automaton has 1052 states and 1603 transitions. Word has length 51 [2021-01-06 20:56:07,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 20:56:07,331 INFO L481 AbstractCegarLoop]: Abstraction has 1052 states and 1603 transitions. [2021-01-06 20:56:07,331 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 20:56:07,331 INFO L276 IsEmpty]: Start isEmpty. Operand 1052 states and 1603 transitions. [2021-01-06 20:56:07,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-01-06 20:56:07,332 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 20:56:07,332 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 20:56:07,332 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-01-06 20:56:07,332 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 20:56:07,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 20:56:07,333 INFO L82 PathProgramCache]: Analyzing trace with hash 884922534, now seen corresponding path program 1 times [2021-01-06 20:56:07,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 20:56:07,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591725365] [2021-01-06 20:56:07,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 20:56:07,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 20:56:07,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 20:56:07,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591725365] [2021-01-06 20:56:07,395 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 20:56:07,395 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 20:56:07,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8828770] [2021-01-06 20:56:07,396 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 20:56:07,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 20:56:07,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 20:56:07,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-01-06 20:56:07,397 INFO L87 Difference]: Start difference. First operand 1052 states and 1603 transitions. Second operand 5 states. [2021-01-06 20:56:07,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 20:56:07,572 INFO L93 Difference]: Finished difference Result 2078 states and 3180 transitions. [2021-01-06 20:56:07,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 20:56:07,573 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 51 [2021-01-06 20:56:07,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 20:56:07,579 INFO L225 Difference]: With dead ends: 2078 [2021-01-06 20:56:07,579 INFO L226 Difference]: Without dead ends: 1052 [2021-01-06 20:56:07,581 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-01-06 20:56:07,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1052 states. [2021-01-06 20:56:07,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1052 to 1052. [2021-01-06 20:56:07,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1052 states. [2021-01-06 20:56:07,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1052 states to 1052 states and 1587 transitions. [2021-01-06 20:56:07,668 INFO L78 Accepts]: Start accepts. Automaton has 1052 states and 1587 transitions. Word has length 51 [2021-01-06 20:56:07,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 20:56:07,669 INFO L481 AbstractCegarLoop]: Abstraction has 1052 states and 1587 transitions. [2021-01-06 20:56:07,669 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 20:56:07,669 INFO L276 IsEmpty]: Start isEmpty. Operand 1052 states and 1587 transitions. [2021-01-06 20:56:07,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-01-06 20:56:07,670 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 20:56:07,670 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 20:56:07,670 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-01-06 20:56:07,671 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 20:56:07,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 20:56:07,671 INFO L82 PathProgramCache]: Analyzing trace with hash -562107061, now seen corresponding path program 1 times [2021-01-06 20:56:07,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 20:56:07,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413300951] [2021-01-06 20:56:07,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 20:56:07,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 20:56:07,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 20:56:07,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413300951] [2021-01-06 20:56:07,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 20:56:07,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-01-06 20:56:07,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918938491] [2021-01-06 20:56:07,787 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 20:56:07,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 20:56:07,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 20:56:07,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-01-06 20:56:07,789 INFO L87 Difference]: Start difference. First operand 1052 states and 1587 transitions. Second operand 6 states. [2021-01-06 20:56:08,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 20:56:08,629 INFO L93 Difference]: Finished difference Result 9260 states and 14075 transitions. [2021-01-06 20:56:08,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 20:56:08,630 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 51 [2021-01-06 20:56:08,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 20:56:08,673 INFO L225 Difference]: With dead ends: 9260 [2021-01-06 20:56:08,674 INFO L226 Difference]: Without dead ends: 8234 [2021-01-06 20:56:08,680 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-01-06 20:56:08,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8234 states. [2021-01-06 20:56:08,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8234 to 2076. [2021-01-06 20:56:08,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2076 states. [2021-01-06 20:56:09,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2076 states to 2076 states and 3083 transitions. [2021-01-06 20:56:09,004 INFO L78 Accepts]: Start accepts. Automaton has 2076 states and 3083 transitions. Word has length 51 [2021-01-06 20:56:09,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 20:56:09,005 INFO L481 AbstractCegarLoop]: Abstraction has 2076 states and 3083 transitions. [2021-01-06 20:56:09,005 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 20:56:09,005 INFO L276 IsEmpty]: Start isEmpty. Operand 2076 states and 3083 transitions. [2021-01-06 20:56:09,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-06 20:56:09,006 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 20:56:09,006 