/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.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 20:54:07,141 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 20:54:07,144 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 20:54:07,186 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 20:54:07,187 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 20:54:07,189 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 20:54:07,191 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 20:54:07,193 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 20:54:07,195 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 20:54:07,197 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 20:54:07,198 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 20:54:07,200 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 20:54:07,200 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 20:54:07,201 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 20:54:07,203 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 20:54:07,204 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 20:54:07,216 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 20:54:07,217 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 20:54:07,220 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 20:54:07,222 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 20:54:07,224 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 20:54:07,226 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 20:54:07,228 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 20:54:07,229 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 20:54:07,232 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-01-06 20:54:07,233 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-01-06 20:54:07,233 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-01-06 20:54:07,234 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-01-06 20:54:07,235 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-01-06 20:54:07,236 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-01-06 20:54:07,237 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 20:54:07,238 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 20:54:07,239 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 20:54:07,240 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 20:54:07,242 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 20:54:07,242 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 20:54:07,243 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 20:54:07,243 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 20:54:07,244 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 20:54:07,245 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 20:54:07,246 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 20:54:07,247 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 20:54:07,276 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 20:54:07,277 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 20:54:07,278 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 20:54:07,279 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 20:54:07,279 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 20:54:07,279 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 20:54:07,280 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 20:54:07,280 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 20:54:07,280 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 20:54:07,281 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 20:54:07,281 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 20:54:07,281 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 20:54:07,281 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 20:54:07,282 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 20:54:07,282 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 20:54:07,282 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 20:54:07,283 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 20:54:07,283 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 20:54:07,283 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 20:54:07,283 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 20:54:07,283 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 20:54:07,284 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 20:54:07,284 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 20:54:07,284 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 20:54:07,284 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 20:54:07,285 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 20:54:07,684 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 20:54:07,714 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 20:54:07,717 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 20:54:07,719 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 20:54:07,719 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 20:54:07,720 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2021-01-06 20:54:07,813 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/63cfad92c/b95396a63ec84242abcd54b8ae866967/FLAGd84c8877a [2021-01-06 20:54:08,435 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 20:54:08,436 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2021-01-06 20:54:08,447 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/63cfad92c/b95396a63ec84242abcd54b8ae866967/FLAGd84c8877a [2021-01-06 20:54:08,771 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/63cfad92c/b95396a63ec84242abcd54b8ae866967 [2021-01-06 20:54:08,775 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 20:54:08,779 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 20:54:08,783 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 20:54:08,783 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 20:54:08,787 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 20:54:08,788 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 08:54:08" (1/1) ... [2021-01-06 20:54:08,790 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@99ce89d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 08:54:08, skipping insertion in model container [2021-01-06 20:54:08,790 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 08:54:08" (1/1) ... [2021-01-06 20:54:08,798 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 20:54:08,850 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[~init__tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~__return_1406~0,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[~main__i2~0,] left hand side expression in assignment: lhs: VariableLHS[~node1__m1~0,] left hand side expression in assignment: lhs: VariableLHS[~r1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~node1__m1~0,] left hand side expression in assignment: lhs: VariableLHS[~p3_old~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~node2__m2~0,] left hand side expression in assignment: lhs: VariableLHS[~node2__m2~0,] left hand side expression in assignment: lhs: VariableLHS[~p1_old~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~node3__m3~0,] left hand side expression in assignment: lhs: VariableLHS[~node3__m3~0,] left hand side expression in assignment: lhs: VariableLHS[~p2_old~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~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[~check__tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~__return_1482~0,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,] [2021-01-06 20:54:09,057 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.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c[3663,3676] left hand side expression in assignment: lhs: VariableLHS[~main__i2~0,] left hand side expression in assignment: lhs: VariableLHS[~check__tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~check__tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~check__tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~check__tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~st3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~node3____CPAchecker_TMP_0~0,] left hand side expression in assignment: lhs: VariableLHS[~p3_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~node3____CPAchecker_TMP_0~0,] left hand side expression in assignment: lhs: VariableLHS[~st2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~node2____CPAchecker_TMP_0~0,] left hand side expression in assignment: lhs: VariableLHS[~p2_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~node2____CPAchecker_TMP_0~0,] left hand side expression in assignment: lhs: VariableLHS[~st1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~node1____CPAchecker_TMP_0~0,] left hand side expression in assignment: lhs: VariableLHS[~p1_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~node1____CPAchecker_TMP_0~0,] left hand side expression in assignment: lhs: VariableLHS[~__return_1537~0,GLOBAL] [2021-01-06 20:54:09,104 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 20:54:09,134 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[~init__tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~__return_1406~0,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[~main__i2~0,] left hand side expression in assignment: lhs: VariableLHS[~node1__m1~0,] left hand side expression in assignment: lhs: VariableLHS[~r1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~node1__m1~0,] left hand side expression in assignment: lhs: VariableLHS[~p3_old~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~node2__m2~0,] left hand side expression in assignment: lhs: VariableLHS[~node2__m2~0,] left hand side expression in assignment: lhs: VariableLHS[~p1_old~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~node3__m3~0,] left hand side expression in assignment: lhs: VariableLHS[~node3__m3~0,] left hand side expression in assignment: lhs: VariableLHS[~p2_old~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~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[~check__tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~__return_1482~0,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,] [2021-01-06 20:54:09,225 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.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c[3663,3676] left hand side expression in assignment: lhs: VariableLHS[~main__i2~0,] left hand side expression in assignment: lhs: VariableLHS[~check__tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~check__tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~check__tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~check__tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~st3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~node3____CPAchecker_TMP_0~0,] left hand side expression in assignment: lhs: VariableLHS[~p3_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~node3____CPAchecker_TMP_0~0,] left hand side expression in assignment: lhs: VariableLHS[~st2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~node2____CPAchecker_TMP_0~0,] left hand side expression in assignment: lhs: VariableLHS[~p2_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~node2____CPAchecker_TMP_0~0,] left hand side expression in assignment: lhs: VariableLHS[~st1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~node1____CPAchecker_TMP_0~0,] left hand side expression in assignment: lhs: VariableLHS[~p1_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~node1____CPAchecker_TMP_0~0,] left hand side expression in assignment: lhs: VariableLHS[~__return_1537~0,GLOBAL] [2021-01-06 20:54:09,255 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 20:54:09,280 INFO L208 MainTranslator]: Completed translation [2021-01-06 20:54:09,281 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 08:54:09 WrapperNode [2021-01-06 20:54:09,281 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 20:54:09,283 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 20:54:09,283 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 20:54:09,283 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 20:54:09,291 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 08:54:09" (1/1) ... [2021-01-06 20:54:09,302 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 08:54:09" (1/1) ... [2021-01-06 20:54:09,332 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 20:54:09,333 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 20:54:09,333 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 20:54:09,333 