/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/seq-mthreaded/pals_lcr.4_overflow.ufo.UNBOUNDED.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 19:49:13,017 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 19:49:13,021 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 19:49:13,078 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 19:49:13,079 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 19:49:13,083 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 19:49:13,087 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 19:49:13,092 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 19:49:13,096 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 19:49:13,104 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 19:49:13,108 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 19:49:13,110 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 19:49:13,110 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 19:49:13,113 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 19:49:13,116 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 19:49:13,118 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 19:49:13,119 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 19:49:13,124 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 19:49:13,132 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 19:49:13,140 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 19:49:13,142 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 19:49:13,147 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 19:49:13,148 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 19:49:13,150 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 19:49:13,155 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-01-06 19:49:13,155 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-01-06 19:49:13,155 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-01-06 19:49:13,158 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-01-06 19:49:13,158 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-01-06 19:49:13,159 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-01-06 19:49:13,160 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 19:49:13,161 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 19:49:13,163 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 19:49:13,163 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 19:49:13,164 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 19:49:13,165 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 19:49:13,165 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 19:49:13,166 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 19:49:13,166 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 19:49:13,167 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 19:49:13,168 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 19:49:13,169 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 19:49:13,215 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 19:49:13,215 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 19:49:13,217 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 19:49:13,217 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 19:49:13,217 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 19:49:13,218 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 19:49:13,218 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 19:49:13,218 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 19:49:13,218 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 19:49:13,218 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 19:49:13,219 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 19:49:13,219 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 19:49:13,219 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 19:49:13,219 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 19:49:13,220 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 19:49:13,220 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 19:49:13,220 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 19:49:13,220 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 19:49:13,221 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 19:49:13,221 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 19:49:13,221 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 19:49:13,221 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 19:49:13,222 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 19:49:13,222 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 19:49:13,222 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 19:49:13,222 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 19:49:13,600 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 19:49:13,626 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 19:49:13,629 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 19:49:13,630 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 19:49:13,631 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 19:49:13,632 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_lcr.4_overflow.ufo.UNBOUNDED.pals.c [2021-01-06 19:49:13,716 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/87c70143f/dafa061a9b034ac6bc031fcf7a482a24/FLAG1c57aaa09 [2021-01-06 19:49:14,463 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 19:49:14,464 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr.4_overflow.ufo.UNBOUNDED.pals.c [2021-01-06 19:49:14,475 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/87c70143f/dafa061a9b034ac6bc031fcf7a482a24/FLAG1c57aaa09 [2021-01-06 19:49:14,812 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/87c70143f/dafa061a9b034ac6bc031fcf7a482a24 [2021-01-06 19:49:14,816 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 19:49:14,820 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 19:49:14,825 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 19:49:14,825 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 19:49:14,830 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 19:49:14,831 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 07:49:14" (1/1) ... [2021-01-06 19:49:14,834 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58f8a48d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:49:14, skipping insertion in model container [2021-01-06 19:49:14,834 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 07:49:14" (1/1) ... [2021-01-06 19:49:14,843 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 19:49:14,900 INFO L178 MainTranslator]: Built tables and reachable declarations left hand side expression in assignment: lhs: VariableLHS[~m1~0,] left hand side expression in assignment: lhs: VariableLHS[~r1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~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[~st1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode1~0,GLOBAL] 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[~m2~0,] left hand side expression in assignment: lhs: VariableLHS[~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[~st2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode2~0,GLOBAL] 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[~m3~0,] left hand side expression in assignment: lhs: VariableLHS[~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[~st3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode3~0,GLOBAL] 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[~m4~0,] left hand side expression in assignment: lhs: VariableLHS[~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[~st4~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode4~0,GLOBAL] 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[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~1,] left hand side expression in assignment: lhs: VariableLHS[~tmp~1,] left hand side expression in assignment: lhs: VariableLHS[~tmp~1,] left hand side expression in assignment: lhs: VariableLHS[~tmp~1,] left hand side expression in assignment: lhs: VariableLHS[~tmp~1,] left hand side expression in assignment: lhs: VariableLHS[~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[~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[~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[~c1~0,] [2021-01-06 19:49:15,125 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/pals_lcr.4_overflow.ufo.UNBOUNDED.pals.c[8379,8392] [2021-01-06 19:49:15,129 