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 20:56:09,006 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-01-06 20:56:09,006 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 20:56:09,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 20:56:09,007 INFO L82 PathProgramCache]: Analyzing trace with hash 59171559, now seen corresponding path program 1 times [2021-01-06 20:56:09,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 20:56:09,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729608918] [2021-01-06 20:56:09,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 20:56:09,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 20:56:09,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 20:56:09,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729608918] [2021-01-06 20:56:09,050 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 20:56:09,050 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 20:56:09,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293921468] [2021-01-06 20:56:09,050 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 20:56:09,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 20:56:09,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 20:56:09,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 20:56:09,052 INFO L87 Difference]: Start difference. First operand 2076 states and 3083 transitions. Second operand 3 states. [2021-01-06 20:56:09,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 20:56:09,310 INFO L93 Difference]: Finished difference Result 4618 states and 6855 transitions. [2021-01-06 20:56:09,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 20:56:09,315 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 53 [2021-01-06 20:56:09,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 20:56:09,328 INFO L225 Difference]: With dead ends: 4618 [2021-01-06 20:56:09,329 INFO L226 Difference]: Without dead ends: 2568 [2021-01-06 20:56:09,332 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 [2021-01-06 20:56:09,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2568 states. [2021-01-06 20:56:09,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2568 to 2566. [2021-01-06 20:56:09,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2566 states. [2021-01-06 20:56:09,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2566 states to 2566 states and 3773 transitions. [2021-01-06 20:56:09,597 INFO L78 Accepts]: Start accepts. Automaton has 2566 states and 3773 transitions. Word has length 53 [2021-01-06 20:56:09,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 20:56:09,598 INFO L481 AbstractCegarLoop]: Abstraction has 2566 states and 3773 transitions. [2021-01-06 20:56:09,598 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 20:56:09,598 INFO L276 IsEmpty]: Start isEmpty. Operand 2566 states and 3773 transitions. [2021-01-06 20:56:09,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-06 20:56:09,598 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 20:56:09,599 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 20:56:09,599 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-01-06 20:56:09,599 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 20:56:09,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 20:56:09,600 INFO L82 PathProgramCache]: Analyzing trace with hash 80174214, now seen corresponding path program 1 times [2021-01-06 20:56:09,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 20:56:09,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953310840] [2021-01-06 20:56:09,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 20:56:09,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 20:56:09,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 20:56:09,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953310840] [2021-01-06 20:56:09,858 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 20:56:09,858 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-01-06 20:56:09,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415327446] [2021-01-06 20:56:09,859 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 20:56:09,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 20:56:09,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 20:56:09,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 20:56:09,860 INFO L87 Difference]: Start difference. First operand 2566 states and 3773 transitions. Second operand 6 states. [2021-01-06 20:56:10,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 20:56:10,466 INFO L93 Difference]: Finished difference Result 7638 states and 11329 transitions. [2021-01-06 20:56:10,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 20:56:10,467 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 53 [2021-01-06 20:56:10,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 20:56:10,495 INFO L225 Difference]: With dead ends: 7638 [2021-01-06 20:56:10,495 INFO L226 Difference]: Without dead ends: 5100 [2021-01-06 20:56:10,500 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 20:56:10,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5100 states. [2021-01-06 20:56:10,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5100 to 2566. [2021-01-06 20:56:10,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2566 states. [2021-01-06 20:56:10,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2566 states to 2566 states and 3733 transitions. [2021-01-06 20:56:10,828 INFO L78 Accepts]: Start accepts. Automaton has 2566 states and 3733 transitions. Word has length 53 [2021-01-06 20:56:10,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 20:56:10,829 INFO L481 AbstractCegarLoop]: Abstraction has 2566 states and 3733 transitions. [2021-01-06 20:56:10,829 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 20:56:10,829 INFO L276 IsEmpty]: Start isEmpty. Operand 2566 states and 3733 transitions. [2021-01-06 20:56:10,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-01-06 20:56:10,830 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 20:56:10,830 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 20:56:10,830 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-01-06 20:56:10,831 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 20:56:10,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 20:56:10,831 INFO L82 PathProgramCache]: Analyzing trace with hash -1811476054, now seen corresponding path program 1 times [2021-01-06 20:56:10,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 20:56:10,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144685513] [2021-01-06 20:56:10,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 