/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 11:03:41,526 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 11:03:41,529 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 11:03:41,567 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 11:03:41,568 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 11:03:41,569 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 11:03:41,571 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 11:03:41,574 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 11:03:41,576 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 11:03:41,577 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 11:03:41,578 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 11:03:41,580 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 11:03:41,580 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 11:03:41,582 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 11:03:41,583 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 11:03:41,585 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 11:03:41,599 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 11:03:41,601 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 11:03:41,603 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 11:03:41,606 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 11:03:41,608 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 11:03:41,610 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 11:03:41,611 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 11:03:41,612 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 11:03:41,616 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-23 11:03:41,616 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-23 11:03:41,617 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-23 11:03:41,618 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-23 11:03:41,619 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-23 11:03:41,623 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-23 11:03:41,624 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 11:03:41,627 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 11:03:41,629 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 11:03:41,634 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 11:03:41,636 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 11:03:41,637 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 11:03:41,638 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 11:03:41,638 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 11:03:41,639 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 11:03:41,644 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 11:03:41,645 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 11:03:41,646 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 11:03:41,706 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 11:03:41,707 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 11:03:41,710 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 11:03:41,710 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 11:03:41,710 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 11:03:41,711 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 11:03:41,713 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 11:03:41,713 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 11:03:41,713 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 11:03:41,714 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 11:03:41,715 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 11:03:41,716 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 11:03:41,716 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 11:03:41,716 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 11:03:41,717 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 11:03:41,717 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 11:03:41,718 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 11:03:41,718 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 11:03:41,718 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 11:03:41,719 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 11:03:41,719 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 11:03:41,719 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 11:03:41,720 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 11:03:41,720 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 11:03:41,720 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 11:03:41,721 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 11:03:42,153 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 11:03:42,183 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 11:03:42,186 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 11:03:42,187 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 11:03:42,188 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 11:03:42,189 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2020-12-23 11:03:42,271 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/dca926fc6/0f7760b3959d4b49bf2e72924c6b92e2/FLAG1764a7811 [2020-12-23 11:03:42,915 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 11:03:42,916 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2020-12-23 11:03:42,926 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/dca926fc6/0f7760b3959d4b49bf2e72924c6b92e2/FLAG1764a7811 [2020-12-23 11:03:43,261 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/dca926fc6/0f7760b3959d4b49bf2e72924c6b92e2 [2020-12-23 11:03:43,265 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 11:03:43,267 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 11:03:43,269 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 11:03:43,269 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 11:03:43,273 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 11:03:43,274 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 11:03:43" (1/1) ... [2020-12-23 11:03:43,275 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@114e5897 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 11:03:43, skipping insertion in model container [2020-12-23 11:03:43,276 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 11:03:43" (1/1) ... [2020-12-23 11:03:43,284 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 11:03:43,321 INFO L178 MainTranslator]: Built tables and reachable declarations left hand side expression in assignment: lhs: VariableLHS[~main__c1~0,] left hand side expression in assignment: lhs: VariableLHS[~r1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~id1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~st1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~id2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~st2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~id3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~st3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~id4~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~st4~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send4~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode4~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~init__tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~__return_2937~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~main__i2~0,] left hand side expression in assignment: lhs: VariableLHS[~p1_old~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p1_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p2_old~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p2_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p3_old~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p3_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p4_old~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p4_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~main__i2~0,] left hand side expression in assignment: lhs: VariableLHS[~node1__m1~0,] left hand side expression in assignment: lhs: VariableLHS[~r1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~node1__m1~0,] left hand side expression in assignment: lhs: VariableLHS[~p4_old~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~node2__m2~0,] left hand side expression in assignment: lhs: VariableLHS[~node2__m2~0,] left hand side expression in assignment: lhs: VariableLHS[~p1_old~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~node3__m3~0,] left hand side expression in assignment: lhs: VariableLHS[~node3__m3~0,] left hand side expression in assignment: lhs: VariableLHS[~p2_old~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~node4__m4~0,] left hand side expression in assignment: lhs: VariableLHS[~node4__m4~0,] left hand side expression in assignment: lhs: VariableLHS[~p3_old~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send4~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode4~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p1_old~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p1_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p2_old~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p2_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p3_old~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p3_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p4_old~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p4_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~check__tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~__return_3032~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~main__c1~0,] left hand side expression in assignment: lhs: VariableLHS[~__tmp_1~0,] left hand side expression in assignment: lhs: VariableLHS[~assert__arg~0,] [2020-12-23 11:03:43,536 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c[4498,4511] left hand side expression in assignment: lhs: VariableLHS[~main__i2~0,] left hand side expression in assignment: lhs: VariableLHS[~check__tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~check__tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~check__tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~check__tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~st4~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~node4____CPAchecker_TMP_0~0,] left hand side expression in assignment: lhs: VariableLHS[~p4_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode4~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~node4____CPAchecker_TMP_0~0,] left hand side expression in assignment: lhs: VariableLHS[~st3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~node3____CPAchecker_TMP_0~0,] left hand side expression in assignment: lhs: VariableLHS[~p3_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~node3____CPAchecker_TMP_0~0,] left hand side expression in assignment: lhs: VariableLHS[~st2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~node2____CPAchecker_TMP_0~0,] left hand side expression in assignment: lhs: VariableLHS[~p2_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~node2____CPAchecker_TMP_0~0,] left hand side expression in assignment: lhs: VariableLHS[~st1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~node1____CPAchecker_TMP_0~0,] left hand side