/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-3af5e1f [2020-09-04 13:59:59,072 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 13:59:59,077 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 13:59:59,119 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 13:59:59,120 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 13:59:59,128 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 13:59:59,131 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 13:59:59,135 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 13:59:59,138 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 13:59:59,141 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 13:59:59,142 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 13:59:59,143 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 13:59:59,143 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 13:59:59,146 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 13:59:59,148 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 13:59:59,150 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 13:59:59,152 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 13:59:59,153 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 13:59:59,156 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 13:59:59,164 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 13:59:59,167 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 13:59:59,168 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 13:59:59,169 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 13:59:59,170 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 13:59:59,182 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-04 13:59:59,194 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-04 13:59:59,195 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-04 13:59:59,197 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-04 13:59:59,199 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-04 13:59:59,200 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-04 13:59:59,200 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-04 13:59:59,202 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-04 13:59:59,202 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-04 13:59:59,202 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 13:59:59,204 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 13:59:59,205 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 13:59:59,207 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-04 13:59:59,257 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 13:59:59,257 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 13:59:59,260 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-04 13:59:59,261 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-04 13:59:59,261 INFO L138 SettingsManager]: * Use SBE=true [2020-09-04 13:59:59,261 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 13:59:59,261 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 13:59:59,261 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 13:59:59,262 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 13:59:59,262 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 13:59:59,263 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 13:59:59,263 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 13:59:59,263 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 13:59:59,264 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 13:59:59,264 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 13:59:59,264 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 13:59:59,265 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 13:59:59,265 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 13:59:59,265 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-04 13:59:59,265 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 13:59:59,265 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 13:59:59,266 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 13:59:59,266 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 13:59:59,266 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-04 13:59:59,266 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-04 13:59:59,267 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-04 13:59:59,267 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-04 13:59:59,267 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 13:59:59,267 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-04 13:59:59,267 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-09-04 13:59:59,755 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 13:59:59,774 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 13:59:59,779 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 13:59:59,780 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 13:59:59,781 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 13:59:59,782 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-04 13:59:59,863 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c28a39039/a45275d1931e4eefad819ecebf59876b/FLAG028cd9deb [2020-09-04 14:00:00,622 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 14:00:00,623 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-04 14:00:00,647 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c28a39039/a45275d1931e4eefad819ecebf59876b/FLAG028cd9deb [2020-09-04 14:00:00,738 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c28a39039/a45275d1931e4eefad819ecebf59876b [2020-09-04 14:00:00,750 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 14:00:00,753 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 14:00:00,754 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 14:00:00,754 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 14:00:00,758 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 14:00:00,760 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 02:00:00" (1/1) ... [2020-09-04 14:00:00,764 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2876d654 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 02:00:00, skipping insertion in model container [2020-09-04 14:00:00,764 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 02:00:00" (1/1) ... [2020-09-04 14:00:00,773 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 14:00:00,891 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 14:00:01,830 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 14:00:01,846 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 14:00:02,623 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 14:00:02,655 INFO L208 MainTranslator]: Completed translation [2020-09-04 14:00:02,656 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 02:00:02 WrapperNode [2020-09-04 14:00:02,656 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 14:00:02,657 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 14:00:02,657 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 14:00:02,658 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 14:00:02,681 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 02:00:02" (1/1) ... [2020-09-04 14:00:02,682 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 02:00:02" (1/1) ... [2020-09-04 14:00:02,712 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 02:00:02" (1/1) ... [2020-09-04 14:00:02,712 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 02:00:02" (1/1) ... [2020-09-04 14:00:02,798 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 02:00:02" (1/1) ... [2020-09-04 14:00:02,820 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 