20:56:10,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 20:56:10,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 20:56:10,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144685513] [2021-01-06 20:56:10,903 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 20:56:10,903 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 20:56:10,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80655977] [2021-01-06 20:56:10,903 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 20:56:10,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 20:56:10,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 20:56:10,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-01-06 20:56:10,904 INFO L87 Difference]: Start difference. First operand 2566 states and 3733 transitions. Second operand 5 states. [2021-01-06 20:56:11,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 20:56:11,393 INFO L93 Difference]: Finished difference Result 4888 states and 7077 transitions. [2021-01-06 20:56:11,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 20:56:11,394 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 54 [2021-01-06 20:56:11,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 20:56:11,418 INFO L225 Difference]: With dead ends: 4888 [2021-01-06 20:56:11,418 INFO L226 Difference]: Without dead ends: 4886 [2021-01-06 20:56:11,420 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 [2021-01-06 20:56:11,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4886 states. [2021-01-06 20:56:11,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4886 to 2694. [2021-01-06 20:56:11,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2694 states. [2021-01-06 20:56:11,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2694 states to 2694 states and 3853 transitions. [2021-01-06 20:56:11,753 INFO L78 Accepts]: Start accepts. Automaton has 2694 states and 3853 transitions. Word has length 54 [2021-01-06 20:56:11,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 20:56:11,753 INFO L481 AbstractCegarLoop]: Abstraction has 2694 states and 3853 transitions. [2021-01-06 20:56:11,753 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 20:56:11,753 INFO L276 IsEmpty]: Start isEmpty. Operand 2694 states and 3853 transitions. [2021-01-06 20:56:11,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-01-06 20:56:11,761 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 20:56:11,761 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 20:56:11,762 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-01-06 20:56:11,762 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 20:56:11,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 20:56:11,763 INFO L82 PathProgramCache]: Analyzing trace with hash 1690284398, now seen corresponding path program 1 times [2021-01-06 20:56:11,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 20:56:11,763 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517457851] [2021-01-06 20:56:11,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 20:56:11,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 20:56:11,876 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 20:56:11,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517457851] [2021-01-06 20:56:11,877 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 20:56:11,877 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-01-06 20:56:11,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665646095] [2021-01-06 20:56:11,878 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 20:56:11,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 20:56:11,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 20:56:11,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-01-06 20:56:11,879 INFO L87 Difference]: Start difference. First operand 2694 states and 3853 transitions. Second operand 6 states. [2021-01-06 20:56:13,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 20:56:13,341 INFO L93 Difference]: Finished difference Result 13720 states and 19666 transitions. [2021-01-06 20:56:13,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 20:56:13,342 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 76 [2021-01-06 20:56:13,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 20:56:13,389 INFO L225 Difference]: With dead ends: 13720 [2021-01-06 20:56:13,389 INFO L226 Difference]: Without dead ends: 11542 [2021-01-06 20:56:13,396 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-01-06 20:56:13,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11542 states. [2021-01-06 20:56:14,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11542 to 5118. [2021-01-06 20:56:14,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5118 states. [2021-01-06 20:56:14,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5118 states to 5118 states and 7301 transitions. [2021-01-06 20:56:14,235 INFO L78 Accepts]: Start accepts. Automaton has 5118 states and 7301 transitions. Word has length 76 [2021-01-06 20:56:14,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 20:56:14,235 INFO L481 AbstractCegarLoop]: Abstraction has 5118 states and 7301 transitions. [2021-01-06 20:56:14,235 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 20:56:14,235 INFO L276 IsEmpty]: Start isEmpty. Operand 5118 states and 7301 transitions. [2021-01-06 20:56:14,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-01-06 20:56:14,238 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 20:56:14,238 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 20:56:14,239 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-01-06 20:56:14,239 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 20:56:14,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 20:56:14,240 INFO L82 PathProgramCache]: Analyzing trace with hash -34257664, now seen corresponding path program 1 times [2021-01-06 20:56:14,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 20:56:14,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607317321] [2021-01-06 20:56:14,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 20:56:14,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 20:56:14,358 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-01-06 20:56:14,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607317321] [2021-01-06 20:56:14,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 20:56:14,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-01-06 20:56:14,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562608315] [2021-01-06 20:56:14,360 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 