/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.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 21:00:03,499 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 21:00:03,502 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 21:00:03,560 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 21:00:03,561 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 21:00:03,565 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 21:00:03,570 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 21:00:03,576 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 21:00:03,579 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 21:00:03,586 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 21:00:03,590 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 21:00:03,592 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 21:00:03,592 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 21:00:03,595 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 21:00:03,597 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 21:00:03,599 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 21:00:03,600 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 21:00:03,604 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 21:00:03,612 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 21:00:03,621 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 21:00:03,623 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 21:00:03,627 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 21:00:03,628 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 21:00:03,630 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 21:00:03,633 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-01-06 21:00:03,633 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-01-06 21:00:03,634 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-01-06 21:00:03,635 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-01-06 21:00:03,636 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-01-06 21:00:03,637 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-01-06 21:00:03,637 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 21:00:03,638 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 21:00:03,639 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 21:00:03,640 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 21:00:03,641 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 21:00:03,642 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 21:00:03,643 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 21:00:03,643 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 21:00:03,643 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 21:00:03,644 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 21:00:03,645 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 21:00:03,646 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 21:00:03,675 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 21:00:03,675 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 21:00:03,677 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 21:00:03,677 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 21:00:03,678 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 21:00:03,678 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 21:00:03,678 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 21:00:03,678 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 21:00:03,678 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 21:00:03,679 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 21:00:03,679 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 21:00:03,679 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 21:00:03,679 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 21:00:03,680 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 21:00:03,680 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 21:00:03,680 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 21:00:03,680 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 21:00:03,680 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 21:00:03,681 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 21:00:03,681 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 21:00:03,681 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 21:00:03,681 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 21:00:03,682 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 21:00:03,682 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 21:00:03,682 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 21:00:03,682 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 21:00:04,159 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 21:00:04,191 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 21:00:04,195 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 21:00:04,196 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 21:00:04,197 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 21:00:04,198 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-01-06 21:00:04,276 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/f512a994f/69592c19babc4d878bb33d8a9b6adc5f/FLAGc3878ba47 [2021-01-06 21:00:05,087 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 21:00:05,088 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-01-06 21:00:05,106 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/f512a994f/69592c19babc4d878bb33d8a9b6adc5f/FLAGc3878ba47 [2021-01-06 21:00:05,347 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/f512a994f/69592c19babc4d878bb33d8a9b6adc5f [2021-01-06 21:00:05,351 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 21:00:05,354 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 21:00:05,358 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 21:00:05,359 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 21:00:05,363 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 21:00:05,364 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 09:00:05" (1/1) ... [2021-01-06 21:00:05,365 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6df54791 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:00:05, skipping insertion in model container [2021-01-06 21:00:05,365 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 09:00:05" (1/1) ... [2021-01-06 21:00:05,374 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 21:00:05,420 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_2895~0,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[~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[~node2__m2~0,] 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[~node3__m3~0,] 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[~node4__m4~0,] 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[~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_2986~0,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,] left hand side expression in assignment: lhs: VariableLHS[~node1__m1~1,] left hand side expression in assignment: lhs: VariableLHS[~r1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~node1__m1~1,] 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__m2~1,] left hand side expression in assignment: lhs: VariableLHS[~node2__m2~1,] 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__m3~1,] left hand side expression in assignment: lhs: VariableLHS[~node3__m3~1,] 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__m4~1,] left hand side expression in assignment: lhs: VariableLHS[~node4__m4~1,] 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~1,] left hand side expression in assignment: lhs: VariableLHS[~__return_3148~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~main__c1~0,] left hand side expression in assignment: lhs: VariableLHS[~__tmp_2~0,] left hand side expression in assignment: lhs: VariableLHS[~assert__arg~1,] [2021-01-06 21:00:05,795 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.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[6232,6245] left hand side expression in assignment: lhs: VariableLHS[~node1__m1~2,] left hand side expression in assignment: lhs: VariableLHS[~r1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~r1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~node1__m1~2,] 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__m2~2,] left hand side expression in assignment: lhs: VariableLHS[~node2__m2~2,] 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__m3~2,] left hand side expression in assignment: lhs: VariableLHS[~node3__m3~2,] 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__m4~2,] left hand side expression in assignment: lhs: VariableLHS[~node4__m4~2,] 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[~st4~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~node4____CPAchecker_TMP_0~1,] 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_0~1,] left hand side expression in assignment: lhs: VariableLHS[~st3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~node3____CPAchecker_TMP_0~1,] 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_0~1,] left hand side expression in assignment: lhs: VariableLHS[~st2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~node2____CPAchecker_TMP_0~1,] 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_0~1,] left hand side expression in assignment: lhs: VariableLHS[~st1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~node1____CPAchecker_TMP_0~1,] 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_0~1,] left hand side expression in assignment: lhs: VariableLHS[~check__tmp~1,] left hand side expression in assignment: lhs: VariableLHS[~check__tmp~1,] left hand side expression in assignment: lhs: VariableLHS[~check__tmp~1,] left hand side expression in assignment: lhs: VariableLHS[~check__tmp~1,] left hand side expression in assignment: lhs: VariableLHS[~st4~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~st3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~st2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~st1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~node4____CPAchecker_TMP_0~0,] left hand side expression in assignment: lhs: VariableLHS[~node3____CPAchecker_TMP_0~0,] left hand side expression in assignment: lhs: VariableLHS[~node2____CPAchecker_TMP_0~0,] left hand side expression in assignment: lhs: VariableLHS[~node1____CPAchecker_TMP_0~0,] [2021-01-06 21:00:05,911 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 21:00:05,928 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_2895~0,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[~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[~node2__m2~0,] 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[~node3__m3~0,] 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[~node4__m4~0,] 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[~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_2986~0,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,] left hand side expression in assignment: lhs: VariableLHS[~node1__m1~1,] left hand side expression in assignment: lhs: VariableLHS[~r1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~node1__m1~1,] 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__m2~1,] left hand side expression in assignment: lhs: VariableLHS[~node2__m2~1,] 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__m3~1,] left hand side expression in assignment: lhs: VariableLHS[~node3__m3~1,] 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__m4~1,] left hand side expression in assignment: lhs: VariableLHS[~node4__m4~1,] 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~1,] left hand side expression in assignment: lhs: VariableLHS[~__return_3148~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~main__c1~0,] left hand side expression in assignment: lhs: VariableLHS[~__tmp_2~0,] left hand side expression in assignment: lhs: VariableLHS[~assert__arg~1,] [2021-01-06 21:00:05,981 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.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[6232,6245] left hand side expression in assignment: lhs: VariableLHS[~node1__m1~2,] left hand side expression in assignment: lhs: VariableLHS[~r1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~r1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~node1__m1~2,] 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__m2~2,] left hand side expression in assignment: lhs: VariableLHS[~node2__m2~2,] 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__m3~2,] left hand side expression in assignment: lhs: VariableLHS[~node3__m3~2,] 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__m4~2,] left hand side expression in assignment: lhs: VariableLHS[~node4__m4~2,] 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[~st4~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~node4____CPAchecker_TMP_0~1,] 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_0~1,] left hand side expression in assignment: lhs: VariableLHS[~st3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~node3____CPAchecker_TMP_0~1,] 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_0~1,] left hand side expression in assignment: lhs: VariableLHS[~st2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~node2____CPAchecker_TMP_0~1,] 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_0~1,] left hand side expression in assignment: lhs: VariableLHS[~st1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~node1____CPAchecker_TMP_0~1,] 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_0~1,] left hand side expression in assignment: lhs: VariableLHS[~check__tmp~1,] left hand side expression in assignment: lhs: VariableLHS[~check__tmp~1,] left hand side expression in assignment: lhs: VariableLHS[~check__tmp~1,] left hand side expression in assignment: lhs: VariableLHS[~check__tmp~1,] left hand side expression in assignment: lhs: VariableLHS[~st4~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~st3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~st2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~st1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~node4____CPAchecker_TMP_0~0,] left hand side expression in assignment: lhs: VariableLHS[~node3____CPAchecker_TMP_0~0,] left hand side expression in assignment: lhs: VariableLHS[~node2____CPAchecker_TMP_0~0,] left hand side expression in assignment: lhs: VariableLHS[~node1____CPAchecker_TMP_0~0,] [2021-01-06 21:00:06,034 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 21:00:06,065 INFO L208 MainTranslator]: Completed translation [2021-01-06 21:00:06,066 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:00:06 WrapperNode [2021-01-06 21:00:06,066 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 21:00:06,068 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 21:00:06,068 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 21:00:06,068 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 21:00:06,078 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:00:06" (1/1) ... [2021-01-06 21:00:06,093 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:00:06" (1/1) ... [2021-01-06 21:00:06,136 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 21:00:06,137 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 21:00:06,137 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 21:00:06,137 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 21:00:06,149 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:00:06" (1/1) ... [2021-01-06 21:00:06,149 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:00:06" (1/1) ... [2021-01-06 