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 19:49:15,141 INFO L203 MainTranslator]: Completed pre-run left hand side expression in assignment: lhs: VariableLHS[~m1~0,] left hand side expression in assignment: lhs: VariableLHS[~r1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~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[~st1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode1~0,GLOBAL] 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[~m2~0,] left hand side expression in assignment: lhs: VariableLHS[~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[~st2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode2~0,GLOBAL] 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[~m3~0,] left hand side expression in assignment: lhs: VariableLHS[~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[~st3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode3~0,GLOBAL] 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[~m4~0,] left hand side expression in assignment: lhs: VariableLHS[~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[~st4~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode4~0,GLOBAL] 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[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~1,] left hand side expression in assignment: lhs: VariableLHS[~tmp~1,] left hand side expression in assignment: lhs: VariableLHS[~tmp~1,] left hand side expression in assignment: lhs: VariableLHS[~tmp~1,] left hand side expression in assignment: lhs: VariableLHS[~tmp~1,] left hand side expression in assignment: lhs: VariableLHS[~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[~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[~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[~c1~0,] [2021-01-06 19:49:15,236 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/pals_lcr.4_overflow.ufo.UNBOUNDED.pals.c[8379,8392] [2021-01-06 19:49:15,237 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 19:49:15,274 INFO L208 MainTranslator]: Completed translation [2021-01-06 19:49:15,274 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:49:15 WrapperNode [2021-01-06 19:49:15,274 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 19:49:15,276 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 19:49:15,276 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 19:49:15,277 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 19:49:15,286 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:49:15" (1/1) ... [2021-01-06 19:49:15,313 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:49:15" (1/1) ... [2021-01-06 19:49:15,376 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 19:49:15,377 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 19:49:15,377 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 19:49:15,378 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 19:49:15,396 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:49:15" (1/1) ... [2021-01-06 19:49:15,396 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:49:15" (1/1) ... [2021-01-06 19:49:15,412 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:49:15" (1/1) ... [2021-01-06 19:49:15,413 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:49:15" (1/1) ... [2021-01-06 19:49:15,430 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:49:15" (1/1) ... [2021-01-06 19:49:15,448 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:49:15" (1/1) ... [2021-01-06 19:49:15,452 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:49:15" (1/1) ... [2021-01-06 19:49:15,460 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 19:49:15,463 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 19:49:15,464 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 19:49:15,464 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 19:49:15,469 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:49:15" (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 19:49:15,582 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 19:49:15,583 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 19:49:15,583 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 19:49:15,583 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 19:49:16,224 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 19:49:16,225 INFO L299 CfgBuilder]: Removed 21 assume(true) statements. [2021-01-06 19:49:16,227 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 07:49:16 BoogieIcfgContainer [2021-01-06 19:49:16,227 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 19:49:16,229 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 19:49:16,229 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 19:49:16,233 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 19:49:16,233 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 07:49:14" (1/3) ... [2021-01-06 19:49:16,234 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@174e6172 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 07:49:16, skipping insertion in model container [2021-01-06 19:49:16,234 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:49:15" (2/3) ... [2021-01-06 19:49:16,235 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@174e6172 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 07:49:16, skipping insertion in model container [2021-01-06 19:49:16,235 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 07:49:16" (3/3) ... [2021-01-06 19:49:16,237 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.4_overflow.ufo.UNBOUNDED.pals.c [2021-01-06 19:49:16,246 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 19:49:16,252 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 19:49:16,275 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 19:49:16,307 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 19:49:16,307 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 19:49:16,307 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 19:49:16,308 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 19:49:16,308 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 19:49:16,308 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 19:49:16,308 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 19:49:16,308 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 19:49:16,326 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states. [2021-01-06 19:49:16,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-01-06 19:49:16,334 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:49:16,335 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] [2021-01-06 19:49:16,336 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:49:16,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:49:16,342 INFO L82 PathProgramCache]: Analyzing trace with hash -1837107710, now seen corresponding path program 1 times [2021-01-06 19:49:16,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:49:16,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538826350] [2021-01-06 19:49:16,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:49:16,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:49:16,571 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 19:49:16,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538826350] [2021-01-06 19:49:16,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 19:49:16,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 19:49:16,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056392164] [2021-01-06 19:49:16,578 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 19:49:16,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:49:16,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 19:49:16,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 19:49:16,596 INFO L87 Difference]: Start difference. First operand 76 states. Second operand 2 states. [2021-01-06 19:49:16,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:49:16,625 INFO L93 Difference]: Finished difference Result 120 states and 199 transitions. [2021-01-06 19:49:16,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 19:49:16,627 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 29 [2021-01-06 19:49:16,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:49:16,639 INFO L225 Difference]: With dead ends: 120 [2021-01-06 19:49:16,639 INFO L226 Difference]: Without dead ends: 72 [2021-01-06 19:49:16,643 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 