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 20:54:09,347 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 08:54:09" (1/1) ... [2021-01-06 20:54:09,347 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 08:54:09" (1/1) ... [2021-01-06 20:54:09,364 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 08:54:09" (1/1) ... [2021-01-06 20:54:09,364 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 08:54:09" (1/1) ... [2021-01-06 20:54:09,375 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 08:54:09" (1/1) ... [2021-01-06 20:54:09,387 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 08:54:09" (1/1) ... [2021-01-06 20:54:09,397 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 08:54:09" (1/1) ... [2021-01-06 20:54:09,404 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 20:54:09,405 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 20:54:09,408 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 20:54:09,408 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 20:54:09,409 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 08:54:09" (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 20:54:09,526 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 20:54:09,528 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 20:54:09,528 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 20:54:09,528 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 20:54:10,225 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 20:54:10,226 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-01-06 20:54:10,227 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 08:54:10 BoogieIcfgContainer [2021-01-06 20:54:10,228 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 20:54:10,229 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 20:54:10,229 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 20:54:10,233 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 20:54:10,233 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 08:54:08" (1/3) ... [2021-01-06 20:54:10,234 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35838ec6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 08:54:10, skipping insertion in model container [2021-01-06 20:54:10,234 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 08:54:09" (2/3) ... [2021-01-06 20:54:10,235 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35838ec6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 08:54:10, skipping insertion in model container [2021-01-06 20:54:10,235 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 08:54:10" (3/3) ... [2021-01-06 20:54:10,236 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2021-01-06 20:54:10,243 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 20:54:10,248 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 20:54:10,267 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 20:54:10,298 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 20:54:10,298 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 20:54:10,299 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 20:54:10,299 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 20:54:10,299 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 20:54:10,299 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 20:54:10,299 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 20:54:10,299 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 20:54:10,315 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states. [2021-01-06 20:54:10,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-01-06 20:54:10,323 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 20:54:10,324 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] [2021-01-06 20:54:10,324 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 20:54:10,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 20:54:10,330 INFO L82 PathProgramCache]: Analyzing trace with hash -1007825277, now seen corresponding path program 1 times [2021-01-06 20:54:10,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 20:54:10,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396925714] [2021-01-06 20:54:10,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 20:54:10,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 20:54:10,662 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 20:54:10,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396925714] [2021-01-06 20:54:10,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 20:54:10,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 20:54:10,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865440084] [2021-01-06 20:54:10,674 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 20:54:10,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 20:54:10,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 20:54:10,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 20:54:10,693 INFO L87 Difference]: Start difference. First operand 62 states. Second operand 3 states. [2021-01-06 20:54:10,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 20:54:10,798 INFO L93 Difference]: Finished difference Result 140 states and 224 transitions. [2021-01-06 20:54:10,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 20:54:10,802 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 36 [2021-01-06 20:54:10,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 20:54:10,831 INFO L225 Difference]: With dead ends: 140 [2021-01-06 20:54:10,831 INFO L226 Difference]: Without dead ends: 91 [2021-01-06 20:54:10,837 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 20:54:10,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-01-06 20:54:10,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 89. [2021-01-06 20:54:10,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2021-01-06 20:54:10,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 130 transitions. [2021-01-06 20:54:10,896 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 130 transitions. Word has length 36 [2021-01-06 20:54:10,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 20:54:10,897 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 130 transitions. [2021-01-06 20:54:10,897 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 20:54:10,897 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 130 transitions. [2021-01-06 20:54:10,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-01-06 20:54:10,899 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 20:54:10,899 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] [2021-01-06 20:54:10,900 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 20:54:10,900 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 20:54:10,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 20:54:10,901 INFO L82 PathProgramCache]: Analyzing trace with hash 1176817218, now seen corresponding path program 1 times [2021-01-06 20:54:10,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 20:54:10,902 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774613847] [2021-01-06 20:54:10,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 20:54:10,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 20:54:11,039 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 20:54:11,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774613847] [2021-01-06 20:54:11,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 20:54:11,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 20:54:11,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999486327] [2021-01-06 20:54:11,042 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 20:54:11,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 20:54:11,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 20:54:11,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 20:54:11,044 INFO L87 Difference]: Start difference. First operand 89 states and 130 transitions. Second operand 3 states. [2021-01-06 20:54:11,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 20:54:11,098 INFO L93 Difference]: Finished difference Result 213 states and 326 transitions. [2021-01-06 20:54:11,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 20:54:11,099 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 37 [2021-01-06 20:54:11,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 20:54:11,102 INFO L225 Difference]: With dead ends: 213 [2021-01-06 20:54:11,102 INFO L226 Difference]: Without dead ends: 143 [2021-01-06 20:54:11,104 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 20:54:11,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-01-06 20:54:11,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 141. [2021-01-06 20:54:11,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2021-01-06 20:54:11,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 212 transitions. [2021-01-06 20:54:11,151 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 212 transitions. Word has length 37 [2021-01-06 20:54:11,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 20:54:11,152 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 212 transitions. [2021-01-06 20:54:11,152 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 20:54:11,152 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 212 transitions. [2021-01-06 20:54:11,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-01-06 20:54:11,153 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 20:54:11,154 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] [2021-01-06 20:54:11,154 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-06 20:54:11,154 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 20:54:11,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 20:54:11,155 INFO L82 PathProgramCache]: Analyzing trace with hash 761408425, now seen corresponding path program 1 times [2021-01-06 20:54:11,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 20:54:11,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388214657] [2021-01-06 20:54:11,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 20:54:11,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 20:54:11,271 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 20:54:11,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388214657] [2021-01-06 20:54:11,272 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 20:54:11,272 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 20:54:11,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940853299] [2021-01-06 20:54:11,274 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 20:54:11,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 20:54:11,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 20:54:11,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 20:54:11,280 INFO L87 Difference]: Start difference. First operand 141 states and 212 transitions. Second operand 3 states. [2021-01-06 20:54:11,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 20:54:11,357 INFO L93 Difference]: Finished difference Result 353 states and 546 transitions. [2021-01-06 20:54:11,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 20:54:11,357 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 38 [2021-01-06 20:54:11,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 20:54:11,361 INFO L225 Difference]: With dead ends: 353 [2021-01-06 20:54:11,361 INFO L226 Difference]: Without dead ends: 231 [2021-01-06 20:54:11,362 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 20:54:11,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-01-06 20:54:11,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 229. [2021-01-06 20:54:11,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2021-01-06 20:54:11,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 348 transitions. [2021-01-06 20:54:11,415 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 348 transitions. Word has length 38 [2021-01-06 20:54:11,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 20:54:11,416 INFO L481 AbstractCegarLoop]: Abstraction has 229 states and 348 transitions. [2021-01-06 20:54:11,419 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 20:54:11,419 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 348 transitions. [2021-01-06 20:54:11,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-01-06 20:54:11,421 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 20:54:11,421 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] [2021-01-06 20:54:11,421 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-01-06 20:54:11,422 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 