/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-178dd20 [2021-01-06 19:46:49,525 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 19:46:49,528 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 19:46:49,570 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 19:46:49,571 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 19:46:49,573 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 19:46:49,575 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 19:46:49,578 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 19:46:49,585 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 19:46:49,586 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 19:46:49,587 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 19:46:49,589 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 19:46:49,589 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 19:46:49,591 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 19:46:49,592 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 19:46:49,594 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 19:46:49,595 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 19:46:49,607 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 19:46:49,610 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 19:46:49,612 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 19:46:49,614 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 19:46:49,621 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 19:46:49,624 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 19:46:49,626 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 19:46:49,637 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 19:46:49,647 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 19:46:49,648 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 19:46:49,650 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 19:46:49,652 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 19:46:49,653 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 19:46:49,654 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 19:46:49,654 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 19:46:49,655 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 19:46:49,660 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 19:46:49,665 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 19:46:49,667 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 19:46:49,668 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 19:46:49,721 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 19:46:49,721 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 19:46:49,725 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 19:46:49,726 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 19:46:49,726 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 19:46:49,726 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 19:46:49,726 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 19:46:49,726 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 19:46:49,727 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 19:46:49,727 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 19:46:49,728 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 19:46:49,728 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 19:46:49,729 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 19:46:49,729 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 19:46:49,729 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 19:46:49,729 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 19:46:49,729 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 19:46:49,729 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 19:46:49,730 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 19:46:49,730 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 19:46:49,730 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 19:46:49,730 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 19:46:49,730 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 19:46:49,731 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 19:46:49,731 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 19:46:49,731 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 19:46:50,177 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 19:46:50,223 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 19:46:50,226 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 19:46:50,228 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 19:46:50,229 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 19:46:50,230 INFO L432 ainManager$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 [2021-01-06 19:46:50,322 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/fa41f5997/6240b0d02d254c62a5fa294c0b956822/FLAG2304748e0 [2021-01-06 19:46:51,116 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 19:46:51,117 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr.3.1.ufo.BOUNDED-6.pals.c [2021-01-06 19:46:51,133 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/fa41f5997/6240b0d02d254c62a5fa294c0b956822/FLAG2304748e0 [2021-01-06 19:46:51,407 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/fa41f5997/6240b0d02d254c62a5fa294c0b956822 [2021-01-06 19:46:51,410 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 19:46:51,413 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 19:46:51,414 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 19:46:51,415 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 19:46:51,419 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 19:46:51,420 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 07:46:51" (1/1) ... [2021-01-06 19:46:51,421 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b3a30c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:46:51, skipping insertion in model container [2021-01-06 19:46:51,421 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 07:46:51" (1/1) ... [2021-01-06 19:46:51,430 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 19:46:51,457 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,] [2021-01-06 19:46:51,677 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] [2021-01-06 19:46:51,681 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 19:46:51,695 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,] [2021-01-06 19:46:51,747 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] [2021-01-06 19:46:51,748 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 19:46:51,790 INFO L208 MainTranslator]: Completed translation [2021-01-06 19:46:51,790 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:46:51 WrapperNode [2021-01-06 19:46:51,791 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 19:46:51,794 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 19:46:51,795 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 19:46:51,795 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 19:46:51,804 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:46:51" (1/1) ... [2021-01-06 19:46:51,836 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:46:51" (1/1) ... [2021-01-06 19:46:51,870 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 19:46:51,871 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 19:46:51,871 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 19:46:51,871 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 19:46:51,881 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:46:51" (1/1) ... [2021-01-06 19:46:51,882 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:46:51" (1/1) ... [2021-01-06 19:46:51,884 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:46:51" (1/1) ... [2021-01-06 19:46:51,885 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:46:51" (1/1) ... [2021-01-06 19:46:51,891 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:46:51" (1/1) ... [2021-01-06 19:46:51,898 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:46:51" (1/1) ... [2021-01-06 19:46:51,902 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:46:51" (1/1) ... [2021-01-06 19:46:51,906 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 19:46:51,908 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 19:46:51,908 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 19:46:51,908 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 19:46:51,909 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:46:51" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 19:46:52,042 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 19:46:52,042 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 19:46:52,043 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 19:46:52,043 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 19:46:52,911 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 19:46:52,912 INFO L299 CfgBuilder]: Removed 17 assume(true) statements. [2021-01-06 19:46:52,914 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 07:46:52 BoogieIcfgContainer [2021-01-06 19:46:52,914 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 19:46:52,916 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 19:46:52,917 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 19:46:52,920 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 19:46:52,921 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 07:46:51" (1/3) ... [2021-01-06 19:46:52,922 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ff84e64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 07:46:52, skipping insertion in model container [2021-01-06 19:46:52,922 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:46:51" (2/3) ... [2021-01-06 19:46:52,923 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ff84e64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 07:46:52, skipping insertion in model container [2021-01-06 19:46:52,923 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 07:46:52" (3/3) ... [2021-01-06 19:46:52,925 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.1.ufo.BOUNDED-6.pals.c [2021-01-06 19:46:52,933 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 19:46:52,940 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 19:46:52,963 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 19:46:52,994 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 19:46:52,994 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 19:46:52,994 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 19:46:52,994 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 19:46:52,995 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 19:46:52,995 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 19:46:52,995 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 19:46:52,995 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 19:46:53,011 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states. [2021-01-06 19:46:53,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-01-06 19:46:53,020 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:46:53,021 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] [2021-01-06 19:46:53,021 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:46:53,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:46:53,029 INFO L82 PathProgramCache]: Analyzing trace with hash 1133243219, now seen corresponding path program 1 times [2021-01-06 19:46:53,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:46:53,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476235329] [2021-01-06 19:46:53,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:46:53,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:46:53,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 19:46:53,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476235329] [2021-01-06 19:46:53,320 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 19:46:53,320 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 19:46:53,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674653024] [2021-01-06 19:46:53,326 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 19:46:53,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:46:53,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 19:46:53,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 19:46:53,345 INFO L87 Difference]: Start difference. First operand 62 states. Second operand 2 states. [2021-01-06 19:46:53,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:46:53,370 INFO L93 Difference]: Finished difference Result 103 states and 164 transitions. [2021-01-06 