02:00:02" (1/1) ... [2020-09-04 14:00:02,828 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 02:00:02" (1/1) ... [2020-09-04 14:00:02,844 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 14:00:02,845 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 14:00:02,845 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 14:00:02,845 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 14:00:02,848 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 02:00:02" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 14:00:02,938 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 14:00:02,939 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 14:00:02,939 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-04 14:00:02,939 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 14:00:02,940 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 14:00:02,940 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-04 14:00:02,940 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-09-04 14:00:02,940 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-09-04 14:00:02,941 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-09-04 14:00:02,941 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-04 14:00:02,941 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-04 14:00:02,942 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-09-04 14:00:02,942 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-09-04 14:00:02,943 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-09-04 14:00:02,943 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-09-04 14:00:02,944 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-09-04 14:00:02,944 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-09-04 14:00:02,945 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-04 14:00:02,945 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-04 14:00:02,945 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 14:00:02,945 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 14:00:02,945 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 14:00:05,638 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 14:00:05,639 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-04 14:00:05,659 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 02:00:05 BoogieIcfgContainer [2020-09-04 14:00:05,660 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 14:00:05,664 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 14:00:05,665 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 14:00:05,669 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 14:00:05,670 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 02:00:00" (1/3) ... [2020-09-04 14:00:05,671 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b962f3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 02:00:05, skipping insertion in model container [2020-09-04 14:00:05,672 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 02:00:02" (2/3) ... [2020-09-04 14:00:05,672 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b962f3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 02:00:05, skipping insertion in model container [2020-09-04 14:00:05,673 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 02:00:05" (3/3) ... [2020-09-04 14:00:05,675 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-04 14:00:05,691 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-09-04 14:00:05,710 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 14:00:05,735 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 14:00:05,783 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 14:00:05,784 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 14:00:05,784 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-09-04 14:00:05,784 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 14:00:05,784 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 14:00:05,784 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 14:00:05,785 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 14:00:05,785 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 14:00:05,842 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states. [2020-09-04 14:00:05,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2020-09-04 14:00:05,888 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:00:05,890 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 14:00:05,891 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:00:05,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:00:05,899 INFO L82 PathProgramCache]: Analyzing trace with hash 578636414, now seen corresponding path program 1 times [2020-09-04 14:00:05,914 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:00:05,914 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472720491] [2020-09-04 14:00:05,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:00:06,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:00:07,714 WARN L193 SmtUtils]: Spent 517.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-09-04 14:00:07,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:00:07,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:00:07,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 14:00:07,903 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472720491] [2020-09-04 14:00:07,904 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:00:07,904 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 14:00:07,905 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748987518] [2020-09-04 14:00:07,913 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 14:00:07,913 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:00:07,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 14:00:07,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:00:07,934 INFO L87 Difference]: Start difference. First operand 796 states. Second operand 4 states. [2020-09-04 14:00:08,566 WARN L193 SmtUtils]: Spent 539.00 ms on a formula simplification that was a NOOP. DAG size: 278 [2020-09-04 14:00:14,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 14:00:14,061 INFO L93 Difference]: Finished difference Result 1515 states and 2659 transitions. [2020-09-04 14:00:14,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-04 14:00:14,065 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 318 [2020-09-04 14:00:14,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 14:00:14,112 INFO L225 Difference]: With dead ends: 1515 [2020-09-04 14:00:14,113 INFO L226 Difference]: Without dead ends: 1299 [2020-09-04 14:00:14,126 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-04 14:00:14,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1299 states. [2020-09-04 14:00:14,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1299 to 1297. [2020-09-04 14:00:14,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1297 states. [2020-09-04 14:00:14,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1297 states to 1297 states and 2028 transitions. [2020-09-04 14:00:14,316 INFO L78 Accepts]: Start accepts. Automaton has 1297 states and 2028 transitions. Word has length 318 [2020-09-04 14:00:14,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 14:00:14,322 INFO L479 AbstractCegarLoop]: Abstraction has 1297 states and 2028 transitions. [2020-09-04 14:00:14,322 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 14:00:14,322 INFO L276 IsEmpty]: Start isEmpty. Operand 1297 states and 2028 transitions. [2020-09-04 14:00:14,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2020-09-04 14:00:14,333 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:00:14,334 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 14:00:14,334 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 14:00:14,334 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:00:14,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:00:14,335 INFO L82 PathProgramCache]: Analyzing trace with hash 1367796252, now seen corresponding path program 1 times [2020-09-04 14:00:14,335 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:00:14,336 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049929756] [2020-09-04 14:00:14,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:00:14,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:00:15,560 WARN L193 SmtUtils]: Spent 580.