20:56:14,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 20:56:14,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 20:56:14,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 20:56:14,362 INFO L87 Difference]: Start difference. First operand 5118 states and 7301 transitions. Second operand 6 states. [2021-01-06 20:56:15,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 20:56:15,679 INFO L93 Difference]: Finished difference Result 16384 states and 23458 transitions. [2021-01-06 20:56:15,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 20:56:15,679 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 76 [2021-01-06 20:56:15,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 20:56:15,711 INFO L225 Difference]: With dead ends: 16384 [2021-01-06 20:56:15,712 INFO L226 Difference]: Without dead ends: 13718 [2021-01-06 20:56:15,721 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 20:56:15,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13718 states. [2021-01-06 20:56:16,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13718 to 8870. [2021-01-06 20:56:16,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8870 states. [2021-01-06 20:56:16,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8870 states to 8870 states and 12613 transitions. [2021-01-06 20:56:16,918 INFO L78 Accepts]: Start accepts. Automaton has 8870 states and 12613 transitions. Word has length 76 [2021-01-06 20:56:16,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 20:56:16,919 INFO L481 AbstractCegarLoop]: Abstraction has 8870 states and 12613 transitions. [2021-01-06 20:56:16,919 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 20:56:16,919 INFO L276 IsEmpty]: Start isEmpty. Operand 8870 states and 12613 transitions. [2021-01-06 20:56:16,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-01-06 20:56:16,922 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 20:56:16,922 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 20:56:16,923 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-01-06 20:56:16,923 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 20:56:16,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 20:56:16,924 INFO L82 PathProgramCache]: Analyzing trace with hash 1119688442, now seen corresponding path program 1 times [2021-01-06 20:56:16,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 20:56:16,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131781172] [2021-01-06 20:56:16,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 20:56:16,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 20:56:17,027 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-01-06 20:56:17,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131781172] [2021-01-06 20:56:17,028 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 20:56:17,028 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-01-06 20:56:17,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553938657] [2021-01-06 20:56:17,028 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 20:56:17,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 20:56:17,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 20:56:17,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-01-06 20:56:17,030 INFO L87 Difference]: Start difference. First operand 8870 states and 12613 transitions. Second operand 6 states. [2021-01-06 20:56:18,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 20:56:18,708 INFO L93 Difference]: Finished difference Result 19048 states and 27242 transitions. [2021-01-06 20:56:18,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 20:56:18,709 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 76 [2021-01-06 20:56:18,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 20:56:18,743 INFO L225 Difference]: With dead ends: 19048 [2021-01-06 20:56:18,744 INFO L226 Difference]: Without dead ends: 16382 [2021-01-06 20:56:18,753 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-01-06 20:56:18,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16382 states. [2021-01-06 20:56:19,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16382 to 11534. [2021-01-06 20:56:19,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11534 states. [2021-01-06 20:56:19,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11534 states to 11534 states and 16397 transitions. [2021-01-06 20:56:19,951 INFO L78 Accepts]: Start accepts. Automaton has 11534 states and 16397 transitions. Word has length 76 [2021-01-06 20:56:19,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 20:56:19,951 INFO L481 AbstractCegarLoop]: Abstraction has 11534 states and 16397 transitions. [2021-01-06 20:56:19,951 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 20:56:19,952 INFO L276 IsEmpty]: Start isEmpty. Operand 11534 states and 16397 transitions. [2021-01-06 20:56:19,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-01-06 20:56:19,954 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 20:56:19,955 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 20:56:19,955 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-01-06 20:56:19,955 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 20:56:19,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 20:56:19,955 INFO L82 PathProgramCache]: Analyzing trace with hash 261787764, now seen corresponding path program 1 times [2021-01-06 20:56:19,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 20:56:19,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325516123] [2021-01-06 20:56:19,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 20:56:19,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 20:56:20,048 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 20:56:20,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325516123] [2021-01-06 20:56:20,049 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 20:56:20,049 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-01-06 20:56:20,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859937674] [2021-01-06 20:56:20,050 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 20:56:20,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 20:56:20,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 20:56:20,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-01-06 20:56:20,051 INFO L87 Difference]: Start difference. First operand 11534 states and 16397 transitions. Second operand 6 states. [2021-01-06 20:56:22,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 20:56:22,136 INFO L93 Difference]: Finished difference Result 21712 states and 31026 transitions. [2021-01-06 