19:46:53,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 19:46:53,372 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 25 [2021-01-06 19:46:53,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:46:53,383 INFO L225 Difference]: With dead ends: 103 [2021-01-06 19:46:53,384 INFO L226 Difference]: Without dead ends: 58 [2021-01-06 19:46:53,387 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 19:46:53,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-01-06 19:46:53,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-01-06 19:46:53,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2021-01-06 19:46:53,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 94 transitions. [2021-01-06 19:46:53,431 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 94 transitions. Word has length 25 [2021-01-06 19:46:53,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:46:53,431 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 94 transitions. [2021-01-06 19:46:53,431 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 19:46:53,432 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 94 transitions. [2021-01-06 19:46:53,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-01-06 19:46:53,437 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:46:53,437 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] [2021-01-06 19:46:53,438 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 19:46:53,438 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:46:53,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:46:53,439 INFO L82 PathProgramCache]: Analyzing trace with hash 315594769, now seen corresponding path program 1 times [2021-01-06 19:46:53,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:46:53,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625667356] [2021-01-06 19:46:53,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:46:53,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:46:53,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 19:46:53,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625667356] [2021-01-06 19:46:53,623 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 19:46:53,623 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 19:46:53,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125275183] [2021-01-06 19:46:53,627 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 19:46:53,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:46:53,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 19:46:53,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-01-06 19:46:53,631 INFO L87 Difference]: Start difference. First operand 58 states and 94 transitions. Second operand 5 states. [2021-01-06 19:46:53,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:46:53,747 INFO L93 Difference]: Finished difference Result 134 states and 210 transitions. [2021-01-06 19:46:53,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 19:46:53,749 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2021-01-06 19:46:53,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:46:53,754 INFO L225 Difference]: With dead ends: 134 [2021-01-06 19:46:53,755 INFO L226 Difference]: Without dead ends: 94 [2021-01-06 19:46:53,759 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-01-06 19:46:53,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-01-06 19:46:53,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 58. [2021-01-06 19:46:53,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2021-01-06 19:46:53,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 78 transitions. [2021-01-06 19:46:53,769 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 78 transitions. Word has length 25 [2021-01-06 19:46:53,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:46:53,769 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 78 transitions. [2021-01-06 19:46:53,770 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 19:46:53,770 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 78 transitions. [2021-01-06 19:46:53,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-01-06 19:46:53,771 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:46:53,772 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] [2021-01-06 19:46:53,772 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-06 19:46:53,772 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:46:53,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:46:53,773 INFO L82 PathProgramCache]: Analyzing trace with hash -278543826, now seen corresponding path program 1 times [2021-01-06 19:46:53,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:46:53,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956535710] [2021-01-06 19:46:53,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:46:53,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:46:53,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 19:46:53,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956535710] [2021-01-06 19:46:53,899 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 19:46:53,899 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 19:46:53,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540937216] [2021-01-06 19:46:53,901 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 19:46:53,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:46:53,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 19:46:53,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 19:46:53,904 INFO L87 Difference]: Start difference. First operand 58 states and 78 transitions. Second operand 3 states. [2021-01-06 19:46:53,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:46:53,953 INFO L93 Difference]: Finished difference Result 124 states and 180 transitions. [2021-01-06 19:46:53,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 19:46:53,957 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 40 [2021-01-06 19:46:53,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:46:53,959 INFO L225 Difference]: With dead ends: 124 [2021-01-06 19:46:53,959 INFO L226 Difference]: Without dead ends: 88 [2021-01-06 19:46:53,960 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 19:46:53,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-01-06 19:46:53,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 86. [2021-01-06 19:46:53,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2021-01-06 19:46:53,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 122 transitions. [2021-01-06 19:46:53,985 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 122 transitions. Word has length 40 [2021-01-06 19:46:53,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:46:53,985 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 122 transitions. [2021-01-06 19:46:53,986 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 19:46:53,986 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 122 transitions. [2021-01-06 19:46:53,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-01-06 19:46:53,991 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:46:53,992 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] [2021-01-06 19:46:53,992 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-01-06 19:46:53,992 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:46:53,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:46:53,993 INFO L82 PathProgramCache]: Analyzing trace with hash 1401070434, now seen corresponding path program 1 times [2021-01-06 19:46:53,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:46:53,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527593348] [2021-01-06 19:46:53,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:46:54,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:46:54,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 19:46:54,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527593348] [2021-01-06 19:46:54,129 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 19:46:54,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 19:46:54,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690672701] [2021-01-06 19:46:54,130 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 19:46:54,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:46:54,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 19:46:54,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 19:46:54,132 INFO L87 Difference]: Start difference. First operand 86 states and 122 transitions. Second operand 3 states. [2021-01-06 19:46:54,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:46:54,167 INFO L93 Difference]: Finished difference Result 202 states and 302 transitions. [2021-01-06 19:46:54,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 19:46:54,168 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 40 [2021-01-06 19:46:54,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:46:54,170 INFO L225 Difference]: With dead ends: 202 [2021-01-06 19:46:54,170 INFO L226 Difference]: Without dead ends: 138 [2021-01-06 19:46:54,171 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 19:46:54,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-01-06 19:46:54,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 136. [2021-01-06 19:46:54,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2021-01-06 19:46:54,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 199 transitions. [2021-01-06 19:46:54,191 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 199 transitions. Word has length 40 [2021-01-06 19:46:54,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:46:54,191 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 199 transitions. [2021-01-06 19:46:54,192 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 19:46:54,192 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 199 transitions. [2021-01-06 19:46:54,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-01-06 19:46:54,193 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:46:54,194 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] [2021-01-06 19:46:54,194 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-01-06 19:46:54,194 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:46:54,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:46:54,195 INFO L82 PathProgramCache]: Analyzing trace with hash 1738863576, now seen corresponding path program 1 times [2021-01-06 19:46:54,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:46:54,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875467469] [2021-01-06 19:46:54,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:46:54,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:46:54,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 19:46:54,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875467469] [2021-01-06 19:46:54,315 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 19:46:54,315 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 19:46:54,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021999453] [2021-01-06 19:46:54,316 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 19:46:54,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:46:54,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 19:46:54,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 19:46:54,319 INFO L87 Difference]: Start difference. First operand 136 states and 199 transitions. Second operand 3 states. [2021-01-06 19:46:54,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:46:54,388 INFO L93 Difference]: Finished difference Result 340 states and 513 transitions. [2021-01-06 19:46:54,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 19:46:54,391 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 40 [2021-01-06 19:46:54,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:46:54,396 INFO L225 Difference]: With dead ends: 340 [2021-01-06 19:46:54,397 INFO L226 Difference]: Without dead ends: 226 [2021-01-06 19:46:54,399 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 19:46:54,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-01-06 19:46:54,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 224. [2021-01-06 19:46:54,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2021-01-06 19:46:54,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 331 transitions. [2021-01-06 19:46:54,456 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 331 transitions. Word has length 40 [2021-01-06 19:46:54,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:46:54,457 INFO L481 