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-09-04 14:00:15,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:00:15,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:00:15,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 14:00:15,922 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049929756] [2020-09-04 14:00:15,922 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:00:15,923 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 14:00:15,923 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296052522] [2020-09-04 14:00:15,928 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 14:00:15,928 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:00:15,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 14:00:15,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:00:15,930 INFO L87 Difference]: Start difference. First operand 1297 states and 2028 transitions. Second operand 4 states. [2020-09-04 14:00:16,489 WARN L193 SmtUtils]: Spent 503.00 ms on a formula simplification that was a NOOP. DAG size: 278 [2020-09-04 14:00:21,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 14:00:21,322 INFO L93 Difference]: Finished difference Result 2671 states and 4201 transitions. [2020-09-04 14:00:21,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-04 14:00:21,323 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 318 [2020-09-04 14:00:21,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 14:00:21,343 INFO L225 Difference]: With dead ends: 2671 [2020-09-04 14:00:21,344 INFO L226 Difference]: Without dead ends: 2289 [2020-09-04 14:00:21,354 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-04 14:00:21,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2289 states. [2020-09-04 14:00:21,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2289 to 2287. [2020-09-04 14:00:21,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2287 states. [2020-09-04 14:00:21,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2287 states to 2287 states and 3564 transitions. [2020-09-04 14:00:21,478 INFO L78 Accepts]: Start accepts. Automaton has 2287 states and 3564 transitions. Word has length 318 [2020-09-04 14:00:21,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 14:00:21,479 INFO L479 AbstractCegarLoop]: Abstraction has 2287 states and 3564 transitions. [2020-09-04 14:00:21,479 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 14:00:21,480 INFO L276 IsEmpty]: Start isEmpty. Operand 2287 states and 3564 transitions. [2020-09-04 14:00:21,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2020-09-04 14:00:21,494 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:00:21,495 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 14:00:21,495 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-04 14:00:21,496 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:00:21,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:00:21,497 INFO L82 PathProgramCache]: Analyzing trace with hash -1797025293, now seen corresponding path program 1 times [2020-09-04 14:00:21,497 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:00:21,498 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154613277] [2020-09-04 14:00:21,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:00:21,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:00:22,551 WARN L193 SmtUtils]: Spent 402.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-09-04 14:00:22,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:00:22,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:00:22,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 14:00:22,782 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154613277] [2020-09-04 14:00:22,782 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:00:22,783 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 14:00:22,783 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170180941] [2020-09-04 14:00:22,784 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 14:00:22,784 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:00:22,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 14:00:22,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:00:22,786 INFO L87 Difference]: Start difference. First operand 2287 states and 3564 transitions. Second operand 4 states. [2020-09-04 14:00:23,292 WARN L193 SmtUtils]: Spent 474.00 ms on a formula simplification that was a NOOP. DAG size: 278 [2020-09-04 14:00:27,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 14:00:27,587 INFO L93 Difference]: Finished difference Result 4943 states and 7762 transitions. [2020-09-04 14:00:27,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-04 14:00:27,588 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 318 [2020-09-04 14:00:27,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 14:00:27,611 INFO L225 Difference]: With dead ends: 4943 [2020-09-04 14:00:27,611 INFO L226 Difference]: Without dead ends: 4229 [2020-09-04 14:00:27,614 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-04 14:00:27,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4229 states. [2020-09-04 14:00:27,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4229 to 4227. [2020-09-04 14:00:27,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4227 states. [2020-09-04 14:00:27,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4227 states to 4227 states and 6568 transitions. [2020-09-04 14:00:27,743 INFO L78 Accepts]: Start accepts. Automaton has 4227 states and 6568 transitions. Word has length 318 [2020-09-04 14:00:27,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 14:00:27,743 INFO L479 AbstractCegarLoop]: Abstraction has 4227 states and 6568 transitions. [2020-09-04 14:00:27,743 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 14:00:27,744 INFO L276 IsEmpty]: Start isEmpty. Operand 4227 states and 6568 transitions. [2020-09-04 14:00:27,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2020-09-04 14:00:27,754 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:00:27,754 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 14:00:27,755 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-04 14:00:27,755 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:00:27,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:00:27,755 INFO L82 PathProgramCache]: Analyzing trace with hash 1914723175, now seen corresponding path program 1 times [2020-09-04 14:00:27,756 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:00:27,756 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768228856] [2020-09-04 14:00:27,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:00:27,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:00:28,714 WARN L193 SmtUtils]: Spent 508.