20:56:22,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 20:56:22,137 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 76 [2021-01-06 20:56:22,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 20:56:22,171 INFO L225 Difference]: With dead ends: 21712 [2021-01-06 20:56:22,172 INFO L226 Difference]: Without dead ends: 19046 [2021-01-06 20:56:22,183 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-01-06 20:56:22,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19046 states. [2021-01-06 20:56:23,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19046 to 14198. [2021-01-06 20:56:23,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14198 states. [2021-01-06 20:56:23,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14198 states to 14198 states and 20181 transitions. [2021-01-06 20:56:23,713 INFO L78 Accepts]: Start accepts. Automaton has 14198 states and 20181 transitions. Word has length 76 [2021-01-06 20:56:23,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 20:56:23,714 INFO L481 AbstractCegarLoop]: Abstraction has 14198 states and 20181 transitions. [2021-01-06 20:56:23,714 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 20:56:23,714 INFO L276 IsEmpty]: Start isEmpty. Operand 14198 states and 20181 transitions. [2021-01-06 20:56:23,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-01-06 20:56:23,717 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 20:56:23,718 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 20:56:23,718 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-01-06 20:56:23,718 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 20:56:23,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 20:56:23,719 INFO L82 PathProgramCache]: Analyzing trace with hash -1414120063, now seen corresponding path program 1 times [2021-01-06 20:56:23,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 20:56:23,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197836424] [2021-01-06 20:56:23,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 20:56:23,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 20:56:23,820 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 20:56:23,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197836424] [2021-01-06 20:56:23,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713476370] [2021-01-06 20:56:23,821 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 [2021-01-06 20:56:23,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 20:56:23,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 20:56:23,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 20:56:24,231 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 20:56:24,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 20:56:24,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2021-01-06 20:56:24,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579982697] [2021-01-06 20:56:24,233 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 20:56:24,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 20:56:24,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 20:56:24,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-01-06 20:56:24,234 INFO L87 Difference]: Start difference. First operand 14198 states and 20181 transitions. Second operand 7 states. [2021-01-06 20:56:27,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 20:56:27,749 INFO L93 Difference]: Finished difference Result 35693 states and 50844 transitions. [2021-01-06 20:56:27,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 20:56:27,750 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 77 [2021-01-06 20:56:27,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 20:56:27,791 INFO L225 Difference]: With dead ends: 35693 [2021-01-06 20:56:27,791 INFO L226 Difference]: Without dead ends: 23723 [2021-01-06 20:56:27,809 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-01-06 20:56:27,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23723 states. [2021-01-06 20:56:30,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23723 to 23526. [2021-01-06 20:56:30,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23526 states. [2021-01-06 20:56:30,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23526 states to 23526 states and 32933 transitions. [2021-01-06 20:56:30,529 INFO L78 Accepts]: Start accepts. Automaton has 23526 states and 32933 transitions. Word has length 77 [2021-01-06 20:56:30,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 20:56:30,529 INFO L481 AbstractCegarLoop]: Abstraction has 23526 states and 32933 transitions. [2021-01-06 20:56:30,529 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 20:56:30,530 INFO L276 IsEmpty]: Start isEmpty. Operand 23526 states and 32933 transitions. [2021-01-06 20:56:30,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-01-06 20:56:30,533 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 20:56:30,533 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 20:56:30,734 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-01-06 20:56:30,738 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 20:56:30,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 20:56:30,738 INFO L82 PathProgramCache]: Analyzing trace with hash -2122663330, now seen corresponding path program 1 times [2021-01-06 20:56:30,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 20:56:30,739 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150631109] [2021-01-06 20:56:30,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 20:56:30,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 20:56:30,975 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 20:56:30,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150631109] [2021-01-06 20:56:30,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604014775] [2021-01-06 20:56:30,976 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 [2021-01-06 20:56:31,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 20:56:31,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 20:56:31,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 20:56:31,364 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 20:56:31,698 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 20:56:31,698 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 20:56:31,698 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-01-06 20:56:31,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689889430] [2021-01-06 20:56:31,699 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 20:56:31,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 20:56:31,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 