19:49:16,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-01-06 19:49:16,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2021-01-06 19:49:16,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2021-01-06 19:49:16,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 120 transitions. [2021-01-06 19:49:16,692 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 120 transitions. Word has length 29 [2021-01-06 19:49:16,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:49:16,692 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 120 transitions. [2021-01-06 19:49:16,692 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 19:49:16,693 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 120 transitions. [2021-01-06 19:49:16,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-01-06 19:49:16,694 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:49:16,695 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] [2021-01-06 19:49:16,695 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 19:49:16,695 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:49:16,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:49:16,696 INFO L82 PathProgramCache]: Analyzing trace with hash -1971121216, now seen corresponding path program 1 times [2021-01-06 19:49:16,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:49:16,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695399793] [2021-01-06 19:49:16,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:49:16,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:49:16,833 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 19:49:16,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695399793] [2021-01-06 19:49:16,834 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 19:49:16,834 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 19:49:16,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059308509] [2021-01-06 19:49:16,837 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 19:49:16,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:49:16,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 19:49:16,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-01-06 19:49:16,840 INFO L87 Difference]: Start difference. First operand 72 states and 120 transitions. Second operand 5 states. [2021-01-06 19:49:16,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:49:16,995 INFO L93 Difference]: Finished difference Result 119 states and 192 transitions. [2021-01-06 19:49:16,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 19:49:16,996 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 29 [2021-01-06 19:49:16,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:49:16,999 INFO L225 Difference]: With dead ends: 119 [2021-01-06 19:49:16,999 INFO L226 Difference]: Without dead ends: 72 [2021-01-06 19:49:17,001 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-01-06 19:49:17,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-01-06 19:49:17,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2021-01-06 19:49:17,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2021-01-06 19:49:17,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 97 transitions. [2021-01-06 19:49:17,020 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 97 transitions. Word has length 29 [2021-01-06 19:49:17,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:49:17,021 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 97 transitions. [2021-01-06 19:49:17,021 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 19:49:17,021 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 97 transitions. [2021-01-06 19:49:17,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-01-06 19:49:17,026 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:49:17,026 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 19:49:17,026 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-06 19:49:17,026 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:49:17,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:49:17,029 INFO L82 PathProgramCache]: Analyzing trace with hash 1333293339, now seen corresponding path program 1 times [2021-01-06 19:49:17,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:49:17,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454490995] [2021-01-06 19:49:17,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:49:17,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:49:17,187 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 19:49:17,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454490995] [2021-01-06 19:49:17,188 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 19:49:17,188 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 19:49:17,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13023793] [2021-01-06 19:49:17,189 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 19:49:17,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:49:17,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 19:49:17,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 19:49:17,191 INFO L87 Difference]: Start difference. First operand 72 states and 97 transitions. Second operand 3 states. [2021-01-06 19:49:17,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:49:17,226 INFO L93 Difference]: Finished difference Result 152 states and 223 transitions. [2021-01-06 19:49:17,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 19:49:17,227 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 51 [2021-01-06 19:49:17,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:49:17,232 INFO L225 Difference]: With dead ends: 152 [2021-01-06 19:49:17,232 INFO L226 Difference]: Without dead ends: 109 [2021-01-06 19:49:17,233 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 19:49:17,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-01-06 19:49:17,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 107. [2021-01-06 19:49:17,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2021-01-06 19:49:17,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 153 transitions. [2021-01-06 19:49:17,264 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 153 transitions. Word has length 51 [2021-01-06 19:49:17,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:49:17,266 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 153 transitions. [2021-01-06 19:49:17,266 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 19:49:17,266 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 153 transitions. [2021-01-06 19:49:17,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-01-06 19:49:17,268 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:49:17,268 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 19:49:17,268 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-01-06 19:49:17,269 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:49:17,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:49:17,270 INFO L82 PathProgramCache]: Analyzing trace with hash -606737519, now seen corresponding path program 1 times [2021-01-06 19:49:17,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:49:17,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717349258] [2021-01-06 19:49:17,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:49:17,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:49:17,408 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 19:49:17,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717349258] [2021-01-06 19:49:17,408 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 19:49:17,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 19:49:17,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644230858] [2021-01-06 19:49:17,410 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 19:49:17,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:49:17,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 19:49:17,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 19:49:17,411 INFO L87 Difference]: Start difference. First operand 107 states and 153 transitions. Second operand 3 states. [2021-01-06 19:49:17,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:49:17,438 INFO L93 Difference]: Finished difference Result 251 states and 381 transitions. [2021-01-06 19:49:17,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 19:49:17,439 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 51 [2021-01-06 