AbstractCegarLoop]: Abstraction has 224 states and 331 transitions. [2021-01-06 19:46:54,457 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 19:46:54,457 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 331 transitions. [2021-01-06 19:46:54,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-01-06 19:46:54,461 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:46:54,462 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] [2021-01-06 19:46:54,462 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-01-06 19:46:54,462 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:46:54,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:46:54,463 INFO L82 PathProgramCache]: Analyzing trace with hash -1338118322, now seen corresponding path program 1 times [2021-01-06 19:46:54,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:46:54,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69922775] [2021-01-06 19:46:54,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:46:54,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:46:54,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 19:46:54,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69922775] [2021-01-06 19:46:54,632 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 19:46:54,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 19:46:54,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418908844] [2021-01-06 19:46:54,633 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 19:46:54,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:46:54,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 19:46:54,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-01-06 19:46:54,636 INFO L87 Difference]: Start difference. First operand 224 states and 331 transitions. Second operand 6 states. [2021-01-06 19:46:54,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:46:54,866 INFO L93 Difference]: Finished difference Result 676 states and 1017 transitions. [2021-01-06 19:46:54,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 19:46:54,869 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 40 [2021-01-06 19:46:54,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:46:54,873 INFO L225 Difference]: With dead ends: 676 [2021-01-06 19:46:54,873 INFO L226 Difference]: Without dead ends: 474 [2021-01-06 19:46:54,877 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 [2021-01-06 19:46:54,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2021-01-06 19:46:54,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 424. [2021-01-06 19:46:54,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 424 states. [2021-01-06 19:46:54,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 635 transitions. [2021-01-06 19:46:54,937 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 635 transitions. Word has length 40 [2021-01-06 19:46:54,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:46:54,938 INFO L481 AbstractCegarLoop]: Abstraction has 424 states and 635 transitions. [2021-01-06 19:46:54,938 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 19:46:54,938 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 635 transitions. [2021-01-06 19:46:54,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-01-06 19:46:54,942 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:46:54,942 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] [2021-01-06 19:46:54,943 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-01-06 19:46:54,943 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:46:54,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:46:54,944 INFO L82 PathProgramCache]: Analyzing trace with hash -317049968, now seen corresponding path program 1 times [2021-01-06 19:46:54,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:46:54,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123252049] [2021-01-06 19:46:54,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:46:55,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:46:55,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 19:46:55,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123252049] [2021-01-06 19:46:55,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 19:46:55,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 19:46:55,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330538690] [2021-01-06 19:46:55,117 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 19:46:55,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:46:55,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 19:46:55,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 19:46:55,122 INFO L87 Difference]: Start difference. First operand 424 states and 635 transitions. Second operand 5 states. [2021-01-06 19:46:55,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:46:55,360 INFO L93 Difference]: Finished difference Result 2434 states and 3700 transitions. [2021-01-06 19:46:55,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 19:46:55,361 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 40 [2021-01-06 19:46:55,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:46:55,373 INFO L225 Difference]: With dead ends: 2434 [2021-01-06 19:46:55,373 INFO L226 Difference]: Without dead ends: 2032 [2021-01-06 19:46:55,375 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 [2021-01-06 19:46:55,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2032 states. [2021-01-06 19:46:55,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2032 to 824. [2021-01-06 19:46:55,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 824 states. [2021-01-06 19:46:55,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 824 states to 824 states and 1215 transitions. [2021-01-06 19:46:55,449 INFO L78 Accepts]: Start accepts. Automaton has 824 states and 1215 transitions. Word has length 40 [2021-01-06 19:46:55,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:46:55,450 INFO L481 AbstractCegarLoop]: Abstraction has 824 states and 1215 transitions. [2021-01-06 19:46:55,450 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 19:46:55,450 INFO L276 IsEmpty]: Start isEmpty. Operand 824 states and 1215 transitions. [2021-01-06 19:46:55,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-01-06 19:46:55,451 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:46:55,452 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] [2021-01-06 19:46:55,452 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-01-06 19:46:55,452 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:46:55,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:46:55,453 INFO L82 PathProgramCache]: Analyzing trace with hash -1091548472, now seen corresponding path program 1 times [2021-01-06 19:46:55,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:46:55,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011276840] [2021-01-06 19:46:55,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:46:55,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:46:55,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 19:46:55,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011276840] [2021-01-06 19:46:55,608 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 19:46:55,608 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 19:46:55,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169864458] [2021-01-06 19:46:55,609 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 19:46:55,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:46:55,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 19:46:55,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 19:46:55,610 INFO L87 Difference]: Start difference. First operand 824 states and 1215 transitions. Second operand 5 states. [2021-01-06 19:46:55,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:46:55,741 INFO L93 Difference]: Finished difference Result 2030 states and 3022 transitions. [2021-01-06 19:46:55,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 19:46:55,742 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 42 [2021-01-06 19:46:55,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:46:55,750 INFO L225 Difference]: With dead ends: 2030 [2021-01-06 19:46:55,750 INFO L226 Difference]: Without dead ends: 1228 [2021-01-06 19:46:55,752 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 [2021-01-06 19:46:55,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1228 states. [2021-01-06 19:46:55,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1228 to 824. [2021-01-06 19:46:55,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 824 states. [2021-01-06 19:46:55,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 824 states to 824 states and 1199 transitions. [2021-01-06 19:46:55,821 INFO L78 Accepts]: Start accepts. Automaton has 824 states and 1199 transitions. Word has length 42 [2021-01-06 19:46:55,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:46:55,821 INFO L481 AbstractCegarLoop]: Abstraction has 824 states and 1199 transitions. [2021-01-06 19:46:55,821 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 19:46:55,822 INFO L276 IsEmpty]: Start isEmpty. Operand 824 states and 1199 transitions. [2021-01-06 19:46:55,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-01-06 19:46:55,822 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:46:55,823 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] [2021-01-06 19:46:55,823 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-01-06 19:46:55,823 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:46:55,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:46:55,824 INFO L82 PathProgramCache]: Analyzing trace with hash -1158041984, now seen corresponding path program 1 times [2021-01-06 19:46:55,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:46:55,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234679999] [2021-01-06 19:46:55,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:46:55,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:46:55,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 19:46:55,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234679999] [2021-01-06 19:46:55,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 19:46:55,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 19:46:55,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739999912] [2021-01-06 19:46:55,867 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 19:46:55,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:46:55,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 19:46:55,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 19:46:55,869 INFO L87 Difference]: Start difference. First operand 824 states and 1199 transitions. Second operand 3 states. [2021-01-06 19:46:55,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:46:55,958 INFO L93 Difference]: Finished difference Result 1810 states and 2635 transitions. [2021-01-06 19:46:55,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 19:46:55,959 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 42 [2021-01-06 19:46:55,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:46:55,965 INFO L225 Difference]: With dead ends: 1810 [2021-01-06 19:46:55,966 INFO L226 Difference]: Without dead ends: 1008 [2021-01-06 19:46:55,968 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 19:46:55,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1008 states. [2021-01-06 19:46:56,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1008 to 1006. [2021-01-06 19:46:56,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1006 states. [2021-01-06 19:46:56,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1006 states to 1006 states and 1445 transitions. [2021-01-06 19:46:56,076 INFO L78 Accepts]: Start accepts. Automaton has 1006 states and 1445 transitions. Word has length 42 [2021-01-06 19:46:56,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:46:56,077 INFO L481 AbstractCegarLoop]: Abstraction has 1006 states and 1445 transitions. [2021-01-06 19:46:56,077 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 19:46:56,077 INFO L276 IsEmpty]: Start isEmpty. Operand 1006 states and 1445 transitions. [2021-01-06 19:46:56,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-01-06 19:46:56,080 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:46:56,080 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] [2021-01-06 19:46:56,080 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-01-06 19:46:56,080 