21:00:06,153 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:00:06" (1/1) ... [2021-01-06 21:00:06,154 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:00:06" (1/1) ... [2021-01-06 21:00:06,163 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:00:06" (1/1) ... [2021-01-06 21:00:06,176 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:00:06" (1/1) ... [2021-01-06 21:00:06,186 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:00:06" (1/1) ... [2021-01-06 21:00:06,192 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 21:00:06,196 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 21:00:06,196 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 21:00:06,196 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 21:00:06,197 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:00:06" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 21:00:06,324 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 21:00:06,324 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 21:00:06,324 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 21:00:06,325 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 21:00:07,151 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 21:00:07,151 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-01-06 21:00:07,153 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 09:00:07 BoogieIcfgContainer [2021-01-06 21:00:07,154 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 21:00:07,155 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 21:00:07,156 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 21:00:07,160 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 21:00:07,160 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 09:00:05" (1/3) ... [2021-01-06 21:00:07,161 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a027e69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 09:00:07, skipping insertion in model container [2021-01-06 21:00:07,161 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:00:06" (2/3) ... [2021-01-06 21:00:07,162 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a027e69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 09:00:07, skipping insertion in model container [2021-01-06 21:00:07,162 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 09:00:07" (3/3) ... [2021-01-06 21:00:07,164 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-01-06 21:00:07,171 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 21:00:07,177 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 21:00:07,198 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 21:00:07,227 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 21:00:07,228 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 21:00:07,228 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 21:00:07,228 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 21:00:07,228 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 21:00:07,228 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 21:00:07,229 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 21:00:07,229 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 21:00:07,249 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states. [2021-01-06 21:00:07,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-01-06 21:00:07,259 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 21:00:07,260 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, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 21:00:07,261 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 21:00:07,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 21:00:07,268 INFO L82 PathProgramCache]: Analyzing trace with hash -1503533793, now seen corresponding path program 1 times [2021-01-06 21:00:07,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 21:00:07,280 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561305631] [2021-01-06 21:00:07,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 21:00:07,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 21:00:07,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 21:00:07,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561305631] [2021-01-06 21:00:07,814 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 21:00:07,814 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 21:00:07,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817539158] [2021-01-06 21:00:07,823 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 21:00:07,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 21:00:07,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 21:00:07,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 21:00:07,849 INFO L87 Difference]: Start difference. First operand 123 states. Second operand 3 states. [2021-01-06 21:00:08,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 21:00:08,072 INFO L93 Difference]: Finished difference Result 245 states and 401 transitions. [2021-01-06 21:00:08,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 21:00:08,075 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 61 [2021-01-06 21:00:08,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 21:00:08,091 INFO L225 Difference]: With dead ends: 245 [2021-01-06 21:00:08,091 INFO L226 Difference]: Without dead ends: 184 [2021-01-06 21:00:08,095 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 21:00:08,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-01-06 21:00:08,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 182. [2021-01-06 21:00:08,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2021-01-06 21:00:08,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 263 transitions. [2021-01-06 21:00:08,213 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 263 transitions. Word has length 61 [2021-01-06 21:00:08,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 21:00:08,215 INFO L481 AbstractCegarLoop]: Abstraction has 182 states and 263 transitions. [2021-01-06 21:00:08,215 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 21:00:08,216 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 263 transitions. [2021-01-06 21:00:08,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-06 21:00:08,221 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 21:00:08,224 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 21:00:08,224 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 21:00:08,225 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 21:00:08,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 21:00:08,226 INFO L82 PathProgramCache]: Analyzing trace with hash -886934908, now seen corresponding path program 1 times [2021-01-06 21:00:08,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 21:00:08,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603542238] [2021-01-06 21:00:08,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 21:00:08,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 21:00:08,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 21:00:08,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603542238] [2021-01-06 21:00:08,411 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 21:00:08,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 21:00:08,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526341526] [2021-01-06 21:00:08,413 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 21:00:08,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 21:00:08,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 21:00:08,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-01-06 21:00:08,415 INFO L87 Difference]: Start difference. First operand 182 states and 263 transitions. Second operand 5 states. [2021-01-06 21:00:08,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 21:00:08,643 INFO L93 Difference]: Finished difference Result 335 states and 496 transitions. [2021-01-06 21:00:08,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 21:00:08,644 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 63 [2021-01-06 21:00:08,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 21:00:08,646 INFO L225 Difference]: With dead ends: 335 [2021-01-06 21:00:08,646 INFO L226 Difference]: Without dead ends: 182 [2021-01-06 21:00:08,648 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-01-06 21:00:08,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-01-06 21:00:08,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 182. [2021-01-06 21:00:08,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2021-01-06 21:00:08,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 260 transitions. [2021-01-06 21:00:08,678 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 260 transitions. Word has length 63 [2021-01-06 21:00:08,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 21:00:08,679 INFO L481 AbstractCegarLoop]: Abstraction has 182 states and 260 transitions. [2021-01-06 21:00:08,679 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 21:00:08,679 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 260 transitions. [2021-01-06 21:00:08,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-01-06 21:00:08,681 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 21:00:08,681 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 21:00:08,682 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-06 21:00:08,682 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 21:00:08,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 21:00:08,683 INFO L82 PathProgramCache]: Analyzing trace with hash 802634649, now seen corresponding path program 1 times [2021-01-06 21:00:08,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 21:00:08,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554270700] [2021-01-06 21:00:08,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 21:00:08,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 21:00:08,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 21:00:08,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554270700] [2021-01-06 21:00:08,915 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 21:00:08,915 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 21:00:08,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048562585] [2021-01-06 21:00:08,916 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 21:00:08,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 21:00:08,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 21:00:08,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-01-06 21:00:08,918 INFO L87 Difference]: Start difference. First operand 182 states and 260 transitions. Second operand 6 states. [2021-01-06 21:00:09,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 21:00:09,174 INFO L93 Difference]: Finished difference Result 421 states and 626 transitions. [2021-01-06 21:00:09,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 21:00:09,175 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 64 [2021-01-06 21:00:09,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 21:00:09,181 INFO L225 Difference]: With dead ends: 421 [2021-01-06 21:00:09,182 INFO L226 Difference]: Without dead ends: 280 [2021-01-06 21:00:09,186 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-01-06 21:00:09,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-01-06 21:00:09,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 278. [2021-01-06 21:00:09,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2021-01-06 21:00:09,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 406 transitions. [2021-01-06 21:00:09,260 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 406 transitions. Word has length 64 [2021-01-06 21:00:09,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 21:00:09,262 INFO L481 AbstractCegarLoop]: Abstraction has 278 states and 406 transitions. [2021-01-06 21:00:09,262 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 21:00:09,263 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 406 transitions. [2021-01-06 21:00:09,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-01-06 21:00:09,268 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 21:00:09,268 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 21:00:09,268 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-01-06 21:00:09,269 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 21:00:09,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 21:00:09,270 INFO L82 PathProgramCache]: Analyzing trace with hash -1237540328, now seen corresponding path program 1 times [2021-01-06 21:00:09,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 21:00:09,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467595944] [2021-01-06 21:00:09,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 21:00:09,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 21:00:09,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 21:00:09,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467595944] [2021-01-06 21:00:09,447 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 21:00:09,448 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 21:00:09,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790571467] [2021-01-06 21:00:09,449 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 21:00:09,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 21:00:09,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 21:00:09,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-01-06 21:00:09,455 INFO L87 Difference]: Start difference. First operand 278 states and 406 transitions. Second operand 5 states. [2021-01-06 21:00:09,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 21:00:09,652 INFO L93 Difference]: Finished difference Result 519 states and 773 transitions. [2021-01-06 21:00:09,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 21:00:09,653 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 65 [2021-01-06 21:00:09,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 21:00:09,658 INFO L225 Difference]: With dead ends: 519 [2021-01-06 21:00:09,658 INFO L226 Difference]: Without dead ends: 278 [2021-01-06 21:00:09,661 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-01-06 21:00:09,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-01-06 21:00:09,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 278. [2021-01-06 21:00:09,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2021-01-06 21:00:09,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 401 transitions. [2021-01-06 21:00:09,691 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 401 transitions. Word has length 65 [2021-01-06 21:00:09,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 21:00:09,694 INFO L481 AbstractCegarLoop]: Abstraction has 278 states and 401 transitions. [2021-01-06 21:00:09,694 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 21:00:09,694 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 401 transitions. [2021-01-06 21:00:09,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-01-06 21:00:09,701 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 21:00:09,701 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 21:00:09,702 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-01-06 21:00:09,702 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 21:00:09,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 21:00:09,702 INFO L82 PathProgramCache]: Analyzing trace with hash 2023216621, now seen corresponding path program 1 times [2021-01-06 21:00:09,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 