19:49:17,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:49:17,441 INFO L225 Difference]: With dead ends: 251 [2021-01-06 19:49:17,441 INFO L226 Difference]: Without dead ends: 173 [2021-01-06 19:49:17,442 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 19:49:17,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-01-06 19:49:17,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 171. [2021-01-06 19:49:17,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2021-01-06 19:49:17,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 254 transitions. [2021-01-06 19:49:17,458 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 254 transitions. Word has length 51 [2021-01-06 19:49:17,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:49:17,459 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 254 transitions. [2021-01-06 19:49:17,459 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 19:49:17,459 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 254 transitions. [2021-01-06 19:49:17,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-01-06 19:49:17,460 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:49:17,460 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 19:49:17,461 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-01-06 19:49:17,461 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:49:17,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:49:17,462 INFO L82 PathProgramCache]: Analyzing trace with hash 2093945095, now seen corresponding path program 1 times [2021-01-06 19:49:17,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:49:17,462 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962551659] [2021-01-06 19:49:17,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:49:17,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:49:17,589 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 19:49:17,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962551659] [2021-01-06 19:49:17,590 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 19:49:17,590 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 19:49:17,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386975822] [2021-01-06 19:49:17,590 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 19:49:17,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:49:17,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 19:49:17,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 19:49:17,592 INFO L87 Difference]: Start difference. First operand 171 states and 254 transitions. Second operand 3 states. [2021-01-06 19:49:17,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:49:17,625 INFO L93 Difference]: Finished difference Result 431 states and 664 transitions. [2021-01-06 19:49:17,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 19:49:17,626 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 51 [2021-01-06 19:49:17,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:49:17,628 INFO L225 Difference]: With dead ends: 431 [2021-01-06 19:49:17,628 INFO L226 Difference]: Without dead ends: 289 [2021-01-06 19:49:17,630 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 19:49:17,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2021-01-06 19:49:17,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 287. [2021-01-06 19:49:17,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2021-01-06 19:49:17,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 434 transitions. [2021-01-06 19:49:17,655 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 434 transitions. Word has length 51 [2021-01-06 19:49:17,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:49:17,656 INFO L481 AbstractCegarLoop]: Abstraction has 287 states and 434 transitions. [2021-01-06 19:49:17,656 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 19:49:17,656 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 434 transitions. [2021-01-06 19:49:17,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-01-06 19:49:17,657 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:49:17,657 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 19:49:17,658 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-01-06 19:49:17,658 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:49:17,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:49:17,659 INFO L82 PathProgramCache]: Analyzing trace with hash -1863229059, now seen corresponding path program 1 times [2021-01-06 19:49:17,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:49:17,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336656160] [2021-01-06 19:49:17,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:49:17,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:49:17,776 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 19:49:17,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336656160] [2021-01-06 19:49:17,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 19:49:17,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 19:49:17,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229472618] [2021-01-06 19:49:17,778 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 19:49:17,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:49:17,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 19:49:17,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 19:49:17,779 INFO L87 Difference]: Start difference. First operand 287 states and 434 transitions. Second operand 3 states. [2021-01-06 19:49:17,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:49:17,855 INFO L93 Difference]: Finished difference Result 755 states and 1164 transitions. [2021-01-06 19:49:17,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 19:49:17,856 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 51 [2021-01-06 19:49:17,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:49:17,859 INFO L225 Difference]: With dead ends: 755 [2021-01-06 19:49:17,859 INFO L226 Difference]: Without dead ends: 497 [2021-01-06 19:49:17,861 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 19:49:17,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2021-01-06 19:49:17,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 495. [2021-01-06 19:49:17,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 495 states. [2021-01-06 19:49:17,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 750 transitions. [2021-01-06 19:49:17,894 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 750 transitions. Word has length 51 [2021-01-06 19:49:17,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:49:17,895 INFO L481 AbstractCegarLoop]: Abstraction has 495 states and 750 transitions. [2021-01-06 19:49:17,895 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 19:49:17,895 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 750 transitions. [2021-01-06 19:49:17,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-01-06 19:49:17,896 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:49:17,896 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 19:49:17,896 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-01-06 19:49:17,897 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:49:17,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:49:17,897 INFO L82 PathProgramCache]: Analyzing trace with hash -645243661, now seen corresponding path program 1 times [2021-01-06 19:49:17,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:49:17,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59215329] [2021-01-06 19:49:17,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:49:17,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:49:17,973 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 19:49:17,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59215329] [2021-01-06 19:49:17,974 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 19:49:17,974 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-01-06 19:49:17,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208801536] [2021-01-06 19:49:17,975 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 19:49:17,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:49:17,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 19:49:17,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-01-06 19:49:17,976 INFO L87 Difference]: Start difference. First operand 495 states and 750 transitions. Second operand 6 states. [2021-01-06 