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:46:56,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:46:56,081 INFO L82 PathProgramCache]: Analyzing trace with hash 107012533, now seen corresponding path program 1 times [2021-01-06 19:46:56,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:46:56,081 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750367184] [2021-01-06 19:46:56,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:46:56,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:46:56,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 19:46:56,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750367184] [2021-01-06 19:46:56,183 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 19:46:56,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 19:46:56,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160008228] [2021-01-06 19:46:56,184 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 19:46:56,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:46:56,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 19:46:56,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-01-06 19:46:56,185 INFO L87 Difference]: Start difference. First operand 1006 states and 1445 transitions. Second operand 5 states. [2021-01-06 19:46:56,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:46:56,412 INFO L93 Difference]: Finished difference Result 1993 states and 2820 transitions. [2021-01-06 19:46:56,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 19:46:56,412 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 43 [2021-01-06 19:46:56,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:46:56,431 INFO L225 Difference]: With dead ends: 1993 [2021-01-06 19:46:56,431 INFO L226 Difference]: Without dead ends: 1991 [2021-01-06 19:46:56,432 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 [2021-01-06 19:46:56,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1991 states. [2021-01-06 19:46:56,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1991 to 1102. [2021-01-06 19:46:56,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1102 states. [2021-01-06 19:46:56,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1102 states to 1102 states and 1537 transitions. [2021-01-06 19:46:56,549 INFO L78 Accepts]: Start accepts. Automaton has 1102 states and 1537 transitions. Word has length 43 [2021-01-06 19:46:56,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:46:56,550 INFO L481 AbstractCegarLoop]: Abstraction has 1102 states and 1537 transitions. [2021-01-06 19:46:56,550 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 19:46:56,550 INFO L276 IsEmpty]: Start isEmpty. Operand 1102 states and 1537 transitions. [2021-01-06 19:46:56,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-06 19:46:56,558 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:46:56,558 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] [2021-01-06 19:46:56,558 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-01-06 19:46:56,559 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:46:56,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:46:56,559 INFO L82 PathProgramCache]: Analyzing trace with hash -1027002802, now seen corresponding path program 1 times [2021-01-06 19:46:56,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:46:56,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037686956] [2021-01-06 19:46:56,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:46:56,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:46:56,661 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-01-06 19:46:56,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037686956] [2021-01-06 19:46:56,661 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 19:46:56,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 19:46:56,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424162573] [2021-01-06 19:46:56,662 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 19:46:56,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:46:56,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 19:46:56,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 19:46:56,665 INFO L87 Difference]: Start difference. First operand 1102 states and 1537 transitions. Second operand 5 states. [2021-01-06 19:46:57,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:46:57,057 INFO L93 Difference]: Finished difference Result 4698 states and 6565 transitions. [2021-01-06 19:46:57,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 19:46:57,057 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 63 [2021-01-06 19:46:57,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:46:57,079 INFO L225 Difference]: With dead ends: 4698 [2021-01-06 19:46:57,079 INFO L226 Difference]: Without dead ends: 3620 [2021-01-06 19:46:57,083 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 [2021-01-06 19:46:57,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3620 states. [2021-01-06 19:46:57,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3620 to 2178. [2021-01-06 19:46:57,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2178 states. [2021-01-06 19:46:57,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2178 states to 2178 states and 3029 transitions. [2021-01-06 19:46:57,346 INFO L78 Accepts]: Start accepts. Automaton has 2178 states and 3029 transitions. Word has length 63 [2021-01-06 19:46:57,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:46:57,346 INFO L481 AbstractCegarLoop]: Abstraction has 2178 states and 3029 transitions. [2021-01-06 19:46:57,346 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 19:46:57,347 INFO L276 IsEmpty]: Start isEmpty. Operand 2178 states and 3029 transitions. [2021-01-06 19:46:57,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-06 19:46:57,348 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:46:57,349 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] [2021-01-06 19:46:57,349 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-01-06 19:46:57,349 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:46:57,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:46:57,350 INFO L82 PathProgramCache]: Analyzing trace with hash 1499181678, now seen corresponding path program 1 times [2021-01-06 19:46:57,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:46:57,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106195371] [2021-01-06 19:46:57,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:46:57,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:46:57,461 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 19:46:57,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106195371] [2021-01-06 19:46:57,461 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 19:46:57,462 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 19:46:57,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820481836] [2021-01-06 19:46:57,462 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 19:46:57,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:46:57,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 19:46:57,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 19:46:57,463 INFO L87 Difference]: Start difference. First operand 2178 states and 3029 transitions. Second operand 5 states. [2021-01-06 19:46:57,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:46:57,868 INFO L93 Difference]: Finished difference Result 5774 states and 8057 transitions. [2021-01-06 19:46:57,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 19:46:57,868 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 63 [2021-01-06 19:46:57,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:46:57,892 INFO L225 Difference]: With dead ends: 5774 [2021-01-06 19:46:57,893 INFO L226 Difference]: Without dead ends: 4696 [2021-01-06 19:46:57,896 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 [2021-01-06 19:46:57,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4696 states. [2021-01-06 19:46:58,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4696 to 3794. [2021-01-06 19:46:58,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3794 states. [2021-01-06 19:46:58,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3794 states to 3794 states and 5249 transitions. [2021-01-06 19:46:58,207 INFO L78 Accepts]: Start accepts. Automaton has 3794 states and 5249 transitions. Word has length 63 [2021-01-06 19:46:58,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:46:58,208 INFO L481 AbstractCegarLoop]: Abstraction has 3794 states and 5249 transitions. [2021-01-06 19:46:58,208 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 19:46:58,208 INFO L276 IsEmpty]: Start isEmpty. Operand 3794 states and 5249 transitions. [2021-01-06 19:46:58,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-06 19:46:58,210 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:46:58,210 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] [2021-01-06 19:46:58,210 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-01-06 19:46:58,211 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:46:58,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:46:58,211 INFO L82 PathProgramCache]: Analyzing trace with hash -1664145778, now seen corresponding path program 1 times [2021-01-06 19:46:58,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:46:58,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054706685] [2021-01-06 19:46:58,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:46:58,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:46:58,313 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 19:46:58,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054706685] [2021-01-06 19:46:58,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 19:46:58,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 19:46:58,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084105051] [2021-01-06 19:46:58,315 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 19:46:58,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:46:58,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 19:46:58,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 19:46:58,316 INFO L87 Difference]: Start difference. First operand 3794 states and 5249 transitions. Second operand 5 states. [2021-01-06 19:46:58,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:46:58,795 INFO L93 Difference]: Finished difference Result 6670 states and 9309 transitions. [2021-01-06 19:46:58,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 19:46:58,796 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 63 [2021-01-06 19:46:58,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:46:58,823 INFO L225 Difference]: With dead ends: 6670 [2021-01-06 19:46:58,823 INFO L226 Difference]: Without dead ends: 5772 [2021-01-06 19:46:58,831 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 [2021-01-06 19:46:58,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5772 states. [2021-01-06 19:46:59,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5772 to 4690. [2021-01-06 19:46:59,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4690 states. [2021-01-06 19:46:59,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4690 states to 4690 states and 6505 transitions. [2021-01-06 19:46:59,271 INFO L78 Accepts]: Start accepts. Automaton has 4690 states and 6505 transitions. Word has length 63 [2021-01-06 19:46:59,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:46:59,273 INFO L481 AbstractCegarLoop]: Abstraction has 4690 states and 6505 transitions. [2021-01-06 19:46:59,273 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 19:46:59,274 INFO L276 IsEmpty]: Start isEmpty. Operand 4690 states and 6505 transitions. [2021-01-06 19:46:59,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-01-06 19:46:59,276 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:46:59,276 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] [2021-01-06 19:46:59,276 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-01-06 19:46:59,276 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:46:59,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:46:59,277 INFO L82 PathProgramCache]: Analyzing trace with hash -229876224, now seen corresponding path program 1 times [2021-01-06 19:46:59,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:46:59,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841690437] [2021-01-06 