expression in assignment: lhs: VariableLHS[~p1_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~node1____CPAchecker_TMP_0~0,] left hand side expression in assignment: lhs: VariableLHS[~__return_3101~0,GLOBAL] [2020-12-23 11:03:43,564 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 11:03:43,594 INFO L203 MainTranslator]: Completed pre-run left hand side expression in assignment: lhs: VariableLHS[~main__c1~0,] left hand side expression in assignment: lhs: VariableLHS[~r1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~id1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~st1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~id2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~st2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~id3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~st3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~id4~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~st4~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send4~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode4~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~init__tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~__return_2937~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~main__i2~0,] left hand side expression in assignment: lhs: VariableLHS[~p1_old~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p1_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p2_old~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p2_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p3_old~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p3_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p4_old~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p4_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~main__i2~0,] left hand side expression in assignment: lhs: VariableLHS[~node1__m1~0,] left hand side expression in assignment: lhs: VariableLHS[~r1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~node1__m1~0,] left hand side expression in assignment: lhs: VariableLHS[~p4_old~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~node2__m2~0,] left hand side expression in assignment: lhs: VariableLHS[~node2__m2~0,] left hand side expression in assignment: lhs: VariableLHS[~p1_old~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~node3__m3~0,] left hand side expression in assignment: lhs: VariableLHS[~node3__m3~0,] left hand side expression in assignment: lhs: VariableLHS[~p2_old~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~node4__m4~0,] left hand side expression in assignment: lhs: VariableLHS[~node4__m4~0,] left hand side expression in assignment: lhs: VariableLHS[~p3_old~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send4~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode4~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p1_old~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p1_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p2_old~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p2_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p3_old~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p3_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p4_old~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p4_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~check__tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~__return_3032~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~main__c1~0,] left hand side expression in assignment: lhs: VariableLHS[~__tmp_1~0,] left hand side expression in assignment: lhs: VariableLHS[~assert__arg~0,] [2020-12-23 11:03:43,688 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c[4498,4511] left hand side expression in assignment: lhs: VariableLHS[~main__i2~0,] left hand side expression in assignment: lhs: VariableLHS[~check__tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~check__tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~check__tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~check__tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~st4~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~node4____CPAchecker_TMP_0~0,] left hand side expression in assignment: lhs: VariableLHS[~p4_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode4~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~node4____CPAchecker_TMP_0~0,] left hand side expression in assignment: lhs: VariableLHS[~st3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~node3____CPAchecker_TMP_0~0,] left hand side expression in assignment: lhs: VariableLHS[~p3_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~node3____CPAchecker_TMP_0~0,] left hand side expression in assignment: lhs: VariableLHS[~st2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~node2____CPAchecker_TMP_0~0,] left hand side expression in assignment: lhs: VariableLHS[~p2_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~node2____CPAchecker_TMP_0~0,] left hand side expression in assignment: lhs: VariableLHS[~st1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~node1____CPAchecker_TMP_0~0,] left hand side expression in assignment: lhs: VariableLHS[~p1_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~node1____CPAchecker_TMP_0~0,] left hand side expression in assignment: lhs: VariableLHS[~__return_3101~0,GLOBAL] [2020-12-23 11:03:43,722 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 11:03:43,772 INFO L208 MainTranslator]: Completed translation [2020-12-23 11:03:43,772 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 11:03:43 WrapperNode [2020-12-23 11:03:43,773 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 11:03:43,776 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 11:03:43,776 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 11:03:43,776 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 11:03:43,788 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 11:03:43" (1/1) ... [2020-12-23 11:03:43,824 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 11:03:43" (1/1) ... [2020-12-23 11:03:43,869 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 11:03:43,870 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 11:03:43,870 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 11:03:43,870 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 11:03:43,881 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 11:03:43" (1/1) ... [2020-12-23 11:03:43,881 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 11:03:43" (1/1) ... [2020-12-23 11:03:43,884 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 11:03:43" (1/1) ... [2020-12-23 11:03:43,885 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 11:03:43" (1/1) ... [2020-12-23 11:03:43,892 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 11:03:43" (1/1) ... [2020-12-23 11:03:43,897 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 11:03:43" (1/1) ... [2020-12-23 11:03:43,900 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 11:03:43" (1/1) ... [2020-12-23 11:03:43,906 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 11:03:43,907 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 11:03:43,907 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 11:03:43,907 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 11:03:43,908 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 11:03:43" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 11:03:44,039 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 11:03:44,041 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 11:03:44,041 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 11:03:44,041 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 11:03:44,882 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 11:03:44,882 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-23 11:03:44,884 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 11:03:44 BoogieIcfgContainer [2020-12-23 11:03:44,884 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 11:03:44,886 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 11:03:44,887 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 11:03:44,891 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 11:03:44,891 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 11:03:43" (1/3) ... [2020-12-23 11:03:44,892 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5be896d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 11:03:44, skipping insertion in model container [2020-12-23 11:03:44,892 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 11:03:43" (2/3) ... [2020-12-23 11:03:44,893 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5be896d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 11:03:44, skipping insertion in model container [2020-12-23 11:03:44,893 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 11:03:44" (3/3) ... [2020-12-23 11:03:44,895 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2020-12-23 11:03:44,902 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 11:03:44,910 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 11:03:44,930 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 11:03:44,960 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 11:03:44,960 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 11:03:44,960 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 11:03:44,960 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 11:03:44,960 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 11:03:44,961 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 11:03:44,961 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 11:03:44,961 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 11:03:44,978 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states. [2020-12-23 11:03:44,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-12-23 11:03:44,986 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 11:03:44,987 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 11:03:44,988 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 11:03:44,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 11:03:44,995 INFO L82 PathProgramCache]: Analyzing trace with hash -347547403, now seen corresponding path program 1 times [2020-12-23 11:03:45,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 11:03:45,006 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112829667] [2020-12-23 11:03:45,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 11:03:45,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 11:03:45,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 11:03:45,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112829667] [2020-12-23 11:03:45,442 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 11:03:45,443 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 11:03:45,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037412555] [2020-12-23 11:03:45,449 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 11:03:45,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 11:03:45,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 11:03:45,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 11:03:45,469 INFO