21:00:09,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815352111] [2021-01-06 21:00:09,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 21:00:09,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 21:00:09,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 21:00:09,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815352111] [2021-01-06 21:00:09,825 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 21:00:09,826 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 21:00:09,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875661900] [2021-01-06 21:00:09,828 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 21:00:09,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 21:00:09,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 21:00:09,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-01-06 21:00:09,831 INFO L87 Difference]: Start difference. First operand 278 states and 401 transitions. Second operand 5 states. [2021-01-06 21:00:09,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 21:00:09,986 INFO L93 Difference]: Finished difference Result 523 states and 768 transitions. [2021-01-06 21:00:09,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 21:00:09,989 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 66 [2021-01-06 21:00:09,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 21:00:09,992 INFO L225 Difference]: With dead ends: 523 [2021-01-06 21:00:09,992 INFO L226 Difference]: Without dead ends: 278 [2021-01-06 21:00:09,994 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-01-06 21:00:09,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-01-06 21:00:10,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 278. [2021-01-06 21:00:10,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2021-01-06 21:00:10,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 396 transitions. [2021-01-06 21:00:10,027 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 396 transitions. Word has length 66 [2021-01-06 21:00:10,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 21:00:10,028 INFO L481 AbstractCegarLoop]: Abstraction has 278 states and 396 transitions. [2021-01-06 21:00:10,028 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 21:00:10,028 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 396 transitions. [2021-01-06 21:00:10,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-01-06 21:00:10,036 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 21:00:10,036 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 21:00:10,036 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-01-06 21:00:10,037 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 21:00:10,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 21:00:10,037 INFO L82 PathProgramCache]: Analyzing trace with hash -1272574804, now seen corresponding path program 1 times [2021-01-06 21:00:10,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 21:00:10,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119017008] [2021-01-06 21:00:10,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 21:00:10,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 21:00:10,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 21:00:10,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119017008] [2021-01-06 21:00:10,210 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 21:00:10,210 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-01-06 21:00:10,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920910374] [2021-01-06 21:00:10,212 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 21:00:10,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 21:00:10,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 21:00:10,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-01-06 21:00:10,215 INFO L87 Difference]: Start difference. First operand 278 states and 396 transitions. Second operand 6 states. [2021-01-06 21:00:10,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 21:00:10,430 INFO L93 Difference]: Finished difference Result 1103 states and 1635 transitions. [2021-01-06 21:00:10,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 21:00:10,431 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 67 [2021-01-06 21:00:10,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 21:00:10,438 INFO L225 Difference]: With dead ends: 1103 [2021-01-06 21:00:10,438 INFO L226 Difference]: Without dead ends: 911 [2021-01-06 21:00:10,440 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-01-06 21:00:10,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 911 states. [2021-01-06 21:00:10,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 911 to 377. [2021-01-06 21:00:10,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 377 states. [2021-01-06 21:00:10,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 547 transitions. [2021-01-06 21:00:10,518 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 547 transitions. Word has length 67 [2021-01-06 21:00:10,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 21:00:10,519 INFO L481 AbstractCegarLoop]: Abstraction has 377 states and 547 transitions. [2021-01-06 21:00:10,519 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 21:00:10,519 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 547 transitions. [2021-01-06 21:00:10,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-01-06 21:00:10,520 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 21:00:10,520 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 21:00:10,520 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-01-06 21:00:10,520 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 21:00:10,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 21:00:10,522 INFO L82 PathProgramCache]: Analyzing trace with hash 112254648, now seen corresponding path program 1 times [2021-01-06 21:00:10,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 21:00:10,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416984882] [2021-01-06 21:00:10,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 21:00:10,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 21:00:10,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 21:00:10,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416984882] [2021-01-06 21:00:10,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 21:00:10,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-01-06 21:00:10,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487257680] [2021-01-06 21:00:10,653 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 21:00:10,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 21:00:10,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 21:00:10,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 21:00:10,655 INFO L87 Difference]: Start difference. First operand 377 states and 547 transitions. Second operand 6 states. [2021-01-06 21:00:10,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 21:00:10,896 INFO L93 Difference]: Finished difference Result 1190 states and 1767 transitions. [2021-01-06 21:00:10,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 21:00:10,896 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 67 [2021-01-06 21:00:10,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 21:00:10,903 INFO L225 Difference]: With dead ends: 1190 [2021-01-06 21:00:10,904 INFO L226 Difference]: Without dead ends: 998 [2021-01-06 21:00:10,905 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 21:00:10,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 998 states. [2021-01-06 21:00:10,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 998 to 583. [2021-01-06 21:00:10,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 583 states. [2021-01-06 21:00:10,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 860 transitions. [2021-01-06 21:00:10,988 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 860 transitions. Word has length 67 [2021-01-06 21:00:10,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 21:00:10,989 INFO L481 AbstractCegarLoop]: Abstraction has 583 states and 860 transitions. [2021-01-06 21:00:10,989 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 21:00:10,989 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 860 transitions. [2021-01-06 21:00:10,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-01-06 21:00:10,990 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 21:00:10,990 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 21:00:10,990 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-01-06 21:00:10,990 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 21:00:10,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 21:00:10,991 INFO L82 PathProgramCache]: Analyzing trace with hash 943476066, now seen corresponding path program 1 times [2021-01-06 21:00:10,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 21:00:10,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937320124] [2021-01-06 21:00:10,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 21:00:11,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 21:00:11,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 21:00:11,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937320124] [2021-01-06 21:00:11,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 21:00:11,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 21:00:11,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998781420] [2021-01-06 21:00:11,048 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 21:00:11,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 21:00:11,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 21:00:11,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 21:00:11,050 INFO L87 Difference]: Start difference. First operand 583 states and 860 transitions. Second operand 3 states. [2021-01-06 21:00:11,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 21:00:11,252 INFO L93 Difference]: Finished difference Result 1505 states and 2242 transitions. [2021-01-06 21:00:11,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 21:00:11,253 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 67 [2021-01-06 21:00:11,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 21:00:11,260 INFO L225 Difference]: With dead ends: 1505 [2021-01-06 21:00:11,261 INFO L226 Difference]: Without dead ends: 1016 [2021-01-06 21:00:11,263 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 21:00:11,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1016 states. [2021-01-06 21:00:11,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1016 to 994. [2021-01-06 21:00:11,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 994 states. [2021-01-06 21:00:11,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 994 states to 994 states and 1453 transitions. [2021-01-06 21:00:11,400 INFO L78 Accepts]: Start accepts. Automaton has 994 states and 1453 transitions. Word has length 67 [2021-01-06 21:00:11,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 21:00:11,400 INFO L481 AbstractCegarLoop]: Abstraction has 994 states and 1453 transitions. [2021-01-06 21:00:11,401 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 21:00:11,401 INFO L276 IsEmpty]: Start isEmpty. Operand 994 states and 1453 transitions. [2021-01-06 21:00:11,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-01-06 21:00:11,402 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 21:00:11,402 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 21:00:11,402 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-01-06 21:00:11,402 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 21:00:11,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 21:00:11,403 INFO L82 PathProgramCache]: Analyzing trace with hash 1116055329, now seen corresponding path program 1 times [2021-01-06 21:00:11,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 21:00:11,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45517519] [2021-01-06 21:00:11,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 21:00:11,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 21:00:11,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 21:00:11,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45517519] [2021-01-06 21:00:11,463 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 21:00:11,463 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 21:00:11,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410203997] [2021-01-06 21:00:11,464 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 21:00:11,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 21:00:11,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 21:00:11,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 21:00:11,466 INFO L87 Difference]: Start difference. First operand 994 states and 1453 transitions. Second operand 3 states. [2021-01-06 21:00:11,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 21:00:11,752 INFO L93 Difference]: Finished difference Result 2436 states and 3587 transitions. [2021-01-06 21:00:11,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 21:00:11,753 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 67 [2021-01-06 21:00:11,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 21:00:11,763 INFO L225 Difference]: With dead ends: 2436 [2021-01-06 21:00:11,764 INFO L226 Difference]: Without dead ends: 1536 [2021-01-06 21:00:11,766 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 21:00:11,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1536 states. [2021-01-06 21:00:11,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1536 to 1534. [2021-01-06 21:00:11,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1534 states. [2021-01-06 21:00:11,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1534 states to 1534 states and 2235 transitions. [2021-01-06 21:00:11,981 INFO L78 Accepts]: Start accepts. Automaton has 1534 states and 2235 transitions. Word has length 67 [2021-01-06 21:00:11,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 21:00:11,982 INFO L481 AbstractCegarLoop]: Abstraction has 1534 states and 2235 transitions. [2021-01-06 21:00:11,982 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 21:00:11,982 INFO L276 IsEmpty]: Start isEmpty. Operand 1534 states and 2235 transitions. [2021-01-06 21:00:11,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-01-06 21:00:11,983 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 21:00:11,983 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 21:00:11,984 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-01-06 21:00:11,984 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 21:00:11,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 21:00:11,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1891365172, now seen corresponding path program 1 times [2021-01-06 21:00:11,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 21:00:11,985 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559910369] [2021-01-06 21:00:11,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 21:00:12,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 21:00:12,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 21:00:12,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559910369] [2021-01-06 21:00:12,095 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 21:00:12,095 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-01-06 21:00:12,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150854212] [2021-01-06 21:00:12,096 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 21:00:12,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 