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-09-04 14:00:28,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:00:28,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:00:28,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 14:00:28,830 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768228856] [2020-09-04 14:00:28,830 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:00:28,830 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 14:00:28,831 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907516743] [2020-09-04 14:00:28,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 14:00:28,832 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:00:28,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 14:00:28,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:00:28,832 INFO L87 Difference]: Start difference. First operand 4227 states and 6568 transitions. Second operand 4 states. [2020-09-04 14:00:29,393 WARN L193 SmtUtils]: Spent 524.00 ms on a formula simplification that was a NOOP. DAG size: 278 [2020-09-04 14:00:33,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 14:00:33,762 INFO L93 Difference]: Finished difference Result 9359 states and 14670 transitions. [2020-09-04 14:00:33,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-04 14:00:33,765 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 318 [2020-09-04 14:00:33,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 14:00:33,804 INFO L225 Difference]: With dead ends: 9359 [2020-09-04 14:00:33,804 INFO L226 Difference]: Without dead ends: 8029 [2020-09-04 14:00:33,810 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-04 14:00:33,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8029 states. [2020-09-04 14:00:34,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8029 to 8027. [2020-09-04 14:00:34,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8027 states. [2020-09-04 14:00:34,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8027 states to 8027 states and 12440 transitions. [2020-09-04 14:00:34,036 INFO L78 Accepts]: Start accepts. Automaton has 8027 states and 12440 transitions. Word has length 318 [2020-09-04 14:00:34,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 14:00:34,037 INFO L479 AbstractCegarLoop]: Abstraction has 8027 states and 12440 transitions. [2020-09-04 14:00:34,037 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 14:00:34,037 INFO L276 IsEmpty]: Start isEmpty. Operand 8027 states and 12440 transitions. [2020-09-04 14:00:34,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2020-09-04 14:00:34,054 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:00:34,054 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 14:00:34,054 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-04 14:00:34,055 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:00:34,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:00:34,055 INFO L82 PathProgramCache]: Analyzing trace with hash 769893352, now seen corresponding path program 1 times [2020-09-04 14:00:34,056 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:00:34,056 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539669851] [2020-09-04 14:00:34,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:00:34,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:00:35,130 WARN L193 SmtUtils]: Spent 425.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-09-04 14:00:35,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:00:35,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:00:35,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 14:00:35,274 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539669851] [2020-09-04 14:00:35,274 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:00:35,274 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 14:00:35,274 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732838920] [2020-09-04 14:00:35,275 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 14:00:35,275 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:00:35,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 14:00:35,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-04 14:00:35,276 INFO L87 Difference]: Start difference. First operand 8027 states and 12440 transitions. Second operand 5 states. [2020-09-04 14:00:42,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 14:00:42,782 INFO L93 Difference]: Finished difference Result 23754 states and 36777 transitions. [2020-09-04 14:00:42,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-04 14:00:42,782 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 318 [2020-09-04 14:00:42,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 14:00:42,839 INFO L225 Difference]: With dead ends: 23754 [2020-09-04 14:00:42,839 INFO L226 Difference]: Without dead ends: 15742 [2020-09-04 14:00:42,852 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-04 14:00:42,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15742 states. [2020-09-04 14:00:43,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15742 to 15740. [2020-09-04 14:00:43,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15740 states. [2020-09-04 14:00:43,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15740 states to 15740 states and 24254 transitions. [2020-09-04 14:00:43,300 INFO L78 Accepts]: Start accepts. Automaton has 15740 states and 24254 transitions. Word has length 318 [2020-09-04 14:00:43,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 14:00:43,300 INFO L479 AbstractCegarLoop]: Abstraction has 15740 states and 24254 transitions. [2020-09-04 14:00:43,301 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 14:00:43,301 INFO L276 IsEmpty]: Start isEmpty. Operand 15740 states and 24254 transitions. [2020-09-04 14:00:43,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2020-09-04 14:00:43,337 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:00:43,337 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 14:00:43,338 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-04 14:00:43,338 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:00:43,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:00:43,338 INFO L82 PathProgramCache]: Analyzing trace with hash -685152901, now seen corresponding path program 1 times [2020-09-04 14:00:43,339 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:00:43,339 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908973989] [2020-09-04 14:00:43,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:00:43,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:00:44,117 WARN L193 SmtUtils]: Spent 439.