L87 Difference]: Start difference. First operand 79 states. Second operand 3 states. [2020-12-23 11:03:45,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 11:03:45,543 INFO L93 Difference]: Finished difference Result 177 states and 286 transitions. [2020-12-23 11:03:45,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 11:03:45,545 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 47 [2020-12-23 11:03:45,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 11:03:45,558 INFO L225 Difference]: With dead ends: 177 [2020-12-23 11:03:45,558 INFO L226 Difference]: Without dead ends: 118 [2020-12-23 11:03:45,562 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 11:03:45,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-12-23 11:03:45,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 116. [2020-12-23 11:03:45,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-12-23 11:03:45,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 169 transitions. [2020-12-23 11:03:45,624 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 169 transitions. Word has length 47 [2020-12-23 11:03:45,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 11:03:45,625 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 169 transitions. [2020-12-23 11:03:45,625 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 11:03:45,625 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 169 transitions. [2020-12-23 11:03:45,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-23 11:03:45,629 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 11:03:45,629 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 11:03:45,629 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 11:03:45,630 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 11:03:45,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 11:03:45,633 INFO L82 PathProgramCache]: Analyzing trace with hash -391185874, now seen corresponding path program 1 times [2020-12-23 11:03:45,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 11:03:45,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933600174] [2020-12-23 11:03:45,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 11:03:45,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 11:03:45,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 11:03:45,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933600174] [2020-12-23 11:03:45,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 11:03:45,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 11:03:45,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941919096] [2020-12-23 11:03:45,853 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 11:03:45,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 11:03:45,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 11:03:45,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 11:03:45,857 INFO L87 Difference]: Start difference. First operand 116 states and 169 transitions. Second operand 3 states. [2020-12-23 11:03:45,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 11:03:45,906 INFO L93 Difference]: Finished difference Result 280 states and 429 transitions. [2020-12-23 11:03:45,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 11:03:45,907 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 48 [2020-12-23 11:03:45,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 11:03:45,910 INFO L225 Difference]: With dead ends: 280 [2020-12-23 11:03:45,910 INFO L226 Difference]: Without dead ends: 190 [2020-12-23 11:03:45,912 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 11:03:45,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-12-23 11:03:45,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 188. [2020-12-23 11:03:45,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-12-23 11:03:45,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 283 transitions. [2020-12-23 11:03:45,943 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 283 transitions. Word has length 48 [2020-12-23 11:03:45,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 11:03:45,944 INFO L481 AbstractCegarLoop]: Abstraction has 188 states and 283 transitions. [2020-12-23 11:03:45,944 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 11:03:45,944 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 283 transitions. [2020-12-23 11:03:45,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-23 11:03:45,946 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 11:03:45,946 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 11:03:45,946 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 11:03:45,947 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 11:03:45,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 11:03:45,948 INFO L82 PathProgramCache]: Analyzing trace with hash -2047730124, now seen corresponding path program 1 times [2020-12-23 11:03:45,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 11:03:45,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875275532] [2020-12-23 11:03:45,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 11:03:45,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 11:03:46,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 11:03:46,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875275532] [2020-12-23 11:03:46,087 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 11:03:46,087 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 11:03:46,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999744922] [2020-12-23 11:03:46,088 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 11:03:46,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 11:03:46,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 11:03:46,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 11:03:46,090 INFO L87 Difference]: Start difference. First operand 188 states and 283 transitions. Second operand 3 states. [2020-12-23 11:03:46,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 11:03:46,139 INFO L93 Difference]: Finished difference Result 480 states and 745 transitions. [2020-12-23 11:03:46,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 11:03:46,140 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 49 [2020-12-23 11:03:46,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 11:03:46,144 INFO L225 Difference]: With dead ends: 480 [2020-12-23 11:03:46,144 INFO L226 Difference]: Without dead ends: 318 [2020-12-23 11:03:46,145 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 11:03:46,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2020-12-23 11:03:46,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 316. [2020-12-23 11:03:46,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 316 states. [2020-12-23 11:03:46,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 483 transitions. [2020-12-23 11:03:46,188 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 483 transitions. Word has length 49 [2020-12-23 11:03:46,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 11:03:46,189 INFO L481 AbstractCegarLoop]: Abstraction has 316 states and 483 transitions. [2020-12-23 11:03:46,189 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 11:03:46,189 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 483 transitions. [2020-12-23 11:03:46,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-23 11:03:46,191 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 11:03:46,191 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 11:03:46,191 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-23 11:03:46,191 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 11:03:46,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 11:03:46,192 INFO L82 PathProgramCache]: Analyzing trace with hash -415311335, now seen corresponding path program 1 times [2020-12-23 11:03:46,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 11:03:46,193 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712914440] [2020-12-23 11:03:46,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 11:03:46,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 11:03:46,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 11:03:46,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712914440] [2020-12-23 11:03:46,333 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 11:03:46,333 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 11:03:46,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686584114] [2020-12-23 11:03:46,333 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 11:03:46,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 11:03:46,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 11:03:46,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 11:03:46,336 INFO L87 Difference]: Start difference. First operand 316 states and 483 transitions. Second operand 3 states. [2020-12-23 11:03:46,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 11:03:46,395 INFO L93 Difference]: Finished difference Result 832 states and 1293 transitions. [2020-12-23 11:03:46,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 11:03:46,396 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 50 [2020-12-23 11:03:46,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 11:03:46,400 INFO L225 Difference]: With dead ends: 832 [2020-12-23 11:03:46,400 INFO L226 Difference]: Without dead ends: 542 [2020-12-23 11:03:46,402 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 11:03:46,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2020-12-23 11:03:46,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 540. [2020-12-23 11:03:46,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 540 states. [2020-12-23 11:03:46,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 827 transitions. [2020-12-23 11:03:46,469 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 827 transitions. Word has length 50 [2020-12-23 11:03:46,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 11:03:46,470 INFO L481 AbstractCegarLoop]: Abstraction has 540 states and 827 transitions. [2020-12-23 11:03:46,470 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 11:03:46,470 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 827 transitions. [2020-12-23 11:03:46,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-23 11:03:46,472 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 11:03:46,472 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 11:03:46,472 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-23 11:03:46,472 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 11:03:46,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 11:03:46,473 INFO L82 PathProgramCache]: Analyzing trace with hash -103942672, now seen corresponding path program 1 times [2020-12-23 11:03:46,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 11:03:46,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877480378] [2020-12-23 11:03:46,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 11:03:46,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 11:03:46,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 11:03:46,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877480378] [2020-12-23 11:03:46,576 