19:46:59,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:46:59,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:46:59,392 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 19:46:59,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841690437] [2021-01-06 19:46:59,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816128592] [2021-01-06 19:46:59,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:46:59,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:46:59,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 19:46:59,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:46:59,710 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 19:46:59,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:46:59,711 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 7 [2021-01-06 19:46:59,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819696169] [2021-01-06 19:46:59,712 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 19:46:59,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:46:59,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 19:46:59,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-01-06 19:46:59,714 INFO L87 Difference]: Start difference. First operand 4690 states and 6505 transitions. Second operand 7 states. [2021-01-06 19:47:00,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:47:00,681 INFO L93 Difference]: Finished difference Result 11621 states and 16185 transitions. [2021-01-06 19:47:00,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 19:47:00,681 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 64 [2021-01-06 19:47:00,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:47:00,735 INFO L225 Difference]: With dead ends: 11621 [2021-01-06 19:47:00,735 INFO L226 Difference]: Without dead ends: 7587 [2021-01-06 19:47:00,743 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 [2021-01-06 19:47:00,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7587 states. [2021-01-06 19:47:01,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7587 to 7538. [2021-01-06 19:47:01,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7538 states. [2021-01-06 19:47:01,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7538 states to 7538 states and 10277 transitions. [2021-01-06 19:47:01,467 INFO L78 Accepts]: Start accepts. Automaton has 7538 states and 10277 transitions. Word has length 64 [2021-01-06 19:47:01,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:47:01,468 INFO L481 AbstractCegarLoop]: Abstraction has 7538 states and 10277 transitions. [2021-01-06 19:47:01,468 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 19:47:01,468 INFO L276 IsEmpty]: Start isEmpty. Operand 7538 states and 10277 transitions. [2021-01-06 19:47:01,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-01-06 19:47:01,470 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:47:01,470 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] [2021-01-06 19:47:01,685 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-06 19:47:01,687 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:47:01,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:47:01,688 INFO L82 PathProgramCache]: Analyzing trace with hash -456421882, now seen corresponding path program 1 times [2021-01-06 19:47:01,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:47:01,689 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941482575] [2021-01-06 19:47:01,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:47:01,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:47:01,932 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 19:47:01,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941482575] [2021-01-06 19:47:01,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80100862] [2021-01-06 19:47:01,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:47:02,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:47:02,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 19:47:02,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:47:02,231 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 19:47:02,551 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 19:47:02,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:47:02,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-01-06 19:47:02,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949937070] [2021-01-06 19:47:02,553 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 19:47:02,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:47:02,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 19:47:02,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-01-06 19:47:02,554 INFO L87 Difference]: Start difference. First operand 7538 states and 10277 transitions. Second operand 17 states. [2021-01-06 19:47:05,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:47:05,648 INFO L93 Difference]: Finished difference Result 24813 states and 33558 transitions. [2021-01-06 19:47:05,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-06 19:47:05,649 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 65 [2021-01-06 19:47:05,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:47:05,692 INFO L225 Difference]: With dead ends: 24813 [2021-01-06 19:47:05,693 INFO L226 Difference]: Without dead ends: 17299 [2021-01-06 19:47:05,708 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 [2021-01-06 19:47:05,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17299 states. [2021-01-06 19:47:06,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17299 to 11114. [2021-01-06 19:47:06,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11114 states. [2021-01-06 19:47:06,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11114 states to 11114 states and 15005 transitions. [2021-01-06 19:47:06,979 INFO L78 Accepts]: Start accepts. Automaton has 11114 states and 15005 transitions. Word has length 65 [2021-01-06 19:47:06,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:47:06,979 INFO L481 AbstractCegarLoop]: Abstraction has 11114 states and 15005 transitions. [2021-01-06 19:47:06,979 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 19:47:06,979 INFO L276 IsEmpty]: Start isEmpty. Operand 11114 states and 15005 transitions. [2021-01-06 19:47:06,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-01-06 19:47:06,981 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:47:06,982 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] [2021-01-06 19:47:07,195 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-01-06 19:47:07,195 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:47:07,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:47:07,197 INFO L82 PathProgramCache]: Analyzing trace with hash 550341158, now seen corresponding path program 1 times [2021-01-06 19:47:07,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:47:07,198 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302825590] [2021-01-06 19:47:07,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:47:07,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:47:07,413 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 19:47:07,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302825590] [2021-01-06 19:47:07,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975047018] [2021-01-06 19:47:07,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:47:07,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:47:07,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-06 19:47:07,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:47:07,722 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 19:47:08,130 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 19:47:08,131 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:47:08,131 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-01-06 19:47:08,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661052367] [2021-01-06 19:47:08,132 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 19:47:08,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:47:08,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 19:47:08,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-01-06 19:47:08,133 INFO L87 Difference]: Start difference. First operand 11114 states and 15005 transitions. Second operand 17 states. [2021-01-06 19:47:09,051 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-01-06 19:47:11,318 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 59 [2021-01-06 19:47:11,727 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 56 [2021-01-06 19:47:12,612 WARN L197 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 59 [2021-01-06 19:47:13,433 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 47 [2021-01-06 19:47:26,995 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2021-01-06 19:47:28,341 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2021-01-06 19:47:35,068 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2021-01-06 19:47:39,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:47:39,753 INFO L93 Difference]: Finished difference Result 208295 states and 278042 transitions. [2021-01-06 19:47:39,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 205 states. [2021-01-06 19:47:39,754 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 65 [2021-01-06 19:47:39,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:47:40,492 INFO L225 Difference]: With dead ends: 208295 [2021-01-06 19:47:40,493 INFO L226 Difference]: Without dead ends: 197205 [2021-01-06 19:47:40,601 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 217 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20542 ImplicationChecksByTransitivity, 14.6s TimeCoverageRelationStatistics Valid=5056, Invalid=42686, Unknown=0, NotChecked=0, Total=47742 [2021-01-06 19:47:40,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197205 states. [2021-01-06 19:47:47,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197205 to 58813. [2021-01-06 19:47:47,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58813 states. [2021-01-06 19:47:47,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58813 states to 58813 states and 79207 transitions. [2021-01-06 19:47:47,688 INFO L78 Accepts]: Start accepts. Automaton has 58813 states and 79207 transitions. Word has length 65 [2021-01-06 19:47:47,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:47:47,688 INFO L481 AbstractCegarLoop]: Abstraction has 58813 states and 79207 transitions. [2021-01-06 19:47:47,689 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 19:47:47,689 INFO L276 IsEmpty]: Start isEmpty. Operand 58813 states and 79207 transitions. [2021-01-06 19:47:47,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-01-06 19:47:47,692 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:47:47,693 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] [2021-01-06 19:47:47,901 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-01-06 19:47:47,902 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:47:47,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:47:47,903 INFO L82 PathProgramCache]: Analyzing trace with hash 625513838, now seen corresponding path program 1 times [2021-01-06 19:47:47,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:47:47,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368856455] [2021-01-06 19:47:47,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:47:47,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:47:47,958 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 19:47:47,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368856455] [2021-01-06 19:47:47,959 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 19:47:47,959 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 19:47:47,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156466566] [2021-01-06 19:47:47,960 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 19:47:47,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:47:47,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 19:47:47,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 19:47:47,961 INFO L87 Difference]: Start difference. First operand 58813 states and 79207 transitions. Second operand 3 states. [2021-01-06 19:47:52,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:47:52,972 INFO L93 Difference]: Finished difference Result 117604 states and 158391 transitions. [2021-01-06 19:47:52,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 19:47:52,972 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 65 [2021-01-06 