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-09-04 14:00:44,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:00:44,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:00:44,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 14:00:44,258 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908973989] [2020-09-04 14:00:44,259 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:00:44,259 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 14:00:44,259 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31183095] [2020-09-04 14:00:44,260 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 14:00:44,260 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:00:44,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 14:00:44,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:00:44,261 INFO L87 Difference]: Start difference. First operand 15740 states and 24254 transitions. Second operand 4 states. [2020-09-04 14:00:53,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 14:00:53,623 INFO L93 Difference]: Finished difference Result 46481 states and 71518 transitions. [2020-09-04 14:00:53,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 14:00:53,624 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 320 [2020-09-04 14:00:53,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 14:00:53,698 INFO L225 Difference]: With dead ends: 46481 [2020-09-04 14:00:53,699 INFO L226 Difference]: Without dead ends: 30870 [2020-09-04 14:00:53,743 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:00:53,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30870 states. [2020-09-04 14:00:54,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30870 to 30868. [2020-09-04 14:00:54,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30868 states. [2020-09-04 14:00:54,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30868 states to 30868 states and 47285 transitions. [2020-09-04 14:00:54,981 INFO L78 Accepts]: Start accepts. Automaton has 30868 states and 47285 transitions. Word has length 320 [2020-09-04 14:00:54,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 14:00:54,982 INFO L479 AbstractCegarLoop]: Abstraction has 30868 states and 47285 transitions. [2020-09-04 14:00:54,982 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 14:00:54,982 INFO L276 IsEmpty]: Start isEmpty. Operand 30868 states and 47285 transitions. [2020-09-04 14:00:55,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2020-09-04 14:00:55,037 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:00:55,037 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 14:00:55,037 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-04 14:00:55,038 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:00:55,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:00:55,038 INFO L82 PathProgramCache]: Analyzing trace with hash -810813248, now seen corresponding path program 1 times [2020-09-04 14:00:55,038 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:00:55,039 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853316236] [2020-09-04 14:00:55,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:00:55,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:00:55,661 WARN L193 SmtUtils]: Spent 470.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-09-04 14:00:55,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:00:55,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:00:55,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 14:00:55,756 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853316236] [2020-09-04 14:00:55,756 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:00:55,757 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 14:00:55,757 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489532578] [2020-09-04 14:00:55,758 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 14:00:55,758 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:00:55,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 14:00:55,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:00:55,759 INFO L87 Difference]: Start difference. First operand 30868 states and 47285 transitions. Second operand 4 states. [2020-09-04 14:01:06,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 14:01:06,059 INFO L93 Difference]: Finished difference Result 92529 states and 141731 transitions. [2020-09-04 14:01:06,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 14:01:06,060 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 320 [2020-09-04 14:01:06,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 14:01:06,213 INFO L225 Difference]: With dead ends: 92529 [2020-09-04 14:01:06,213 INFO L226 Difference]: Without dead ends: 61703 [2020-09-04 14:01:06,280 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:01:06,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61703 states. [2020-09-04 14:01:07,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61703 to 30887. [2020-09-04 14:01:07,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30887 states. [2020-09-04 14:01:07,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30887 states to 30887 states and 47313 transitions. [2020-09-04 14:01:07,615 INFO L78 Accepts]: Start accepts. Automaton has 30887 states and 47313 transitions. Word has length 320 [2020-09-04 14:01:07,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 14:01:07,615 INFO L479 AbstractCegarLoop]: Abstraction has 30887 states and 47313 transitions. [2020-09-04 14:01:07,616 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 14:01:07,616 INFO L276 IsEmpty]: Start isEmpty. Operand 30887 states and 47313 transitions. [2020-09-04 14:01:07,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2020-09-04 14:01:07,668 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:01:07,668 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 14:01:07,669 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-04 14:01:07,669 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:01:07,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:01:07,669 INFO L82 PathProgramCache]: Analyzing trace with hash -83680004, now seen corresponding path program 1 times [2020-09-04 14:01:07,670 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:01:07,670 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394937057] [2020-09-04 14:01:07,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:01:07,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:01:08,274 WARN L193 SmtUtils]: Spent 459.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-09-04 14:01:08,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:01:08,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:01:08,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 14:01:08,375 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394937057] [2020-09-04 14:01:08,375 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:01:08,376 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 14:01:08,376 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181289693] [2020-09-04 14:01:08,377 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 14:01:08,377 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:01:08,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 14:01:08,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:01:08,378 INFO L87 Difference]: Start difference. First operand 30887 states and 47313 transitions. Second operand 4 states. [2020-09-04 14:01:18,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 14:01:18,932 INFO L93 Difference]: Finished difference Result 92548 states and 141752 transitions. [2020-09-04 14:01:18,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 14:01:18,933 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 321 [2020-09-04 14:01:18,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 14:01:19,055 INFO L225 Difference]: With dead ends: 92548 [2020-09-04 14:01:19,056 INFO L226 Difference]: Without dead ends: 61721 [2020-09-04 14:01:19,102 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:01:19,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61721 states. [2020-09-04 14:01:20,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61721 to 30905. [2020-09-04 14:01:20,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30905 states. [2020-09-04 14:01:20,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30905 states to 30905 states and 47334 transitions. [2020-09-04 14:01:20,495 INFO L78 Accepts]: Start accepts. Automaton has 30905 states and 47334 transitions. Word has length 321 [2020-09-04 