20:56:31,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-01-06 20:56:31,701 INFO L87 Difference]: Start difference. First operand 23526 states and 32933 transitions. Second operand 17 states. [2021-01-06 20:56:33,647 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2021-01-06 20:56:34,086 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 43 [2021-01-06 20:56:34,325 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 43 [2021-01-06 20:56:34,727 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2021-01-06 20:56:35,537 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2021-01-06 20:56:36,338 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2021-01-06 20:56:36,845 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2021-01-06 20:56:37,494 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2021-01-06 20:56:37,630 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 43 [2021-01-06 20:56:38,059 WARN L197 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2021-01-06 20:56:38,560 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2021-01-06 20:56:38,800 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-01-06 20:56:39,289 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2021-01-06 20:56:39,457 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2021-01-06 20:56:39,988 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 43 [2021-01-06 20:56:40,974 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2021-01-06 20:56:44,146 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2021-01-06 20:56:44,329 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2021-01-06 20:56:44,495 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2021-01-06 20:56:45,001 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 43 [2021-01-06 20:56:47,046 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2021-01-06 20:56:47,641 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 45 [2021-01-06 20:56:48,558 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2021-01-06 20:56:49,340 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2021-01-06 20:56:49,511 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2021-01-06 20:56:50,180 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 43 [2021-01-06 20:56:50,438 WARN L197 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 59 [2021-01-06 20:56:51,875 WARN L197 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2021-01-06 20:56:52,149 WARN L197 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 56 [2021-01-06 20:56:52,383 WARN L197 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2021-01-06 20:56:53,936 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2021-01-06 20:56:54,568 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 41 [2021-01-06 20:56:54,746 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 44 [2021-01-06 20:56:55,543 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 41 [2021-01-06 20:56:55,864 WARN L197 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2021-01-06 20:56:56,755 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2021-01-06 20:56:57,410 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 43 [2021-01-06 20:56:58,160 WARN L197 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2021-01-06 20:56:58,975 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2021-01-06 20:57:00,800 WARN L197 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 30 [2021-01-06 20:57:01,063 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 44 [2021-01-06 20:57:01,338 WARN L197 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2021-01-06 20:57:02,945 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2021-01-06 20:57:43,136 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-01-06 20:57:43,412 WARN L197 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-01-06 20:57:44,977 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 41 [2021-01-06 20:57:45,336 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 41 [2021-01-06 20:57:45,808 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 41 [2021-01-06 20:57:46,012 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2021-01-06 20:57:46,285 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 41 [2021-01-06 20:57:48,270 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 44 [2021-01-06 20:57:48,628 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 36 [2021-01-06 20:57:48,877 WARN L197 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2021-01-06 20:57:49,036 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 35 [2021-01-06 20:57:49,288 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 36 [2021-01-06 20:57:49,563 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 44 [2021-01-06 20:57:49,814 WARN L197 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2021-01-06 20:57:51,955 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-01-06 20:57:52,139 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2021-01-06 20:57:52,443 WARN L197 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 52 [2021-01-06 20:57:52,636 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-01-06 20:57:54,288 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 41 [2021-01-06 20:58:03,373 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 41 [2021-01-06 20:58:04,580 WARN L197 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 44 [2021-01-06 20:58:05,021 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 34 [2021-01-06 20:58:10,078 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-01-06 20:58:11,320 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 41 [2021-01-06 20:58:12,500 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 36 [2021-01-06 20:58:13,744 WARN L197 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2021-01-06 20:58:13,938 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2021-01-06 20:58:14,155 WARN L197 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 41 [2021-01-06 20:58:15,349 WARN L197 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 41 [2021-01-06 20:58:15,641 WARN L197 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 52 [2021-01-06 20:58:15,863 WARN L197 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 44 [2021-01-06 20:58:16,956 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 36 [2021-01-06 20:58:17,325 WARN L197 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2021-01-06 20:58:17,645 WARN L197 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 44 [2021-01-06 20:58:18,946 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-01-06 20:58:19,221 