19:47:52,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:47:53,083 INFO L225 Difference]: With dead ends: 117604 [2021-01-06 19:47:53,083 INFO L226 Difference]: Without dead ends: 58815 [2021-01-06 19:47:53,169 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 19:47:53,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58815 states. [2021-01-06 19:47:58,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58815 to 57541. [2021-01-06 19:47:58,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57541 states. [2021-01-06 19:47:58,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57541 states to 57541 states and 76027 transitions. [2021-01-06 19:47:58,423 INFO L78 Accepts]: Start accepts. Automaton has 57541 states and 76027 transitions. Word has length 65 [2021-01-06 19:47:58,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:47:58,423 INFO L481 AbstractCegarLoop]: Abstraction has 57541 states and 76027 transitions. [2021-01-06 19:47:58,423 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 19:47:58,423 INFO L276 IsEmpty]: Start isEmpty. Operand 57541 states and 76027 transitions. [2021-01-06 19:47:58,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-01-06 19:47:58,427 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:47:58,427 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] [2021-01-06 19:47:58,427 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-01-06 19:47:58,427 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:47:58,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:47:58,428 INFO L82 PathProgramCache]: Analyzing trace with hash -621993778, now seen corresponding path program 1 times [2021-01-06 19:47:58,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:47:58,428 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479302439] [2021-01-06 19:47:58,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:47:58,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:47:58,469 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 19:47:58,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479302439] [2021-01-06 19:47:58,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 19:47:58,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 19:47:58,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969164552] [2021-01-06 19:47:58,616 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 19:47:58,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:47:58,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 19:47:58,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 19:47:58,617 INFO L87 Difference]: Start difference. First operand 57541 states and 76027 transitions. Second operand 3 states. [2021-01-06 19:48:01,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:48:01,398 INFO L93 Difference]: Finished difference Result 89986 states and 118783 transitions. [2021-01-06 19:48:01,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 19:48:01,399 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 65 [2021-01-06 19:48:01,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:48:01,447 INFO L225 Difference]: With dead ends: 89986 [2021-01-06 19:48:01,448 INFO L226 Difference]: Without dead ends: 32469 [2021-01-06 19:48:01,484 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 19:48:01,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32469 states. [2021-01-06 19:48:04,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32469 to 32467. [2021-01-06 19:48:04,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32467 states. [2021-01-06 19:48:04,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32467 states to 32467 states and 41927 transitions. [2021-01-06 19:48:04,282 INFO L78 Accepts]: Start accepts. Automaton has 32467 states and 41927 transitions. Word has length 65 [2021-01-06 19:48:04,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:48:04,283 INFO L481 AbstractCegarLoop]: Abstraction has 32467 states and 41927 transitions. [2021-01-06 19:48:04,283 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 19:48:04,283 INFO L276 IsEmpty]: Start isEmpty. Operand 32467 states and 41927 transitions. [2021-01-06 19:48:04,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-01-06 19:48:04,284 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:48:04,284 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] [2021-01-06 19:48:04,289 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-01-06 19:48:04,289 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:48:04,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:48:04,290 INFO L82 PathProgramCache]: Analyzing trace with hash -1642879954, now seen corresponding path program 1 times [2021-01-06 19:48:04,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:48:04,291 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664506223] [2021-01-06 19:48:04,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:48:04,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:48:04,332 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 19:48:04,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664506223] [2021-01-06 19:48:04,333 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 19:48:04,333 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 19:48:04,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382442509] [2021-01-06 19:48:04,334 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 19:48:04,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:48:04,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 19:48:04,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 19:48:04,335 INFO L87 Difference]: Start difference. First operand 32467 states and 41927 transitions. Second operand 3 states. [2021-01-06 19:48:05,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:48:05,575 INFO L93 Difference]: Finished difference Result 45562 states and 58892 transitions. [2021-01-06 19:48:05,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 19:48:05,576 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 65 [2021-01-06 19:48:05,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:48:05,589 INFO L225 Difference]: With dead ends: 45562 [2021-01-06 19:48:05,589 INFO L226 Difference]: Without dead ends: 13119 [2021-01-06 19:48:05,608 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 19:48:05,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13119 states. [2021-01-06 19:48:06,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13119 to 12223. [2021-01-06 19:48:06,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12223 states. [2021-01-06 19:48:06,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12223 states to 12223 states and 15637 transitions. [2021-01-06 19:48:06,808 INFO L78 Accepts]: Start accepts. Automaton has 12223 states and 15637 transitions. Word has length 65 [2021-01-06 19:48:06,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:48:06,808 INFO L481 AbstractCegarLoop]: Abstraction has 12223 states and 15637 transitions. [2021-01-06 19:48:06,808 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 19:48:06,808 INFO L276 IsEmpty]: Start isEmpty. Operand 12223 states and 15637 transitions. [2021-01-06 19:48:06,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-01-06 19:48:06,810 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:48:06,810 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] [2021-01-06 19:48:06,810 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-01-06 19:48:06,810 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:48:06,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:48:06,810 INFO L82 PathProgramCache]: Analyzing trace with hash 224764346, now seen corresponding path program 1 times [2021-01-06 19:48:06,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:48:06,811 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975551832] [2021-01-06 19:48:06,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:48:06,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:48:06,871 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-01-06 19:48:06,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975551832] [2021-01-06 19:48:06,872 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 19:48:06,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 19:48:06,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109010342] [2021-01-06 19:48:06,873 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 19:48:06,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:48:06,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 19:48:06,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-01-06 19:48:06,874 INFO L87 Difference]: Start difference. First operand 12223 states and 15637 transitions. Second operand 6 states. [2021-01-06 19:48:07,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:48:07,560 INFO L93 Difference]: Finished difference Result 20403 states and 26243 transitions. [2021-01-06 19:48:07,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 19:48:07,561 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 65 [2021-01-06 19:48:07,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:48:07,571 INFO L225 Difference]: With dead ends: 20403 [2021-01-06 19:48:07,571 INFO L226 Difference]: Without dead ends: 8243 [2021-01-06 19:48:07,578 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 [2021-01-06 19:48:07,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8243 states. [2021-01-06 19:48:08,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8243 to 8243. [2021-01-06 19:48:08,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8243 states. [2021-01-06 19:48:08,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8243 states to 8243 states and 10468 transitions. [2021-01-06 19:48:08,341 INFO L78 Accepts]: Start accepts. Automaton has 8243 states and 10468 transitions. Word has length 65 [2021-01-06 19:48:08,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:48:08,341 INFO L481 AbstractCegarLoop]: Abstraction has 8243 states and 10468 transitions. [2021-01-06 19:48:08,342 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 19:48:08,342 INFO L276 IsEmpty]: Start isEmpty. Operand 8243 states and 10468 transitions. [2021-01-06 19:48:08,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-01-06 19:48:08,343 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:48:08,343 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] [2021-01-06 19:48:08,343 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-01-06 19:48:08,343 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:48:08,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:48:08,344 INFO L82 PathProgramCache]: Analyzing trace with hash 67059962, now seen corresponding path program 1 times [2021-01-06 19:48:08,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:48:08,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534814042] [2021-01-06 19:48:08,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:48:08,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:48:08,435 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-01-06 19:48:08,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534814042] [2021-01-06 19:48:08,435 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 19:48:08,435 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-01-06 19:48:08,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494951689] [2021-01-06 19:48:08,439 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 19:48:08,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:48:08,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 19:48:08,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-01-06 19:48:08,443 INFO L87 Difference]: Start difference. First operand 8243 states and 10468 transitions. Second operand 7 states. [2021-01-06 19:48:09,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:48:09,306 INFO L93 Difference]: Finished difference Result 15342 states and 19574 transitions. [2021-01-06 19:48:09,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 19:48:09,306 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 65 [2021-01-06 19:48:09,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:48:09,314 INFO L225 Difference]: With dead ends: 15342 [2021-01-06 19:48:09,314 INFO L226 Difference]: Without dead ends: 7210 [2021-01-06 19:48:09,319 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 [2021-01-06 19:48:09,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7210 states. [2021-01-06 