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 11:03:46,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 11:03:46,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753794022] [2020-12-23 11:03:46,577 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 11:03:46,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 11:03:46,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 11:03:46,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-23 11:03:46,579 INFO L87 Difference]: Start difference. First operand 540 states and 827 transitions. Second operand 5 states. [2020-12-23 11:03:46,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 11:03:46,852 INFO L93 Difference]: Finished difference Result 1568 states and 2429 transitions. [2020-12-23 11:03:46,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 11:03:46,853 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 51 [2020-12-23 11:03:46,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 11:03:46,860 INFO L225 Difference]: With dead ends: 1568 [2020-12-23 11:03:46,860 INFO L226 Difference]: Without dead ends: 1054 [2020-12-23 11:03:46,863 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-23 11:03:46,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1054 states. [2020-12-23 11:03:46,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1054 to 1052. [2020-12-23 11:03:46,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1052 states. [2020-12-23 11:03:46,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1052 states to 1052 states and 1619 transitions. [2020-12-23 11:03:46,962 INFO L78 Accepts]: Start accepts. Automaton has 1052 states and 1619 transitions. Word has length 51 [2020-12-23 11:03:46,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 11:03:46,963 INFO L481 AbstractCegarLoop]: Abstraction has 1052 states and 1619 transitions. [2020-12-23 11:03:46,963 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 11:03:46,963 INFO L276 IsEmpty]: Start isEmpty. Operand 1052 states and 1619 transitions. [2020-12-23 11:03:46,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-23 11:03:46,965 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 11:03:46,965 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 11:03:46,965 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-23 11:03:46,965 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 11:03:46,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 11:03:46,966 INFO L82 PathProgramCache]: Analyzing trace with hash -1568014229, now seen corresponding path program 1 times [2020-12-23 11:03:46,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 11:03:46,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250839644] [2020-12-23 11:03:46,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 11:03:46,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 11:03:47,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 11:03:47,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250839644] [2020-12-23 11:03:47,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 11:03:47,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 11:03:47,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583871675] [2020-12-23 11:03:47,048 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 11:03:47,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 11:03:47,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 11:03:47,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-23 11:03:47,049 INFO L87 Difference]: Start difference. First operand 1052 states and 1619 transitions. Second operand 5 states. [2020-12-23 11:03:47,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 11:03:47,233 INFO L93 Difference]: Finished difference Result 2078 states and 3212 transitions. [2020-12-23 11:03:47,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 11:03:47,234 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 51 [2020-12-23 11:03:47,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 11:03:47,240 INFO L225 Difference]: With dead ends: 2078 [2020-12-23 11:03:47,240 INFO L226 Difference]: Without dead ends: 1052 [2020-12-23 11:03:47,243 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-23 11:03:47,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1052 states. [2020-12-23 11:03:47,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1052 to 1052. [2020-12-23 11:03:47,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1052 states. [2020-12-23 11:03:47,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1052 states to 1052 states and 1603 transitions. [2020-12-23 11:03:47,355 INFO L78 Accepts]: Start accepts. Automaton has 1052 states and 1603 transitions. Word has length 51 [2020-12-23 11:03:47,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 11:03:47,355 INFO L481 AbstractCegarLoop]: Abstraction has 1052 states and 1603 transitions. [2020-12-23 11:03:47,355 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 11:03:47,355 INFO L276 IsEmpty]: Start isEmpty. Operand 1052 states and 1603 transitions. [2020-12-23 11:03:47,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-23 11:03:47,356 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 11:03:47,357 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 11:03:47,357 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-23 11:03:47,357 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 11:03:47,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 11:03:47,358 INFO L82 PathProgramCache]: Analyzing trace with hash 884922534, now seen corresponding path program 1 times [2020-12-23 11:03:47,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 11:03:47,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636149318] [2020-12-23 11:03:47,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 11:03:47,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 11:03:47,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 11:03:47,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636149318] [2020-12-23 11:03:47,428 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 11:03:47,429 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 11:03:47,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015510367] [2020-12-23 11:03:47,429 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 11:03:47,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 11:03:47,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 11:03:47,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-23 11:03:47,431 INFO L87 Difference]: Start difference. First operand 1052 states and 1603 transitions. Second operand 5 states. [2020-12-23 11:03:47,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 11:03:47,610 INFO L93 Difference]: Finished difference Result 2078 states and 3180 transitions. [2020-12-23 11:03:47,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 11:03:47,611 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 51 [2020-12-23 11:03:47,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 11:03:47,617 INFO L225 Difference]: With dead ends: 2078 [2020-12-23 11:03:47,617 INFO L226 Difference]: Without dead ends: 1052 [2020-12-23 11:03:47,619 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-23 11:03:47,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1052 states. [2020-12-23 11:03:47,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1052 to 1052. [2020-12-23 11:03:47,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1052 states. [2020-12-23 11:03:47,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1052 states to 1052 states and 1587 transitions. [2020-12-23 11:03:47,708 INFO L78 Accepts]: Start accepts. Automaton has 1052 states and 1587 transitions. Word has length 51 [2020-12-23 11:03:47,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 11:03:47,709 INFO L481 AbstractCegarLoop]: Abstraction has 1052 states and 1587 transitions. [2020-12-23 11:03:47,709 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 11:03:47,709 INFO L276 IsEmpty]: Start isEmpty. Operand 1052 states and 1587 transitions. [2020-12-23 11:03:47,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-23 11:03:47,710 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 11:03:47,710 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 11:03:47,710 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-23 11:03:47,710 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 11:03:47,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 11:03:47,711 INFO L82 PathProgramCache]: Analyzing trace with hash -562107061, now seen corresponding path program 1 times [2020-12-23 11:03:47,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 11:03:47,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049952328] [2020-12-23 11:03:47,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 11:03:47,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 11:03:47,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 11:03:47,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049952328] [2020-12-23 11:03:47,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 11:03:47,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-23 11:03:47,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359165278] [2020-12-23 11:03:47,840 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 11:03:47,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 11:03:47,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 11:03:47,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-23 11:03:47,842 INFO L87 Difference]: Start difference. First operand 1052 states and 1587 transitions. Second operand 6 states. [2020-12-23 11:03:48,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 11:03:48,651 INFO L93 Difference]: Finished difference Result 9260 states and 14075 transitions. [2020-12-23 11:03:48,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 11:03:48,652 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 51 [2020-12-23 11:03:48,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 11:03:48,702 INFO L225 Difference]: With dead ends: 9260 [2020-12-23 11:03:48,703 INFO L226 Difference]: Without dead ends: 8234 [2020-12-23 11:03:48,708 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-12-23 11:03:48,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8234 states. [2020-12-23 11:03:49,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8234 to 2076. [2020-12-23 11:03:49,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2076 states. [2020-12-23 11:03:49,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2076 states to 2076 states and 3083 transitions. [2020-12-23 11:03:49,024 INFO L78 Accepts]: Start accepts. Automaton has 2076 states and 3083 transitions. Word has length 51 [2020-12-23 11:03:49,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 11:03:49,024 INFO L481 AbstractCegarLoop]: Abstraction has 2076 states and 3083 transitions. [2020-12-23 11:03:49,024 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 11:03:49,024 INFO L276 IsEmpty]: Start isEmpty. Operand 2076 states and 3083 transitions. [2020-12-23 11:03:49,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-23 11:03:49,025 