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2021-01-06 20:58:19,639 WARN L197 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 52 [2021-01-06 20:58:20,978 WARN L197 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 44 [2021-01-06 20:58:21,535 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 41 [2021-01-06 20:58:22,927 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2021-01-06 20:58:23,212 WARN L197 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 52 [2021-01-06 20:58:23,652 WARN L197 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 47 [2021-01-06 20:58:24,295 WARN L197 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 44 [2021-01-06 20:58:25,789 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 41 [2021-01-06 20:58:26,033 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2021-01-06 20:58:26,410 WARN L197 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 55 [2021-01-06 20:58:26,749 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 34 [2021-01-06 20:58:27,029 WARN L197 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 47 [2021-01-06 20:58:27,290 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 41 [2021-01-06 20:58:28,489 WARN L197 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 44 [2021-01-06 20:58:28,770 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 36 [2021-01-06 20:58:29,045 WARN L197 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2021-01-06 20:58:35,354 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-01-06 20:58:36,714 WARN L197 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2021-01-06 20:58:36,979 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2021-01-06 20:58:41,579 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 43 [2021-01-06 20:58:41,960 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2021-01-06 20:58:44,081 WARN L197 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2021-01-06 20:58:44,240 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 41 [2021-01-06 20:58:44,649 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 44 [2021-01-06 20:58:45,425 WARN L197 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2021-01-06 20:58:45,761 WARN L197 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2021-01-06 20:58:57,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 20:58:57,167 INFO L93 Difference]: Finished difference Result 649292 states and 889037 transitions. [2021-01-06 20:58:57,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 461 states. [2021-01-06 20:58:57,168 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 78 [2021-01-06 20:58:57,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 20:58:58,766 INFO L225 Difference]: With dead ends: 649292 [2021-01-06 20:58:58,766 INFO L226 Difference]: Without dead ends: 625794 [2021-01-06 20:58:59,062 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 541 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 470 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106232 ImplicationChecksByTransitivity, 48.0s TimeCoverageRelationStatistics Valid=21036, Invalid=201276, Unknown=0, NotChecked=0, Total=222312 [2021-01-06 20:59:00,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625794 states. [2021-01-06 20:59:19,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625794 to 98662. [2021-01-06 20:59:19,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98662 states. [2021-01-06 20:59:19,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98662 states to 98662 states and 136823 transitions. [2021-01-06 20:59:19,594 INFO L78 Accepts]: Start accepts. Automaton has 98662 states and 136823 transitions. Word has length 78 [2021-01-06 20:59:19,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 20:59:19,595 INFO L481 AbstractCegarLoop]: Abstraction has 98662 states and 136823 transitions. [2021-01-06 20:59:19,595 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 20:59:19,595 INFO L276 IsEmpty]: Start isEmpty. Operand 98662 states and 136823 transitions. [2021-01-06 20:59:19,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-01-06 20:59:19,602 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 20:59:19,602 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 20:59:19,815 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-01-06 20:59:19,818 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 20:59:19,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 20:59:19,819 INFO L82 PathProgramCache]: Analyzing trace with hash 635552222, now seen corresponding path program 1 times [2021-01-06 20:59:19,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 20:59:19,820 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499513998] [2021-01-06 20:59:19,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 20:59:19,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 20:59:20,117 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 20:59:20,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499513998] [2021-01-06 20:59:20,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129350719] [2021-01-06 20:59:20,118 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 [2021-01-06 20:59:20,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 20:59:20,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 24 conjunts are in the unsatisfiable core [2021-01-06 20:59:20,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 20:59:20,554 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 20:59:20,763 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 36 [2021-01-06 20:59:20,992 WARN L197 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-01-06 20:59:21,581 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 20:59:21,581 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 20:59:21,581 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 20 [2021-01-06 20:59:21,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130429029] [2021-01-06 20:59:21,585 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 20:59:21,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 20:59:21,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 20:59:21,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2021-01-06 20:59:21,586 INFO L87 Difference]: Start difference. First operand 98662 states and 136823 transitions. Second operand 20 states. [2021-01-06 20:59:22,317 WARN L197 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2021-01-06 20:59:22,610 WARN L197 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2021-01-06 20:59:22,955 WARN L197 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2021-01-06 20:59:23,628 WARN L197 SmtUtils]: Spent 540.