21:00:12,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 21:00:12,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-01-06 21:00:12,097 INFO L87 Difference]: Start difference. First operand 1534 states and 2235 transitions. Second operand 6 states. [2021-01-06 21:00:12,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 21:00:12,574 INFO L93 Difference]: Finished difference Result 3616 states and 5297 transitions. [2021-01-06 21:00:12,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 21:00:12,574 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 67 [2021-01-06 21:00:12,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 21:00:12,592 INFO L225 Difference]: With dead ends: 3616 [2021-01-06 21:00:12,592 INFO L226 Difference]: Without dead ends: 3082 [2021-01-06 21:00:12,595 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-01-06 21:00:12,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3082 states. [2021-01-06 21:00:12,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3082 to 1908. [2021-01-06 21:00:12,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1908 states. [2021-01-06 21:00:12,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1908 states to 1908 states and 2785 transitions. [2021-01-06 21:00:12,908 INFO L78 Accepts]: Start accepts. Automaton has 1908 states and 2785 transitions. Word has length 67 [2021-01-06 21:00:12,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 21:00:12,909 INFO L481 AbstractCegarLoop]: Abstraction has 1908 states and 2785 transitions. [2021-01-06 21:00:12,909 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 21:00:12,909 INFO L276 IsEmpty]: Start isEmpty. Operand 1908 states and 2785 transitions. [2021-01-06 21:00:12,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-01-06 21:00:12,910 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 21:00:12,910 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 21:00:12,911 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-01-06 21:00:12,911 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 21:00:12,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 21:00:12,912 INFO L82 PathProgramCache]: Analyzing trace with hash 2078718872, now seen corresponding path program 1 times [2021-01-06 21:00:12,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 21:00:12,912 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689198975] [2021-01-06 21:00:12,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 21:00:12,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 21:00:13,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 21:00:13,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689198975] [2021-01-06 21:00:13,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 21:00:13,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-01-06 21:00:13,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123991448] [2021-01-06 21:00:13,048 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 21:00:13,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 21:00:13,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 21:00:13,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-01-06 21:00:13,050 INFO L87 Difference]: Start difference. First operand 1908 states and 2785 transitions. Second operand 6 states. [2021-01-06 21:00:13,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 21:00:13,618 INFO L93 Difference]: Finished difference Result 3963 states and 5808 transitions. [2021-01-06 21:00:13,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 21:00:13,619 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 67 [2021-01-06 21:00:13,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 21:00:13,638 INFO L225 Difference]: With dead ends: 3963 [2021-01-06 21:00:13,638 INFO L226 Difference]: Without dead ends: 3429 [2021-01-06 21:00:13,641 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-01-06 21:00:13,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3429 states. [2021-01-06 21:00:13,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3429 to 2282. [2021-01-06 21:00:13,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2282 states. [2021-01-06 21:00:14,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2282 states to 2282 states and 3335 transitions. [2021-01-06 21:00:14,012 INFO L78 Accepts]: Start accepts. Automaton has 2282 states and 3335 transitions. Word has length 67 [2021-01-06 21:00:14,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 21:00:14,012 INFO L481 AbstractCegarLoop]: Abstraction has 2282 states and 3335 transitions. [2021-01-06 21:00:14,013 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 21:00:14,013 INFO L276 IsEmpty]: Start isEmpty. Operand 2282 states and 3335 transitions. [2021-01-06 21:00:14,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-01-06 21:00:14,014 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 21:00:14,014 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 21:00:14,014 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-01-06 21:00:14,015 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 21:00:14,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 21:00:14,015 INFO L82 PathProgramCache]: Analyzing trace with hash -654863315, now seen corresponding path program 1 times [2021-01-06 21:00:14,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 21:00:14,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608507374] [2021-01-06 21:00:14,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 21:00:14,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 21:00:14,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 21:00:14,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608507374] [2021-01-06 21:00:14,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 21:00:14,304 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-01-06 21:00:14,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069995364] [2021-01-06 21:00:14,304 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 21:00:14,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 21:00:14,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 21:00:14,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-01-06 21:00:14,305 INFO L87 Difference]: Start difference. First operand 2282 states and 3335 transitions. Second operand 10 states. [2021-01-06 21:00:15,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 21:00:15,871 INFO L93 Difference]: Finished difference Result 6789 states and 9915 transitions. [2021-01-06 21:00:15,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 21:00:15,872 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 68 [2021-01-06 21:00:15,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 21:00:15,899 INFO L225 Difference]: With dead ends: 6789 [2021-01-06 21:00:15,900 INFO L226 Difference]: Without dead ends: 4586 [2021-01-06 21:00:15,906 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2021-01-06 21:00:15,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4586 states. [2021-01-06 21:00:16,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4586 to 2282. [2021-01-06 21:00:16,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2282 states. [2021-01-06 21:00:16,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2282 states to 2282 states and 3333 transitions. [2021-01-06 21:00:16,365 INFO L78 Accepts]: Start accepts. Automaton has 2282 states and 3333 transitions. Word has length 68 [2021-01-06 21:00:16,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 21:00:16,365 INFO L481 AbstractCegarLoop]: Abstraction has 2282 states and 3333 transitions. [2021-01-06 21:00:16,365 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 21:00:16,366 INFO L276 IsEmpty]: Start isEmpty. Operand 2282 states and 3333 transitions. [2021-01-06 21:00:16,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-01-06 21:00:16,367 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 21:00:16,367 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 21:00:16,367 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-01-06 21:00:16,368 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 21:00:16,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 21:00:16,368 INFO L82 PathProgramCache]: Analyzing trace with hash 302063151, now seen corresponding path program 1 times [2021-01-06 21:00:16,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 21:00:16,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622931825] [2021-01-06 21:00:16,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 21:00:16,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 21:00:16,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 21:00:16,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622931825] [2021-01-06 21:00:16,681 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 21:00:16,682 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-01-06 21:00:16,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027216705] [2021-01-06 21:00:16,682 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 21:00:16,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 21:00:16,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 21:00:16,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-01-06 21:00:16,684 INFO L87 Difference]: Start difference. First operand 2282 states and 3333 transitions. Second operand 12 states. [2021-01-06 21:00:17,171 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 40 [2021-01-06 21:00:21,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 21:00:21,447 INFO L93 Difference]: Finished difference Result 22262 states and 32397 transitions. [2021-01-06 21:00:21,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-06 21:00:21,448 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 69 [2021-01-06 21:00:21,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 21:00:21,536 INFO L225 Difference]: With dead ends: 22262 [2021-01-06 21:00:21,536 INFO L226 Difference]: Without dead ends: 20082 [2021-01-06 21:00:21,548 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=279, Invalid=911, Unknown=0, NotChecked=0, Total=1190 [2021-01-06 21:00:21,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20082 states. [2021-01-06 21:00:22,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20082 to 2288. [2021-01-06 21:00:22,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2288 states. [2021-01-06 21:00:22,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2288 states to 2288 states and 3339 transitions. [2021-01-06 21:00:22,377 INFO L78 Accepts]: Start accepts. Automaton has 2288 states and 3339 transitions. Word has length 69 [2021-01-06 21:00:22,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 21:00:22,378 INFO L481 AbstractCegarLoop]: Abstraction has 2288 states and 3339 transitions. [2021-01-06 21:00:22,378 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 21:00:22,378 INFO L276 IsEmpty]: Start isEmpty. Operand 2288 states and 3339 transitions. [2021-01-06 21:00:22,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-01-06 21:00:22,379 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 21:00:22,379 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 21:00:22,380 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-01-06 21:00:22,380 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 21:00:22,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 21:00:22,381 INFO L82 PathProgramCache]: Analyzing trace with hash 69264625, now seen corresponding path program 1 times [2021-01-06 21:00:22,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 21:00:22,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086435161] [2021-01-06 21:00:22,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 21:00:22,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 21:00:22,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 21:00:22,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086435161] [2021-01-06 21:00:22,617 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 21:00:22,617 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-01-06 21:00:22,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240090441] [2021-01-06 21:00:22,618 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 21:00:22,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 21:00:22,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 21:00:22,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-01-06 21:00:22,620 INFO L87 Difference]: Start difference. First operand 2288 states and 3339 transitions. Second operand 9 states. [2021-01-06 21:00:23,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 21:00:23,856 INFO L93 Difference]: Finished difference Result 5594 states and 8190 transitions. [2021-01-06 21:00:23,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 21:00:23,856 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 69 [2021-01-06 21:00:23,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 21:00:23,865 INFO L225 Difference]: With dead ends: 5594 [2021-01-06 21:00:23,866 INFO L226 Difference]: Without dead ends: 3383 [2021-01-06 21:00:23,871 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2021-01-06 21:00:23,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3383 states. [2021-01-06 21:00:24,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3383 to 2288. [2021-01-06 21:00:24,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2288 states. [2021-01-06 21:00:24,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2288 states to 2288 states and 3338 transitions. [2021-01-06 21:00:24,431 INFO L78 Accepts]: Start accepts. Automaton has 2288 states and 3338 transitions. Word has length 69 [2021-01-06 21:00:24,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 21:00:24,432 INFO L481 AbstractCegarLoop]: Abstraction has 2288 states and 3338 transitions. [2021-01-06 21:00:24,432 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 21:00:24,432 INFO L276 IsEmpty]: Start isEmpty. Operand 2288 states and 3338 transitions. [2021-01-06 21:00:24,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-01-06 21:00:24,433 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 21:00:24,434 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 21:00:24,434 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-01-06 21:00:24,434 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 21:00:24,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 21:00:24,435 INFO L82 PathProgramCache]: Analyzing trace with hash 770281693, now seen corresponding path program 1 times [2021-01-06 21:00:24,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 21:00:24,435 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817533551] [2021-01-06 21:00:24,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 21:00:24,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 21:00:24,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 21:00:24,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817533551] [2021-01-06 21:00:24,712 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 21:00:24,713 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-01-06 21:00:24,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112553373] [2021-01-06 21:00:24,713 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 21:00:24,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 21:00:24,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 21:00:24,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-01-06 21:00:24,715 INFO L87 Difference]: Start difference. First operand 2288 states and 3338 