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 11:03:49,025 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 11:03:49,026 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-23 11:03:49,026 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 11:03:49,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 11:03:49,026 INFO L82 PathProgramCache]: Analyzing trace with hash 59171559, now seen corresponding path program 1 times [2020-12-23 11:03:49,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 11:03:49,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94131552] [2020-12-23 11:03:49,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 11:03:49,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 11:03:49,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 11:03:49,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94131552] [2020-12-23 11:03:49,077 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 11:03:49,077 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 11:03:49,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450482220] [2020-12-23 11:03:49,078 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 11:03:49,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 11:03:49,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 11:03:49,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 11:03:49,079 INFO L87 Difference]: Start difference. First operand 2076 states and 3083 transitions. Second operand 3 states. [2020-12-23 11:03:49,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 11:03:49,369 INFO L93 Difference]: Finished difference Result 4618 states and 6855 transitions. [2020-12-23 11:03:49,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 11:03:49,375 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 53 [2020-12-23 11:03:49,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 11:03:49,389 INFO L225 Difference]: With dead ends: 4618 [2020-12-23 11:03:49,389 INFO L226 Difference]: Without dead ends: 2568 [2020-12-23 11:03:49,394 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 11:03:49,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2568 states. [2020-12-23 11:03:49,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2568 to 2566. [2020-12-23 11:03:49,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2566 states. [2020-12-23 11:03:49,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2566 states to 2566 states and 3773 transitions. [2020-12-23 11:03:49,684 INFO L78 Accepts]: Start accepts. Automaton has 2566 states and 3773 transitions. Word has length 53 [2020-12-23 11:03:49,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 11:03:49,685 INFO L481 AbstractCegarLoop]: Abstraction has 2566 states and 3773 transitions. [2020-12-23 11:03:49,685 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 11:03:49,685 INFO L276 IsEmpty]: Start isEmpty. Operand 2566 states and 3773 transitions. [2020-12-23 11:03:49,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-23 11:03:49,686 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 11:03:49,686 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 11:03:49,686 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-23 11:03:49,686 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 11:03:49,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 11:03:49,687 INFO L82 PathProgramCache]: Analyzing trace with hash 80174214, now seen corresponding path program 1 times [2020-12-23 11:03:49,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 11:03:49,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104275576] [2020-12-23 11:03:49,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 11:03:49,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 11:03:49,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 11:03:49,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104275576] [2020-12-23 11:03:49,901 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 11:03:49,901 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-23 11:03:49,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800936279] [2020-12-23 11:03:49,902 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 11:03:49,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 11:03:49,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 11:03:49,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 11:03:49,903 INFO L87 Difference]: Start difference. First operand 2566 states and 3773 transitions. Second operand 6 states. [2020-12-23 11:03:50,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 11:03:50,610 INFO L93 Difference]: Finished difference Result 7638 states and 11329 transitions. [2020-12-23 11:03:50,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 11:03:50,611 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 53 [2020-12-23 11:03:50,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 11:03:50,639 INFO L225 Difference]: With dead ends: 7638 [2020-12-23 11:03:50,640 INFO L226 Difference]: Without dead ends: 5100 [2020-12-23 11:03:50,646 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 11:03:50,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5100 states. [2020-12-23 11:03:50,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5100 to 2566. [2020-12-23 11:03:50,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2566 states. [2020-12-23 11:03:50,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2566 states to 2566 states and 3733 transitions. [2020-12-23 11:03:50,993 INFO L78 Accepts]: Start accepts. Automaton has 2566 states and 3733 transitions. Word has length 53 [2020-12-23 11:03:50,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 11:03:50,993 INFO L481 AbstractCegarLoop]: Abstraction has 2566 states and 3733 transitions. [2020-12-23 11:03:50,993 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 11:03:50,993 INFO L276 IsEmpty]: Start isEmpty. Operand 2566 states and 3733 transitions. [2020-12-23 11:03:50,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-23 11:03:50,995 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 11:03:50,996 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 11:03:50,996 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-23 11:03:50,996 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 11:03:50,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 11:03:50,997 INFO L82 PathProgramCache]: Analyzing trace with hash -1811476054, now seen corresponding path program 1 times [2020-12-23 11:03:50,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 11:03:50,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362881664] [2020-12-23 11:03:50,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 11:03:51,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 11:03:51,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 11:03:51,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362881664] [2020-12-23 11:03:51,111 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 11:03:51,111 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 11:03:51,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953468208] [2020-12-23 11:03:51,112 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 11:03:51,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 11:03:51,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 11:03:51,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-23 11:03:51,115 INFO L87 Difference]: Start difference. First operand 2566 states and 3733 transitions. Second operand 5 states. [2020-12-23 11:03:51,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 11:03:51,697 INFO L93 Difference]: Finished difference Result 4888 states and 7077 transitions. [2020-12-23 11:03:51,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 11:03:51,698 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 54 [2020-12-23 11:03:51,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 11:03:51,724 INFO L225 Difference]: With dead ends: 4888 [2020-12-23 11:03:51,724 INFO L226 Difference]: Without dead ends: 4886 [2020-12-23 11:03:51,727 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-23 11:03:51,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4886 states. [2020-12-23 11:03:52,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4886 to 2694. [2020-12-23 11:03:52,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2694 states. [2020-12-23 11:03:52,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2694 states to 2694 states and 3853 transitions. [2020-12-23 11:03:52,104 INFO L78 Accepts]: Start accepts. Automaton has 2694 states and 3853 transitions. Word has length 54 [2020-12-23 11:03:52,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 11:03:52,104 INFO L481 AbstractCegarLoop]: Abstraction has 2694 states and 3853 transitions. [2020-12-23 11:03:52,105 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 11:03:52,105 INFO L276 IsEmpty]: Start isEmpty. Operand 2694 states and 3853 transitions. [2020-12-23 11:03:52,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-23 11:03:52,113 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 11:03:52,114 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 11:03:52,114 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-23 11:03:52,114 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 11:03:52,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 11:03:52,115 INFO L82 PathProgramCache]: Analyzing trace with hash 1690284398, now seen corresponding path program 1 times [2020-12-23 11:03:52,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 11:03:52,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352368104] [2020-12-23 11:03:52,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 11:03:52,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 11:03:52,254 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 11:03:52,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352368104] [2020-12-23 11:03:52,255 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 11:03:52,255 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-23 11:03:52,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378295276] [2020-12-23 11:03:52,255 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 11:03:52,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 11:03:52,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 11:03:52,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-23 11:03:52,257 INFO L87 Difference]: Start difference. First operand 2694 states and 3853 transitions. Second operand 6 states. [2020-12-23 11:03:53,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 11:03:53,497 INFO L93 Difference]: Finished difference Result 13720 states and 19666 transitions. [2020-12-23 11:03:53,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 11:03:53,498 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 76 [2020-12-23 11:03:53,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 11:03:53,529 INFO L225 Difference]: With dead ends: 13720 [2020-12-23 11:03:53,529 INFO L226 Difference]: Without dead ends: 11542 [2020-12-23 11:03:53,537 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-12-23 