14:01:20,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 14:01:20,496 INFO L479 AbstractCegarLoop]: Abstraction has 30905 states and 47334 transitions. [2020-09-04 14:01:20,496 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 14:01:20,496 INFO L276 IsEmpty]: Start isEmpty. Operand 30905 states and 47334 transitions. [2020-09-04 14:01:20,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2020-09-04 14:01:20,526 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:01:20,526 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 14:01:20,527 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-04 14:01:20,527 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:01:20,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:01:20,527 INFO L82 PathProgramCache]: Analyzing trace with hash 165674294, now seen corresponding path program 1 times [2020-09-04 14:01:20,527 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:01:20,528 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584168242] [2020-09-04 14:01:20,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:01:20,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:01:21,275 WARN L193 SmtUtils]: Spent 452.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-09-04 14:01:21,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:01:21,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:01:21,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 14:01:21,397 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584168242] [2020-09-04 14:01:21,397 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:01:21,398 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 14:01:21,398 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862132749] [2020-09-04 14:01:21,398 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 14:01:21,398 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:01:21,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 14:01:21,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:01:21,399 INFO L87 Difference]: Start difference. First operand 30905 states and 47334 transitions. Second operand 4 states. [2020-09-04 14:01:31,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 14:01:31,874 INFO L93 Difference]: Finished difference Result 87746 states and 134159 transitions. [2020-09-04 14:01:31,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 14:01:31,875 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 322 [2020-09-04 14:01:31,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 14:01:31,955 INFO L225 Difference]: With dead ends: 87746 [2020-09-04 14:01:31,955 INFO L226 Difference]: Without dead ends: 57086 [2020-09-04 14:01:31,994 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:01:32,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57086 states. [2020-09-04 14:01:35,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57086 to 57084. [2020-09-04 14:01:35,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57084 states. [2020-09-04 14:01:35,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57084 states to 57084 states and 86830 transitions. [2020-09-04 14:01:35,109 INFO L78 Accepts]: Start accepts. Automaton has 57084 states and 86830 transitions. Word has length 322 [2020-09-04 14:01:35,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 14:01:35,110 INFO L479 AbstractCegarLoop]: Abstraction has 57084 states and 86830 transitions. [2020-09-04 14:01:35,110 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 14:01:35,110 INFO L276 IsEmpty]: Start isEmpty. Operand 57084 states and 86830 transitions. [2020-09-04 14:01:35,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2020-09-04 14:01:35,156 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:01:35,156 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 14:01:35,157 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-04 14:01:35,157 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:01:35,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:01:35,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1404392915, now seen corresponding path program 1 times [2020-09-04 14:01:35,157 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:01:35,158 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856213991] [2020-09-04 14:01:35,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:01:35,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:01:36,049 WARN L193 SmtUtils]: Spent 393.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-09-04 14:01:36,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:01:36,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:01:36,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 14:01:36,164 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856213991] [2020-09-04 14:01:36,164 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:01:36,164 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 14:01:36,164 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051521356] [2020-09-04 14:01:36,165 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 14:01:36,165 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:01:36,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 14:01:36,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-04 14:01:36,166 INFO L87 Difference]: Start difference. First operand 57084 states and 86830 transitions. Second operand 5 states. [2020-09-04 14:01:44,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 14:01:44,077 INFO L93 Difference]: Finished difference Result 115449 states and 175645 transitions. [2020-09-04 14:01:44,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-04 14:01:44,078 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 322 [2020-09-04 14:01:44,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 14:01:44,139 INFO L225 Difference]: With dead ends: 115449 [2020-09-04 14:01:44,139 INFO L226 Difference]: Without dead ends: 57905 [2020-09-04 14:01:44,185 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-04 14:01:44,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57905 states. [2020-09-04 14:01:46,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57905 to 57903. [2020-09-04 14:01:46,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57903 states. [2020-09-04 14:01:46,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57903 states to 57903 states and 87752 transitions. [2020-09-04 14:01:46,095 INFO L78 Accepts]: Start accepts. Automaton has 57903 states and 87752 transitions. Word has length 322 [2020-09-04 14:01:46,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 14:01:46,095 INFO L479 AbstractCegarLoop]: Abstraction has 57903 states and 87752 transitions. [2020-09-04 14:01:46,095 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 14:01:46,095 INFO L276 IsEmpty]: Start isEmpty. Operand 57903 states and 87752 transitions. [2020-09-04 14:01:46,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2020-09-04 14:01:46,129 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:01:46,129 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 14:01:46,130 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-04 14:01:46,130 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:01:46,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:01:46,130 INFO L82 PathProgramCache]: Analyzing trace with hash -715741738, now seen corresponding path program 1 times [2020-09-04 14:01:46,130 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:01:46,131 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077834216] [2020-09-04 14:01:46,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:01:46,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:01:46,768 WARN L193 SmtUtils]: Spent 490.