19:49:18,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:49:18,362 INFO L93 Difference]: Finished difference Result 4223 states and 6518 transitions. [2021-01-06 19:49:18,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 19:49:18,363 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 51 [2021-01-06 19:49:18,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:49:18,384 INFO L225 Difference]: With dead ends: 4223 [2021-01-06 19:49:18,385 INFO L226 Difference]: Without dead ends: 3757 [2021-01-06 19:49:18,388 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-01-06 19:49:18,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3757 states. [2021-01-06 19:49:18,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3757 to 959. [2021-01-06 19:49:18,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 959 states. [2021-01-06 19:49:18,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 959 states to 959 states and 1438 transitions. [2021-01-06 19:49:18,484 INFO L78 Accepts]: Start accepts. Automaton has 959 states and 1438 transitions. Word has length 51 [2021-01-06 19:49:18,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:49:18,485 INFO L481 AbstractCegarLoop]: Abstraction has 959 states and 1438 transitions. [2021-01-06 19:49:18,485 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 19:49:18,485 INFO L276 IsEmpty]: Start isEmpty. Operand 959 states and 1438 transitions. [2021-01-06 19:49:18,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-06 19:49:18,486 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:49:18,487 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 19:49:18,487 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-01-06 19:49:18,487 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:49:18,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:49:18,488 INFO L82 PathProgramCache]: Analyzing trace with hash 1275401347, now seen corresponding path program 1 times [2021-01-06 19:49:18,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:49:18,488 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871050767] [2021-01-06 19:49:18,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:49:18,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:49:18,565 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 19:49:18,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871050767] [2021-01-06 19:49:18,566 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 19:49:18,567 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 19:49:18,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851151167] [2021-01-06 19:49:18,567 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 19:49:18,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:49:18,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 19:49:18,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 19:49:18,569 INFO L87 Difference]: Start difference. First operand 959 states and 1438 transitions. Second operand 3 states. [2021-01-06 19:49:18,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:49:18,680 INFO L93 Difference]: Finished difference Result 2317 states and 3490 transitions. [2021-01-06 19:49:18,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 19:49:18,681 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 53 [2021-01-06 19:49:18,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:49:18,690 INFO L225 Difference]: With dead ends: 2317 [2021-01-06 19:49:18,690 INFO L226 Difference]: Without dead ends: 1387 [2021-01-06 19:49:18,692 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 19:49:18,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1387 states. [2021-01-06 19:49:18,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1387 to 1385. [2021-01-06 19:49:18,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1385 states. [2021-01-06 19:49:18,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1385 states to 1385 states and 2056 transitions. [2021-01-06 19:49:18,788 INFO L78 Accepts]: Start accepts. Automaton has 1385 states and 2056 transitions. Word has length 53 [2021-01-06 19:49:18,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:49:18,789 INFO L481 AbstractCegarLoop]: Abstraction has 1385 states and 2056 transitions. [2021-01-06 19:49:18,789 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 19:49:18,789 INFO L276 IsEmpty]: Start isEmpty. Operand 1385 states and 2056 transitions. [2021-01-06 19:49:18,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-06 19:49:18,793 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:49:18,793 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 19:49:18,794 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-01-06 19:49:18,794 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:49:18,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:49:18,794 INFO L82 PathProgramCache]: Analyzing trace with hash 1341894859, now seen corresponding path program 1 times [2021-01-06 19:49:18,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:49:18,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767861749] [2021-01-06 19:49:18,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:49:18,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:49:18,981 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 19:49:18,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767861749] [2021-01-06 19:49:18,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 19:49:18,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-01-06 19:49:18,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924615506] [2021-01-06 19:49:18,983 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 19:49:18,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:49:18,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 19:49:18,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-01-06 19:49:18,984 INFO L87 Difference]: Start difference. First operand 1385 states and 2056 transitions. Second operand 6 states. [2021-01-06 19:49:19,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:49:19,173 INFO L93 Difference]: Finished difference Result 2741 states and 4082 transitions. [2021-01-06 19:49:19,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 19:49:19,173 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 53 [2021-01-06 19:49:19,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:49:19,181 INFO L225 Difference]: With dead ends: 2741 [2021-01-06 19:49:19,181 INFO L226 Difference]: Without dead ends: 1387 [2021-01-06 19:49:19,183 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-01-06 19:49:19,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1387 states. [2021-01-06 19:49:19,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1387 to 1385. [2021-01-06 19:49:19,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1385 states. [2021-01-06 19:49:19,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1385 states to 1385 states and 2032 transitions. [2021-01-06 19:49:19,298 INFO L78 Accepts]: Start accepts. Automaton has 1385 states and 2032 transitions. Word has length 53 [2021-01-06 19:49:19,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:49:19,298 INFO L481 AbstractCegarLoop]: Abstraction has 1385 states and 2032 transitions. [2021-01-06 19:49:19,299 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 19:49:19,299 INFO L276 IsEmpty]: Start isEmpty. Operand 1385 states and 2032 transitions. [2021-01-06 19:49:19,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-01-06 19:49:19,300 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:49:19,300 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 19:49:19,300 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-01-06 19:49:19,300 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:49:19,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:49:19,301 INFO L82 PathProgramCache]: Analyzing trace with hash -1765655459, now seen corresponding path program 1 times [2021-01-06 19:49:19,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:49:19,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122529059] [2021-01-06 19:49:19,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:49:19,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:49:19,388 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 19:49:19,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122529059] [2021-01-06 19:49:19,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 