11:03:53,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11542 states. [2020-12-23 11:03:54,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11542 to 5118. [2020-12-23 11:03:54,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5118 states. [2020-12-23 11:03:54,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5118 states to 5118 states and 7301 transitions. [2020-12-23 11:03:54,231 INFO L78 Accepts]: Start accepts. Automaton has 5118 states and 7301 transitions. Word has length 76 [2020-12-23 11:03:54,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 11:03:54,231 INFO L481 AbstractCegarLoop]: Abstraction has 5118 states and 7301 transitions. [2020-12-23 11:03:54,231 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 11:03:54,231 INFO L276 IsEmpty]: Start isEmpty. Operand 5118 states and 7301 transitions. [2020-12-23 11:03:54,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-23 11:03:54,234 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 11:03:54,234 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 11:03:54,235 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-23 11:03:54,235 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 11:03:54,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 11:03:54,236 INFO L82 PathProgramCache]: Analyzing trace with hash -34257664, now seen corresponding path program 1 times [2020-12-23 11:03:54,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 11:03:54,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425371688] [2020-12-23 11:03:54,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 11:03:54,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 11:03:54,347 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-23 11:03:54,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425371688] [2020-12-23 11:03:54,348 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 11:03:54,348 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-23 11:03:54,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147187535] [2020-12-23 11:03:54,349 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 11:03:54,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 11:03:54,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 11:03:54,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 11:03:54,350 INFO L87 Difference]: Start difference. First operand 5118 states and 7301 transitions. Second operand 6 states. [2020-12-23 11:03:55,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 11:03:55,735 INFO L93 Difference]: Finished difference Result 16384 states and 23458 transitions. [2020-12-23 11:03:55,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 11:03:55,737 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 76 [2020-12-23 11:03:55,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 11:03:55,773 INFO L225 Difference]: With dead ends: 16384 [2020-12-23 11:03:55,773 INFO L226 Difference]: Without dead ends: 13718 [2020-12-23 11:03:55,786 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 11:03:55,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13718 states. [2020-12-23 11:03:56,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13718 to 8870. [2020-12-23 11:03:56,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8870 states. [2020-12-23 11:03:57,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8870 states to 8870 states and 12613 transitions. [2020-12-23 11:03:57,012 INFO L78 Accepts]: Start accepts. Automaton has 8870 states and 12613 transitions. Word has length 76 [2020-12-23 11:03:57,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 11:03:57,016 INFO L481 AbstractCegarLoop]: Abstraction has 8870 states and 12613 transitions. [2020-12-23 11:03:57,016 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 11:03:57,016 INFO L276 IsEmpty]: Start isEmpty. Operand 8870 states and 12613 transitions. [2020-12-23 11:03:57,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-23 11:03:57,020 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 11:03:57,021 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 11:03:57,021 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-23 11:03:57,021 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 11:03:57,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 11:03:57,022 INFO L82 PathProgramCache]: Analyzing trace with hash 1119688442, now seen corresponding path program 1 times [2020-12-23 11:03:57,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 11:03:57,022 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113695373] [2020-12-23 11:03:57,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 11:03:57,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 11:03:57,149 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 11:03:57,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113695373] [2020-12-23 11:03:57,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 11:03:57,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-23 11:03:57,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40524171] [2020-12-23 11:03:57,150 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 11:03:57,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 11:03:57,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 11:03:57,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-23 11:03:57,153 INFO L87 Difference]: Start difference. First operand 8870 states and 12613 transitions. Second operand 6 states. [2020-12-23 11:03:59,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 11:03:59,050 INFO L93 Difference]: Finished difference Result 19048 states and 27242 transitions. [2020-12-23 11:03:59,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 11:03:59,051 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 76 [2020-12-23 11:03:59,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 11:03:59,102 INFO L225 Difference]: With dead ends: 19048 [2020-12-23 11:03:59,102 INFO L226 Difference]: Without dead ends: 16382 [2020-12-23 11:03:59,112 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-12-23 11:03:59,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16382 states. [2020-12-23 11:04:00,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16382 to 11534. [2020-12-23 11:04:00,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11534 states. [2020-12-23 11:04:00,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11534 states to 11534 states and 16397 transitions. [2020-12-23 11:04:00,308 INFO L78 Accepts]: Start accepts. Automaton has 11534 states and 16397 transitions. Word has length 76 [2020-12-23 11:04:00,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 11:04:00,308 INFO L481 AbstractCegarLoop]: Abstraction has 11534 states and 16397 transitions. [2020-12-23 11:04:00,309 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 11:04:00,309 INFO L276 IsEmpty]: Start isEmpty. Operand 11534 states and 16397 transitions. [2020-12-23 11:04:00,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-23 11:04:00,312 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 11:04:00,312 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 11:04:00,312 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-23 11:04:00,312 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 11:04:00,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 11:04:00,313 INFO L82 PathProgramCache]: Analyzing trace with hash 261787764, now seen corresponding path program 1 times [2020-12-23 11:04:00,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 11:04:00,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029388332] [2020-12-23 11:04:00,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 11:04:00,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 11:04:00,413 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 11:04:00,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029388332] [2020-12-23 11:04:00,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 11:04:00,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-23 11:04:00,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768039707] [2020-12-23 11:04:00,414 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 11:04:00,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 11:04:00,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 11:04:00,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-23 11:04:00,416 INFO L87 Difference]: Start difference. First operand 11534 states and 16397 transitions. Second operand 6 states. [2020-12-23 11:04:02,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 11:04:02,241 INFO L93 Difference]: Finished difference Result 21712 states and 31026 transitions. [2020-12-23 11:04:02,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 11:04:02,241 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 76 [2020-12-23 11:04:02,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 11:04:02,282 INFO L225 Difference]: With dead ends: 21712 [2020-12-23 11:04:02,282 INFO L226 Difference]: Without dead ends: 19046 [2020-12-23 11:04:02,296 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-12-23 11:04:02,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19046 states. [2020-12-23 11:04:04,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19046 to 14198. [2020-12-23 11:04:04,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14198 states. [2020-12-23 11:04:04,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14198 states to 14198 states and 20181 transitions. [2020-12-23 11:04:04,187 INFO L78 Accepts]: Start accepts. Automaton has 14198 states and 20181 transitions. Word has length 76 [2020-12-23 11:04:04,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 11:04:04,188 INFO L481 AbstractCegarLoop]: Abstraction has 14198 states and 20181 transitions. [2020-12-23 11:04:04,188 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 11:04:04,188 INFO L276 IsEmpty]: Start isEmpty. Operand 14198 states and 20181 transitions. [2020-12-23 11:04:04,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-23 11:04:04,192 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 11:04:04,193 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 11:04:04,193 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-23 11:04:04,193 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 11:04:04,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 11:04:04,194 INFO L82 PathProgramCache]: Analyzing trace with hash -1414120063, now seen corresponding path program 1 times [2020-12-23 11:04:04,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 11:04:04,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116051398] [2020-12-23 11:04:04,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 11:04:04,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 11:04:04,326 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 11:04:04,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116051398] [2020-12-23 11:04:04,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464011453] [2020-12-23 11:04:04,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 11:04:04,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 11:04:04,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 