19:48:09,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7210 to 7208. [2021-01-06 19:48:09,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7208 states. [2021-01-06 19:48:10,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7208 states to 7208 states and 9149 transitions. [2021-01-06 19:48:10,003 INFO L78 Accepts]: Start accepts. Automaton has 7208 states and 9149 transitions. Word has length 65 [2021-01-06 19:48:10,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:48:10,003 INFO L481 AbstractCegarLoop]: Abstraction has 7208 states and 9149 transitions. [2021-01-06 19:48:10,004 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 19:48:10,004 INFO L276 IsEmpty]: Start isEmpty. Operand 7208 states and 9149 transitions. [2021-01-06 19:48:10,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-01-06 19:48:10,004 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:48:10,004 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] [2021-01-06 19:48:10,005 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-01-06 19:48:10,005 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:48:10,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:48:10,005 INFO L82 PathProgramCache]: Analyzing trace with hash -1467200301, now seen corresponding path program 1 times [2021-01-06 19:48:10,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:48:10,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867527178] [2021-01-06 19:48:10,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:48:10,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:48:10,989 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 19:48:10,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867527178] [2021-01-06 19:48:10,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263933459] [2021-01-06 19:48:10,990 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 [2021-01-06 19:48:11,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:48:11,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 24 conjunts are in the unsatisfiable core [2021-01-06 19:48:11,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:48:11,520 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 19:48:12,308 WARN L197 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 46 [2021-01-06 19:48:12,945 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2021-01-06 19:48:12,999 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 19:48:13,000 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:48:13,000 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 12] total 33 [2021-01-06 19:48:13,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711858294] [2021-01-06 19:48:13,001 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-01-06 19:48:13,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:48:13,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-01-06 19:48:13,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=979, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 19:48:13,002 INFO L87 Difference]: Start difference. First operand 7208 states and 9149 transitions. Second operand 33 states. [2021-01-06 19:48:13,427 WARN L197 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 81 [2021-01-06 19:48:14,605 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 28 [2021-01-06 19:48:14,853 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 33 [2021-01-06 19:48:15,071 WARN L197 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2021-01-06 19:48:15,354 WARN L197 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 61 [2021-01-06 19:48:15,655 WARN L197 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 58 [2021-01-06 19:48:16,048 WARN L197 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 72 [2021-01-06 19:48:16,654 WARN L197 SmtUtils]: Spent 479.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 97 [2021-01-06 19:48:17,108 WARN L197 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 80 [2021-01-06 19:48:17,531 WARN L197 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 80 [2021-01-06 19:48:17,954 WARN L197 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 63 [2021-01-06 19:48:18,407 WARN L197 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 87 [2021-01-06 19:48:18,773 WARN L197 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2021-01-06 19:48:19,203 WARN L197 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 77 [2021-01-06 19:48:19,623 WARN L197 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 74 [2021-01-06 19:48:20,053 WARN L197 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 85 [2021-01-06 19:48:20,472 WARN L197 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 67 [2021-01-06 19:48:20,797 WARN L197 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 73 [2021-01-06 19:48:21,290 WARN L197 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 72 [2021-01-06 19:48:21,594 WARN L197 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 66 [2021-01-06 19:48:21,865 WARN L197 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 64 [2021-01-06 19:48:22,231 WARN L197 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 61 [2021-01-06 19:48:22,596 WARN L197 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 74 [2021-01-06 19:48:22,907 WARN L197 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2021-01-06 19:48:23,296 WARN L197 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 69 [2021-01-06 19:48:23,566 WARN L197 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2021-01-06 19:48:23,906 WARN L197 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2021-01-06 19:48:24,234 WARN L197 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 61 [2021-01-06 19:48:24,902 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2021-01-06 19:48:25,695 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2021-01-06 19:48:26,169 WARN L197 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 64 [2021-01-06 19:48:26,376 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2021-01-06 19:48:26,662 WARN L197 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 64 [2021-01-06 19:48:27,001 WARN L197 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 72 [2021-01-06 19:48:27,335 WARN L197 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 72 [2021-01-06 19:48:29,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:48:29,863 INFO L93 Difference]: Finished difference Result 23420 states and 29745 transitions. [2021-01-06 19:48:29,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-01-06 19:48:29,864 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 66 [2021-01-06 19:48:29,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:48:29,887 INFO L225 Difference]: With dead ends: 23420 [2021-01-06 19:48:29,887 INFO L226 Difference]: Without dead ends: 18513 [2021-01-06 19:48:29,895 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1391 ImplicationChecksByTransitivity, 14.4s TimeCoverageRelationStatistics Valid=1049, Invalid=5593, Unknown=0, NotChecked=0, Total=6642 [2021-01-06 19:48:29,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18513 states. [2021-01-06 19:48:30,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18513 to 7635. [2021-01-06 19:48:30,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7635 states. [2021-01-06 19:48:30,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7635 states to 7635 states and 9806 transitions. [2021-01-06 19:48:30,704 INFO L78 Accepts]: Start accepts. Automaton has 7635 states and 9806 transitions. Word has length 66 [2021-01-06 19:48:30,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:48:30,704 INFO L481 AbstractCegarLoop]: Abstraction has 7635 states and 9806 transitions. [2021-01-06 19:48:30,704 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2021-01-06 19:48:30,705 INFO L276 IsEmpty]: Start isEmpty. Operand 7635 states and 9806 transitions. [2021-01-06 19:48:30,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-01-06 19:48:30,705 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:48:30,705 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] [2021-01-06 19:48:30,906 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:48:30,906 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:48:30,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:48:30,907 INFO L82 PathProgramCache]: Analyzing trace with hash 395112077, now seen corresponding path program 1 times [2021-01-06 19:48:30,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:48:30,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207137107] [2021-01-06 19:48:30,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:48:30,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:48:32,119 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 19:48:32,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207137107] [2021-01-06 19:48:32,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347135446] [2021-01-06 19:48:32,120 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 [2021-01-06 19:48:32,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:48:32,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-06 19:48:32,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:48:32,673 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 19:48:33,117 WARN L197 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 34 [2021-01-06 19:48:33,722 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 19:48:33,722 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:48:33,722 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 12] total 33 [2021-01-06 19:48:33,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953391018] [2021-01-06 19:48:33,723 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-01-06 19:48:33,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:48:33,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-01-06 19:48:33,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=969, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 19:48:33,724 INFO L87 Difference]: Start difference. First operand 7635 states and 9806 transitions. Second operand 33 states. [2021-01-06 19:48:33,955 WARN L197 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2021-01-06 19:48:34,910 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2021-01-06 19:48:35,270 WARN L197 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2021-01-06 19:48:35,776 WARN L197 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 73 [2021-01-06 19:48:36,363 WARN L197 SmtUtils]: Spent 438.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 81 [2021-01-06 19:48:37,072 WARN L197 SmtUtils]: Spent 530.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 83 [2021-01-06 19:48:37,892 WARN L197 SmtUtils]: Spent 662.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 98 [2021-01-06 19:48:38,643 WARN L197 SmtUtils]: Spent 578.