transitions. Second operand 10 states. [2021-01-06 21:00:26,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 21:00:26,557 INFO L93 Difference]: Finished difference Result 6774 states and 9886 transitions. [2021-01-06 21:00:26,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 21:00:26,558 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 69 [2021-01-06 21:00:26,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 21:00:26,575 INFO L225 Difference]: With dead ends: 6774 [2021-01-06 21:00:26,576 INFO L226 Difference]: Without dead ends: 4581 [2021-01-06 21:00:26,584 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2021-01-06 21:00:26,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4581 states. [2021-01-06 21:00:27,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4581 to 2282. [2021-01-06 21:00:27,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2282 states. [2021-01-06 21:00:27,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2282 states to 2282 states and 3328 transitions. [2021-01-06 21:00:27,086 INFO L78 Accepts]: Start accepts. Automaton has 2282 states and 3328 transitions. Word has length 69 [2021-01-06 21:00:27,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 21:00:27,087 INFO L481 AbstractCegarLoop]: Abstraction has 2282 states and 3328 transitions. [2021-01-06 21:00:27,087 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 21:00:27,087 INFO L276 IsEmpty]: Start isEmpty. Operand 2282 states and 3328 transitions. [2021-01-06 21:00:27,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-01-06 21:00:27,088 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 21:00:27,088 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 21:00:27,088 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-01-06 21:00:27,089 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 21:00:27,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 21:00:27,089 INFO L82 PathProgramCache]: Analyzing trace with hash -2136147335, now seen corresponding path program 1 times [2021-01-06 21:00:27,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 21:00:27,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851269364] [2021-01-06 21:00:27,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 21:00:27,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 21:00:27,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 21:00:27,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851269364] [2021-01-06 21:00:27,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 21:00:27,293 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-01-06 21:00:27,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503951708] [2021-01-06 21:00:27,293 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 21:00:27,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 21:00:27,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 21:00:27,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-01-06 21:00:27,294 INFO L87 Difference]: Start difference. First operand 2282 states and 3328 transitions. Second operand 10 states. [2021-01-06 21:00:28,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 21:00:28,934 INFO L93 Difference]: Finished difference Result 6740 states and 9832 transitions. [2021-01-06 21:00:28,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 21:00:28,935 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 70 [2021-01-06 21:00:28,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 21:00:28,947 INFO L225 Difference]: With dead ends: 6740 [2021-01-06 21:00:28,947 INFO L226 Difference]: Without dead ends: 4571 [2021-01-06 21:00:28,953 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=127, Invalid=335, Unknown=0, NotChecked=0, Total=462 [2021-01-06 21:00:28,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4571 states. [2021-01-06 21:00:29,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4571 to 2282. [2021-01-06 21:00:29,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2282 states. [2021-01-06 21:00:29,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2282 states to 2282 states and 3323 transitions. [2021-01-06 21:00:29,606 INFO L78 Accepts]: Start accepts. Automaton has 2282 states and 3323 transitions. Word has length 70 [2021-01-06 21:00:29,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 21:00:29,606 INFO L481 AbstractCegarLoop]: Abstraction has 2282 states and 3323 transitions. [2021-01-06 21:00:29,607 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 21:00:29,607 INFO L276 IsEmpty]: Start isEmpty. Operand 2282 states and 3323 transitions. [2021-01-06 21:00:29,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-01-06 21:00:29,608 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 21:00:29,608 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 21:00:29,608 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-01-06 21:00:29,608 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 21:00:29,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 21:00:29,609 INFO L82 PathProgramCache]: Analyzing trace with hash -425050317, now seen corresponding path program 1 times [2021-01-06 21:00:29,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 21:00:29,609 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002818645] [2021-01-06 21:00:29,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 21:00:29,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 21:00:31,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 21:00:31,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002818645] [2021-01-06 21:00:31,138 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 21:00:31,138 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2021-01-06 21:00:31,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310934103] [2021-01-06 21:00:31,139 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-01-06 21:00:31,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 21:00:31,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-01-06 21:00:31,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=683, Unknown=0, NotChecked=0, Total=756 [2021-01-06 21:00:31,141 INFO L87 Difference]: Start difference. First operand 2282 states and 3323 transitions. Second operand 28 states. [2021-01-06 21:00:31,556 WARN L197 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 94 [2021-01-06 21:00:32,217 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-01-06 21:00:32,426 WARN L197 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-01-06 21:00:32,616 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 37 [2021-01-06 21:00:33,033 WARN L197 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 45 [2021-01-06 21:00:33,306 WARN L197 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2021-01-06 21:00:33,641 WARN L197 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 69 [2021-01-06 21:00:34,021 WARN L197 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 80 [2021-01-06 21:00:34,492 WARN L197 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 89 [2021-01-06 21:00:34,985 WARN L197 SmtUtils]: Spent 406.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 95 [2021-01-06 21:00:35,560 WARN L197 SmtUtils]: Spent 469.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 107 [2021-01-06 21:00:35,861 WARN L197 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 65 [2021-01-06 21:00:36,162 WARN L197 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 65 [2021-01-06 21:00:36,461 WARN L197 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 63 [2021-01-06 21:00:36,912 WARN L197 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 65 [2021-01-06 21:00:37,240 WARN L197 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2021-01-06 21:00:43,153 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2021-01-06 21:00:46,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 21:00:46,134 INFO L93 Difference]: Finished difference Result 13764 states and 20179 transitions. [2021-01-06 21:00:46,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-01-06 21:00:46,135 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 71 [2021-01-06 21:00:46,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 21:00:46,167 INFO L225 Difference]: With dead ends: 13764 [2021-01-06 21:00:46,167 INFO L226 Difference]: Without dead ends: 13228 [2021-01-06 21:00:46,173 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=531, Invalid=2439, Unknown=0, NotChecked=0, Total=2970 [2021-01-06 21:00:46,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13228 states. [2021-01-06 21:00:46,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13228 to 2292. [2021-01-06 21:00:46,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2292 states. [2021-01-06 21:00:46,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2292 states to 2292 states and 3335 transitions. [2021-01-06 21:00:46,852 INFO L78 Accepts]: Start accepts. Automaton has 2292 states and 3335 transitions. Word has length 71 [2021-01-06 21:00:46,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 21:00:46,853 INFO L481 AbstractCegarLoop]: Abstraction has 2292 states and 3335 transitions. [2021-01-06 21:00:46,853 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2021-01-06 21:00:46,853 INFO L276 IsEmpty]: Start isEmpty. Operand 2292 states and 3335 transitions. [2021-01-06 21:00:46,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-01-06 21:00:46,854 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 21:00:46,854 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 21:00:46,855 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-01-06 21:00:46,855 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 21:00:46,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 21:00:46,855 INFO L82 PathProgramCache]: Analyzing trace with hash 1932415602, now seen corresponding path program 1 times [2021-01-06 21:00:46,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 21:00:46,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617039029] [2021-01-06 21:00:46,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 21:00:46,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 21:00:48,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 21:00:48,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617039029] [2021-01-06 21:00:48,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 21:00:48,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2021-01-06 21:00:48,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116483253] [2021-01-06 21:00:48,137 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-01-06 21:00:48,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 21:00:48,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-01-06 21:00:48,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2021-01-06 21:00:48,139 INFO L87 Difference]: Start difference. First operand 2292 states and 3335 transitions. Second operand 27 states. [2021-01-06 21:00:48,476 WARN L197 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 89 [2021-01-06 21:00:48,977 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2021-01-06 21:00:49,167 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2021-01-06 21:00:49,336 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2021-01-06 21:00:49,728 WARN L197 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2021-01-06 21:00:49,927 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2021-01-06 21:00:50,159 WARN L197 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2021-01-06 21:00:50,395 WARN L197 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2021-01-06 21:00:50,689 WARN L197 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 67 [2021-01-06 21:00:51,013 WARN L197 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 77 [2021-01-06 21:00:51,415 WARN L197 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 87 [2021-01-06 21:00:51,650 WARN L197 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2021-01-06 21:00:51,892 WARN L197 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2021-01-06 21:00:52,139 WARN L197 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2021-01-06 21:00:52,498 WARN L197 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2021-01-06 21:00:52,767 WARN L197 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2021-01-06 21:00:53,927 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2021-01-06 21:00:54,543 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2021-01-06 21:00:54,882 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 43 [2021-01-06 21:01:00,151 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 39 [2021-01-06 21:01:05,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 21:01:05,260 INFO L93 Difference]: Finished difference Result 19710 states and 28919 transitions. [2021-01-06 21:01:05,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-01-06 21:01:05,261 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 71 [2021-01-06 21:01:05,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 21:01:05,292 INFO L225 Difference]: With dead ends: 19710 [2021-01-06 21:01:05,292 INFO L226 Difference]: Without dead ends: 19175 [2021-01-06 21:01:05,300 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 699 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=569, Invalid=2853, Unknown=0, NotChecked=0, Total=3422 [2021-01-06 21:01:05,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19175 states. [2021-01-06 21:01:06,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19175 to 2297. [2021-01-06 21:01:06,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2297 states. [2021-01-06 21:01:06,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2297 states to 2297 states and 3341 transitions. [2021-01-06 21:01:06,223 INFO L78 Accepts]: Start accepts. Automaton has 2297 states and 3341 transitions. Word has length 71 [2021-01-06 21:01:06,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 21:01:06,223 INFO L481 AbstractCegarLoop]: Abstraction has 2297 states and 3341 transitions. [2021-01-06 21:01:06,223 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2021-01-06 21:01:06,224 INFO L276 IsEmpty]: Start isEmpty. Operand 2297 states and 3341 transitions. [2021-01-06 21:01:06,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-01-06 21:01:06,225 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 21:01:06,225 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 21:01:06,225 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-01-06 21:01:06,225 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 21:01:06,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 21:01:06,226 INFO L82 PathProgramCache]: Analyzing trace with hash -748125324, now seen corresponding path program 1 times [2021-01-06 21:01:06,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 21:01:06,226 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881964509] [2021-01-06 21:01:06,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 21:01:06,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 21:01:08,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 21:01:08,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881964509] [2021-01-06 21:01:08,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 21:01:08,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2021-01-06 21:01:08,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527208583] [2021-01-06 21:01:08,168 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-01-06 21:01:08,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 21:01:08,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-01-06 21:01:08,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-01-06 21:01:08,170 INFO L87 Difference]: Start difference. First operand 2297 states and 3341 transitions. Second operand 28 states. [2021-01-06 21:01:08,781 WARN L197 SmtUtils]: Spent 542.