19:49:19,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-01-06 19:49:19,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810831152] [2021-01-06 19:49:19,390 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 19:49:19,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:49:19,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 19:49:19,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-01-06 19:49:19,391 INFO L87 Difference]: Start difference. First operand 1385 states and 2032 transitions. Second operand 8 states. [2021-01-06 19:49:19,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:49:19,672 INFO L93 Difference]: Finished difference Result 2584 states and 3737 transitions. [2021-01-06 19:49:19,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 19:49:19,673 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 54 [2021-01-06 19:49:19,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:49:19,686 INFO L225 Difference]: With dead ends: 2584 [2021-01-06 19:49:19,687 INFO L226 Difference]: Without dead ends: 2582 [2021-01-06 19:49:19,688 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-01-06 19:49:19,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2582 states. [2021-01-06 19:49:19,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2582 to 1481. [2021-01-06 19:49:19,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1481 states. [2021-01-06 19:49:19,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1481 states to 1481 states and 2120 transitions. [2021-01-06 19:49:19,838 INFO L78 Accepts]: Start accepts. Automaton has 1481 states and 2120 transitions. Word has length 54 [2021-01-06 19:49:19,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:49:19,838 INFO L481 AbstractCegarLoop]: Abstraction has 1481 states and 2120 transitions. [2021-01-06 19:49:19,838 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 19:49:19,838 INFO L276 IsEmpty]: Start isEmpty. Operand 1481 states and 2120 transitions. [2021-01-06 19:49:19,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-01-06 19:49:19,842 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:49:19,842 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 19:49:19,842 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-01-06 19:49:19,842 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:49:19,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:49:19,843 INFO L82 PathProgramCache]: Analyzing trace with hash -45947538, now seen corresponding path program 1 times [2021-01-06 19:49:19,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:49:19,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708143730] [2021-01-06 19:49:19,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:49:19,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:49:19,960 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-01-06 19:49:19,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708143730] [2021-01-06 19:49:19,961 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 19:49:19,961 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-01-06 19:49:19,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645130680] [2021-01-06 19:49:19,962 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 19:49:19,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:49:19,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 19:49:19,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-01-06 19:49:19,963 INFO L87 Difference]: Start difference. First operand 1481 states and 2120 transitions. Second operand 6 states. [2021-01-06 19:49:20,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:49:20,530 INFO L93 Difference]: Finished difference Result 7587 states and 10889 transitions. [2021-01-06 19:49:20,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 19:49:20,530 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 77 [2021-01-06 19:49:20,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:49:20,564 INFO L225 Difference]: With dead ends: 7587 [2021-01-06 19:49:20,564 INFO L226 Difference]: Without dead ends: 6137 [2021-01-06 19:49:20,569 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-01-06 19:49:20,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6137 states. [2021-01-06 19:49:20,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6137 to 2929. [2021-01-06 19:49:20,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2929 states. [2021-01-06 19:49:20,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2929 states to 2929 states and 4184 transitions. [2021-01-06 19:49:20,880 INFO L78 Accepts]: Start accepts. Automaton has 2929 states and 4184 transitions. Word has length 77 [2021-01-06 19:49:20,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:49:20,880 INFO L481 AbstractCegarLoop]: Abstraction has 2929 states and 4184 transitions. [2021-01-06 19:49:20,881 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 19:49:20,881 INFO L276 IsEmpty]: Start isEmpty. Operand 2929 states and 4184 transitions. [2021-01-06 19:49:20,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-01-06 19:49:20,889 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:49:20,889 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 19:49:20,889 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-01-06 19:49:20,890 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:49:20,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:49:20,895 INFO L82 PathProgramCache]: Analyzing trace with hash -1814730354, now seen corresponding path program 1 times [2021-01-06 19:49:20,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:49:20,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230786429] [2021-01-06 19:49:20,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:49:20,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:49:20,987 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-01-06 19:49:20,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230786429] [2021-01-06 19:49:20,988 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 19:49:20,988 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-01-06 19:49:20,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817270261] [2021-01-06 19:49:20,989 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 19:49:20,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:49:20,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 19:49:20,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-01-06 19:49:20,990 INFO L87 Difference]: Start difference. First operand 2929 states and 4184 transitions. Second operand 6 states. [2021-01-06 19:49:21,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:49:21,561 INFO L93 Difference]: Finished difference Result 9035 states and 12953 transitions. [2021-01-06 19:49:21,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 19:49:21,561 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 77 [2021-01-06 19:49:21,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:49:21,597 INFO L225 Difference]: With dead ends: 9035 [2021-01-06 19:49:21,598 INFO L226 Difference]: Without dead ends: 7585 [2021-01-06 19:49:21,601 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-01-06 19:49:21,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7585 states. [2021-01-06 19:49:22,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7585 to 5105. [2021-01-06 19:49:22,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5105 states. [2021-01-06 19:49:22,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5105 states to 5105 states and 7260 transitions. [2021-01-06 19:49:22,052 INFO L78 Accepts]: Start accepts. Automaton has 5105 states and 7260 transitions. Word has length 77 [2021-01-06 19:49:22,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:49:22,052 INFO L481 AbstractCegarLoop]: Abstraction has 5105 states and 7260 transitions. [2021-01-06 19:49:22,052 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 19:49:22,053 INFO L276 IsEmpty]: Start isEmpty. Operand 5105 states and 7260 transitions. [2021-01-06 19:49:22,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-01-06 19:49:22,055 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:49:22,056 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 19:49:22,056 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-01-06 19:49:22,056 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:49:22,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:49:22,057 