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 93 [2021-01-06 19:48:39,092 WARN L197 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 76 [2021-01-06 19:48:39,540 WARN L197 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 76 [2021-01-06 19:48:39,966 WARN L197 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 59 [2021-01-06 19:48:40,304 WARN L197 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2021-01-06 19:48:40,618 WARN L197 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2021-01-06 19:48:40,810 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2021-01-06 19:48:41,377 WARN L197 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2021-01-06 19:48:41,602 WARN L197 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 51 [2021-01-06 19:48:44,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:48:44,189 INFO L93 Difference]: Finished difference Result 15691 states and 20335 transitions. [2021-01-06 19:48:44,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-01-06 19:48:44,191 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 66 [2021-01-06 19:48:44,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:48:44,206 INFO L225 Difference]: With dead ends: 15691 [2021-01-06 19:48:44,206 INFO L226 Difference]: Without dead ends: 12156 [2021-01-06 19:48:44,212 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 [2021-01-06 19:48:44,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12156 states. [2021-01-06 19:48:45,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12156 to 7442. [2021-01-06 19:48:45,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7442 states. [2021-01-06 19:48:45,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7442 states to 7442 states and 9586 transitions. [2021-01-06 19:48:45,115 INFO L78 Accepts]: Start accepts. Automaton has 7442 states and 9586 transitions. Word has length 66 [2021-01-06 19:48:45,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:48:45,115 INFO L481 AbstractCegarLoop]: Abstraction has 7442 states and 9586 transitions. [2021-01-06 19:48:45,115 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2021-01-06 19:48:45,115 INFO L276 IsEmpty]: Start isEmpty. Operand 7442 states and 9586 transitions. [2021-01-06 19:48:45,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-01-06 19:48:45,116 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:48:45,116 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] [2021-01-06 19:48:45,330 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-01-06 19:48:45,331 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:48:45,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:48:45,332 INFO L82 PathProgramCache]: Analyzing trace with hash 855365469, now seen corresponding path program 1 times [2021-01-06 19:48:45,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:48:45,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541189139] [2021-01-06 19:48:45,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:48:45,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:48:46,536 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 19:48:46,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541189139] [2021-01-06 19:48:46,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653928552] [2021-01-06 19:48:46,537 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 [2021-01-06 19:48:46,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:48:46,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 21 conjunts are in the unsatisfiable core [2021-01-06 19:48:46,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:48:47,147 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 19:48:47,595 WARN L197 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 44 [2021-01-06 19:48:48,317 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 35 [2021-01-06 19:48:48,374 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 19:48:48,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:48:48,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 12] total 32 [2021-01-06 19:48:48,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382152093] [2021-01-06 19:48:48,375 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-01-06 19:48:48,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:48:48,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-01-06 19:48:48,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=915, Unknown=0, NotChecked=0, Total=992 [2021-01-06 19:48:48,376 INFO L87 Difference]: Start difference. First operand 7442 states and 9586 transitions. Second operand 32 states. [2021-01-06 19:48:48,747 WARN L197 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 73 [2021-01-06 19:48:49,918 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 26 [2021-01-06 19:48:50,186 WARN L197 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 30 [2021-01-06 19:48:50,451 WARN L197 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 40 [2021-01-06 19:48:50,811 WARN L197 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 53 [2021-01-06 19:48:51,318 WARN L197 SmtUtils]: Spent 405.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 83 [2021-01-06 19:48:51,909 WARN L197 SmtUtils]: Spent 463.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 94 [2021-01-06 19:48:52,557 WARN L197 SmtUtils]: Spent 525.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 91 [2021-01-06 19:48:52,991 WARN L197 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 76 [2021-01-06 19:48:53,452 WARN L197 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 76 [2021-01-06 19:48:53,934 WARN L197 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 76 [2021-01-06 19:48:54,324 WARN L197 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 72 [2021-01-06 19:48:54,671 WARN L197 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 68 [2021-01-06 19:48:54,969 WARN L197 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2021-01-06 19:48:55,460 WARN L197 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 45 [2021-01-06 19:48:55,796 WARN L197 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 62 [2021-01-06 19:48:56,178 WARN L197 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 45 [2021-01-06 19:48:56,515 WARN L197 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 62 [2021-01-06 19:48:56,872 WARN L197 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2021-01-06 19:48:57,383 WARN L197 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2021-01-06 19:48:57,732 WARN L197 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 50 [2021-01-06 19:48:59,026 WARN L197 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 65 [2021-01-06 19:48:59,721 WARN L197 SmtUtils]: Spent 433.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 90 [2021-01-06 19:49:00,119 WARN L197 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2021-01-06 19:49:00,481 WARN L197 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2021-01-06 19:49:00,992 WARN L197 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 82 [2021-01-06 19:49:03,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:49:03,885 INFO L93 Difference]: Finished difference Result 24176 states and 31344 transitions. [2021-01-06 19:49:03,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-01-06 19:49:03,887 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 67 [2021-01-06 19:49:03,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:49:03,907 INFO L225 Difference]: With dead ends: 24176 [2021-01-06 19:49:03,907 INFO L226 Difference]: Without dead ends: 18404 [2021-01-06 19:49:03,914 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 701 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=626, Invalid=3534, Unknown=0, NotChecked=0, Total=4160 [2021-01-06 19:49:03,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18404 states. [2021-01-06 19:49:04,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18404 to 6648. [2021-01-06 19:49:04,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6648 states. [2021-01-06 19:49:04,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6648 states to 6648 states and 8576 transitions. [2021-01-06 19:49:04,707 INFO L78 Accepts]: Start accepts. Automaton has 6648 states and 8576 transitions. Word has length 67 [2021-01-06 19:49:04,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:49:04,707 INFO L481 AbstractCegarLoop]: Abstraction has 6648 states and 8576 transitions. [2021-01-06 19:49:04,707 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2021-01-06 19:49:04,707 INFO L276 IsEmpty]: Start isEmpty. Operand 6648 states and 8576 transitions. [2021-01-06 19:49:04,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-01-06 19:49:04,711 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:49:04,711 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] [2021-01-06 19:49:04,926 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:49:04,927 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:49:04,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:49:04,928 INFO L82 PathProgramCache]: Analyzing trace with hash -1441412763, now seen corresponding path program 1 times [2021-01-06 19:49:04,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:49:04,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529615580] [2021-01-06 19:49:04,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:49:04,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:49:05,004 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-01-06 19:49:05,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529615580] [2021-01-06 19:49:05,005 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 19:49:05,005 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 19:49:05,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836401767] [2021-01-06 19:49:05,005 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 19:49:05,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:49:05,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 19:49:05,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 19:49:05,006 INFO L87 Difference]: Start difference. First operand 6648 states and 8576 transitions. Second operand 5 states. [2021-01-06 19:49:06,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:49:06,169 INFO L93 Difference]: Finished difference Result 14081 states and 18286 transitions. [2021-01-06 19:49:06,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 19:49:06,171 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 111 [2021-01-06 19:49:06,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:49:06,178 INFO L225 Difference]: With dead ends: 14081 [2021-01-06 19:49:06,178 INFO L226 Difference]: Without dead ends: 7622 [2021-01-06 19:49:06,182 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 [2021-01-06 19:49:06,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7622 states. [2021-01-06 19:49:06,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7622 to 3626. [2021-01-06 19:49:06,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3626 states. [2021-01-06 19:49:06,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3626 states to 3626 states and 4606 transitions. [2021-01-06 19:49:06,735 INFO L78 Accepts]: Start accepts. Automaton has 3626 states and 4606 transitions. Word has length 111 [2021-01-06 19:49:06,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:49:06,736 INFO L481 AbstractCegarLoop]: Abstraction has 3626 states and 4606 transitions. [2021-01-06 19:49:06,736 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 19:49:06,736 INFO L276 IsEmpty]: Start isEmpty. Operand 3626 states and 4606 transitions. [2021-01-06 19:49:06,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-01-06 19:49:06,738 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:49:06,738 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] [2021-01-06 19:49:06,739 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-01-06 19:49:06,739 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:49:06,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:49:06,739 INFO L82 PathProgramCache]: Analyzing trace with hash -1865059485, now seen corresponding path program 1 times [2021-01-06 19:49:06,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:49:06,739 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575127867] [2021-01-06 19:49:06,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:49:06,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:49:07,381 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 22 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 19:49:07,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575127867] [2021-01-06 19:49:07,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8859723] [2021-01-06 19:49:07,381 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 [2021-01-06 19:49:07,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:49:07,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 22 conjunts are in the unsatisfiable core [2021-01-06 19:49:07,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:49:08,370 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2021-01-06 19:49:08,541 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 19:49:08,907 INFO L757 QuantifierPusher]: Run 20 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 19:49:09,824 INFO L757 QuantifierPusher]: Run 30 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 19:49:10,998 INFO L757 QuantifierPusher]: Run 40 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 19:49:12,749 INFO L757 QuantifierPusher]: Run 50 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 19:49:16,800 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 19:49:16,827 INFO L757 QuantifierPusher]: Run 20 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 19:49:18,838 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 19:49:41,419 WARN L197 SmtUtils]: Spent 1.65 s on a formula simplification. DAG size of input: 458 DAG size of output: 398 [2021-01-06 19:50:09,652 WARN L197 SmtUtils]: Spent 1.98 s on a formula simplification that was a NOOP. DAG size: 398