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 105 [2021-01-06 21:01:09,383 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 28 [2021-01-06 21:01:09,578 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 30 [2021-01-06 21:01:09,808 WARN L197 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2021-01-06 21:01:10,059 WARN L197 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 37 [2021-01-06 21:01:10,318 WARN L197 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 42 [2021-01-06 21:01:10,837 WARN L197 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 47 [2021-01-06 21:01:11,179 WARN L197 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 65 [2021-01-06 21:01:11,617 WARN L197 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 74 [2021-01-06 21:01:12,082 WARN L197 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 82 [2021-01-06 21:01:12,666 WARN L197 SmtUtils]: Spent 451.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 100 [2021-01-06 21:01:13,318 WARN L197 SmtUtils]: Spent 534.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 113 [2021-01-06 21:01:14,133 WARN L197 SmtUtils]: Spent 682.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 122 [2021-01-06 21:01:14,504 WARN L197 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 68 [2021-01-06 21:01:14,913 WARN L197 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 68 [2021-01-06 21:01:15,287 WARN L197 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 66 [2021-01-06 21:01:15,830 WARN L197 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 67 [2021-01-06 21:01:16,256 WARN L197 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 61 [2021-01-06 21:01:16,723 WARN L197 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 58 [2021-01-06 21:01:17,212 WARN L197 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 62 [2021-01-06 21:01:17,612 WARN L197 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 58 [2021-01-06 21:01:17,989 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 34 [2021-01-06 21:01:18,335 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 34 [2021-01-06 21:01:18,843 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 36 [2021-01-06 21:01:29,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 21:01:29,179 INFO L93 Difference]: Finished difference Result 17555 states and 25744 transitions. [2021-01-06 21:01:29,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-01-06 21:01:29,180 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 71 [2021-01-06 21:01:29,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 21:01:29,202 INFO L225 Difference]: With dead ends: 17555 [2021-01-06 21:01:29,202 INFO L226 Difference]: Without dead ends: 17019 [2021-01-06 21:01:29,211 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=664, Invalid=2642, Unknown=0, NotChecked=0, Total=3306 [2021-01-06 21:01:29,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17019 states. [2021-01-06 21:01:30,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17019 to 2297. [2021-01-06 21:01:30,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2297 states. [2021-01-06 21:01:30,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2297 states to 2297 states and 3341 transitions. [2021-01-06 21:01:30,524 INFO L78 Accepts]: Start accepts. Automaton has 2297 states and 3341 transitions. Word has length 71 [2021-01-06 21:01:30,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 21:01:30,525 INFO L481 AbstractCegarLoop]: Abstraction has 2297 states and 3341 transitions. [2021-01-06 21:01:30,525 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2021-01-06 21:01:30,525 INFO L276 IsEmpty]: Start isEmpty. Operand 2297 states and 3341 transitions. [2021-01-06 21:01:30,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-01-06 21:01:30,526 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 21:01:30,526 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 21:01:30,526 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-01-06 21:01:30,526 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 21:01:30,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 21:01:30,527 INFO L82 PathProgramCache]: Analyzing trace with hash 1237414452, now seen corresponding path program 1 times [2021-01-06 21:01:30,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 21:01:30,527 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994558194] [2021-01-06 21:01:30,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 21:01:30,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 21:01:32,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 21:01:32,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994558194] [2021-01-06 21:01:32,143 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 21:01:32,144 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2021-01-06 21:01:32,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389408108] [2021-01-06 21:01:32,144 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-01-06 21:01:32,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 21:01:32,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-01-06 21:01:32,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=585, Unknown=0, NotChecked=0, Total=650 [2021-01-06 21:01:32,146 INFO L87 Difference]: Start difference. First operand 2297 states and 3341 transitions. Second operand 26 states. [2021-01-06 21:01:32,662 WARN L197 SmtUtils]: Spent 412.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 81 [2021-01-06 21:01:33,419 WARN L197 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2021-01-06 21:01:33,647 WARN L197 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2021-01-06 21:01:33,874 WARN L197 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-01-06 21:01:34,389 WARN L197 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2021-01-06 21:01:34,689 WARN L197 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2021-01-06 21:01:35,109 WARN L197 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2021-01-06 21:01:35,548 WARN L197 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 72 [2021-01-06 21:01:36,108 WARN L197 SmtUtils]: Spent 417.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 81 [2021-01-06 21:01:36,690 WARN L197 SmtUtils]: Spent 479.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 89 [2021-01-06 21:01:37,419 WARN L197 SmtUtils]: Spent 587.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 102 [2021-01-06 21:01:37,765 WARN L197 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2021-01-06 21:01:38,096 WARN L197 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2021-01-06 21:01:38,389 WARN L197 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2021-01-06 21:01:40,399 WARN L197 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2021-01-06 21:01:41,030 WARN L197 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2021-01-06 21:01:48,509 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2021-01-06 21:01:53,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 21:01:53,102 INFO L93 Difference]: Finished difference Result 15580 states and 22842 transitions. [2021-01-06 21:01:53,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-01-06 21:01:53,103 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 71 [2021-01-06 21:01:53,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 21:01:53,119 INFO L225 Difference]: With dead ends: 15580 [2021-01-06 21:01:53,119 INFO L226 Difference]: Without dead ends: 14682 [2021-01-06 21:01:53,125 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=446, Invalid=2524, Unknown=0, NotChecked=0, Total=2970 [2021-01-06 21:01:53,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14682 states. [2021-01-06 21:01:54,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14682 to 2311. [2021-01-06 21:01:54,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2311 states. [2021-01-06 21:01:54,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2311 states to 2311 states and 3358 transitions. [2021-01-06 21:01:54,176 INFO L78 Accepts]: Start accepts. Automaton has 2311 states and 3358 transitions. Word has length 71 [2021-01-06 21:01:54,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 21:01:54,177 INFO L481 AbstractCegarLoop]: Abstraction has 2311 states and 3358 transitions. [2021-01-06 21:01:54,177 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2021-01-06 21:01:54,177 INFO L276 IsEmpty]: Start isEmpty. Operand 2311 states and 3358 transitions. [2021-01-06 21:01:54,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-01-06 21:01:54,178 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 21:01:54,178 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 21:01:54,179 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-01-06 21:01:54,179 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 21:01:54,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 21:01:54,179 INFO L82 PathProgramCache]: Analyzing trace with hash 1749525204, now seen corresponding path program 1 times [2021-01-06 21:01:54,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 21:01:54,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676992926] [2021-01-06 21:01:54,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 21:01:54,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 21:01:56,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 21:01:56,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676992926] [2021-01-06 21:01:56,263 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 21:01:56,263 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2021-01-06 21:01:56,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137376205] [2021-01-06 21:01:56,264 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-01-06 21:01:56,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 21:01:56,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-01-06 21:01:56,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2021-01-06 21:01:56,265 INFO L87 Difference]: Start difference. First operand 2311 states and 3358 transitions. Second operand 28 states. [2021-01-06 21:01:56,751 WARN L197 SmtUtils]: Spent 413.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 109 [2021-01-06 21:01:57,103 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 23 [2021-01-06 21:01:57,352 WARN L197 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2021-01-06 21:01:57,603 WARN L197 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2021-01-06 21:01:57,990 WARN L197 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2021-01-06 21:01:58,358 WARN L197 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2021-01-06 21:01:58,672 WARN L197 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2021-01-06 21:01:59,308 WARN L197 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2021-01-06 21:01:59,711 WARN L197 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 66 [2021-01-06 21:02:00,217 WARN L197 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 78 [2021-01-06 21:02:00,776 WARN L197 SmtUtils]: Spent 450.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 95 [2021-01-06 21:02:01,465 WARN L197 SmtUtils]: Spent 540.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 106 [2021-01-06 21:02:02,196 WARN L197 SmtUtils]: Spent 608.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 118 [2021-01-06 21:02:03,060 WARN L197 SmtUtils]: Spent 715.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 134 [2021-01-06 21:02:03,521 WARN L197 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 71 [2021-01-06 21:02:03,986 WARN L197 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 71 [2021-01-06 21:02:04,395 WARN L197 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2021-01-06 21:02:04,773 WARN L197 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2021-01-06 21:02:05,259 WARN L197 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2021-01-06 21:02:05,587 WARN L197 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 41 [2021-01-06 21:02:06,020 WARN L197 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 41 [2021-01-06 21:02:06,212 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 30 [2021-01-06 21:02:06,808 WARN L197 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 38 [2021-01-06 21:02:07,341 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 34 [2021-01-06 21:02:07,884 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 34 [2021-01-06 21:02:16,854 WARN L197 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2021-01-06 21:02:19,711 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 27 [2021-01-06 21:02:20,507 WARN L197 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 41 [2021-01-06 21:02:22,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 21:02:22,185 INFO L93 Difference]: Finished difference Result 14038 states and 20574 transitions. [2021-01-06 21:02:22,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-01-06 21:02:22,187 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 71 [2021-01-06 21:02:22,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 21:02:22,201 INFO L225 Difference]: With dead ends: 14038 [2021-01-06 21:02:22,201 INFO L226 Difference]: Without dead ends: 13502 [2021-01-06 21:02:22,206 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 628 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=532, Invalid=2890, Unknown=0, NotChecked=0, Total=3422 [2021-01-06 21:02:22,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13502 states. [2021-01-06 21:02:23,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13502 to 2317. [2021-01-06 21:02:23,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2317 states. [2021-01-06 21:02:23,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2317 states to 2317 states and 3367 transitions. [2021-01-06 21:02:23,204 INFO L78 Accepts]: Start accepts. Automaton has 2317 states and 3367 transitions. Word has length 71 [2021-01-06 21:02:23,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 21:02:23,205 INFO L481 AbstractCegarLoop]: Abstraction has 2317 states and 3367 transitions. [2021-01-06 21:02:23,205 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2021-01-06 21:02:23,205 INFO L276 IsEmpty]: Start isEmpty. Operand 2317 states and 3367 transitions. [2021-01-06 21:02:23,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-01-06 21:02:23,206 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 21:02:23,206 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 21:02:23,206 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-01-06 21:02:23,206 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 21:02:23,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 21:02:23,207 INFO L82 PathProgramCache]: Analyzing trace with hash -187976173, now seen corresponding path program 1 times [2021-01-06 21:02:23,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 21:02:23,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997733929] [2021-01-06 21:02:23,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 21:02:23,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 21:02:24,524 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-01-06 21:02:25,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 21:02:25,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997733929] [2021-01-06 21:02:25,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 21:02:25,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2021-01-06 21:02:25,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584380664] [2021-01-06 21:02:25,288 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-01-06 21:02:25,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 21:02:25,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-01-06 21:02:25,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=632, Unknown=0, NotChecked=0, Total=702 [2021-01-06 21:02:25,290 INFO L87 Difference]: Start difference. First operand 2317 states and 3367 transitions. Second operand 27 states. [2021-01-06 21:02:25,779 WARN L197 SmtUtils]: Spent 422.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 87 [2021-01-06 21:02:26,513 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 28 [2021-01-06 21:02:26,769 WARN L197 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 36 [2021-01-06 21:02:27,028 WARN L197 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2021-01-06 21:02:27,262 WARN L197 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 36 [2021-01-06 21:02:27,735 WARN L197 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2021-01-06 21:02:28,051 WARN L197 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 54 [2021-01-06 21:02:28,437 WARN L197 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 63 [2021-01-06 21:02:29,029 WARN L197 SmtUtils]: Spent 479.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 72 [2021-01-06 21:02:29,738 WARN L197 SmtUtils]: Spent 565.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 81 [2021-01-06 21:02:30,520 WARN L197 SmtUtils]: Spent 663.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 92 [2021-01-06 21:02:31,451 WARN L197 SmtUtils]: Spent 790.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 106 [2021-01-06 21:02:31,930 WARN L197 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 60 [2021-01-06 21:02:32,415 WARN L197 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 60 [2021-01-06 21:02:32,751 WARN L197 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2021-01-06 21:02:33,088 WARN L197 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2021-01-06 21:02:33,382 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2021-01-06 21:02:33,790 WARN L197 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2021-01-06 21:02:34,123 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2021-01-06 21:02:34,457 WARN L197 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2021-01-06 21:02:34,649 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2021-01-06 21:02:35,854 WARN L197 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2021-01-06 21:02:36,493 WARN L197 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2021-01-06 21:02:36,917 WARN L197 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2021-01-06 21:02:37,659 WARN L197 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 31 [2021-01-06 21:02:44,164 WARN L197 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 36 [2021-01-06 21:02:47,163 WARN L197 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2021-01-06 21:02:53,016 WARN L197 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 32 [2021-01-06 21:02:58,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 21:02:58,840 INFO L93 Difference]: Finished difference Result 29585 states and 43415 transitions. [2021-01-06 21:02:58,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-01-06 21:02:58,843 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 71 [2021-01-06 21:02:58,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 21:02:58,888 INFO L225 Difference]: With dead ends: 29585 [2021-01-06 21:02:58,888 INFO L226 Difference]: Without dead ends: 28687 [2021-01-06 21:02:58,896 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 743 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=658, Invalid=3374, Unknown=0, NotChecked=0, Total=4032 [2021-01-06 21:02:58,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28687 states. [2021-01-06 21:03:00,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28687 to 2327. [2021-01-06 21:03:00,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2327 states. [2021-01-06 21:03:00,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2327 states to 2327 states and 3379 transitions. [2021-01-06 21:03:00,102 INFO L78 Accepts]: Start accepts. Automaton has 2327 states and 3379 transitions. Word has length 71 [2021-01-06 21:03:00,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 21:03:00,102 INFO L481 AbstractCegarLoop]: Abstraction has 2327 states and 3379 transitions. [2021-01-06 21:03:00,102 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2021-01-06 21:03:00,102 INFO L276 IsEmpty]: Start isEmpty. Operand 2327 states and 3379 transitions. [2021-01-06 21:03:00,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-01-06 21:03:00,103 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 21:03:00,103 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 21:03:00,103 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-01-06 21:03:00,103 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 21:03:00,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 21:03:00,105 INFO L82 PathProgramCache]: Analyzing trace with hash -78323220, now seen corresponding path program 1 times [2021-01-06 21:03:00,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 21:03:00,106 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935745249] [2021-01-06 21:03:00,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 21:03:00,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 21:03:00,793 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2021-01-06 21:03:01,076 WARN L197 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2021-01-06 21:03:01,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 21:03:01,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935745249] [2021-01-06 21:03:01,528 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 21:03:01,529 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-01-06 21:03:01,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192834880] [2021-01-06 21:03:01,529 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 21:03:01,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 21:03:01,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 21:03:01,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-01-06 21:03:01,530 INFO L87 Difference]: Start difference. First operand 2327 states and 3379 transitions. Second operand 17 states. [2021-01-06 21:03:01,714 WARN L197 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 31 [2021-01-06 21:03:02,003 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 22 [2021-01-06 21:03:02,174 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 23 [2021-01-06 21:03:02,421 WARN L197 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2021-01-06 21:03:02,710 WARN L197 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-01-06 21:03:02,960 WARN L197 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2021-01-06 21:03:03,397 WARN L197 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 64 [2021-01-06 21:03:03,712 WARN L197 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2021-01-06 21:03:04,044 WARN L197 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2021-01-06 21:03:04,337 WARN L197 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2021-01-06 21:03:04,608 WARN L197 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2021-01-06 21:03:04,847 WARN L197 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2021-01-06 21:03:05,048 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2021-01-06 21:03:05,284 WARN L197 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2021-01-06 21:03:05,740 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 27 [2021-01-06 21:03:06,558 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2021-01-06 21:03:11,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 21:03:11,533 INFO L93 Difference]: Finished difference Result 10328 states and 15118 transitions. [2021-01-06 21:03:11,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-06 21:03:11,536 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 72 [2021-01-06 21:03:11,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 21:03:11,548 INFO L225 Difference]: With dead ends: 10328 [2021-01-06 21:03:11,549 INFO L226 Difference]: Without dead ends: 9398 [2021-01-06 21:03:11,552 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=282, Invalid=908, Unknown=0, NotChecked=0, Total=1190 [2021-01-06 21:03:11,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9398 states. [2021-01-06 21:03:12,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9398 to 2312. [2021-01-06 21:03:12,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2312 states. [2021-01-06 21:03:12,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2312 states to 2312 states and 3357 transitions. [2021-01-06 21:03:12,678 INFO L78 Accepts]: Start accepts. Automaton has 2312 states and 3357 transitions. Word has length 72 [2021-01-06 21:03:12,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 21:03:12,679 INFO L481 AbstractCegarLoop]: Abstraction has 2312 states and 3357 transitions. [2021-01-06 21:03:12,679 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 21:03:12,679 INFO L276 IsEmpty]: Start isEmpty. Operand 2312 states and 3357 transitions. [2021-01-06 21:03:12,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-01-06 21:03:12,681 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 21:03:12,681 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 21:03:12,681 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-01-06 21:03:12,681 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 21:03:12,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 21:03:12,682 INFO L82 PathProgramCache]: Analyzing trace with hash 1932679112, now seen corresponding path program 1 times [2021-01-06 21:03:12,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 21:03:12,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865622152] [2021-01-06 21:03:12,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 21:03:12,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 21:03:13,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 21:03:13,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865622152] [2021-01-06 21:03:13,445 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 21:03:13,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-01-06 21:03:13,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59054798] [2021-01-06 21:03:13,446 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 21:03:13,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 21:03:13,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 21:03:13,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-01-06 21:03:13,447 INFO L87 Difference]: Start difference. First operand 2312 states and 3357 transitions. Second operand 13 states. [2021-01-06 21:03:13,901 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 21 [2021-01-06 21:03:14,262 WARN L197 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 36 [2021-01-06 21:03:14,633 WARN L197 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 45 [2021-01-06 21:03:15,020 WARN L197 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 45 [2021-01-06 21:03:15,181 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-01-06 21:03:15,361 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-01-06 21:03:15,721 WARN L197 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 41 [2021-01-06 21:03:16,211 WARN L197 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 39 [2021-01-06 21:03:20,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 21:03:20,843 INFO L93 Difference]: Finished difference Result 9745 states and 14276 transitions. [2021-01-06 21:03:20,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 21:03:20,844 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 72 [2021-01-06 21:03:20,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 21:03:20,855 INFO L225 Difference]: With dead ends: 9745 [2021-01-06 21:03:20,855 INFO L226 Difference]: Without dead ends: 8825 [2021-01-06 21:03:20,858 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2021-01-06 21:03:20,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8825 states. [2021-01-06 21:03:22,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8825 to 2287. [2021-01-06 21:03:22,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2287 states. [2021-01-06 21:03:22,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2287 states to 2287 states and 3323 transitions. [2021-01-06 21:03:22,033 INFO L78 Accepts]: Start accepts. Automaton has 2287 states and 3323 transitions. Word has length 72 [2021-01-06 21:03:22,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 21:03:22,033 INFO L481 AbstractCegarLoop]: Abstraction has 2287 states and 3323 transitions. [2021-01-06 21:03:22,033 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 21:03:22,033 INFO L276 IsEmpty]: Start isEmpty. Operand 2287 states and 3323 transitions. [2021-01-06 21:03:22,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-01-06 21:03:22,034 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 21:03:22,034 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 21:03:22,035 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-01-06 21:03:22,035 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 21:03:22,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 21:03:22,035 INFO L82 PathProgramCache]: Analyzing trace with hash -4822265, now seen corresponding path program 1 times [2021-01-06 21:03:22,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 21:03:22,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819147992] [2021-01-06 21:03:22,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 21:03:22,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 21:03:22,413 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2021-01-06 21:03:22,546 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 20 [2021-01-06 21:03:22,695 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 22 [2021-01-06 21:03:22,941 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-01-06 21:03:23,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 21:03:23,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819147992] [2021-01-06 21:03:23,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 21:03:23,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-01-06 21:03:23,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775958530] [2021-01-06 21:03:23,508 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 21:03:23,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 21:03:23,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 21:03:23,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-01-06 21:03:23,509 INFO L87 Difference]: Start difference. First operand 2287 states and 3323 transitions. Second operand 16 states. [2021-01-06 21:03:23,696 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 23 [2021-01-06 21:03:24,094 WARN L197 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 24 [2021-01-06 21:03:24,436 WARN L197 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 23 [2021-01-06 21:03:24,751 WARN L197 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 30 [2021-01-06 21:03:25,374 WARN L197 SmtUtils]: Spent 556.