INFO L82 PathProgramCache]: Analyzing trace with hash -683090514, now seen corresponding path program 1 times [2021-01-06 19:49:22,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:49:22,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796301178] [2021-01-06 19:49:22,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:49:22,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:49:22,157 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 19:49:22,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796301178] [2021-01-06 19:49:22,158 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 19:49:22,159 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-01-06 19:49:22,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802578287] [2021-01-06 19:49:22,159 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 19:49:22,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:49:22,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 19:49:22,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-01-06 19:49:22,161 INFO L87 Difference]: Start difference. First operand 5105 states and 7260 transitions. Second operand 6 states. [2021-01-06 19:49:22,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:49:22,883 INFO L93 Difference]: Finished difference Result 10483 states and 15017 transitions. [2021-01-06 19:49:22,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 19:49:22,884 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 77 [2021-01-06 19:49:22,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:49:22,932 INFO L225 Difference]: With dead ends: 10483 [2021-01-06 19:49:22,933 INFO L226 Difference]: Without dead ends: 9033 [2021-01-06 19:49:22,943 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-01-06 19:49:22,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9033 states. [2021-01-06 19:49:23,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9033 to 6553. [2021-01-06 19:49:23,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6553 states. [2021-01-06 19:49:23,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6553 states to 6553 states and 9324 transitions. [2021-01-06 19:49:23,563 INFO L78 Accepts]: Start accepts. Automaton has 6553 states and 9324 transitions. Word has length 77 [2021-01-06 19:49:23,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:49:23,564 INFO L481 AbstractCegarLoop]: Abstraction has 6553 states and 9324 transitions. [2021-01-06 19:49:23,564 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 19:49:23,564 INFO L276 IsEmpty]: Start isEmpty. Operand 6553 states and 9324 transitions. [2021-01-06 19:49:23,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-01-06 19:49:23,567 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:49:23,567 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 19:49:23,568 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-01-06 19:49:23,568 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:49:23,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:49:23,568 INFO L82 PathProgramCache]: Analyzing trace with hash -1918549554, now seen corresponding path program 1 times [2021-01-06 19:49:23,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:49:23,569 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790923941] [2021-01-06 19:49:23,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:49:23,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:49:23,649 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 19:49:23,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790923941] [2021-01-06 19:49:23,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 19:49:23,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-01-06 19:49:23,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815278371] [2021-01-06 19:49:23,651 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 19:49:23,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:49:23,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 19:49:23,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-01-06 19:49:23,652 INFO L87 Difference]: Start difference. First operand 6553 states and 9324 transitions. Second operand 6 states. [2021-01-06 19:49:24,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:49:24,433 INFO L93 Difference]: Finished difference Result 11083 states and 15881 transitions. [2021-01-06 19:49:24,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 19:49:24,434 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 77 [2021-01-06 19:49:24,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:49:24,461 INFO L225 Difference]: With dead ends: 11083 [2021-01-06 19:49:24,462 INFO L226 Difference]: Without dead ends: 10057 [2021-01-06 19:49:24,468 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-01-06 19:49:24,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10057 states. [2021-01-06 19:49:25,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10057 to 7577. [2021-01-06 19:49:25,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7577 states. [2021-01-06 19:49:25,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7577 states to 7577 states and 10796 transitions. [2021-01-06 19:49:25,161 INFO L78 Accepts]: Start accepts. Automaton has 7577 states and 10796 transitions. Word has length 77 [2021-01-06 19:49:25,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:49:25,162 INFO L481 AbstractCegarLoop]: Abstraction has 7577 states and 10796 transitions. [2021-01-06 19:49:25,162 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 19:49:25,162 INFO L276 IsEmpty]: Start isEmpty. Operand 7577 states and 10796 transitions. [2021-01-06 19:49:25,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-01-06 19:49:25,165 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:49:25,165 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:49:25,165 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-01-06 19:49:25,166 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:49:25,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:49:25,166 INFO L82 PathProgramCache]: Analyzing trace with hash 118065963, now seen corresponding path program 1 times [2021-01-06 19:49:25,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:49:25,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797499891] [2021-01-06 19:49:25,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:49:25,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:49:25,403 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 19:49:25,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797499891] [2021-01-06 19:49:25,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103204900] [2021-01-06 19:49:25,405 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 19:49:25,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:49:25,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 19:49:25,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:49:25,860 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 19:49:25,861 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:49:25,861 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4] total 12 [2021-01-06 19:49:25,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361292230] [2021-01-06 19:49:25,862 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 19:49:25,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:49:25,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 19:49:25,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-01-06 19:49:25,863 INFO L87 Difference]: Start difference. First operand 7577 states and 10796 transitions. Second operand 12 states. [2021-01-06 19:49:31,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:49:31,303 INFO L93 Difference]: Finished difference Result 45575 states and 64563 transitions. [2021-01-06 19:49:31,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-01-06 19:49:31,304 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 78 [2021-01-06 19:49:31,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:49:31,407 INFO L225 Difference]: With dead ends: 45575 [2021-01-06 19:49:31,407 INFO L226 Difference]: Without dead ends: 39941 [2021-01-06 19:49:31,429 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=440, Invalid=1816, Unknown=0, NotChecked=0, Total=2256 [2021-01-06 19:49:31,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39941 states. [2021-01-06 19:49:33,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39941 