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 110 [2021-01-06 20:59:23,945 WARN L197 SmtUtils]: Spent 275.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2021-01-06 20:59:24,675 WARN L197 SmtUtils]: Spent 691.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 113 [2021-01-06 20:59:25,300 WARN L197 SmtUtils]: Spent 562.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 113 [2021-01-06 20:59:26,003 WARN L197 SmtUtils]: Spent 581.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 113 [2021-01-06 20:59:26,382 WARN L197 SmtUtils]: Spent 272.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2021-01-06 20:59:27,133 WARN L197 SmtUtils]: Spent 574.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 107 [2021-01-06 20:59:27,709 WARN L197 SmtUtils]: Spent 535.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 107 [2021-01-06 20:59:27,991 WARN L197 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2021-01-06 20:59:28,331 WARN L197 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2021-01-06 20:59:28,947 WARN L197 SmtUtils]: Spent 498.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 101 [2021-01-06 20:59:29,614 WARN L197 SmtUtils]: Spent 571.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 101 [2021-01-06 20:59:29,981 WARN L197 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2021-01-06 20:59:30,445 WARN L197 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2021-01-06 20:59:31,547 WARN L197 SmtUtils]: Spent 796.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 121 [2021-01-06 20:59:32,344 WARN L197 SmtUtils]: Spent 701.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 109 [2021-01-06 20:59:33,228 WARN L197 SmtUtils]: Spent 799.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 121 [2021-01-06 20:59:33,966 WARN L197 SmtUtils]: Spent 661.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 109 [2021-01-06 20:59:34,399 WARN L197 SmtUtils]: Spent 328.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-01-06 20:59:34,771 WARN L197 SmtUtils]: Spent 283.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2021-01-06 20:59:35,335 WARN L197 SmtUtils]: Spent 366.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2021-01-06 20:59:35,755 WARN L197 SmtUtils]: Spent 334.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2021-01-06 20:59:36,994 WARN L197 SmtUtils]: Spent 340.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2021-01-06 20:59:37,452 WARN L197 SmtUtils]: Spent 393.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2021-01-06 20:59:37,800 WARN L197 SmtUtils]: Spent 290.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2021-01-06 20:59:38,216 WARN L197 SmtUtils]: Spent 328.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2021-01-06 20:59:38,981 WARN L197 SmtUtils]: Spent 324.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2021-01-06 20:59:39,714 WARN L197 SmtUtils]: Spent 692.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 109 [2021-01-06 20:59:40,167 WARN L197 SmtUtils]: Spent 379.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2021-01-06 20:59:40,982 WARN L197 SmtUtils]: Spent 762.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 117 [2021-01-06 20:59:41,334 WARN L197 SmtUtils]: Spent 280.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2021-01-06 20:59:41,998 WARN L197 SmtUtils]: Spent 617.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 97 [2021-01-06 20:59:42,474 WARN L197 SmtUtils]: Spent 411.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2021-01-06 20:59:43,320 WARN L197 SmtUtils]: Spent 758.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 105 [2021-01-06 20:59:43,785 WARN L197 SmtUtils]: Spent 382.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2021-01-06 20:59:44,570 WARN L197 SmtUtils]: Spent 751.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 109 [2021-01-06 20:59:45,091 WARN L197 SmtUtils]: Spent 432.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2021-01-06 20:59:45,995 WARN L197 SmtUtils]: Spent 845.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 117 [2021-01-06 20:59:46,406 WARN L197 SmtUtils]: Spent 343.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2021-01-06 20:59:47,121 WARN L197 SmtUtils]: Spent 662.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 97 [2021-01-06 20:59:47,588 WARN L197 SmtUtils]: Spent 396.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2021-01-06 20:59:48,527 WARN L197 SmtUtils]: Spent 854.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 105 [2021-01-06 20:59:48,951 WARN L197 SmtUtils]: Spent 360.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2021-01-06 20:59:50,095 WARN L197 SmtUtils]: Spent 1.09 s on a formula simplification. DAG size of input: 126 DAG size of output: 118 [2021-01-06 20:59:50,636 WARN L197 SmtUtils]: Spent 469.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2021-01-06 20:59:51,169 WARN L197 SmtUtils]: Spent 438.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2021-01-06 20:59:51,997 WARN L197 SmtUtils]: Spent 768.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 98 [2021-01-06 20:59:52,410 WARN L197 SmtUtils]: Spent 360.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2021-01-06 20:59:52,821 WARN L197 SmtUtils]: Spent 336.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2021-01-06 20:59:53,757 WARN L197 SmtUtils]: Spent 834.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 106 [2021-01-06 20:59:54,289 WARN L197 SmtUtils]: Spent 436.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2021-01-06 20:59:54,835 WARN L197 SmtUtils]: Spent 378.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-01-06 20:59:55,974 WARN L197 SmtUtils]: Spent 986.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 116 [2021-01-06 20:59:57,231 WARN L197 SmtUtils]: Spent 1.17 s on a formula simplification. DAG size of input: 132 DAG size of output: 124 [2021-01-06 20:59:58,360 WARN L197 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 112 DAG size of output: 104 [2021-01-06 20:59:59,445 WARN L197 SmtUtils]: Spent 959.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 112 [2021-01-06 21:00:00,620 WARN L197 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 124 DAG size of output: 116 [2021-01-06 21:00:01,923 WARN L197 SmtUtils]: Spent 1.18 s on a formula simplification. DAG size of input: 132 DAG size of output: 124 [2021-01-06 21:00:02,942 WARN L197 SmtUtils]: Spent 883.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 104 [2021-01-06 21:00:04,109 WARN L197 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 120 DAG size of output: 112