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2021-01-06 21:03:26,101 WARN L197 SmtUtils]: Spent 675.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 62 [2021-01-06 21:03:26,500 WARN L197 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 36 [2021-01-06 21:03:26,873 WARN L197 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 36 [2021-01-06 21:03:27,196 WARN L197 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2021-01-06 21:03:27,784 WARN L197 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 29 [2021-01-06 21:03:28,852 WARN L197 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2021-01-06 21:03:35,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 21:03:35,121 INFO L93 Difference]: Finished difference Result 10720 states and 15745 transitions. [2021-01-06 21:03:35,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 21:03:35,123 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 72 [2021-01-06 21:03:35,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 21:03:35,133 INFO L225 Difference]: With dead ends: 10720 [2021-01-06 21:03:35,133 INFO L226 Difference]: Without dead ends: 9822 [2021-01-06 21:03:35,136 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=209, Invalid=721, Unknown=0, NotChecked=0, Total=930 [2021-01-06 21:03:35,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9822 states. [2021-01-06 21:03:36,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9822 to 2279. [2021-01-06 21:03:36,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2279 states. [2021-01-06 21:03:36,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2279 states to 2279 states and 3312 transitions. [2021-01-06 21:03:36,388 INFO L78 Accepts]: Start accepts. Automaton has 2279 states and 3312 transitions. Word has length 72 [2021-01-06 21:03:36,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 21:03:36,389 INFO L481 AbstractCegarLoop]: Abstraction has 2279 states and 3312 transitions. [2021-01-06 21:03:36,389 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 21:03:36,389 INFO L276 IsEmpty]: Start isEmpty. Operand 2279 states and 3312 transitions. [2021-01-06 21:03:36,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-01-06 21:03:36,390 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 21:03:36,390 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 21:03:36,390 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-01-06 21:03:36,390 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 21:03:36,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 21:03:36,391 INFO L82 PathProgramCache]: Analyzing trace with hash -1545437633, now seen corresponding path program 1 times [2021-01-06 21:03:36,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 21:03:36,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387243125] [2021-01-06 21:03:36,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 21:03:36,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 21:03:36,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 21:03:36,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387243125] [2021-01-06 21:03:36,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 21:03:36,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 21:03:36,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587961063] [2021-01-06 21:03:36,534 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 21:03:36,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 21:03:36,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 21:03:36,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-01-06 21:03:36,535 INFO L87 Difference]: Start difference. First operand 2279 states and 3312 transitions. Second operand 4 states. [2021-01-06 21:03:38,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 21:03:38,610 INFO L93 Difference]: Finished difference Result 5497 states and 8048 transitions. [2021-01-06 21:03:38,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 21:03:38,612 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 72 [2021-01-06 21:03:38,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 21:03:38,617 INFO L225 Difference]: With dead ends: 5497 [2021-01-06 21:03:38,617 INFO L226 Difference]: Without dead ends: 3333 [2021-01-06 21:03:38,619 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-01-06 21:03:38,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3333 states. [2021-01-06 21:03:40,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3333 to 3307. [2021-01-06 21:03:40,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3307 states. [2021-01-06 21:03:40,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3307 states to 3307 states and 4784 transitions. [2021-01-06 21:03:40,389 INFO L78 Accepts]: Start accepts. Automaton has 3307 states and 4784 transitions. Word has length 72 [2021-01-06 21:03:40,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 21:03:40,389 INFO L481 AbstractCegarLoop]: Abstraction has 3307 states and 4784 transitions. [2021-01-06 21:03:40,389 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 21:03:40,389 INFO L276 IsEmpty]: Start isEmpty. Operand 3307 states and 4784 transitions. [2021-01-06 21:03:40,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-01-06 21:03:40,390 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 21:03:40,390 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 21:03:40,390 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-01-06 21:03:40,390 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 21:03:40,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 21:03:40,391 INFO L82 PathProgramCache]: Analyzing trace with hash -654506813, now seen corresponding path program 1 times [2021-01-06 21:03:40,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 21:03:40,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120456476] [2021-01-06 21:03:40,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 21:03:40,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 21:03:40,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 21:03:40,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120456476] [2021-01-06 21:03:40,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 21:03:40,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 21:03:40,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993190272] [2021-01-06 21:03:40,520 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 21:03:40,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 21:03:40,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 21:03:40,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-01-06 21:03:40,521 INFO L87 Difference]: Start difference. First operand 3307 states and 4784 transitions. Second operand 5 states. [2021-01-06 21:03:43,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 21:03:43,760 INFO L93 Difference]: Finished difference Result 5020 states and 7262 transitions. [2021-01-06 21:03:43,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 21:03:43,762 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 72 [2021-01-06 21:03:43,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 21:03:43,766 INFO L225 Difference]: With dead ends: 5020 [2021-01-06 21:03:43,767 INFO L226 Difference]: Without dead ends: 5018 [2021-01-06 21:03:43,767 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-01-06 21:03:43,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5018 states. [2021-01-06 21:03:45,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5018 to 3327. [2021-01-06 21:03:45,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3327 states. [2021-01-06 21:03:45,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3327 states to 3327 states and 4780 transitions. [2021-01-06 21:03:45,523 INFO L78 Accepts]: Start accepts. Automaton has 3327 states and 4780 transitions. Word has length 72 [2021-01-06 21:03:45,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 21:03:45,523 INFO L481 AbstractCegarLoop]: Abstraction has 3327 states and 4780 transitions. [2021-01-06 21:03:45,523 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 21:03:45,523 INFO L276 IsEmpty]: Start isEmpty. Operand 3327 states and 4780 transitions. [2021-01-06 21:03:45,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-01-06 21:03:45,523 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 21:03:45,524 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 21:03:45,524 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-01-06 21:03:45,524 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 21:03:45,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 21:03:45,524 INFO L82 PathProgramCache]: Analyzing trace with hash 1392166567, now seen corresponding path program 1 times [2021-01-06 21:03:45,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 21:03:45,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131335854] [2021-01-06 21:03:45,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 21:03:45,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 21:03:46,332 WARN L197 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2021-01-06 21:03:46,500 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 25 [2021-01-06 21:03:46,673 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 28 [2021-01-06 21:03:47,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 21:03:47,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131335854] [2021-01-06 21:03:47,124 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 21:03:47,124 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-01-06 21:03:47,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26113864] [2021-01-06 21:03:47,125 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 21:03:47,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 21:03:47,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 21:03:47,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-01-06 21:03:47,125 INFO L87 Difference]: Start difference. First operand 3327 states and 4780 transitions. Second operand 18 states. [2021-01-06 21:03:47,325 WARN L197 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2021-01-06 21:03:47,576 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2021-01-06 21:03:47,744 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2021-01-06 21:03:47,941 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 29 [2021-01-06 21:03:48,144 WARN L197 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 34 [2021-01-06 21:03:48,374 WARN L197 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2021-01-06 21:03:48,847 WARN L197 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2021-01-06 21:03:49,319 WARN L197 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 67 [2021-01-06 21:03:49,977 WARN L197 SmtUtils]: Spent 533.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 75 [2021-01-06 21:03:50,441 WARN L197 SmtUtils]: Spent 406.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 67 [2021-01-06 21:03:50,935 WARN L197 SmtUtils]: Spent 432.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 67 [2021-01-06 21:03:51,362 WARN L197 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2021-01-06 21:03:51,924 WARN L197 SmtUtils]: Spent 511.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 75 [2021-01-06 21:03:52,251 WARN L197 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2021-01-06 21:03:52,723 WARN L197 SmtUtils]: Spent 405.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2021-01-06 21:03:52,957 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-01-06 21:03:53,245 WARN L197 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2021-01-06 21:03:53,652 WARN L197 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 57 [2021-01-06 21:03:54,004 WARN L197 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 51 [2021-01-06 21:03:54,984 WARN L197 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-01-06 21:03:55,892 WARN L197 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 48 [2021-01-06 21:03:56,321 WARN L197 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 45 [2021-01-06 21:04:08,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 21:04:08,647 INFO L93 Difference]: Finished difference Result 21504 states and 31072 transitions. [2021-01-06 21:04:08,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-01-06 21:04:08,648 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 72 [2021-01-06 21:04:08,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 21:04:08,667 INFO L225 Difference]: With dead ends: 21504 [2021-01-06 21:04:08,667 INFO L226 Difference]: Without dead ends: 20157 [2021-01-06 21:04:08,672 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=379, Invalid=1343, Unknown=0, NotChecked=0, Total=1722 [2021-01-06 21:04:08,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20157 states. [2021-01-06 21:04:10,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20157 to 3332. [2021-01-06 21:04:10,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3332 states. [2021-01-06 21:04:10,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3332 states to 3332 states and 4786 transitions. [2021-01-06 21:04:10,740 INFO L78 Accepts]: Start accepts. Automaton has 3332 states and 4786 transitions. Word has length 72 [2021-01-06 21:04:10,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 21:04:10,740 INFO L481 AbstractCegarLoop]: Abstraction has 3332 states and 4786 transitions. [2021-01-06 21:04:10,740 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 21:04:10,740 INFO L276 IsEmpty]: Start isEmpty. Operand 3332 states and 4786 transitions. [2021-01-06 21:04:10,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-01-06 21:04:10,740 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 21:04:10,741 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 21:04:10,741 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-01-06 21:04:10,741 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 21:04:10,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 21:04:10,741 INFO L82 PathProgramCache]: Analyzing trace with hash -1519996877, now seen corresponding path program 1 times [2021-01-06 21:04:10,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 21:04:10,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25033546] [2021-01-06 21:04:10,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 21:04:10,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 21:04:11,235 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-01-06 21:04:11,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 21:04:11,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25033546] [2021-01-06 21:04:11,483 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 21:04:11,483 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-01-06 21:04:11,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840705557] [2021-01-06 21:04:11,483 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 21:04:11,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 21:04:11,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 21:04:11,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-01-06 21:04:11,485 INFO L87 Difference]: Start difference. First operand 3332 states and 4786 transitions. Second operand 12 states. [2021-01-06 21:04:11,696 WARN L197 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2021-01-06 21:04:11,891 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2021-01-06 21:04:12,075 WARN L197 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 26 [2021-01-06 21:04:12,354 WARN L197 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 29