20:54:11,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 20:54:11,426 INFO L82 PathProgramCache]: Analyzing trace with hash 2014631486, now seen corresponding path program 1 times [2021-01-06 20:54:11,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 20:54:11,427 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166638233] [2021-01-06 20:54:11,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 20:54:11,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 20:54:11,593 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 20:54:11,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166638233] [2021-01-06 20:54:11,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 20:54:11,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 20:54:11,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118992540] [2021-01-06 20:54:11,595 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 20:54:11,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 20:54:11,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 20:54:11,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-01-06 20:54:11,597 INFO L87 Difference]: Start difference. First operand 229 states and 348 transitions. Second operand 5 states. [2021-01-06 20:54:11,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 20:54:11,799 INFO L93 Difference]: Finished difference Result 439 states and 677 transitions. [2021-01-06 20:54:11,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 20:54:11,801 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 39 [2021-01-06 20:54:11,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 20:54:11,806 INFO L225 Difference]: With dead ends: 439 [2021-01-06 20:54:11,806 INFO L226 Difference]: Without dead ends: 229 [2021-01-06 20:54:11,811 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 20:54:11,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-01-06 20:54:11,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 229. [2021-01-06 20:54:11,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2021-01-06 20:54:11,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 344 transitions. [2021-01-06 20:54:11,861 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 344 transitions. Word has length 39 [2021-01-06 20:54:11,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 20:54:11,861 INFO L481 AbstractCegarLoop]: Abstraction has 229 states and 344 transitions. [2021-01-06 20:54:11,862 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 20:54:11,862 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 344 transitions. [2021-01-06 20:54:11,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-01-06 20:54:11,863 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 20:54:11,863 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] [2021-01-06 20:54:11,863 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-01-06 20:54:11,864 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 20:54:11,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 20:54:11,864 INFO L82 PathProgramCache]: Analyzing trace with hash 172600953, now seen corresponding path program 1 times [2021-01-06 20:54:11,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 20:54:11,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418936320] [2021-01-06 20:54:11,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 20:54:11,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 20:54:11,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 20:54:11,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418936320] [2021-01-06 20:54:11,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 20:54:11,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 20:54:11,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975373064] [2021-01-06 20:54:11,983 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 20:54:11,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 20:54:11,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 20:54:11,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 20:54:11,984 INFO L87 Difference]: Start difference. First operand 229 states and 344 transitions. Second operand 5 states. [2021-01-06 20:54:12,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 20:54:12,148 INFO L93 Difference]: Finished difference Result 1069 states and 1644 transitions. [2021-01-06 20:54:12,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 20:54:12,149 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 39 [2021-01-06 20:54:12,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 20:54:12,154 INFO L225 Difference]: With dead ends: 1069 [2021-01-06 20:54:12,154 INFO L226 Difference]: Without dead ends: 859 [2021-01-06 20:54:12,155 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 20:54:12,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 859 states. [2021-01-06 20:54:12,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 859 to 437. [2021-01-06 20:54:12,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 437 states. [2021-01-06 20:54:12,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 652 transitions. [2021-01-06 20:54:12,200 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 652 transitions. Word has length 39 [2021-01-06 20:54:12,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 20:54:12,201 INFO L481 AbstractCegarLoop]: Abstraction has 437 states and 652 transitions. [2021-01-06 20:54:12,201 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 20:54:12,201 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 652 transitions. [2021-01-06 20:54:12,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-01-06 20:54:12,202 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 20:54:12,203 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] [2021-01-06 20:54:12,203 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-01-06 20:54:12,203 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 20:54:12,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 20:54:12,204 INFO L82 PathProgramCache]: Analyzing trace with hash 1738935381, now seen corresponding path program 1 times [2021-01-06 20:54:12,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 20:54:12,204 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672044954] [2021-01-06 20:54:12,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 20:54:12,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 20:54:12,331 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 20:54:12,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672044954] [2021-01-06 20:54:12,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 20:54:12,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 20:54:12,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038250250] [2021-01-06 20:54:12,338 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 20:54:12,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 20:54:12,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 20:54:12,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 20:54:12,339 INFO L87 Difference]: Start difference. First operand 437 states and 652 transitions. Second operand 3 states. [2021-01-06 20:54:12,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 20:54:12,437 INFO L93 Difference]: Finished difference Result 1055 states and 1584 transitions. [2021-01-06 20:54:12,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 20:54:12,437 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 41 [2021-01-06 20:54:12,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 20:54:12,444 INFO L225 Difference]: With dead ends: 1055 [2021-01-06 20:54:12,445 INFO L226 Difference]: Without dead ends: 637 [2021-01-06 20:54:12,446 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 20:54:12,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 637 states. [2021-01-06 20:54:12,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 637 to 635. [2021-01-06 20:54:12,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 635 states. [2021-01-06 20:54:12,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 938 transitions. [2021-01-06 20:54:12,526 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 938 transitions. Word has length 41 [2021-01-06 20:54:12,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 20:54:12,527 INFO L481 AbstractCegarLoop]: Abstraction has 635 states and 938 transitions. [2021-01-06 20:54:12,527 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 20:54:12,528 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 938 transitions. [2021-01-06 20:54:12,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-01-06 20:54:12,530 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 20:54:12,530 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] [2021-01-06 20:54:12,530 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-01-06 20:54:12,531 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 20:54:12,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 20:54:12,537 INFO L82 PathProgramCache]: Analyzing trace with hash 1759938036, now seen corresponding path program 1 times [2021-01-06 20:54:12,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 20:54:12,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473687052] [2021-01-06 20:54:12,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 20:54:12,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 20:54:12,696 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 20:54:12,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473687052] [2021-01-06 20:54:12,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 20:54:12,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 20:54:12,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255316706] [2021-01-06 20:54:12,698 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 20:54:12,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 20:54:12,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 20:54:12,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 20:54:12,699 INFO L87 Difference]: Start difference. First operand 635 states and 938 transitions. Second operand 5 states. [2021-01-06 20:54:12,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 20:54:12,881 INFO L93 Difference]: Finished difference Result 1767 states and 2648 transitions. [2021-01-06 20:54:12,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 20:54:12,882 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 41 [2021-01-06 20:54:12,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 20:54:12,890 INFO L225 Difference]: With dead ends: 1767 [2021-01-06 20:54:12,891 INFO L226 Difference]: Without dead ends: 1153 [2021-01-06 20:54:12,893 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 20:54:12,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1153 states. [2021-01-06 20:54:12,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1153 to 635. [2021-01-06 20:54:12,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 635 states. [2021-01-06 20:54:12,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 926 transitions. [2021-01-06 20:54:12,976 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 926 transitions. Word has length 41 [2021-01-06 20:54:12,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 20:54:12,976 INFO L481 AbstractCegarLoop]: Abstraction has 635 states and 926 transitions. [2021-01-06 20:54:12,976 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 20:54:12,977 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 926 transitions. [2021-01-06 20:54:12,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-01-06 20:54:12,983 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 20:54:12,983 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] [2021-01-06 20:54:12,983 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-01-06 20:54:12,983 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 20:54:12,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 20:54:12,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1278405158, now seen corresponding path program 1 times [2021-01-06 20:54:12,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 20:54:12,985 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761916530] [2021-01-06 20:54:12,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 20:54:13,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 20:54:13,101 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 20:54:13,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761916530] [2021-01-06 20:54:13,102 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 20:54:13,102 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 20:54:13,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129793208] [2021-01-06 20:54:13,103 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 20:54:13,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 20:54:13,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 20:54:13,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-01-06 20:54:13,104 INFO L87 Difference]: Start difference. First operand 635 states and 926 transitions. Second operand 5 states. [2021-01-06 20:54:13,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 20:54:13,288 INFO L93 Difference]: Finished difference Result 1143 states and 1658 transitions. [2021-01-06 20:54:13,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 20:54:13,289 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 42 [2021-01-06 20:54:13,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 20:54:13,296 INFO L225 Difference]: With dead ends: 1143 [2021-01-06 20:54:13,296 INFO L226 Difference]: Without dead ends: 1141 [2021-01-06 20:54:13,297 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-01-06 20:54:13,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1141 states. [2021-01-06 20:54:13,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1141 to 667. [2021-01-06 20:54:13,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 667 states. [2021-01-06 20:54:13,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 667 states to 667 states and 954 transitions. [2021-01-06 20:54:13,386 INFO L78 Accepts]: Start accepts. Automaton has 667 states and 954 transitions. Word has length 42 [2021-01-06 20:54:13,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 20:54:13,387 INFO L481 AbstractCegarLoop]: Abstraction has 667 states and 954 transitions. [2021-01-06 20:54:13,387 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 20:54:13,389 INFO L276 IsEmpty]: Start isEmpty. Operand 667 states and 954 transitions. [2021-01-06 20:54:13,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-01-06 20:54:13,392 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 20:54:13,392 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 20:54:13,393 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-01-06 20:54:13,393 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 20:54:13,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 20:54:13,393 INFO L82 PathProgramCache]: Analyzing trace with hash 1616122195, now seen corresponding path program 1 times [2021-01-06 20:54:13,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 20:54:13,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855293897] [2021-01-06 20:54:13,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 20:54:13,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 20:54:13,551 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-01-06 20:54:13,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855293897] [2021-01-06 20:54:13,558 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 20:54:13,558 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 20:54:13,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533212628] [2021-01-06 20:54:13,560 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 20:54:13,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 20:54:13,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 20:54:13,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 20:54:13,562 INFO L87 Difference]: Start difference. First operand 667 states and 954 transitions. Second operand 5 states. [2021-01-06 20:54:13,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 20:54:13,834 INFO L93 Difference]: Finished difference Result 2735 states and 3928 transitions. [2021-01-06 20:54:13,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 20:54:13,835 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 60 [2021-01-06 20:54:13,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 20:54:13,845 INFO L225 Difference]: With dead ends: 2735 [2021-01-06 20:54:13,845 INFO L226 Difference]: Without dead ends: 2089 [2021-01-06 20:54:13,847 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 20:54:13,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2089 states. [2021-01-06 20:54:14,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2089 to 1311. [2021-01-06 20:54:14,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1311 states. [2021-01-06 20:54:14,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1311 states to 1311 states and 1874 transitions. [2021-01-06 20:54:14,035 INFO L78 Accepts]: Start accepts. Automaton has 1311 states and 1874 transitions. Word has length 60 [2021-01-06 20:54:14,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 20:54:14,035 INFO L481 AbstractCegarLoop]: Abstraction has 1311 states and 1874 transitions. [2021-01-06 20:54:14,036 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 20:54:14,036 INFO L276 IsEmpty]: Start isEmpty. Operand 1311 states and 1874 transitions. [2021-01-06 20:54:14,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-01-06 20:54:14,037 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 20:54:14,037 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 20:54:14,037 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-01-06 20:54:14,037 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 20:54:14,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 20:54:14,038 INFO L82 PathProgramCache]: Analyzing trace with hash -1524898995, now seen corresponding path program 1 times [2021-01-06 20:54:14,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 20:54:14,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231216390] [2021-01-06 20:54:14,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 20:54:14,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 20:54:14,147 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 20:54:14,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231216390] [2021-01-06 20:54:14,148 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 20:54:14,148 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 20:54:14,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502041644] [2021-01-06 20:54:14,149 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 20:54:14,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 20:54:14,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 20:54:14,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 20:54:14,153 INFO L87 Difference]: Start difference. First operand 1311 states and 1874 transitions. Second operand 5 states. [2021-01-06 20:54:14,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 20:54:14,525 INFO L93 Difference]: Finished difference Result 3379 states and 4848 transitions. [2021-01-06 20:54:14,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 20:54:14,526 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 60 [2021-01-06 20:54:14,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 20:54:14,543 INFO L225 Difference]: With dead ends: 3379 [2021-01-06 20:54:14,543 INFO L226 Difference]: Without dead ends: 2733 [2021-01-06 20:54:14,546 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 20:54:14,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2733 states. [2021-01-06 20:54:14,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2733 to 2279. [2021-01-06 20:54:14,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2279 states. [2021-01-06 20:54:14,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2279 states to 2279 states and 3244 transitions. [2021-01-06 20:54:14,818 INFO L78 Accepts]: Start accepts. Automaton has 2279 states and 3244 transitions. Word has length 60 [2021-01-06 20:54:14,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 20:54:14,818 INFO L481 AbstractCegarLoop]: Abstraction has 2279 states and 3244 transitions. [2021-01-06 20:54:14,818 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 20:54:14,818 INFO L276 IsEmpty]: Start isEmpty. Operand 2279 states and 3244 transitions. [2021-01-06 20:54:14,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-01-06 20:54:14,820 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 20:54:14,820 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 20:54:14,820 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-01-06 20:54:14,820 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 20:54:14,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 20:54:14,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1912167623, now seen corresponding path program 1 times [2021-01-06 20:54:14,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 20:54:14,821 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132214420] [2021-01-06 20:54:14,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 20:54:14,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 20:54:14,930 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 20:54:14,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132214420] [2021-01-06 20:54:14,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 20:54:14,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 20:54:14,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913308825] [2021-01-06 20:54:14,932 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 20:54:14,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 20:54:14,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 20:54:14,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 20:54:14,935 INFO L87 Difference]: Start difference. First operand 2279 states and 3244 transitions. Second operand 5 states. [2021-01-06 20:54:15,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 20:54:15,354 INFO L93 Difference]: Finished difference Result 3827 states and 5492 transitions. [2021-01-06 20:54:15,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 20:54:15,355 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 60 [2021-01-06 20:54:15,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 20:54:15,371 INFO L225 Difference]: With dead ends: 3827 [2021-01-06 20:54:15,371 INFO L226 Difference]: Without dead ends: 3377 [2021-01-06 20:54:15,373 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 20:54:15,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3377 states. [2021-01-06 20:54:15,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3377 to 2727. [2021-01-06 20:54:15,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2727 states. [2021-01-06 20:54:15,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2727 states to 2727 states and 3892 transitions. [2021-01-06 20:54:15,692 INFO L78 Accepts]: Start accepts. Automaton has 2727 states and 3892 transitions. Word has length 60 [2021-01-06 20:54:15,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 20:54:15,692 INFO L481 AbstractCegarLoop]: Abstraction has 2727 states and 3892 transitions. [2021-01-06 20:54:15,692 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 20:54:15,692 INFO L276 IsEmpty]: Start isEmpty. Operand 2727 states and 3892 transitions. [2021-01-06 20:54:15,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-01-06 20:54:15,694 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 20:54:15,694 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 20:54:15,694 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-01-06 20:54:15,694 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 20:54:15,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 20:54:15,695 INFO L82 PathProgramCache]: Analyzing trace with hash -1791952020, now seen corresponding path program 1 times [2021-01-06 20:54:15,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 20:54:15,696 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341660444] [2021-01-06 20:54:15,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 20:54:15,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 20:54:15,793 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 20:54:15,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341660444] [2021-01-06 20:54:15,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8840338] [2021-01-06 20:54:15,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 20:54:15,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 20:54:15,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 20:54:15,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 20:54:16,055 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 20:54:16,056 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 20:54:16,056 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 6 [2021-01-06 20:54:16,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097741728] [2021-01-06 20:54:16,057 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 20:54:16,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 20:54:16,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 20:54:16,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 20:54:16,058 INFO L87 Difference]: Start difference. First operand 2727 states and 3892 transitions. Second operand 6 states. [2021-01-06 20:54:16,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 20:54:16,749 INFO L93 Difference]: Finished difference Result 6480 states and 9305 transitions. [2021-01-06 20:54:16,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 20:54:16,750 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 61 [2021-01-06 20:54:16,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 20:54:16,772 INFO L225 Difference]: With dead ends: 6480 [2021-01-06 20:54:16,772 INFO L226 Difference]: Without dead ends: 4462 [2021-01-06 20:54:16,777 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 20:54:16,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4462 states. [2021-01-06 20:54:17,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4462 to 4403. [2021-01-06 20:54:17,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4403 states. [2021-01-06 20:54:17,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4403 states to 4403 states and 6206 transitions. [2021-01-06 20:54:17,392 INFO L78 Accepts]: Start accepts. Automaton has 4403 states and 6206 transitions. Word has length 61 [2021-01-06 20:54:17,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 20:54:17,393 INFO L481 AbstractCegarLoop]: Abstraction has 4403 states and 6206 transitions. [2021-01-06 20:54:17,393 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 20:54:17,393 INFO L276 IsEmpty]: Start isEmpty. Operand 4403 states and 6206 transitions. [2021-01-06 20:54:17,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-01-06 20:54:17,395 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 20:54:17,395 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 20:54:17,609 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-01-06 20:54:17,610 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 20:54:17,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 20:54:17,611 INFO L82 PathProgramCache]: Analyzing trace with hash 1709414990, now seen corresponding path program 1 times [2021-01-06 20:54:17,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 20:54:17,612 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761958394] [2021-01-06 20:54:17,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 20:54:17,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 20:54:17,888 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 20:54:17,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761958394] [2021-01-06 20:54:17,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828092190] [2021-01-06 20:54:17,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 20:54:18,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 20:54:18,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 39 conjunts are in the unsatisfiable core [2021-01-06 20:54:18,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 20:54:18,515 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 20:54:18,801 WARN L197 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 42 [2021-01-06 20:54:19,102 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 43 [2021-01-06 20:54:19,451 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 20:54:19,451 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 20:54:19,451 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 16] total 23 [2021-01-06 20:54:19,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909029133] [2021-01-06 20:54:19,452 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-01-06 20:54:19,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 20:54:19,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-01-06 20:54:19,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2021-01-06 20:54:19,454 INFO L87 Difference]: Start difference. First operand 4403 states and 6206 transitions. Second operand 24 states. [2021-01-06 20:54:20,034 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-01-06 20:54:20,595 WARN L197 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 63 [2021-01-06 20:54:20,740 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-01-06 20:54:20,989 WARN L197 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2021-01-06 20:54:21,394 WARN L197 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 91 [2021-01-06 20:54:21,806 WARN L197 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 91 [2021-01-06 20:54:22,105 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-01-06 20:54:22,692 WARN L197 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 85 [2021-01-06 20:54:23,005 WARN L197 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 85 [2021-01-06 20:54:23,574 WARN L197 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2021-01-06 20:54:23,903 WARN L197 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2021-01-06 20:54:24,810 WARN L197 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 89 [2021-01-06 20:54:25,187 WARN L197 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 89 [2021-01-06 20:54:25,680 WARN L197 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 76 [2021-01-06 20:54:26,048 WARN L197 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 76 [2021-01-06 20:54:26,388 WARN L197 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 70 [2021-01-06 20:54:26,776 WARN L197 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 92 [2021-01-06 20:54:27,099 WARN L197 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 70 [2021-01-06 20:54:27,497 WARN L197 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 92 [2021-01-06 20:54:28,056 WARN L197 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 93 [2021-01-06 20:54:28,377 WARN L197 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 79 [2021-01-06 20:54:28,838 WARN L197 SmtUtils]: Spent 388.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 93 [2021-01-06 20:54:29,193 WARN L197 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 79 [2021-01-06 20:54:29,408 WARN L197 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 50 [2021-01-06 20:54:29,788 WARN L197 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 64 [2021-01-06 20:54:30,358 WARN L197 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 80 [2021-01-06 20:54:30,774 WARN L197 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 93 [2021-01-06 20:54:31,147 WARN L197 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 80 [2021-01-06 20:54:31,358 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2021-01-06 20:54:31,636 WARN L197 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2021-01-06 20:54:31,820 WARN L197 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2021-01-06 20:54:32,165 WARN L197 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 66 [2021-01-06 20:54:32,306 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-01-06 20:54:32,691 WARN L197 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 80 [2021-01-06 20:54:33,098 WARN L197 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 92 [2021-01-06 20:54:33,305 WARN L197 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2021-01-06 20:54:33,599 WARN L197 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 69 [2021-01-06 20:54:33,921 WARN L197 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2021-01-06 20:54:34,297 WARN L197 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 94 [2021-01-06 20:54:35,160 WARN L197 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 89 [2021-01-06 20:54:35,838 WARN L197 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 57 [2021-01-06 20:54:36,202 WARN L197 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2021-01-06 20:54:36,373 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2021-01-06 20:54:36,697 WARN L197 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 60 [2021-01-06 20:54:36,884 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2021-01-06 20:54:37,467 WARN L197 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 72 [2021-01-06 20:54:37,804 WARN L197 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 72 [2021-01-06 20:54:38,246 WARN L197 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 83 [2021-01-06 20:54:39,475 WARN L197 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 53 [2021-01-06 20:54:39,729 WARN L197 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 53 [2021-01-06 20:54:40,869 WARN L197 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 87 [2021-01-06 20:54:41,423 WARN L197 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 61 [2021-01-06 20:54:42,041 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2021-01-06 20:54:42,354 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2021-01-06 20:54:42,790 WARN L197 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2021-01-06 20:54:43,221 WARN L197 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 90 [2021-01-06 20:54:43,620 WARN L197 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 56 [2021-01-06 20:54:43,904 WARN L197 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 56 [2021-01-06 20:54:44,394 WARN L197 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 91 [2021-01-06 20:54:45,351 WARN L197 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 89 [2021-01-06 20:54:46,587 WARN L197 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2021-01-06 20:54:46,989 WARN L197 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 83 [2021-01-06 20:54:48,412 WARN L197 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 87 [2021-01-06 20:54:49,368 WARN L197 SmtUtils]: Spent 420.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 90 [2021-01-06 20:54:50,065 WARN L197 SmtUtils]: Spent 420.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 91 [2021-01-06 20:54:50,782 WARN L197 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 91 [2021-01-06 20:54:54,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 20:54:54,024 INFO L93 Difference]: Finished difference Result 58241 states and 80402 transitions. [2021-01-06 20:54:54,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2021-01-06 20:54:54,025 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 62 [2021-01-06 20:54:54,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 20:54:54,262 INFO L225 Difference]: With dead ends: 58241 [2021-01-06 20:54:54,262 INFO L226 Difference]: Without dead ends: 53859 [2021-01-06 20:54:54,302 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6908 ImplicationChecksByTransitivity, 23.7s TimeCoverageRelationStatistics Valid=3258, Invalid=14832, Unknown=0, NotChecked=0, Total=18090 [2021-01-06 20:54:54,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53859 states. [2021-01-06 20:54:57,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53859 to 9355. [2021-01-06 20:54:57,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9355 states. [2021-01-06 20:54:57,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9355 states to 9355 states and 13032 transitions. [2021-01-06 20:54:57,232 INFO L78 Accepts]: Start accepts. Automaton has 9355 states and 13032 transitions. Word has length 62 [2021-01-06 20:54:57,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 20:54:57,232 INFO L481 AbstractCegarLoop]: Abstraction has 9355 states and 13032 transitions. [2021-01-06 20:54:57,232 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2021-01-06 20:54:57,232 INFO L276 IsEmpty]: Start isEmpty. Operand 9355 states and 13032 transitions. [2021-01-06 20:54:57,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-01-06 20:54:57,234 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 20:54:57,234 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 20:54:57,435 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-01-06 20:54:57,436 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 20:54:57,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 20:54:57,438 INFO L82 PathProgramCache]: Analyzing trace with hash 653717303, now seen corresponding path program 1 times [2021-01-06 20:54:57,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 20:54:57,439 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663683326] [2021-01-06 20:54:57,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 20:54:57,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 20:54:57,710 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 20:54:57,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663683326] [2021-01-06 20:54:57,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153898120] [2021-01-06 20:54:57,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 20:54:57,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 20:54:57,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 20:54:57,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 20:54:58,076 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 20:54:58,408 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 20:54:58,408 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 20:54:58,408 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-01-06 20:54:58,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340160915] [2021-01-06 20:54:58,410 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 20:54:58,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 20:54:58,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 20:54:58,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-01-06 20:54:58,411 INFO L87 Difference]: Start difference. First operand 9355 states and 13032 transitions. Second operand 17 states. [2021-01-06 20:54:59,527 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2021-01-06 20:55:14,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 20:55:14,003 INFO L93 Difference]: Finished difference Result 68149 states and 93592 transitions. [2021-01-06 20:55:14,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-01-06 20:55:14,004 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 62 [2021-01-06 20:55:14,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 20:55:14,194 INFO L225 Difference]: With dead ends: 68149 [2021-01-06 20:55:14,195 INFO L226 Difference]: Without dead ends: 58815 [2021-01-06 20:55:14,241 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 837 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=749, Invalid=2331, Unknown=0, NotChecked=0, Total=3080 [2021-01-06 20:55:14,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58815 states. [2021-01-06 20:55:19,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58815 to 20943. [2021-01-06 20:55:19,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20943 states. [2021-01-06 20:55:19,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20943 states to 20943 states and 28654 transitions. [2021-01-06 20:55:19,719 INFO L78 Accepts]: Start accepts. Automaton has 20943 states and 28654 transitions. Word has length 62 [2021-01-06 20:55:19,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 20:55:19,719 INFO L481 AbstractCegarLoop]: Abstraction has 20943 states and 28654 transitions. [2021-01-06 20:55:19,719 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 20:55:19,720 INFO L276 IsEmpty]: Start isEmpty. Operand 20943 states and 28654 transitions. [2021-01-06 20:55:19,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-01-06 20:55:19,722 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 20:55:19,722 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 20:55:19,932 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-06 20:55:19,933 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 20:55:19,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 20:55:19,935 INFO L82 PathProgramCache]: Analyzing trace with hash 1807663409, now seen corresponding path program 1 times [2021-01-06 20:55:19,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 20:55:19,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52789483] [2021-01-06 20:55:19,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 20:55:19,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 20:55:20,201 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 20:55:20,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52789483] [2021-01-06 20:55:20,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928103809] [2021-01-06 20:55:20,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 20:55:20,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 20:55:20,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-06 20:55:20,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 20:55:20,559 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 20:55:20,859 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 20:55:20,859 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 20:55:20,860 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-01-06 20:55:20,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047196601] [2021-01-06 20:55:20,860 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 20:55:20,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 20:55:20,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 20:55:20,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-01-06 20:55:20,862 INFO L87 Difference]: Start difference. First operand 20943 states and 28654 transitions. Second operand 17 states. [2021-01-06 20:55:49,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 20:55:49,249 INFO L93 Difference]: Finished difference Result 135652 states and 182751 transitions. [2021-01-06 20:55:49,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-01-06 20:55:49,250 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 62 [2021-01-06 20:55:49,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 20:55:49,810 INFO L225 Difference]: With dead ends: 135652 [2021-01-06 20:55:49,811 INFO L226 Difference]: Without dead ends: 114730 [2021-01-06 20:55:49,922 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 652 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=667, Invalid=1985, Unknown=0, NotChecked=0, Total=2652 [2021-01-06 20:55:50,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114730 states. [2021-01-06 20:56:02,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114730 to 52080. [2021-01-06 20:56:02,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52080 states. [2021-01-06 20:56:02,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52080 states to 52080 states and 70921 transitions. [2021-01-06 20:56:02,974 INFO L78 Accepts]: Start accepts. Automaton has 52080 states and 70921 transitions. Word has length 62 [2021-01-06 20:56:02,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 20:56:02,974 INFO L481 AbstractCegarLoop]: Abstraction has 52080 states and 70921 transitions. [2021-01-06 20:56:02,975 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 20:56:02,975 INFO L276 IsEmpty]: Start isEmpty. Operand 52080 states and 70921 transitions. [2021-01-06 20:56:02,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-06 20:56:02,977 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 20:56:02,978 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 20:56:03,178 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 20:56:03,179 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 20:56:03,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 20:56:03,180 INFO L82 PathProgramCache]: Analyzing trace with hash 1286750416, now seen corresponding path program 1 times [2021-01-06 20:56:03,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 20:56:03,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022897475] [2021-01-06 20:56:03,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 20:56:03,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 20:56:03,214 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-01-06 20:56:03,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022897475] [2021-01-06 20:56:03,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 20:56:03,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 20:56:03,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380304590] [2021-01-06 20:56:03,216 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 20:56:03,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 20:56:03,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 20:56:03,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 20:56:03,217 INFO L87 Difference]: Start difference. First operand 52080 states and 70921 transitions. Second operand 3 states. [2021-01-06 20:56:12,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 20:56:12,181 INFO L93 Difference]: Finished difference Result 94910 states and 129570 transitions. [2021-01-06 20:56:12,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 20:56:12,182 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 63 [2021-01-06 20:56:12,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 20:56:12,235 INFO L225 Difference]: With dead ends: 94910 [2021-01-06 20:56:12,236 INFO L226 Difference]: Without dead ends: 42851 [2021-01-06 20:56:12,281 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 20:56:12,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42851 states. [2021-01-06 20:56:21,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42851 to 42851. [2021-01-06 20:56:21,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42851 states. [2021-01-06 20:56:21,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42851 states to 42851 states and 57680 transitions. [2021-01-06 20:56:21,089 INFO L78 Accepts]: Start accepts. Automaton has 42851 states and 57680 transitions. Word has length 63 [2021-01-06 20:56:21,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 20:56:21,089 INFO L481 AbstractCegarLoop]: Abstraction has 42851 states and 57680 transitions. [2021-01-06 20:56:21,089 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 20:56:21,090 INFO L276 IsEmpty]: Start isEmpty. Operand 42851 states and 57680 transitions. [2021-01-06 20:56:21,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-06 20:56:21,092 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 20:56:21,092 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 20:56:21,092 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-01-06 20:56:21,092 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 20:56:21,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 20:56:21,093 INFO L82 PathProgramCache]: Analyzing trace with hash 1825583548, now seen corresponding path program 1 times [2021-01-06 20:56:21,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 20:56:21,093 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548749228] [2021-01-06 20:56:21,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 20:56:21,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 20:56:21,135 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 20:56:21,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548749228] [2021-01-06 20:56:21,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 20:56:21,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 20:56:21,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105814252] [2021-01-06 20:56:21,137 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 20:56:21,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 20:56:21,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 20:56:21,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 20:56:21,138 INFO L87 Difference]: Start difference. First operand 42851 states and 57680 transitions. Second operand 3 states. [2021-01-06 20:56:26,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 20:56:26,476 INFO L93 Difference]: Finished difference Result 68494 states and 92602 transitions. [2021-01-06 20:56:26,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 20:56:26,477 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 63 [2021-01-06 20:56:26,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 20:56:26,507 INFO L225 Difference]: With dead ends: 68494 [2021-01-06 20:56:26,507 INFO L226 Difference]: Without dead ends: 25664 [2021-01-06 20:56:26,532 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 20:56:26,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25664 states. [2021-01-06 20:56:31,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25664 to 24542. [2021-01-06 20:56:31,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24542 states. [2021-01-06 20:56:31,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24542 states to 24542 states and 32973 transitions. [2021-01-06 20:56:31,770 INFO L78 Accepts]: Start accepts. Automaton has 24542 states and 32973 transitions. Word has length 63 [2021-01-06 20:56:31,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 20:56:31,770 INFO L481 AbstractCegarLoop]: Abstraction has 24542 states and 32973 transitions. [2021-01-06 20:56:31,770 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 20:56:31,770 INFO L276 IsEmpty]: Start isEmpty. Operand 24542 states and 32973 transitions. [2021-01-06 20:56:31,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-06 20:56:31,772 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 20:56:31,772 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 20:56:31,772 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-01-06 20:56:31,773 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 20:56:31,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 20:56:31,773 INFO L82 PathProgramCache]: Analyzing trace with hash 392958652, now seen corresponding path program 1 times [2021-01-06 20:56:31,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 20:56:31,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828721149] [2021-01-06 20:56:31,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 20:56:31,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 20:56:32,864 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 20:56:32,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828721149] [2021-01-06 20:56:32,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989600116] [2021-01-06 20:56:32,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 20:56:32,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 20:56:32,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 23 conjunts are in the unsatisfiable core [2021-01-06 20:56:32,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 20:56:33,614 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 20:56:33,959 WARN L197 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 26 [2021-01-06 20:56:34,608 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 20:56:34,608 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 20:56:34,608 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 13] total 34 [2021-01-06 20:56:34,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992438479] [2021-01-06 20:56:34,609 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-01-06 20:56:34,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 20:56:34,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-01-06 20:56:34,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=1040, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 20:56:34,611 INFO L87 Difference]: Start difference. First operand 24542 states and 32973 transitions. Second operand 34 states. [2021-01-06 20:56:34,993 WARN L197 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 81 [2021-01-06 20:56:35,877 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 31 [2021-01-06 20:56:36,065 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 33 [2021-01-06 20:56:36,417 WARN L197 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2021-01-06 20:56:36,784 WARN L197 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 70 [2021-01-06 20:56:37,256 WARN L197 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 78 [2021-01-06 20:56:37,772 WARN L197 SmtUtils]: Spent 406.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 88 [2021-01-06 20:56:38,462 WARN L197 SmtUtils]: Spent 534.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 103 [2021-01-06 20:56:39,210 WARN L197 SmtUtils]: Spent 621.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 111 [2021-01-06 20:56:39,619 WARN L197 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 74 [2021-01-06 20:56:39,951 WARN L197 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 61 [2021-01-06 20:56:40,387 WARN L197 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 74 [2021-01-06 20:56:40,753 WARN L197 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 60 [2021-01-06 20:56:41,075 WARN L197 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2021-01-06 20:56:41,463 WARN L197 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2021-01-06 20:56:41,807 WARN L197 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 61 [2021-01-06 20:56:42,168 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2021-01-06 20:56:42,397 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2021-01-06 20:56:42,627 WARN L197 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 45 [2021-01-06 20:56:43,105 WARN L197 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2021-01-06 20:56:43,348 WARN L197 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2021-01-06 20:56:44,442 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2021-01-06 20:56:44,957 WARN L197 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2021-01-06 20:56:46,044 WARN L197 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 43 [2021-01-06 20:56:46,795 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-01-06 20:56:47,476 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 39 [2021-01-06 20:56:47,848 WARN L197 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 45 [2021-01-06 20:56:48,241 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2021-01-06 20:56:48,724 WARN L197 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2021-01-06 20:56:49,204 WARN L197 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2021-01-06 20:56:49,794 WARN L197 SmtUtils]: Spent 454.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 78 [2021-01-06 20:56:50,071 WARN L197 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2021-01-06 20:56:50,341 WARN L197 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 39 [2021-01-06 20:56:50,778 WARN L197 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2021-01-06 20:56:52,451 WARN L197 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 39 [2021-01-06 20:56:52,858 WARN L197 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2021-01-06 20:56:54,559 WARN L197 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2021-01-06 20:56:55,062 WARN L197 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 39 [2021-01-06 20:56:55,373 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-01-06 20:56:55,828 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2021-01-06 20:56:57,134 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 25 [2021-01-06 20:56:59,052 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2021-01-06 20:57:00,445 WARN L197 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2021-01-06 20:57:01,040 WARN L197 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2021-01-06 20:57:05,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 20:57:05,850 INFO L93 Difference]: Finished difference Result 56959 states and 76734 transitions. [2021-01-06 20:57:05,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-01-06 20:57:05,860 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 63 [2021-01-06 20:57:05,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 20:57:05,923 INFO L225 Difference]: With dead ends: 56959 [2021-01-06 20:57:05,923 INFO L226 Difference]: Without dead ends: 46891 [2021-01-06 20:57:05,941 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2133 ImplicationChecksByTransitivity, 16.4s TimeCoverageRelationStatistics Valid=1667, Invalid=7453, Unknown=0, NotChecked=0, Total=9120 [2021-01-06 20:57:05,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46891 states. [2021-01-06 20:57:12,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46891 to 24836. [2021-01-06 20:57:12,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24836 states. [2021-01-06 20:57:12,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24836 states to 24836 states and 33414 transitions. [2021-01-06 20:57:12,326 INFO L78 Accepts]: Start accepts. Automaton has 24836 states and 33414 transitions. Word has length 63 [2021-01-06 20:57:12,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 20:57:12,326 INFO L481 AbstractCegarLoop]: Abstraction has 24836 states and 33414 transitions. [2021-01-06 20:57:12,326 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2021-01-06 20:57:12,327 INFO L276 IsEmpty]: Start isEmpty. Operand 24836 states and 33414 transitions. [2021-01-06 20:57:12,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-06 20:57:12,329 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 20:57:12,329 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 20:57:12,529 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-01-06 20:57:12,530 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 20:57:12,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 20:57:12,531 INFO L82 PathProgramCache]: Analyzing trace with hash -196942823, now seen corresponding path program 1 times [2021-01-06 20:57:12,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 20:57:12,531 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423890594] [2021-01-06 20:57:12,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 20:57:12,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 20:57:12,588 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 20:57:12,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423890594] [2021-01-06 20:57:12,589 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 20:57:12,589 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 20:57:12,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356973839] [2021-01-06 20:57:12,591 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 20:57:12,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 20:57:12,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 20:57:12,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 20:57:12,592 INFO L87 Difference]: Start difference. First operand 24836 states and 33414 transitions. Second operand 3 states. [2021-01-06 20:57:16,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 20:57:16,552 INFO L93 Difference]: Finished difference Result 37014 states and 50040 transitions. [2021-01-06 20:57:16,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 20:57:16,554 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 63 [2021-01-06 20:57:16,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 20:57:16,570 INFO L225 Difference]: With dead ends: 37014 [2021-01-06 20:57:16,571 INFO L226 Difference]: Without dead ends: 14336 [2021-01-06 20:57:16,582 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 20:57:16,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14336 states. [2021-01-06 20:57:19,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14336 to 14334. [2021-01-06 20:57:19,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14334 states. [2021-01-06 20:57:19,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14334 states to 14334 states and 18872 transitions. [2021-01-06 20:57:19,941 INFO L78 Accepts]: Start accepts. Automaton has 14334 states and 18872 transitions. Word has length 63 [2021-01-06 20:57:19,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 20:57:19,941 INFO L481 AbstractCegarLoop]: Abstraction has 14334 states and 18872 transitions. [2021-01-06 20:57:19,941 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 20:57:19,941 INFO L276 IsEmpty]: Start isEmpty. Operand 14334 states and 18872 transitions. [2021-01-06 20:57:19,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-06 20:57:19,943 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 20:57:19,943 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 20:57:19,943 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-01-06 20:57:19,943 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 20:57:19,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 20:57:19,944 INFO L82 PathProgramCache]: Analyzing trace with hash -1628783719, now seen corresponding path program 1 times [2021-01-06 20:57:19,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 20:57:19,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280998556] [2021-01-06 20:57:19,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 20:57:19,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 20:57:21,685 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 20:57:21,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280998556] [2021-01-06 20:57:21,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229054568] [2021-01-06 20:57:21,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 20:57:21,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 20:57:21,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 33 conjunts are in the unsatisfiable core [2021-01-06 20:57:21,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 20:57:23,425 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2021-01-06 20:57:24,926 WARN L197 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 168 DAG size of output: 60 [2021-01-06 20:57:25,216 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-01-06 20:57:25,859 WARN L197 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2021-01-06 20:57:25,912 INFO L639 QuantifierPusher]: Distributing 4 conjuncts over 2 disjuncts [2021-01-06 20:57:26,484 WARN L197 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 61 [2021-01-06 20:57:26,590 INFO L639 QuantifierPusher]: Distributing 4 conjuncts over 2 disjuncts [2021-01-06 20:57:27,075 WARN L197 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 61 [2021-01-06 20:57:27,101 INFO L639 QuantifierPusher]: Distributing 4 conjuncts over 2 disjuncts [2021-01-06 20:57:27,120 INFO L639 QuantifierPusher]: Distributing 4 conjuncts over 4 disjuncts [2021-01-06 20:57:27,126 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: variable got div captured [2021-01-06 20:57:27,126 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 20:57:27,126 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2021-01-06 20:57:27,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951806278] [2021-01-06 20:57:27,127 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-06 20:57:27,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 20:57:27,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-06 20:57:27,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1347, Unknown=0, NotChecked=0, Total=1482 [2021-01-06 20:57:27,129 INFO L87 Difference]: Start difference. First operand 14334 states and 18872 transitions. Second operand 23 states. [2021-01-06 20:57:27,601 WARN L197 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 96 [2021-01-06 20:57:28,432 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2021-01-06 20:57:28,787 WARN L197 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2021-01-06 20:57:29,258 WARN L197 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 68 [2021-01-06 20:57:29,771 WARN L197 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 81 [2021-01-06 20:57:30,413 WARN L197 SmtUtils]: Spent 448.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 94 [2021-01-06 20:57:31,186 WARN L197 SmtUtils]: Spent 625.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 105 [2021-01-06 20:57:31,600 WARN L197 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2021-01-06 20:57:32,037 WARN L197 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2021-01-06 20:57:32,575 WARN L197 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2021-01-06 20:57:32,959 WARN L197 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2021-01-06 20:57:33,460 WARN L197 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2021-01-06 20:57:40,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 20:57:40,494 INFO L93 Difference]: Finished difference Result 17028 states and 22377 transitions. [2021-01-06 20:57:40,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-06 20:57:40,496 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 63 [2021-01-06 20:57:40,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 20:57:40,515 INFO L225 Difference]: With dead ends: 17028 [2021-01-06 20:57:40,515 INFO L226 Difference]: Without dead ends: 15642 [2021-01-06 20:57:40,522 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=406, Invalid=2900, Unknown=0, NotChecked=0, Total=3306 [2021-01-06 20:57:40,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15642 states. [2021-01-06 20:57:44,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15642 to 14387. [2021-01-06 20:57:44,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14387 states. [2021-01-06 20:57:44,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14387 states to 14387 states and 18954 transitions. [2021-01-06 20:57:44,214 INFO L78 Accepts]: Start accepts. Automaton has 14387 states and 18954 transitions. Word has length 63 [2021-01-06 20:57:44,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 20:57:44,215 INFO L481 AbstractCegarLoop]: Abstraction has 14387 states and 18954 transitions. [2021-01-06 20:57:44,215 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2021-01-06 20:57:44,215 INFO L276 IsEmpty]: Start isEmpty. Operand 14387 states and 18954 transitions. [2021-01-06 20:57:44,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-06 20:57:44,217 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 20:57:44,217 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 20:57:44,418 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 20:57:44,419 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 20:57:44,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 20:57:44,420 INFO L82 PathProgramCache]: Analyzing trace with hash -145976969, now seen corresponding path program 1 times [2021-01-06 20:57:44,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 20:57:44,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560390266] [2021-01-06 20:57:44,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 20:57:44,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 20:57:44,461 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-01-06 20:57:44,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560390266] [2021-01-06 20:57:44,462 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 20:57:44,462 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 20:57:44,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510717235] [2021-01-06 20:57:44,462 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 20:57:44,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 20:57:44,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 20:57:44,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 20:57:44,463 INFO L87 Difference]: Start difference. First operand 14387 states and 18954 transitions. Second operand 3 states. [2021-01-06 20:57:47,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 20:57:47,091 INFO L93 Difference]: Finished difference Result 23539 states and 31091 transitions. [2021-01-06 20:57:47,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 20:57:47,093 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 63 [2021-01-06 20:57:47,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 20:57:47,106 INFO L225 Difference]: With dead ends: 23539 [2021-01-06 20:57:47,106 INFO L226 Difference]: Without dead ends: 9241 [2021-01-06 20:57:47,117 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 20:57:47,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9241 states. [2021-01-06 20:57:49,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9241 to 9241. [2021-01-06 20:57:49,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9241 states. [2021-01-06 20:57:49,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9241 states to 9241 states and 12074 transitions. [2021-01-06 20:57:49,414 INFO L78 Accepts]: Start accepts. Automaton has 9241 states and 12074 transitions. Word has length 63 [2021-01-06 20:57:49,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 20:57:49,415 INFO L481 AbstractCegarLoop]: Abstraction has 9241 states and 12074 transitions. [2021-01-06 20:57:49,415 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 20:57:49,415 INFO L276 IsEmpty]: Start isEmpty. Operand 9241 states and 12074 transitions. [2021-01-06 20:57:49,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-01-06 20:57:49,416 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 20:57:49,416 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 20:57:49,416 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-01-06 20:57:49,416 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 20:57:49,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 20:57:49,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1441254617, now seen corresponding path program 1 times [2021-01-06 20:57:49,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 20:57:49,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017002156] [2021-01-06 20:57:49,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 20:57:49,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 20:57:50,812 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 20:57:50,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017002156] [2021-01-06 20:57:50,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251093700] [2021-01-06 20:57:50,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 20:57:50,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 20:57:50,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 20 conjunts are in the unsatisfiable core [2021-01-06 20:57:50,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 20:57:51,860 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 20:57:52,183 WARN L197 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 26 [2021-01-06 20:57:52,931 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 20:57:52,932 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 20:57:52,932 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 13] total 33 [2021-01-06 20:57:52,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939671329] [2021-01-06 20:57:52,932 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-01-06 20:57:52,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 20:57:52,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-01-06 20:57:52,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=974, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 20:57:52,934 INFO L87 Difference]: Start difference. First operand 9241 states and 12074 transitions. Second operand 33 states. [2021-01-06 20:57:53,390 WARN L197 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 66 [2021-01-06 20:57:54,282 WARN L197 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 17 [2021-01-06 20:57:54,479 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 21 [2021-01-06 20:57:54,803 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 23 [2021-01-06 20:57:55,153 WARN L197 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 31 [2021-01-06 20:57:55,470 WARN L197 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 43 [2021-01-06 20:57:55,982 WARN L197 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2021-01-06 20:57:56,752 WARN L197 SmtUtils]: Spent 650.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 79 [2021-01-06 20:57:57,658 WARN L197 SmtUtils]: Spent 712.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 89 [2021-01-06 20:57:58,536 WARN L197 SmtUtils]: Spent 741.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 95 [2021-01-06 20:57:59,007 WARN L197 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 64 [2021-01-06 20:57:59,444 WARN L197 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2021-01-06 20:57:59,977 WARN L197 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 64 [2021-01-06 20:58:00,533 WARN L197 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 60 [2021-01-06 20:58:01,023 WARN L197 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 49 [2021-01-06 20:58:01,502 WARN L197 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 56 [2021-01-06 20:58:02,042 WARN L197 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 23 [2021-01-06 20:58:02,373 WARN L197 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2021-01-06 20:58:03,180 WARN L197 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2021-01-06 20:58:03,554 WARN L197 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 49 [2021-01-06 20:58:04,048 WARN L197 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2021-01-06 20:58:04,795 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2021-01-06 20:58:05,229 WARN L197 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2021-01-06 20:58:05,589 WARN L197 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 41 [2021-01-06 20:58:06,117 WARN L197 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2021-01-06 20:58:06,506 WARN L197 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 43 [2021-01-06 20:58:07,611 WARN L197 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2021-01-06 20:58:07,999 WARN L197 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 36 [2021-01-06 20:58:08,397 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 22 [2021-01-06 20:58:08,739 WARN L197 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 28 [2021-01-06 20:58:09,072 WARN L197 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2021-01-06 20:58:09,477 WARN L197 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 40 [2021-01-06 20:58:10,612 WARN L197 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 50