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-09-04 14:01:46,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:01:46,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:01:46,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 14:01:46,854 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077834216] [2020-09-04 14:01:46,854 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:01:46,854 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 14:01:46,855 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399743843] [2020-09-04 14:01:46,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 14:01:46,855 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:01:46,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 14:01:46,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:01:46,856 INFO L87 Difference]: Start difference. First operand 57903 states and 87752 transitions. Second operand 4 states. [2020-09-04 14:01:56,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 14:01:56,711 INFO L93 Difference]: Finished difference Result 172837 states and 261779 transitions. [2020-09-04 14:01:56,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 14:01:56,712 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 324 [2020-09-04 14:01:56,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 14:01:56,841 INFO L225 Difference]: With dead ends: 172837 [2020-09-04 14:01:56,842 INFO L226 Difference]: Without dead ends: 115387 [2020-09-04 14:01:56,888 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:01:56,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115387 states. [2020-09-04 14:01:59,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115387 to 57961. [2020-09-04 14:01:59,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57961 states. [2020-09-04 14:01:59,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57961 states to 57961 states and 87827 transitions. [2020-09-04 14:01:59,273 INFO L78 Accepts]: Start accepts. Automaton has 57961 states and 87827 transitions. Word has length 324 [2020-09-04 14:01:59,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 14:01:59,273 INFO L479 AbstractCegarLoop]: Abstraction has 57961 states and 87827 transitions. [2020-09-04 14:01:59,273 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 14:01:59,273 INFO L276 IsEmpty]: Start isEmpty. Operand 57961 states and 87827 transitions. [2020-09-04 14:01:59,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2020-09-04 14:01:59,306 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:01:59,307 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 14:01:59,307 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-04 14:01:59,307 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:01:59,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:01:59,308 INFO L82 PathProgramCache]: Analyzing trace with hash 396725324, now seen corresponding path program 1 times [2020-09-04 14:01:59,308 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:01:59,308 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125647034] [2020-09-04 14:01:59,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:01:59,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:02:00,032 WARN L193 SmtUtils]: Spent 478.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-09-04 14:02:00,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:02:00,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:02:00,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 14:02:00,165 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125647034] [2020-09-04 14:02:00,166 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:02:00,166 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 14:02:00,166 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857794492] [2020-09-04 14:02:00,167 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 14:02:00,167 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:02:00,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 14:02:00,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:02:00,167 INFO L87 Difference]: Start difference. First operand 57961 states and 87827 transitions. Second operand 4 states. [2020-09-04 14:02:14,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 14:02:14,452 INFO L93 Difference]: Finished difference Result 171218 states and 259030 transitions. [2020-09-04 14:02:14,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 14:02:14,453 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 324 [2020-09-04 14:02:14,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 14:02:14,572 INFO L225 Difference]: With dead ends: 171218 [2020-09-04 14:02:14,572 INFO L226 Difference]: Without dead ends: 113542 [2020-09-04 14:02:14,611 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:02:14,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113542 states. [2020-09-04 14:02:18,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113542 to 113540. [2020-09-04 14:02:18,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113540 states. [2020-09-04 14:02:19,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113540 states to 113540 states and 170856 transitions. [2020-09-04 14:02:19,127 INFO L78 Accepts]: Start accepts. Automaton has 113540 states and 170856 transitions. Word has length 324 [2020-09-04 14:02:19,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 14:02:19,127 INFO L479 AbstractCegarLoop]: Abstraction has 113540 states and 170856 transitions. [2020-09-04 14:02:19,128 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 14:02:19,128 INFO L276 IsEmpty]: Start isEmpty. Operand 113540 states and 170856 transitions. [2020-09-04 14:02:19,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2020-09-04 14:02:19,195 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:02:19,195 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 14:02:19,195 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-04 14:02:19,195 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:02:19,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:02:19,196 INFO L82 PathProgramCache]: Analyzing trace with hash 1430415401, now seen corresponding path program 1 times [2020-09-04 14:02:19,196 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:02:19,196 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819550943] [2020-09-04 14:02:19,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:02:19,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:02:20,111 WARN L193 SmtUtils]: Spent 492.