11:04:04,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 11:04:04,776 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 11:04:04,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 11:04:04,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2020-12-23 11:04:04,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734003553] [2020-12-23 11:04:04,778 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 11:04:04,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 11:04:04,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 11:04:04,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-23 11:04:04,779 INFO L87 Difference]: Start difference. First operand 14198 states and 20181 transitions. Second operand 7 states. [2020-12-23 11:04:07,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 11:04:07,707 INFO L93 Difference]: Finished difference Result 35693 states and 50844 transitions. [2020-12-23 11:04:07,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 11:04:07,708 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 77 [2020-12-23 11:04:07,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 11:04:07,783 INFO L225 Difference]: With dead ends: 35693 [2020-12-23 11:04:07,783 INFO L226 Difference]: Without dead ends: 23723 [2020-12-23 11:04:07,803 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-23 11:04:07,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23723 states. [2020-12-23 11:04:10,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23723 to 23526. [2020-12-23 11:04:10,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23526 states. [2020-12-23 11:04:10,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23526 states to 23526 states and 32933 transitions. [2020-12-23 11:04:10,255 INFO L78 Accepts]: Start accepts. Automaton has 23526 states and 32933 transitions. Word has length 77 [2020-12-23 11:04:10,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 11:04:10,255 INFO L481 AbstractCegarLoop]: Abstraction has 23526 states and 32933 transitions. [2020-12-23 11:04:10,255 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 11:04:10,255 INFO L276 IsEmpty]: Start isEmpty. Operand 23526 states and 32933 transitions. [2020-12-23 11:04:10,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-23 11:04:10,259 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 11:04:10,259 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 11:04:10,473 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-23 11:04:10,474 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 11:04:10,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 11:04:10,475 INFO L82 PathProgramCache]: Analyzing trace with hash -2122663330, now seen corresponding path program 1 times [2020-12-23 11:04:10,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 11:04:10,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048799336] [2020-12-23 11:04:10,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 11:04:10,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 11:04:10,687 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 11:04:10,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048799336] [2020-12-23 11:04:10,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824114181] [2020-12-23 11:04:10,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 11:04:10,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 11:04:10,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-23 11:04:10,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 11:04:11,077 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 11:04:11,380 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 11:04:11,381 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 11:04:11,381 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-23 11:04:11,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170738357] [2020-12-23 11:04:11,382 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 11:04:11,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 11:04:11,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 11:04:11,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2020-12-23 11:04:11,383 INFO L87 Difference]: Start difference. First operand 23526 states and 32933 transitions. Second operand 17 states. [2020-12-23 11:04:13,243 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2020-12-23 11:04:13,873 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 43 [2020-12-23 11:04:14,277 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2020-12-23 11:04:15,798 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2020-12-23 11:04:16,295 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2020-12-23 11:04:16,712 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-12-23 11:04:17,141 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 43 [2020-12-23 11:04:17,573 WARN L197 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2020-12-23 11:04:18,065 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2020-12-23 11:04:18,732 WARN L197 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2020-12-23 11:04:18,906 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2020-12-23 11:04:19,430 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 43 [2020-12-23 11:04:20,405 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2020-12-23 11:04:23,469 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2020-12-23 11:04:23,631 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2020-12-23 11:04:23,786 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2020-12-23 11:04:24,257 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 43 [2020-12-23 11:04:26,213 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2020-12-23 11:04:26,780 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 45 [2020-12-23 11:04:27,635 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2020-12-23 11:04:28,340 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2020-12-23 11:04:28,493 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2020-12-23 11:04:29,333 WARN L197 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 59 [2020-12-23 11:04:30,651 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2020-12-23 11:04:30,887 WARN L197 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 56 [2020-12-23 11:04:31,095 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2020-12-23 11:04:32,486 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2020-12-23 11:04:33,233 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 44 [2020-12-23 11:04:34,216 WARN L197 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2020-12-23 11:04:36,286 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2020-12-23 11:04:36,974 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2020-12-23 11:04:39,091 WARN L197 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2020-12-23 11:04:40,527 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2020-12-23 11:05:18,962 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2020-12-23 11:05:19,177 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2020-12-23 11:05:20,570 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 41 [2020-12-23 11:05:21,000 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 41 [2020-12-23 11:05:21,525 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2020-12-23 11:05:23,498 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 44 [2020-12-23 11:05:23,955 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2020-12-23 11:05:24,479 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 44 [2020-12-23 11:05:24,671 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2020-12-23 11:05:26,826 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 52 [2020-12-23 11:05:36,991 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 41 [2020-12-23 11:05:38,187 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 44 [2020-12-23 11:05:45,713 WARN L197 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2020-12-23 11:05:46,013 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 41 [2020-12-23 11:05:47,180 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 52 [2020-12-23 11:05:47,341 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 44 [2020-12-23 11:05:48,477 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2020-12-23 11:05:48,688 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 44 [2020-12-23 11:05:50,134 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 52 [2020-12-23 11:05:51,251 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 44 [2020-12-23 11:05:52,827 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 52 [2020-12-23 11:05:53,282 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 47 [2020-12-23 11:05:53,747 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 44 [2020-12-23 11:05:55,233 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 55 [2020-12-23 11:05:55,664 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 47 [2020-12-23 11:05:55,853 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 41 [2020-12-23 11:05:57,181 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2020-12-23 11:06:04,753 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2020-12-23 11:06:04,994 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2020-12-23 11:06:09,594 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 43 [2020-12-23 11:06:09,936 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2020-12-23 11:06:11,806 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2020-12-23 11:06:12,321 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 44 [2020-12-23 11:06:13,260 WARN L197 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2020-12-23 11:06:13,572 WARN L197 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2020-12-23 11:06:24,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 11:06:24,841 INFO L93 Difference]: Finished difference Result 649292 states and 889037 transitions. [2020-12-23 11:06:24,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 461 states. [2020-12-23 11:06:24,842 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 78 [2020-12-23 11:06:24,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 11:06:26,316 INFO L225 Difference]: With dead ends: 649292 [2020-12-23 11:06:26,316 INFO L226 Difference]: Without dead ends: 625794 [2020-12-23 11:06:26,590 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 541 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 470 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106232 ImplicationChecksByTransitivity, 39.9s TimeCoverageRelationStatistics Valid=21036, Invalid=201276, Unknown=0, NotChecked=0, Total=222312 [2020-12-23 11:06:27,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625794 states. [2020-12-23 11:06:46,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625794 to 98662. [2020-12-23 11:06:46,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98662 states. [2020-12-23 11:06:47,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98662 states to 98662 states and 136823 transitions. [2020-12-23 11:06:47,317 INFO L78 Accepts]: Start accepts. Automaton has 98662 states and 136823 transitions. Word has length 78 [2020-12-23 11:06:47,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 11:06:47,317 INFO L481 AbstractCegarLoop]: Abstraction has 98662 states and 136823 transitions. [2020-12-23 11:06:47,318 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 11:06:47,318 INFO L276 IsEmpty]: Start isEmpty. Operand 98662 states and 136823 transitions. [2020-12-23 11:06:47,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-23 11:06:47,324 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 11:06:47,324 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 11:06:47,537 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-23 11:06:47,538 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 11:06:47,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 11:06:47,540 INFO L82 PathProgramCache]: Analyzing trace with hash 635552222, now seen corresponding path program 1 times [2020-12-23 11:06:47,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 11:06:47,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786259078] [2020-12-23 11:06:47,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 11:06:47,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 11:06:47,827 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 11:06:47,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786259078] [2020-12-23 11:06:47,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653310716] [2020-12-23 11:06:47,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 11:06:47,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 11:06:47,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-23 11:06:47,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 11:06:48,226 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 11:06:48,441 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 36 [2020-12-23 11:06:48,962 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 11:06:48,962 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 11:06:48,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 20 [2020-12-23 11:06:48,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639756781] [2020-12-23 11:06:48,963 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 11:06:48,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 11:06:48,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 11:06:48,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2020-12-23 11:06:48,964 INFO L87 Difference]: Start difference. First operand 98662 states and 136823 transitions. Second operand 20 states. [2020-12-23 11:06:49,778 WARN L197 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2020-12-23 11:06:50,064 WARN L197 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2020-12-23 11:06:50,422 WARN L197 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2020-12-23 11:06:51,056 WARN L197 SmtUtils]: Spent 509.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 110 [2020-12-23 11:06:51,359 WARN L197 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2020-12-23 11:06:51,930 WARN L197 SmtUtils]: Spent 536.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 113 [2020-12-23 11:06:52,538 WARN L197 SmtUtils]: Spent 549.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 113 [2020-12-23 11:06:53,184 WARN L197 SmtUtils]: Spent 542.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 113 [2020-12-23 11:06:53,536 WARN L197 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2020-12-23 11:06:54,205 WARN L197 SmtUtils]: Spent 515.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 107 [2020-12-23 11:06:54,809 WARN L197 SmtUtils]: Spent 564.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 107 [2020-12-23 11:06:55,079 WARN L197 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2020-12-23 11:06:55,404 WARN L197 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2020-12-23 11:06:55,968 WARN L197 SmtUtils]: Spent 469.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 101 [2020-12-23 11:06:56,579 WARN L197 SmtUtils]: Spent 524.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 101 [2020-12-23 11:06:56,879 WARN L197 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2020-12-23 11:06:57,289 WARN L197 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2020-12-23 11:06:58,245 WARN L197 SmtUtils]: Spent 698.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 121 [2020-12-23 11:06:58,984 WARN L197 SmtUtils]: Spent 659.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 109 [2020-12-23 11:06:59,702 WARN L197 SmtUtils]: Spent 642.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 121 [2020-12-23 11:07:00,360 WARN L197 SmtUtils]: Spent 590.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 109 [2020-12-23 11:07:00,730 WARN L197 SmtUtils]: Spent 291.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2020-12-23 11:07:01,113 WARN L197 SmtUtils]: Spent 305.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2020-12-23 11:07:01,627 WARN L197 SmtUtils]: Spent 329.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-12-23 11:07:01,959 WARN L197 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2020-12-23 11:07:03,003 WARN L197 SmtUtils]: Spent 286.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2020-12-23 11:07:03,377 WARN L197 SmtUtils]: Spent 321.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-12-23 11:07:03,694 WARN L197 SmtUtils]: Spent 267.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2020-12-23 11:07:04,050 WARN L197 SmtUtils]: Spent 279.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2020-12-23 11:07:04,776 WARN L197 SmtUtils]: Spent 312.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2020-12-23 11:07:05,427 WARN L197 SmtUtils]: Spent 614.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 109 [2020-12-23 11:07:05,846 WARN L197 SmtUtils]: Spent 350.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-12-23 11:07:06,643 WARN L197 SmtUtils]: Spent 693.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 117 [2020-12-23 11:07:06,966 WARN L197 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2020-12-23 11:07:07,609 WARN L197 SmtUtils]: Spent 599.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 97 [2020-12-23 11:07:08,090 WARN L197 SmtUtils]: Spent 419.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2020-12-23 11:07:08,945 WARN L197 SmtUtils]: Spent 760.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 105 [2020-12-23 11:07:09,399 WARN L197 SmtUtils]: Spent 374.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2020-12-23 11:07:10,162 WARN L197 SmtUtils]: Spent 729.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 109 [2020-12-23 11:07:10,650 WARN L197 SmtUtils]: Spent 399.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-12-23 11:07:11,495 WARN L197 SmtUtils]: Spent 786.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 117 [2020-12-23 11:07:11,907 WARN L197 SmtUtils]: Spent 343.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2020-12-23 11:07:12,621 WARN L197 SmtUtils]: Spent 658.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 97 [2020-12-23 11:07:13,069 WARN L197 SmtUtils]: Spent 378.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2020-12-23 11:07:14,000 WARN L197 SmtUtils]: Spent 845.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 105 [2020-12-23 11:07:14,432 WARN L197 SmtUtils]: Spent 366.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2020-12-23 11:07:15,392 WARN L197 SmtUtils]: Spent 900.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 118 [2020-12-23 11:07:15,855 WARN L197 SmtUtils]: Spent 407.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-12-23 11:07:16,381 WARN L197 SmtUtils]: Spent 445.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2020-12-23 11:07:17,169 WARN L197 SmtUtils]: Spent 727.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 98 [2020-12-23 11:07:17,630 WARN L197 SmtUtils]: Spent 409.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2020-12-23 11:07:18,041 WARN L197 SmtUtils]: Spent 343.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-12-23 11:07:18,977 WARN L197 SmtUtils]: Spent 832.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 106 [2020-12-23 11:07:19,508 WARN L197 SmtUtils]: Spent 435.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2020-12-23 11:07:20,053 WARN L197 SmtUtils]: Spent 375.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2020-12-23 11:07:21,194 WARN L197 SmtUtils]: Spent 983.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 116 [2020-12-23 11:07:22,421 WARN L197 SmtUtils]: Spent 1.14 s on a formula simplification. DAG size of input: 132 DAG size of output: 124 [2020-12-23 11:07:23,550 WARN L197 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 112 DAG size of output: 104 [2020-12-23 11:07:24,696 WARN L197 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 120 DAG size of output: 112 [2020-12-23 11:07:25,889 WARN L197 SmtUtils]: Spent 1.10 s on a formula simplification. DAG size of input: 124 DAG size of output: 116 [2020-12-23 11:07:27,232 WARN L197 SmtUtils]: Spent 1.22 s on a formula simplification. DAG size of input: 132 DAG size of output: 124 [2020-12-23 11:07:28,192 WARN L197 SmtUtils]: Spent 820.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 104 [2020-12-23 11:07:29,425 WARN L197 SmtUtils]: Spent 1.09 s on a formula simplification. DAG size of input: 120 DAG size of output: 112 [2020-12-23 11:07:29,999 WARN L197 SmtUtils]: Spent 487.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2020-12-23 11:07:30,610 WARN L197 SmtUtils]: Spent 524.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2020-12-23 11:07:31,150 WARN L197 SmtUtils]: Spent 405.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-12-23 11:07:31,787 WARN L197 SmtUtils]: Spent 472.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2020-12-23 11:07:33,157 WARN L197 SmtUtils]: Spent 1.29 s on a formula simplification. DAG size of input: 129 DAG size of output: 121 [2020-12-23 11:07:34,186 WARN L197 SmtUtils]: Spent 944.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 101 [2020-12-23 11:07:35,388 WARN L197 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 117 DAG size of output: 109 [2020-12-23 11:07:36,945 WARN L197 SmtUtils]: Spent 1.23 s on a formula simplification. DAG size of input: 124 DAG size of output: 116 [2020-12-23 11:07:38,383 WARN L197 SmtUtils]: Spent 1.33 s on a formula simplification. DAG size of input: 132 DAG size of output: 124 [2020-12-23 11:07:39,502 WARN L197 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 112 DAG size of output: 104 [2020-12-23 11:07:40,746 WARN L197 SmtUtils]: Spent 1.13 s on a formula simplification. DAG size of input: 120 DAG size of output: 112 [2020-12-23 11:07:41,964 WARN L197 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 114 DAG size of output: 106 [2020-12-23 11:07:43,535 WARN L197 SmtUtils]: Spent 1.43 s on a formula simplification. DAG size of input: 122 DAG size of output: 114 [2020-12-23 11:07:44,713 WARN L197 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 102 DAG size of output: 94 [2020-12-23 11:07:46,104 WARN L197 SmtUtils]: Spent 1.16 s on a formula simplification. DAG size of input: 110 DAG size of output: 102