to 25985. [2021-01-06 19:49:33,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25985 states. [2021-01-06 19:49:33,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25985 states to 25985 states and 36460 transitions. [2021-01-06 19:49:33,731 INFO L78 Accepts]: Start accepts. Automaton has 25985 states and 36460 transitions. Word has length 78 [2021-01-06 19:49:33,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:49:33,732 INFO L481 AbstractCegarLoop]: Abstraction has 25985 states and 36460 transitions. [2021-01-06 19:49:33,732 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 19:49:33,732 INFO L276 IsEmpty]: Start isEmpty. Operand 25985 states and 36460 transitions. [2021-01-06 19:49:33,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-01-06 19:49:33,736 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:49:33,737 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:49:33,952 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-01-06 19:49:33,953 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:49:33,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:49:33,955 INFO L82 PathProgramCache]: Analyzing trace with hash 1760611046, now seen corresponding path program 1 times [2021-01-06 19:49:33,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:49:33,955 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147347701] [2021-01-06 19:49:33,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:49:33,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:49:34,176 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 19:49:34,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147347701] [2021-01-06 19:49:34,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891424690] [2021-01-06 19:49:34,177 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 19:49:34,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:49:34,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 19:49:34,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:49:34,490 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 19:49:35,039 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 19:49:35,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:49:35,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-01-06 19:49:35,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88534953] [2021-01-06 19:49:35,041 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 19:49:35,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:49:35,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 19:49:35,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-01-06 19:49:35,042 INFO L87 Difference]: Start difference. First operand 25985 states and 36460 transitions. Second operand 17 states. [2021-01-06 19:49:47,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:49:47,199 INFO L93 Difference]: Finished difference Result 163251 states and 226806 transitions. [2021-01-06 19:49:47,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-01-06 19:49:47,200 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 79 [2021-01-06 19:49:47,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:49:47,810 INFO L225 Difference]: With dead ends: 163251 [2021-01-06 19:49:47,810 INFO L226 Difference]: Without dead ends: 137297 [2021-01-06 19:49:48,031 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=615, Invalid=1737, Unknown=0, NotChecked=0, Total=2352 [2021-01-06 19:49:48,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137297 states. [2021-01-06 19:49:54,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137297 to 62377. [2021-01-06 19:49:54,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62377 states. [2021-01-06 19:49:54,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62377 states to 62377 states and 87195 transitions. [2021-01-06 19:49:54,715 INFO L78 Accepts]: Start accepts. Automaton has 62377 states and 87195 transitions. Word has length 79 [2021-01-06 19:49:54,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:49:54,715 INFO L481 AbstractCegarLoop]: Abstraction has 62377 states and 87195 transitions. [2021-01-06 19:49:54,716 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 19:49:54,716 INFO L276 IsEmpty]: Start isEmpty. Operand 62377 states and 87195 transitions. [2021-01-06 19:49:54,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-01-06 19:49:54,721 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:49:54,722 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, 1, 1] [2021-01-06 19:49:54,922 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-01-06 19:49:54,923 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:49:54,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:49:54,924 INFO L82 PathProgramCache]: Analyzing trace with hash -261362024, now seen corresponding path program 1 times [2021-01-06 19:49:54,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:49:54,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802470398] [2021-01-06 19:49:54,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:49:54,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:49:55,184 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 19:49:55,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802470398] [2021-01-06 19:49:55,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446263677] [2021-01-06 19:49:55,185 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 19:49:55,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:49:55,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 25 conjunts are in the unsatisfiable core [2021-01-06 19:49:55,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:49:56,119 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 19:49:56,139 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 19:49:56,336 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 19:49:56,647 INFO L757 QuantifierPusher]: Run 20 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 19:49:56,996 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 46 disjuncts [2021-01-06 19:49:57,313 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 19:49:58,499 INFO L757 QuantifierPusher]: Run 20 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 19:50:00,012 INFO L757 QuantifierPusher]: Run 30 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 19:50:01,848 INFO L757 QuantifierPusher]: Run 40 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 19:50:03,987 INFO L757 QuantifierPusher]: Run 50 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 19:50:06,766 INFO L757 QuantifierPusher]: Run 60 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 19:50:10,032 INFO L757 QuantifierPusher]: Run 70 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 19:50:13,469 INFO L757 QuantifierPusher]: Run 80 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 19:50:17,296 INFO L757 QuantifierPusher]: Run 90 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 19:50:22,231 INFO L757 QuantifierPusher]: Run 100 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 19:50:28,449 INFO L757 QuantifierPusher]: Run 110 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 19:50:35,436 INFO L757 QuantifierPusher]: Run 120 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 19:50:43,016 INFO L757 QuantifierPusher]: Run 130 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 19:50:51,649 INFO L757 QuantifierPusher]: Run 140 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 19:51:02,519 INFO L757 QuantifierPusher]: Run 150 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 19:51:14,251 INFO L757 QuantifierPusher]: Run 160 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 19:51:26,556 INFO L757 QuantifierPusher]: Run 170 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 19:51:41,383 INFO L757 QuantifierPusher]: Run 180 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 19:51:57,637 INFO L757 QuantifierPusher]: Run 190 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 19:52:15,887 INFO L757 QuantifierPusher]: Run 200 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 19:52:35,108 INFO L757 QuantifierPusher]: Run 210 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 19:52:55,885 INFO L757 QuantifierPusher]: Run 220 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 19:53:18,841 INFO L757 QuantifierPusher]: Run 230 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug.