/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.3.1.ufo.BOUNDED-6.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 09:54:09,997 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 09:54:10,001 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 09:54:10,057 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 09:54:10,057 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 09:54:10,061 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 09:54:10,065 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 09:54:10,070 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 09:54:10,073 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 09:54:10,079 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 09:54:10,083 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 09:54:10,085 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 09:54:10,085 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 09:54:10,088 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 09:54:10,090 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 09:54:10,091 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 09:54:10,092 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 09:54:10,096 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 09:54:10,102 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 09:54:10,111 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 09:54:10,112 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 09:54:10,114 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 09:54:10,115 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 09:54:10,116 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 09:54:10,119 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-23 09:54:10,119 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-23 09:54:10,119 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-23 09:54:10,120 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-23 09:54:10,121 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-23 09:54:10,122 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-23 09:54:10,122 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 09:54:10,123 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 09:54:10,124 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 09:54:10,139 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 09:54:10,141 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 09:54:10,141 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 09:54:10,142 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 09:54:10,142 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 09:54:10,142 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 09:54:10,143 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 09:54:10,144 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 09:54:10,145 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 09:54:10,171 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 09:54:10,171 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 09:54:10,173 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 09:54:10,173 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 09:54:10,174 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 09:54:10,174 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 09:54:10,174 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 09:54:10,174 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 09:54:10,175 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 09:54:10,175 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 09:54:10,175 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 09:54:10,175 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 09:54:10,175 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 09:54:10,176 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 09:54:10,176 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 09:54:10,176 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 09:54:10,176 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 09:54:10,176 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 09:54:10,177 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 09:54:10,177 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 09:54:10,177 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 09:54:10,177 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 09:54:10,178 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 09:54:10,178 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 09:54:10,178 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 09:54:10,178 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 09:54:10,543 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 09:54:10,577 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 09:54:10,580 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 09:54:10,582 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 09:54:10,583 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 09:54:10,584 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_lcr.3.1.ufo.BOUNDED-6.pals.c [2020-12-23 09:54:10,678 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/5924779b1/bf7e3f78e7e5452e97b3a3e1e166f584/FLAG93dd0b9c0 [2020-12-23 09:54:11,253 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 09:54:11,254 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr.3.1.ufo.BOUNDED-6.pals.c [2020-12-23 09:54:11,267 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/5924779b1/bf7e3f78e7e5452e97b3a3e1e166f584/FLAG93dd0b9c0 [2020-12-23 09:54:11,594 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/5924779b1/bf7e3f78e7e5452e97b3a3e1e166f584 [2020-12-23 09:54:11,598 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 09:54:11,601 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 09:54:11,604 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 09:54:11,604 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 09:54:11,611 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 09:54:11,613 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 09:54:11" (1/1) ... [2020-12-23 09:54:11,614 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62b3918b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:54:11, skipping insertion in model container [2020-12-23 09:54:11,614 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 09:54:11" (1/1) ... [2020-12-23 09:54:11,629 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 09:54:11,696 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[~p3_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[~send1~0,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[~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[~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[~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[~c1~0,] [2020-12-23 09:54:12,065 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.3.1.ufo.BOUNDED-6.pals.c[5984,5997] [2020-12-23 09:54:12,069 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 09:54:12,096 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[~p3_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[~send1~0,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[~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[~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[~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[~c1~0,] [2020-12-23 09:54:12,192 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.3.1.ufo.BOUNDED-6.pals.c[5984,5997] [2020-12-23 09:54:12,197 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 09:54:12,223 INFO L208 MainTranslator]: Completed translation [2020-12-23 09:54:12,224 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:54:12 WrapperNode [2020-12-23 09:54:12,224 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 09:54:12,226 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 09:54:12,227 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 09:54:12,227 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 09:54:12,237 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:54:12" (1/1) ... [2020-12-23 09:54:12,267 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:54:12" (1/1) ... [2020-12-23 09:54:12,329 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 09:54:12,333 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 09:54:12,334 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 09:54:12,334 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 09:54:12,347 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:54:12" (1/1) ... [2020-12-23 09:54:12,348 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:54:12" (1/1) ... [2020-12-23 09:54:12,363 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:54:12" (1/1) ... [2020-12-23 09:54:12,368 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:54:12" (1/1) ... [2020-12-23 09:54:12,383 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:54:12" (1/1) ... [2020-12-23 09:54:12,401 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:54:12" (1/1) ... [2020-12-23 09:54:12,403 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:54:12" (1/1) ... [2020-12-23 09:54:12,412 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 09:54:12,413 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 09:54:12,413 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 09:54:12,413 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 09:54:12,414 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:54:12" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 09:54:12,536 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 09:54:12,536 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 09:54:12,536 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 09:54:12,536 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 09:54:13,206 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 09:54:13,207 INFO L299 CfgBuilder]: Removed 17 assume(true) statements. [2020-12-23 09:54:13,209 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 09:54:13 BoogieIcfgContainer [2020-12-23 09:54:13,209 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 09:54:13,213 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 09:54:13,215 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 09:54:13,219 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 09:54:13,220 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 09:54:11" (1/3) ... [2020-12-23 09:54:13,222 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b26e95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 09:54:13, skipping insertion in model container [2020-12-23 09:54:13,222 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:54:12" (2/3) ... [2020-12-23 09:54:13,223 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b26e95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 09:54:13, skipping insertion in model container [2020-12-23 09:54:13,223 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 09:54:13" (3/3) ... [2020-12-23 09:54:13,225 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.1.ufo.BOUNDED-6.pals.c [2020-12-23 09:54:13,236 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 09:54:13,243 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 09:54:13,265 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 09:54:13,308 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 09:54:13,308 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 09:54:13,308 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 09:54:13,309 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 09:54:13,309 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 09:54:13,309 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 09:54:13,309 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 09:54:13,309 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 09:54:13,330 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states. [2020-12-23 09:54:13,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-23 09:54:13,339 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:54:13,340 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:54:13,340 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:54:13,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:54:13,348 INFO L82 PathProgramCache]: Analyzing trace with hash 1133243219, now seen corresponding path program 1 times [2020-12-23 09:54:13,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:54:13,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381960697] [2020-12-23 09:54:13,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:54:13,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:54:13,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:54:13,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381960697] [2020-12-23 09:54:13,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:54:13,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 09:54:13,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382383160] [2020-12-23 09:54:13,655 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 09:54:13,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:54:13,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 09:54:13,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 09:54:13,672 INFO L87 Difference]: Start difference. First operand 62 states. Second operand 2 states. [2020-12-23 09:54:13,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:54:13,697 INFO L93 Difference]: Finished difference Result 103 states and 164 transitions. [2020-12-23 09:54:13,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 09:54:13,701 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 25 [2020-12-23 09:54:13,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:54:13,712 INFO L225 Difference]: With dead ends: 103 [2020-12-23 09:54:13,712 INFO L226 Difference]: Without dead ends: 58 [2020-12-23 09:54:13,716 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 09:54:13,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-12-23 09:54:13,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-12-23 09:54:13,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-12-23 09:54:13,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 94 transitions. [2020-12-23 09:54:13,758 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 94 transitions. Word has length 25 [2020-12-23 09:54:13,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:54:13,758 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 94 transitions. [2020-12-23 09:54:13,758 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 09:54:13,759 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 94 transitions. [2020-12-23 09:54:13,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-23 09:54:13,760 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:54:13,760 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] [2020-12-23 09:54:13,761 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 09:54:13,761 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:54:13,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:54:13,762 INFO L82 PathProgramCache]: Analyzing trace with hash 315594769, now seen corresponding path program 1 times [2020-12-23 09:54:13,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:54:13,762 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912042481] [2020-12-23 09:54:13,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:54:13,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:54:13,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:54:13,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912042481] [2020-12-23 09:54:13,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:54:13,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 09:54:13,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096300675] [2020-12-23 09:54:13,857 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 09:54:13,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:54:13,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 09:54:13,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-23 09:54:13,858 INFO L87 Difference]: Start difference. First operand 58 states and 94 transitions. Second operand 5 states. [2020-12-23 09:54:13,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:54:13,978 INFO L93 Difference]: Finished difference Result 134 states and 210 transitions. [2020-12-23 09:54:13,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 09:54:13,979 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2020-12-23 09:54:13,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:54:13,981 INFO L225 Difference]: With dead ends: 134 [2020-12-23 09:54:13,981 INFO L226 Difference]: Without dead ends: 94 [2020-12-23 09:54:13,983 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-23 09:54:13,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-12-23 09:54:13,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 58. [2020-12-23 09:54:13,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-12-23 09:54:13,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 78 transitions. [2020-12-23 09:54:13,993 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 78 transitions. Word has length 25 [2020-12-23 09:54:13,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:54:13,993 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 78 transitions. [2020-12-23 09:54:13,993 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 09:54:13,994 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 78 transitions. [2020-12-23 09:54:13,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-23 09:54:13,995 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:54:13,996 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:54:13,996 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 09:54:13,996 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:54:13,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:54:13,997 INFO L82 PathProgramCache]: Analyzing trace with hash -278543826, now seen corresponding path program 1 times [2020-12-23 09:54:13,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:54:13,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198855918] [2020-12-23 09:54:13,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:54:14,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:54:14,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:54:14,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198855918] [2020-12-23 09:54:14,107 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:54:14,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 09:54:14,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751614937] [2020-12-23 09:54:14,110 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 09:54:14,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:54:14,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 09:54:14,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:54:14,116 INFO L87 Difference]: Start difference. First operand 58 states and 78 transitions. Second operand 3 states. [2020-12-23 09:54:14,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:54:14,172 INFO L93 Difference]: Finished difference Result 124 states and 180 transitions. [2020-12-23 09:54:14,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 09:54:14,176 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 40 [2020-12-23 09:54:14,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:54:14,178 INFO L225 Difference]: With dead ends: 124 [2020-12-23 09:54:14,178 INFO L226 Difference]: Without dead ends: 88 [2020-12-23 09:54:14,179 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:54:14,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-12-23 09:54:14,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 86. [2020-12-23 09:54:14,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-12-23 09:54:14,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 122 transitions. [2020-12-23 09:54:14,205 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 122 transitions. Word has length 40 [2020-12-23 09:54:14,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:54:14,206 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 122 transitions. [2020-12-23 09:54:14,206 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 09:54:14,206 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 122 transitions. [2020-12-23 09:54:14,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-23 09:54:14,214 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:54:14,214 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:54:14,214 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-23 09:54:14,215 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:54:14,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:54:14,216 INFO L82 PathProgramCache]: Analyzing trace with hash 1401070434, now seen corresponding path program 1 times [2020-12-23 09:54:14,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:54:14,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983997486] [2020-12-23 09:54:14,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:54:14,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:54:14,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:54:14,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983997486] [2020-12-23 09:54:14,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:54:14,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 09:54:14,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265967569] [2020-12-23 09:54:14,338 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 09:54:14,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:54:14,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 09:54:14,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:54:14,340 INFO L87 Difference]: Start difference. First operand 86 states and 122 transitions. Second operand 3 states. [2020-12-23 09:54:14,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:54:14,372 INFO L93 Difference]: Finished difference Result 202 states and 302 transitions. [2020-12-23 09:54:14,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 09:54:14,373 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 40 [2020-12-23 09:54:14,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:54:14,375 INFO L225 Difference]: With dead ends: 202 [2020-12-23 09:54:14,376 INFO L226 Difference]: Without dead ends: 138 [2020-12-23 09:54:14,377 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:54:14,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-12-23 09:54:14,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 136. [2020-12-23 09:54:14,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-12-23 09:54:14,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 199 transitions. [2020-12-23 09:54:14,403 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 199 transitions. Word has length 40 [2020-12-23 09:54:14,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:54:14,404 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 199 transitions. [2020-12-23 09:54:14,404 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 09:54:14,404 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 199 transitions. [2020-12-23 09:54:14,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-23 09:54:14,406 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:54:14,406 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:54:14,406 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-23 09:54:14,406 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:54:14,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:54:14,407 INFO L82 PathProgramCache]: Analyzing trace with hash 1738863576, now seen corresponding path program 1 times [2020-12-23 09:54:14,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:54:14,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586002846] [2020-12-23 09:54:14,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:54:14,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:54:14,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:54:14,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586002846] [2020-12-23 09:54:14,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:54:14,506 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 09:54:14,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109919030] [2020-12-23 09:54:14,507 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 09:54:14,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:54:14,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 09:54:14,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:54:14,508 INFO L87 Difference]: Start difference. First operand 136 states and 199 transitions. Second operand 3 states. [2020-12-23 09:54:14,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:54:14,550 INFO L93 Difference]: Finished difference Result 340 states and 513 transitions. [2020-12-23 09:54:14,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 09:54:14,552 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 40 [2020-12-23 09:54:14,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:54:14,559 INFO L225 Difference]: With dead ends: 340 [2020-12-23 09:54:14,560 INFO L226 Difference]: Without dead ends: 226 [2020-12-23 09:54:14,562 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:54:14,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-12-23 09:54:14,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 224. [2020-12-23 09:54:14,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2020-12-23 09:54:14,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 331 transitions. [2020-12-23 09:54:14,618 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 331 transitions. Word has length 40 [2020-12-23 09:54:14,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:54:14,619 INFO L481 AbstractCegarLoop]: Abstraction has 224 states and 331 transitions. [2020-12-23 09:54:14,619 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 09:54:14,619 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 331 transitions. [2020-12-23 09:54:14,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-23 09:54:14,620 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:54:14,622 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:54:14,622 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-23 09:54:14,622 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:54:14,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:54:14,623 INFO L82 PathProgramCache]: Analyzing trace with hash -1338118322, now seen corresponding path program 1 times [2020-12-23 09:54:14,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:54:14,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963019046] [2020-12-23 09:54:14,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:54:14,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:54:14,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:54:14,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963019046] [2020-12-23 09:54:14,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:54:14,772 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 09:54:14,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178907823] [2020-12-23 09:54:14,772 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 09:54:14,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:54:14,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 09:54:14,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-23 09:54:14,774 INFO L87 Difference]: Start difference. First operand 224 states and 331 transitions. Second operand 6 states. [2020-12-23 09:54:15,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:54:15,053 INFO L93 Difference]: Finished difference Result 676 states and 1017 transitions. [2020-12-23 09:54:15,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 09:54:15,053 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 40 [2020-12-23 09:54:15,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:54:15,057 INFO L225 Difference]: With dead ends: 676 [2020-12-23 09:54:15,057 INFO L226 Difference]: Without dead ends: 474 [2020-12-23 09:54:15,061 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-23 09:54:15,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2020-12-23 09:54:15,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 424. [2020-12-23 09:54:15,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 424 states. [2020-12-23 09:54:15,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 635 transitions. [2020-12-23 09:54:15,146 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 635 transitions. Word has length 40 [2020-12-23 09:54:15,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:54:15,146 INFO L481 AbstractCegarLoop]: Abstraction has 424 states and 635 transitions. [2020-12-23 09:54:15,146 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 09:54:15,146 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 635 transitions. [2020-12-23 09:54:15,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-23 09:54:15,149 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:54:15,149 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:54:15,150 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-23 09:54:15,150 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:54:15,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:54:15,150 INFO L82 PathProgramCache]: Analyzing trace with hash -317049968, now seen corresponding path program 1 times [2020-12-23 09:54:15,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:54:15,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844582150] [2020-12-23 09:54:15,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:54:15,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:54:15,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:54:15,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844582150] [2020-12-23 09:54:15,320 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:54:15,320 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 09:54:15,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640007081] [2020-12-23 09:54:15,321 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 09:54:15,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:54:15,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 09:54:15,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 09:54:15,323 INFO L87 Difference]: Start difference. First operand 424 states and 635 transitions. Second operand 5 states. [2020-12-23 09:54:15,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:54:15,598 INFO L93 Difference]: Finished difference Result 2434 states and 3700 transitions. [2020-12-23 09:54:15,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 09:54:15,599 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 40 [2020-12-23 09:54:15,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:54:15,612 INFO L225 Difference]: With dead ends: 2434 [2020-12-23 09:54:15,612 INFO L226 Difference]: Without dead ends: 2032 [2020-12-23 09:54:15,614 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-23 09:54:15,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2032 states. [2020-12-23 09:54:15,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2032 to 824. [2020-12-23 09:54:15,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 824 states. [2020-12-23 09:54:15,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 824 states to 824 states and 1215 transitions. [2020-12-23 09:54:15,708 INFO L78 Accepts]: Start accepts. Automaton has 824 states and 1215 transitions. Word has length 40 [2020-12-23 09:54:15,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:54:15,708 INFO L481 AbstractCegarLoop]: Abstraction has 824 states and 1215 transitions. [2020-12-23 09:54:15,708 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 09:54:15,709 INFO L276 IsEmpty]: Start isEmpty. Operand 824 states and 1215 transitions. [2020-12-23 09:54:15,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-23 09:54:15,709 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:54:15,710 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:54:15,710 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-23 09:54:15,710 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:54:15,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:54:15,711 INFO L82 PathProgramCache]: Analyzing trace with hash -1091548472, now seen corresponding path program 1 times [2020-12-23 09:54:15,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:54:15,711 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254232221] [2020-12-23 09:54:15,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:54:15,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:54:15,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:54:15,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254232221] [2020-12-23 09:54:15,897 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:54:15,898 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 09:54:15,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494045774] [2020-12-23 09:54:15,898 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 09:54:15,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:54:15,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 09:54:15,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 09:54:15,900 INFO L87 Difference]: Start difference. First operand 824 states and 1215 transitions. Second operand 5 states. [2020-12-23 09:54:16,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:54:16,039 INFO L93 Difference]: Finished difference Result 2030 states and 3022 transitions. [2020-12-23 09:54:16,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 09:54:16,040 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 42 [2020-12-23 09:54:16,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:54:16,047 INFO L225 Difference]: With dead ends: 2030 [2020-12-23 09:54:16,048 INFO L226 Difference]: Without dead ends: 1228 [2020-12-23 09:54:16,050 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 09:54:16,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1228 states. [2020-12-23 09:54:16,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1228 to 824. [2020-12-23 09:54:16,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 824 states. [2020-12-23 09:54:16,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 824 states to 824 states and 1199 transitions. [2020-12-23 09:54:16,146 INFO L78 Accepts]: Start accepts. Automaton has 824 states and 1199 transitions. Word has length 42 [2020-12-23 09:54:16,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:54:16,146 INFO L481 AbstractCegarLoop]: Abstraction has 824 states and 1199 transitions. [2020-12-23 09:54:16,146 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 09:54:16,147 INFO L276 IsEmpty]: Start isEmpty. Operand 824 states and 1199 transitions. [2020-12-23 09:54:16,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-23 09:54:16,147 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:54:16,148 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:54:16,148 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-23 09:54:16,148 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:54:16,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:54:16,149 INFO L82 PathProgramCache]: Analyzing trace with hash -1158041984, now seen corresponding path program 1 times [2020-12-23 09:54:16,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:54:16,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267333962] [2020-12-23 09:54:16,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:54:16,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:54:16,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:54:16,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267333962] [2020-12-23 09:54:16,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:54:16,196 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 09:54:16,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503362448] [2020-12-23 09:54:16,197 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 09:54:16,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:54:16,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 09:54:16,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:54:16,198 INFO L87 Difference]: Start difference. First operand 824 states and 1199 transitions. Second operand 3 states. [2020-12-23 09:54:16,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:54:16,290 INFO L93 Difference]: Finished difference Result 1810 states and 2635 transitions. [2020-12-23 09:54:16,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 09:54:16,290 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 42 [2020-12-23 09:54:16,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:54:16,296 INFO L225 Difference]: With dead ends: 1810 [2020-12-23 09:54:16,296 INFO L226 Difference]: Without dead ends: 1008 [2020-12-23 09:54:16,298 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:54:16,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1008 states. [2020-12-23 09:54:16,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1008 to 1006. [2020-12-23 09:54:16,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1006 states. [2020-12-23 09:54:16,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1006 states to 1006 states and 1445 transitions. [2020-12-23 09:54:16,382 INFO L78 Accepts]: Start accepts. Automaton has 1006 states and 1445 transitions. Word has length 42 [2020-12-23 09:54:16,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:54:16,383 INFO L481 AbstractCegarLoop]: Abstraction has 1006 states and 1445 transitions. [2020-12-23 09:54:16,383 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 09:54:16,383 INFO L276 IsEmpty]: Start isEmpty. Operand 1006 states and 1445 transitions. [2020-12-23 09:54:16,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-23 09:54:16,384 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:54:16,384 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:54:16,384 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-23 09:54:16,385 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:54:16,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:54:16,385 INFO L82 PathProgramCache]: Analyzing trace with hash 107012533, now seen corresponding path program 1 times [2020-12-23 09:54:16,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:54:16,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634143489] [2020-12-23 09:54:16,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:54:16,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:54:16,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:54:16,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634143489] [2020-12-23 09:54:16,461 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:54:16,461 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 09:54:16,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383520935] [2020-12-23 09:54:16,462 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 09:54:16,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:54:16,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 09:54:16,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-23 09:54:16,463 INFO L87 Difference]: Start difference. First operand 1006 states and 1445 transitions. Second operand 5 states. [2020-12-23 09:54:16,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:54:16,699 INFO L93 Difference]: Finished difference Result 1993 states and 2820 transitions. [2020-12-23 09:54:16,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 09:54:16,700 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 43 [2020-12-23 09:54:16,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:54:16,712 INFO L225 Difference]: With dead ends: 1993 [2020-12-23 09:54:16,712 INFO L226 Difference]: Without dead ends: 1991 [2020-12-23 09:54:16,713 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-23 09:54:16,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1991 states. [2020-12-23 09:54:16,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1991 to 1102. [2020-12-23 09:54:16,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1102 states. [2020-12-23 09:54:16,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1102 states to 1102 states and 1537 transitions. [2020-12-23 09:54:16,828 INFO L78 Accepts]: Start accepts. Automaton has 1102 states and 1537 transitions. Word has length 43 [2020-12-23 09:54:16,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:54:16,829 INFO L481 AbstractCegarLoop]: Abstraction has 1102 states and 1537 transitions. [2020-12-23 09:54:16,829 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 09:54:16,829 INFO L276 IsEmpty]: Start isEmpty. Operand 1102 states and 1537 transitions. [2020-12-23 09:54:16,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-23 09:54:16,831 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:54:16,831 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:54:16,832 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-23 09:54:16,832 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:54:16,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:54:16,832 INFO L82 PathProgramCache]: Analyzing trace with hash -1027002802, now seen corresponding path program 1 times [2020-12-23 09:54:16,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:54:16,833 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940286020] [2020-12-23 09:54:16,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:54:16,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:54:16,904 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 09:54:16,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940286020] [2020-12-23 09:54:16,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:54:16,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 09:54:16,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67426086] [2020-12-23 09:54:16,907 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 09:54:16,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:54:16,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 09:54:16,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 09:54:16,910 INFO L87 Difference]: Start difference. First operand 1102 states and 1537 transitions. Second operand 5 states. [2020-12-23 09:54:17,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:54:17,302 INFO L93 Difference]: Finished difference Result 4698 states and 6565 transitions. [2020-12-23 09:54:17,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 09:54:17,302 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 63 [2020-12-23 09:54:17,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:54:17,322 INFO L225 Difference]: With dead ends: 4698 [2020-12-23 09:54:17,322 INFO L226 Difference]: Without dead ends: 3620 [2020-12-23 09:54:17,328 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-23 09:54:17,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3620 states. [2020-12-23 09:54:17,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3620 to 2178. [2020-12-23 09:54:17,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2178 states. [2020-12-23 09:54:17,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2178 states to 2178 states and 3029 transitions. [2020-12-23 09:54:17,552 INFO L78 Accepts]: Start accepts. Automaton has 2178 states and 3029 transitions. Word has length 63 [2020-12-23 09:54:17,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:54:17,553 INFO L481 AbstractCegarLoop]: Abstraction has 2178 states and 3029 transitions. [2020-12-23 09:54:17,553 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 09:54:17,553 INFO L276 IsEmpty]: Start isEmpty. Operand 2178 states and 3029 transitions. [2020-12-23 09:54:17,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-23 09:54:17,555 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:54:17,555 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:54:17,555 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-23 09:54:17,555 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:54:17,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:54:17,556 INFO L82 PathProgramCache]: Analyzing trace with hash 1499181678, now seen corresponding path program 1 times [2020-12-23 09:54:17,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:54:17,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127853777] [2020-12-23 09:54:17,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:54:17,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:54:17,703 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 09:54:17,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127853777] [2020-12-23 09:54:17,704 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:54:17,704 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 09:54:17,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518872324] [2020-12-23 09:54:17,705 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 09:54:17,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:54:17,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 09:54:17,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 09:54:17,706 INFO L87 Difference]: Start difference. First operand 2178 states and 3029 transitions. Second operand 5 states. [2020-12-23 09:54:18,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:54:18,146 INFO L93 Difference]: Finished difference Result 5774 states and 8057 transitions. [2020-12-23 09:54:18,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 09:54:18,147 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 63 [2020-12-23 09:54:18,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:54:18,170 INFO L225 Difference]: With dead ends: 5774 [2020-12-23 09:54:18,171 INFO L226 Difference]: Without dead ends: 4696 [2020-12-23 09:54:18,173 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 09:54:18,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4696 states. [2020-12-23 09:54:18,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4696 to 3794. [2020-12-23 09:54:18,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3794 states. [2020-12-23 09:54:18,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3794 states to 3794 states and 5249 transitions. [2020-12-23 09:54:18,517 INFO L78 Accepts]: Start accepts. Automaton has 3794 states and 5249 transitions. Word has length 63 [2020-12-23 09:54:18,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:54:18,518 INFO L481 AbstractCegarLoop]: Abstraction has 3794 states and 5249 transitions. [2020-12-23 09:54:18,518 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 09:54:18,518 INFO L276 IsEmpty]: Start isEmpty. Operand 3794 states and 5249 transitions. [2020-12-23 09:54:18,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-23 09:54:18,520 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:54:18,520 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:54:18,520 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-23 09:54:18,520 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:54:18,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:54:18,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1664145778, now seen corresponding path program 1 times [2020-12-23 09:54:18,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:54:18,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868211842] [2020-12-23 09:54:18,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:54:18,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:54:18,650 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 09:54:18,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868211842] [2020-12-23 09:54:18,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:54:18,651 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 09:54:18,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865230069] [2020-12-23 09:54:18,651 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 09:54:18,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:54:18,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 09:54:18,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 09:54:18,652 INFO L87 Difference]: Start difference. First operand 3794 states and 5249 transitions. Second operand 5 states. [2020-12-23 09:54:19,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:54:19,131 INFO L93 Difference]: Finished difference Result 6670 states and 9309 transitions. [2020-12-23 09:54:19,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 09:54:19,132 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 63 [2020-12-23 09:54:19,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:54:19,159 INFO L225 Difference]: With dead ends: 6670 [2020-12-23 09:54:19,159 INFO L226 Difference]: Without dead ends: 5772 [2020-12-23 09:54:19,162 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 09:54:19,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5772 states. [2020-12-23 09:54:19,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5772 to 4690. [2020-12-23 09:54:19,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4690 states. [2020-12-23 09:54:19,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4690 states to 4690 states and 6505 transitions. [2020-12-23 09:54:19,588 INFO L78 Accepts]: Start accepts. Automaton has 4690 states and 6505 transitions. Word has length 63 [2020-12-23 09:54:19,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:54:19,588 INFO L481 AbstractCegarLoop]: Abstraction has 4690 states and 6505 transitions. [2020-12-23 09:54:19,588 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 09:54:19,588 INFO L276 IsEmpty]: Start isEmpty. Operand 4690 states and 6505 transitions. [2020-12-23 09:54:19,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-23 09:54:19,591 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:54:19,591 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:54:19,591 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-23 09:54:19,591 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:54:19,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:54:19,592 INFO L82 PathProgramCache]: Analyzing trace with hash -229876224, now seen corresponding path program 1 times [2020-12-23 09:54:19,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:54:19,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498943712] [2020-12-23 09:54:19,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:54:19,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:54:19,717 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 09:54:19,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498943712] [2020-12-23 09:54:19,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254625457] [2020-12-23 09:54:19,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:54:19,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:54:19,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 09:54:19,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:54:20,039 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 09:54:20,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:54:20,041 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 7 [2020-12-23 09:54:20,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252707230] [2020-12-23 09:54:20,042 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 09:54:20,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:54:20,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 09:54:20,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-12-23 09:54:20,044 INFO L87 Difference]: Start difference. First operand 4690 states and 6505 transitions. Second operand 7 states. [2020-12-23 09:54:20,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:54:20,879 INFO L93 Difference]: Finished difference Result 11621 states and 16185 transitions. [2020-12-23 09:54:20,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 09:54:20,880 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 64 [2020-12-23 09:54:20,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:54:20,929 INFO L225 Difference]: With dead ends: 11621 [2020-12-23 09:54:20,929 INFO L226 Difference]: Without dead ends: 7587 [2020-12-23 09:54:20,937 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-12-23 09:54:20,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7587 states. [2020-12-23 09:54:21,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7587 to 7538. [2020-12-23 09:54:21,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7538 states. [2020-12-23 09:54:21,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7538 states to 7538 states and 10277 transitions. [2020-12-23 09:54:21,677 INFO L78 Accepts]: Start accepts. Automaton has 7538 states and 10277 transitions. Word has length 64 [2020-12-23 09:54:21,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:54:21,677 INFO L481 AbstractCegarLoop]: Abstraction has 7538 states and 10277 transitions. [2020-12-23 09:54:21,678 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 09:54:21,678 INFO L276 IsEmpty]: Start isEmpty. Operand 7538 states and 10277 transitions. [2020-12-23 09:54:21,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-23 09:54:21,679 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:54:21,680 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] [2020-12-23 09:54:21,894 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-23 09:54:21,896 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:54:21,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:54:21,897 INFO L82 PathProgramCache]: Analyzing trace with hash -456421882, now seen corresponding path program 1 times [2020-12-23 09:54:21,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:54:21,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59456059] [2020-12-23 09:54:21,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:54:21,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:54:22,110 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:54:22,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59456059] [2020-12-23 09:54:22,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769599762] [2020-12-23 09:54:22,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:54:22,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:54:22,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-23 09:54:22,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:54:22,427 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 09:54:22,760 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:54:22,760 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:54:22,761 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-23 09:54:22,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821740567] [2020-12-23 09:54:22,764 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 09:54:22,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:54:22,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 09:54:22,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2020-12-23 09:54:22,767 INFO L87 Difference]: Start difference. First operand 7538 states and 10277 transitions. Second operand 17 states. [2020-12-23 09:54:22,899 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-12-23 09:54:25,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:54:25,930 INFO L93 Difference]: Finished difference Result 24813 states and 33558 transitions. [2020-12-23 09:54:25,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-23 09:54:25,931 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 65 [2020-12-23 09:54:25,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:54:25,973 INFO L225 Difference]: With dead ends: 24813 [2020-12-23 09:54:25,973 INFO L226 Difference]: Without dead ends: 17299 [2020-12-23 09:54:25,989 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=434, Invalid=1206, Unknown=0, NotChecked=0, Total=1640 [2020-12-23 09:54:26,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17299 states. [2020-12-23 09:54:26,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17299 to 11114. [2020-12-23 09:54:26,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11114 states. [2020-12-23 09:54:27,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11114 states to 11114 states and 15005 transitions. [2020-12-23 09:54:27,028 INFO L78 Accepts]: Start accepts. Automaton has 11114 states and 15005 transitions. Word has length 65 [2020-12-23 09:54:27,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:54:27,028 INFO L481 AbstractCegarLoop]: Abstraction has 11114 states and 15005 transitions. [2020-12-23 09:54:27,028 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 09:54:27,029 INFO L276 IsEmpty]: Start isEmpty. Operand 11114 states and 15005 transitions. [2020-12-23 09:54:27,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-23 09:54:27,031 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:54:27,031 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] [2020-12-23 09:54:27,244 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-23 09:54:27,245 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:54:27,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:54:27,247 INFO L82 PathProgramCache]: Analyzing trace with hash 550341158, now seen corresponding path program 1 times [2020-12-23 09:54:27,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:54:27,247 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55323438] [2020-12-23 09:54:27,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:54:27,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:54:27,465 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:54:27,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55323438] [2020-12-23 09:54:27,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2425689] [2020-12-23 09:54:27,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:54:27,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:54:27,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-23 09:54:27,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:54:27,810 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 09:54:28,221 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:54:28,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:54:28,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-23 09:54:28,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287718600] [2020-12-23 09:54:28,223 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 09:54:28,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:54:28,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 09:54:28,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2020-12-23 09:54:28,224 INFO L87 Difference]: Start difference. First operand 11114 states and 15005 transitions. Second operand 17 states. [2020-12-23 09:54:31,584 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 59 [2020-12-23 09:54:31,994 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 56 [2020-12-23 09:54:32,850 WARN L197 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 59 [2020-12-23 09:54:37,680 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-12-23 09:54:44,589 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-12-23 09:54:45,831 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-12-23 09:54:47,283 WARN L197 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2020-12-23 09:54:47,637 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-12-23 09:54:48,693 WARN L197 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2020-12-23 09:54:54,800 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 45 [2020-12-23 09:54:55,292 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2020-12-23 09:54:55,531 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 45 [2020-12-23 09:54:59,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:54:59,891 INFO L93 Difference]: Finished difference Result 208295 states and 278042 transitions. [2020-12-23 09:54:59,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 205 states. [2020-12-23 09:54:59,892 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 65 [2020-12-23 09:54:59,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:55:00,583 INFO L225 Difference]: With dead ends: 208295 [2020-12-23 09:55:00,583 INFO L226 Difference]: Without dead ends: 197205 [2020-12-23 09:55:00,674 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 217 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20542 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=5056, Invalid=42686, Unknown=0, NotChecked=0, Total=47742 [2020-12-23 09:55:01,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197205 states. [2020-12-23 09:55:07,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197205 to 58813. [2020-12-23 09:55:07,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58813 states. [2020-12-23 09:55:07,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58813 states to 58813 states and 79207 transitions. [2020-12-23 09:55:07,555 INFO L78 Accepts]: Start accepts. Automaton has 58813 states and 79207 transitions. Word has length 65 [2020-12-23 09:55:07,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:55:07,556 INFO L481 AbstractCegarLoop]: Abstraction has 58813 states and 79207 transitions. [2020-12-23 09:55:07,556 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 09:55:07,556 INFO L276 IsEmpty]: Start isEmpty. Operand 58813 states and 79207 transitions. [2020-12-23 09:55:07,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-23 09:55:07,560 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:55:07,560 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] [2020-12-23 09:55:07,761 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-23 09:55:07,762 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:55:07,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:55:07,763 INFO L82 PathProgramCache]: Analyzing trace with hash 625513838, now seen corresponding path program 1 times [2020-12-23 09:55:07,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:55:07,764 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33662718] [2020-12-23 09:55:07,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:55:07,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:55:07,813 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:55:07,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33662718] [2020-12-23 09:55:07,814 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:55:07,814 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 09:55:07,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464915231] [2020-12-23 09:55:07,814 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 09:55:07,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:55:07,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 09:55:07,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:55:07,815 INFO L87 Difference]: Start difference. First operand 58813 states and 79207 transitions. Second operand 3 states. [2020-12-23 09:55:12,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:55:12,653 INFO L93 Difference]: Finished difference Result 117604 states and 158391 transitions. [2020-12-23 09:55:12,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 09:55:12,653 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 65 [2020-12-23 09:55:12,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:55:12,775 INFO L225 Difference]: With dead ends: 117604 [2020-12-23 09:55:12,776 INFO L226 Difference]: Without dead ends: 58815 [2020-12-23 09:55:12,854 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:55:12,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58815 states. [2020-12-23 09:55:18,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58815 to 57541. [2020-12-23 09:55:18,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57541 states. [2020-12-23 09:55:18,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57541 states to 57541 states and 76027 transitions. [2020-12-23 09:55:18,204 INFO L78 Accepts]: Start accepts. Automaton has 57541 states and 76027 transitions. Word has length 65 [2020-12-23 09:55:18,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:55:18,204 INFO L481 AbstractCegarLoop]: Abstraction has 57541 states and 76027 transitions. [2020-12-23 09:55:18,204 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 09:55:18,204 INFO L276 IsEmpty]: Start isEmpty. Operand 57541 states and 76027 transitions. [2020-12-23 09:55:18,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-23 09:55:18,207 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:55:18,207 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] [2020-12-23 09:55:18,208 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-23 09:55:18,208 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:55:18,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:55:18,208 INFO L82 PathProgramCache]: Analyzing trace with hash -621993778, now seen corresponding path program 1 times [2020-12-23 09:55:18,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:55:18,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627629132] [2020-12-23 09:55:18,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:55:18,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:55:18,260 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:55:18,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627629132] [2020-12-23 09:55:18,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:55:18,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 09:55:18,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462108693] [2020-12-23 09:55:18,262 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 09:55:18,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:55:18,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 09:55:18,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:55:18,264 INFO L87 Difference]: Start difference. First operand 57541 states and 76027 transitions. Second operand 3 states. [2020-12-23 09:55:21,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:55:21,039 INFO L93 Difference]: Finished difference Result 89986 states and 118783 transitions. [2020-12-23 09:55:21,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 09:55:21,040 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 65 [2020-12-23 09:55:21,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:55:21,075 INFO L225 Difference]: With dead ends: 89986 [2020-12-23 09:55:21,075 INFO L226 Difference]: Without dead ends: 32469 [2020-12-23 09:55:21,104 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:55:21,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32469 states. [2020-12-23 09:55:23,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32469 to 32467. [2020-12-23 09:55:23,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32467 states. [2020-12-23 09:55:23,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32467 states to 32467 states and 41927 transitions. [2020-12-23 09:55:23,868 INFO L78 Accepts]: Start accepts. Automaton has 32467 states and 41927 transitions. Word has length 65 [2020-12-23 09:55:23,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:55:23,868 INFO L481 AbstractCegarLoop]: Abstraction has 32467 states and 41927 transitions. [2020-12-23 09:55:23,869 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 09:55:23,869 INFO L276 IsEmpty]: Start isEmpty. Operand 32467 states and 41927 transitions. [2020-12-23 09:55:23,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-23 09:55:23,871 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:55:23,871 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] [2020-12-23 09:55:23,871 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-23 09:55:23,871 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:55:23,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:55:23,872 INFO L82 PathProgramCache]: Analyzing trace with hash -1642879954, now seen corresponding path program 1 times [2020-12-23 09:55:23,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:55:23,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314124588] [2020-12-23 09:55:23,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:55:23,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:55:23,933 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:55:23,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314124588] [2020-12-23 09:55:23,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:55:23,938 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 09:55:23,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483493807] [2020-12-23 09:55:23,939 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 09:55:23,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:55:23,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 09:55:23,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:55:23,941 INFO L87 Difference]: Start difference. First operand 32467 states and 41927 transitions. Second operand 3 states. [2020-12-23 09:55:25,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:55:25,146 INFO L93 Difference]: Finished difference Result 45562 states and 58892 transitions. [2020-12-23 09:55:25,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 09:55:25,147 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 65 [2020-12-23 09:55:25,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:55:25,163 INFO L225 Difference]: With dead ends: 45562 [2020-12-23 09:55:25,164 INFO L226 Difference]: Without dead ends: 13119 [2020-12-23 09:55:25,183 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:55:25,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13119 states. [2020-12-23 09:55:26,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13119 to 12223. [2020-12-23 09:55:26,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12223 states. [2020-12-23 09:55:26,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12223 states to 12223 states and 15637 transitions. [2020-12-23 09:55:26,194 INFO L78 Accepts]: Start accepts. Automaton has 12223 states and 15637 transitions. Word has length 65 [2020-12-23 09:55:26,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:55:26,194 INFO L481 AbstractCegarLoop]: Abstraction has 12223 states and 15637 transitions. [2020-12-23 09:55:26,194 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 09:55:26,194 INFO L276 IsEmpty]: Start isEmpty. Operand 12223 states and 15637 transitions. [2020-12-23 09:55:26,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-23 09:55:26,201 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:55:26,202 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:55:26,202 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-23 09:55:26,202 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:55:26,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:55:26,203 INFO L82 PathProgramCache]: Analyzing trace with hash 224764346, now seen corresponding path program 1 times [2020-12-23 09:55:26,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:55:26,204 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061167372] [2020-12-23 09:55:26,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:55:26,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:55:26,285 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-23 09:55:26,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061167372] [2020-12-23 09:55:26,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:55:26,286 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 09:55:26,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748566345] [2020-12-23 09:55:26,287 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 09:55:26,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:55:26,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 09:55:26,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-23 09:55:26,288 INFO L87 Difference]: Start difference. First operand 12223 states and 15637 transitions. Second operand 6 states. [2020-12-23 09:55:27,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:55:27,063 INFO L93 Difference]: Finished difference Result 20403 states and 26243 transitions. [2020-12-23 09:55:27,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 09:55:27,065 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 65 [2020-12-23 09:55:27,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:55:27,076 INFO L225 Difference]: With dead ends: 20403 [2020-12-23 09:55:27,076 INFO L226 Difference]: Without dead ends: 8243 [2020-12-23 09:55:27,083 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-23 09:55:27,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8243 states. [2020-12-23 09:55:27,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8243 to 8243. [2020-12-23 09:55:27,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8243 states. [2020-12-23 09:55:27,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8243 states to 8243 states and 10468 transitions. [2020-12-23 09:55:27,685 INFO L78 Accepts]: Start accepts. Automaton has 8243 states and 10468 transitions. Word has length 65 [2020-12-23 09:55:27,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:55:27,686 INFO L481 AbstractCegarLoop]: Abstraction has 8243 states and 10468 transitions. [2020-12-23 09:55:27,686 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 09:55:27,686 INFO L276 IsEmpty]: Start isEmpty. Operand 8243 states and 10468 transitions. [2020-12-23 09:55:27,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-23 09:55:27,687 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:55:27,687 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:55:27,687 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-23 09:55:27,687 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:55:27,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:55:27,688 INFO L82 PathProgramCache]: Analyzing trace with hash 67059962, now seen corresponding path program 1 times [2020-12-23 09:55:27,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:55:27,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021077243] [2020-12-23 09:55:27,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:55:27,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:55:27,850 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-23 09:55:27,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021077243] [2020-12-23 09:55:27,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:55:27,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-23 09:55:27,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330972904] [2020-12-23 09:55:27,852 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 09:55:27,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:55:27,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 09:55:27,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-23 09:55:27,853 INFO L87 Difference]: Start difference. First operand 8243 states and 10468 transitions. Second operand 7 states. [2020-12-23 09:55:28,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:55:28,570 INFO L93 Difference]: Finished difference Result 15342 states and 19574 transitions. [2020-12-23 09:55:28,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 09:55:28,571 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 65 [2020-12-23 09:55:28,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:55:28,578 INFO L225 Difference]: With dead ends: 15342 [2020-12-23 09:55:28,578 INFO L226 Difference]: Without dead ends: 7210 [2020-12-23 09:55:28,584 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2020-12-23 09:55:28,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7210 states. [2020-12-23 09:55:29,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7210 to 7208. [2020-12-23 09:55:29,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7208 states. [2020-12-23 09:55:29,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7208 states to 7208 states and 9149 transitions. [2020-12-23 09:55:29,213 INFO L78 Accepts]: Start accepts. Automaton has 7208 states and 9149 transitions. Word has length 65 [2020-12-23 09:55:29,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:55:29,213 INFO L481 AbstractCegarLoop]: Abstraction has 7208 states and 9149 transitions. [2020-12-23 09:55:29,213 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 09:55:29,213 INFO L276 IsEmpty]: Start isEmpty. Operand 7208 states and 9149 transitions. [2020-12-23 09:55:29,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-23 09:55:29,214 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:55:29,214 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:55:29,214 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-23 09:55:29,214 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:55:29,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:55:29,214 INFO L82 PathProgramCache]: Analyzing trace with hash -1467200301, now seen corresponding path program 1 times [2020-12-23 09:55:29,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:55:29,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13636769] [2020-12-23 09:55:29,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:55:29,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:55:30,226 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:55:30,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13636769] [2020-12-23 09:55:30,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143637841] [2020-12-23 09:55:30,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:55:30,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:55:30,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-23 09:55:30,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:55:30,786 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 09:55:31,538 WARN L197 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 46 [2020-12-23 09:55:32,264 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2020-12-23 09:55:32,331 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:55:32,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:55:32,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 12] total 33 [2020-12-23 09:55:32,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589706643] [2020-12-23 09:55:32,332 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-23 09:55:32,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:55:32,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-23 09:55:32,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=979, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 09:55:32,334 INFO L87 Difference]: Start difference. First operand 7208 states and 9149 transitions. Second operand 33 states. [2020-12-23 09:55:32,755 WARN L197 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 81 [2020-12-23 09:55:34,115 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 33 [2020-12-23 09:55:34,320 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2020-12-23 09:55:34,589 WARN L197 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 61 [2020-12-23 09:55:34,863 WARN L197 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 58 [2020-12-23 09:55:35,260 WARN L197 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 72 [2020-12-23 09:55:35,840 WARN L197 SmtUtils]: Spent 471.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 97 [2020-12-23 09:55:36,306 WARN L197 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 80 [2020-12-23 09:55:36,823 WARN L197 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 80 [2020-12-23 09:55:37,263 WARN L197 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 63 [2020-12-23 09:55:37,728 WARN L197 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 87 [2020-12-23 09:55:38,039 WARN L197 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2020-12-23 09:55:38,395 WARN L197 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 77 [2020-12-23 09:55:38,817 WARN L197 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 74 [2020-12-23 09:55:39,249 WARN L197 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 85 [2020-12-23 09:55:39,677 WARN L197 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 67 [2020-12-23 09:55:40,026 WARN L197 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 73 [2020-12-23 09:55:40,546 WARN L197 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 72 [2020-12-23 09:55:40,872 WARN L197 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 66 [2020-12-23 09:55:41,168 WARN L197 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 64 [2020-12-23 09:55:41,529 WARN L197 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 61 [2020-12-23 09:55:41,888 WARN L197 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 74 [2020-12-23 09:55:42,190 WARN L197 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2020-12-23 09:55:42,611 WARN L197 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 69 [2020-12-23 09:55:42,877 WARN L197 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2020-12-23 09:55:43,211 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2020-12-23 09:55:43,544 WARN L197 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 61 [2020-12-23 09:55:44,229 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2020-12-23 09:55:45,034 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2020-12-23 09:55:45,470 WARN L197 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 64 [2020-12-23 09:55:45,679 WARN L197 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2020-12-23 09:55:45,975 WARN L197 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 64 [2020-12-23 09:55:46,327 WARN L197 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 72 [2020-12-23 09:55:46,665 WARN L197 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 72 [2020-12-23 09:55:49,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:55:49,195 INFO L93 Difference]: Finished difference Result 23420 states and 29745 transitions. [2020-12-23 09:55:49,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-12-23 09:55:49,198 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 66 [2020-12-23 09:55:49,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:55:49,216 INFO L225 Difference]: With dead ends: 23420 [2020-12-23 09:55:49,216 INFO L226 Difference]: Without dead ends: 18513 [2020-12-23 09:55:49,223 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1391 ImplicationChecksByTransitivity, 14.5s TimeCoverageRelationStatistics Valid=1049, Invalid=5593, Unknown=0, NotChecked=0, Total=6642 [2020-12-23 09:55:49,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18513 states. [2020-12-23 09:55:50,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18513 to 7635. [2020-12-23 09:55:50,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7635 states. [2020-12-23 09:55:50,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7635 states to 7635 states and 9806 transitions. [2020-12-23 09:55:50,013 INFO L78 Accepts]: Start accepts. Automaton has 7635 states and 9806 transitions. Word has length 66 [2020-12-23 09:55:50,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:55:50,013 INFO L481 AbstractCegarLoop]: Abstraction has 7635 states and 9806 transitions. [2020-12-23 09:55:50,013 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-23 09:55:50,013 INFO L276 IsEmpty]: Start isEmpty. Operand 7635 states and 9806 transitions. [2020-12-23 09:55:50,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-23 09:55:50,014 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:55:50,014 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:55:50,214 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:55:50,215 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:55:50,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:55:50,216 INFO L82 PathProgramCache]: Analyzing trace with hash 395112077, now seen corresponding path program 1 times [2020-12-23 09:55:50,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:55:50,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537194200] [2020-12-23 09:55:50,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:55:50,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:55:51,372 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:55:51,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537194200] [2020-12-23 09:55:51,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530431089] [2020-12-23 09:55:51,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:55:51,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:55:51,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-23 09:55:51,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:55:51,916 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 09:55:52,326 WARN L197 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 34 [2020-12-23 09:55:53,012 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:55:53,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:55:53,012 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 12] total 33 [2020-12-23 09:55:53,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754429579] [2020-12-23 09:55:53,013 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-23 09:55:53,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:55:53,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-23 09:55:53,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=969, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 09:55:53,014 INFO L87 Difference]: Start difference. First operand 7635 states and 9806 transitions. Second operand 33 states. [2020-12-23 09:55:53,235 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-12-23 09:55:54,228 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2020-12-23 09:55:54,571 WARN L197 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2020-12-23 09:55:55,043 WARN L197 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 73 [2020-12-23 09:55:55,594 WARN L197 SmtUtils]: Spent 406.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 81 [2020-12-23 09:55:56,231 WARN L197 SmtUtils]: Spent 480.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 83 [2020-12-23 09:55:57,048 WARN L197 SmtUtils]: Spent 669.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 98 [2020-12-23 09:55:57,835 WARN L197 SmtUtils]: Spent 607.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 93 [2020-12-23 09:55:58,275 WARN L197 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 76 [2020-12-23 09:55:58,724 WARN L197 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 76 [2020-12-23 09:55:59,182 WARN L197 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 59 [2020-12-23 09:55:59,494 WARN L197 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2020-12-23 09:55:59,805 WARN L197 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2020-12-23 09:55:59,997 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2020-12-23 09:56:00,578 WARN L197 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2020-12-23 09:56:00,806 WARN L197 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 51 [2020-12-23 09:56:03,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:56:03,519 INFO L93 Difference]: Finished difference Result 15691 states and 20335 transitions. [2020-12-23 09:56:03,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-23 09:56:03,520 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 66 [2020-12-23 09:56:03,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:56:03,540 INFO L225 Difference]: With dead ends: 15691 [2020-12-23 09:56:03,540 INFO L226 Difference]: Without dead ends: 12156 [2020-12-23 09:56:03,546 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=527, Invalid=2895, Unknown=0, NotChecked=0, Total=3422 [2020-12-23 09:56:03,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12156 states. [2020-12-23 09:56:04,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12156 to 7442. [2020-12-23 09:56:04,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7442 states. [2020-12-23 09:56:04,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7442 states to 7442 states and 9586 transitions. [2020-12-23 09:56:04,340 INFO L78 Accepts]: Start accepts. Automaton has 7442 states and 9586 transitions. Word has length 66 [2020-12-23 09:56:04,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:56:04,341 INFO L481 AbstractCegarLoop]: Abstraction has 7442 states and 9586 transitions. [2020-12-23 09:56:04,341 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-23 09:56:04,341 INFO L276 IsEmpty]: Start isEmpty. Operand 7442 states and 9586 transitions. [2020-12-23 09:56:04,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-23 09:56:04,341 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:56:04,341 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] [2020-12-23 09:56:04,542 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-23 09:56:04,542 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:56:04,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:56:04,543 INFO L82 PathProgramCache]: Analyzing trace with hash 855365469, now seen corresponding path program 1 times [2020-12-23 09:56:04,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:56:04,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343430611] [2020-12-23 09:56:04,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:56:04,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:56:05,705 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:56:05,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343430611] [2020-12-23 09:56:05,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916131676] [2020-12-23 09:56:05,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:56:05,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:56:05,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-23 09:56:05,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:56:06,362 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 09:56:06,875 WARN L197 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 44 [2020-12-23 09:56:07,655 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 35 [2020-12-23 09:56:07,713 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:56:07,713 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:56:07,713 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 12] total 32 [2020-12-23 09:56:07,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075052139] [2020-12-23 09:56:07,714 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-23 09:56:07,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:56:07,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-23 09:56:07,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=915, Unknown=0, NotChecked=0, Total=992 [2020-12-23 09:56:07,715 INFO L87 Difference]: Start difference. First operand 7442 states and 9586 transitions. Second operand 32 states. [2020-12-23 09:56:08,103 WARN L197 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 73 [2020-12-23 09:56:09,005 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 24 [2020-12-23 09:56:09,274 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 26 [2020-12-23 09:56:09,545 WARN L197 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 30 [2020-12-23 09:56:09,837 WARN L197 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 40 [2020-12-23 09:56:10,221 WARN L197 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 53 [2020-12-23 09:56:10,798 WARN L197 SmtUtils]: Spent 449.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 83 [2020-12-23 09:56:11,447 WARN L197 SmtUtils]: Spent 512.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 94 [2020-12-23 09:56:12,147 WARN L197 SmtUtils]: Spent 571.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 91 [2020-12-23 09:56:12,625 WARN L197 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 76 [2020-12-23 09:56:13,099 WARN L197 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 76 [2020-12-23 09:56:13,569 WARN L197 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 76 [2020-12-23 09:56:13,961 WARN L197 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 72 [2020-12-23 09:56:14,322 WARN L197 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 68 [2020-12-23 09:56:14,612 WARN L197 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2020-12-23 09:56:15,124 WARN L197 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 45 [2020-12-23 09:56:15,439 WARN L197 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 62 [2020-12-23 09:56:15,828 WARN L197 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 45 [2020-12-23 09:56:16,152 WARN L197 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 62 [2020-12-23 09:56:16,478 WARN L197 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2020-12-23 09:56:16,952 WARN L197 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-12-23 09:56:17,305 WARN L197 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 50 [2020-12-23 09:56:18,621 WARN L197 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 65 [2020-12-23 09:56:19,260 WARN L197 SmtUtils]: Spent 391.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 90 [2020-12-23 09:56:19,608 WARN L197 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2020-12-23 09:56:19,942 WARN L197 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2020-12-23 09:56:20,410 WARN L197 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 82 [2020-12-23 09:56:23,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:56:23,248 INFO L93 Difference]: Finished difference Result 24176 states and 31344 transitions. [2020-12-23 09:56:23,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-23 09:56:23,250 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 67 [2020-12-23 09:56:23,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:56:23,271 INFO L225 Difference]: With dead ends: 24176 [2020-12-23 09:56:23,271 INFO L226 Difference]: Without dead ends: 18404 [2020-12-23 09:56:23,279 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 701 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=626, Invalid=3534, Unknown=0, NotChecked=0, Total=4160 [2020-12-23 09:56:23,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18404 states. [2020-12-23 09:56:24,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18404 to 6648. [2020-12-23 09:56:24,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6648 states. [2020-12-23 09:56:24,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6648 states to 6648 states and 8576 transitions. [2020-12-23 09:56:24,097 INFO L78 Accepts]: Start accepts. Automaton has 6648 states and 8576 transitions. Word has length 67 [2020-12-23 09:56:24,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:56:24,097 INFO L481 AbstractCegarLoop]: Abstraction has 6648 states and 8576 transitions. [2020-12-23 09:56:24,097 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-23 09:56:24,097 INFO L276 IsEmpty]: Start isEmpty. Operand 6648 states and 8576 transitions. [2020-12-23 09:56:24,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-12-23 09:56:24,101 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:56:24,101 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 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] [2020-12-23 09:56:24,314 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:56:24,315 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:56:24,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:56:24,316 INFO L82 PathProgramCache]: Analyzing trace with hash -1441412763, now seen corresponding path program 1 times [2020-12-23 09:56:24,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:56:24,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233599047] [2020-12-23 09:56:24,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:56:24,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:56:24,394 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-12-23 09:56:24,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233599047] [2020-12-23 09:56:24,394 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:56:24,394 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 09:56:24,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350459959] [2020-12-23 09:56:24,395 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 09:56:24,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:56:24,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 09:56:24,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 09:56:24,396 INFO L87 Difference]: Start difference. First operand 6648 states and 8576 transitions. Second operand 5 states. [2020-12-23 09:56:25,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:56:25,419 INFO L93 Difference]: Finished difference Result 14081 states and 18286 transitions. [2020-12-23 09:56:25,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 09:56:25,421 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 111 [2020-12-23 09:56:25,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:56:25,430 INFO L225 Difference]: With dead ends: 14081 [2020-12-23 09:56:25,430 INFO L226 Difference]: Without dead ends: 7622 [2020-12-23 09:56:25,435 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-23 09:56:25,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7622 states. [2020-12-23 09:56:25,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7622 to 3626. [2020-12-23 09:56:25,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3626 states. [2020-12-23 09:56:25,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3626 states to 3626 states and 4606 transitions. [2020-12-23 09:56:25,992 INFO L78 Accepts]: Start accepts. Automaton has 3626 states and 4606 transitions. Word has length 111 [2020-12-23 09:56:25,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:56:25,992 INFO L481 AbstractCegarLoop]: Abstraction has 3626 states and 4606 transitions. [2020-12-23 09:56:25,992 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 09:56:25,993 INFO L276 IsEmpty]: Start isEmpty. Operand 3626 states and 4606 transitions. [2020-12-23 09:56:25,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-12-23 09:56:25,995 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:56:25,995 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-12-23 09:56:25,996 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-12-23 09:56:25,996 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:56:25,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:56:25,996 INFO L82 PathProgramCache]: Analyzing trace with hash -1865059485, now seen corresponding path program 1 times [2020-12-23 09:56:25,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:56:25,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154634241] [2020-12-23 09:56:25,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:56:26,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:56:26,745 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 22 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:56:26,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154634241] [2020-12-23 09:56:26,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58178051] [2020-12-23 09:56:26,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:56:26,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:56:26,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-23 09:56:26,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:56:27,179 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 34 [2020-12-23 09:56:27,793 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-12-23 09:56:27,952 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 09:56:28,326 INFO L757 QuantifierPusher]: Run 20 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 09:56:29,303 INFO L757 QuantifierPusher]: Run 30 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 09:56:30,549 INFO L757 QuantifierPusher]: Run 40 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 09:56:32,381 INFO L757 QuantifierPusher]: Run 50 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 09:56:36,708 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 09:56:36,745 INFO L757 QuantifierPusher]: Run 20 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 09:56:38,929 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 09:57:02,843 WARN L197 SmtUtils]: Spent 5.07 s on a formula simplification. DAG size of input: 458 DAG size of output: 398 [2020-12-23 09:57:29,132 WARN L197 SmtUtils]: Spent 1.08 s on a formula simplification that was a NOOP. DAG size: 398