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-09-04 14:02:20,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:02:20,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:02:20,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 14:02:20,209 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819550943] [2020-09-04 14:02:20,210 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:02:20,210 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 14:02:20,210 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944864718] [2020-09-04 14:02:20,211 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 14:02:20,211 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:02:20,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 14:02:20,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-04 14:02:20,212 INFO L87 Difference]: Start difference. First operand 113540 states and 170856 transitions. Second operand 5 states. [2020-09-04 14:02:32,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 14:02:32,865 INFO L93 Difference]: Finished difference Result 230524 states and 346909 transitions. [2020-09-04 14:02:32,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-04 14:02:32,866 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 324 [2020-09-04 14:02:32,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 14:02:33,004 INFO L225 Difference]: With dead ends: 230524 [2020-09-04 14:02:33,004 INFO L226 Difference]: Without dead ends: 115930 [2020-09-04 14:02:33,073 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-04 14:02:33,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115930 states. [2020-09-04 14:02:40,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115930 to 115928. [2020-09-04 14:02:40,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115928 states. [2020-09-04 14:02:40,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115928 states to 115928 states and 173777 transitions. [2020-09-04 14:02:40,425 INFO L78 Accepts]: Start accepts. Automaton has 115928 states and 173777 transitions. Word has length 324 [2020-09-04 14:02:40,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 14:02:40,425 INFO L479 AbstractCegarLoop]: Abstraction has 115928 states and 173777 transitions. [2020-09-04 14:02:40,425 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 14:02:40,425 INFO L276 IsEmpty]: Start isEmpty. Operand 115928 states and 173777 transitions. [2020-09-04 14:02:40,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2020-09-04 14:02:40,497 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:02:40,497 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 14:02:40,498 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-04 14:02:40,498 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:02:40,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:02:40,498 INFO L82 PathProgramCache]: Analyzing trace with hash 1590895399, now seen corresponding path program 1 times [2020-09-04 14:02:40,498 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:02:40,498 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586340832] [2020-09-04 14:02:40,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:02:40,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:02:41,481 WARN L193 SmtUtils]: Spent 480.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-09-04 14:02:41,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:02:41,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:02:41,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 14:02:41,596 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586340832] [2020-09-04 14:02:41,596 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:02:41,597 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 14:02:41,597 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007286441] [2020-09-04 14:02:41,597 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 14:02:41,597 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:02:41,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 14:02:41,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-04 14:02:41,598 INFO L87 Difference]: Start difference. First operand 115928 states and 173777 transitions. Second operand 5 states. [2020-09-04 14:03:01,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 14:03:01,092 INFO L93 Difference]: Finished difference Result 335870 states and 502884 transitions. [2020-09-04 14:03:01,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-04 14:03:01,093 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 324 [2020-09-04 14:03:01,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 14:03:01,840 INFO L225 Difference]: With dead ends: 335870 [2020-09-04 14:03:01,840 INFO L226 Difference]: Without dead ends: 222078 [2020-09-04 14:03:01,924 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-04 14:03:02,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222078 states. [2020-09-04 14:03:11,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222078 to 116527. [2020-09-04 14:03:11,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116527 states. [2020-09-04 14:03:11,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116527 states to 116527 states and 174665 transitions. [2020-09-04 14:03:11,329 INFO L78 Accepts]: Start accepts. Automaton has 116527 states and 174665 transitions. Word has length 324 [2020-09-04 14:03:11,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 14:03:11,330 INFO L479 AbstractCegarLoop]: Abstraction has 116527 states and 174665 transitions. [2020-09-04 14:03:11,330 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 14:03:11,330 INFO L276 IsEmpty]: Start isEmpty. Operand 116527 states and 174665 transitions. [2020-09-04 14:03:11,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2020-09-04 14:03:11,404 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:03:11,404 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 14:03:11,405 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-04 14:03:11,405 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:03:11,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:03:11,405 INFO L82 PathProgramCache]: Analyzing trace with hash 445665130, now seen corresponding path program 1 times [2020-09-04 14:03:11,405 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:03:11,406 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140855272] [2020-09-04 14:03:11,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:03:11,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:03:12,069 WARN L193 SmtUtils]: Spent 442.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-09-04 14:03:12,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:03:12,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:03:12,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 14:03:12,154 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140855272] [2020-09-04 14:03:12,154 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:03:12,155 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 14:03:12,155 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638551266] [2020-09-04 14:03:12,155 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 14:03:12,156 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:03:12,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 14:03:12,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:03:12,156 INFO L87 Difference]: Start difference. First operand 116527 states and 174665 transitions. Second operand 4 states. [2020-09-04 14:03:30,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 14:03:30,779 INFO L93 Difference]: Finished difference Result 295959 states and 447163 transitions. [2020-09-04 14:03:30,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 14:03:30,780 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 324 [2020-09-04 14:03:30,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 14:03:31,006 INFO L225 Difference]: With dead ends: 295959 [2020-09-04 14:03:31,006 INFO L226 Difference]: Without dead ends: 185953 [2020-09-04 14:03:31,087 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:03:31,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185953 states. [2020-09-04 14:03:39,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185953 to 146431. [2020-09-04 14:03:39,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146431 states. [2020-09-04 14:03:40,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146431 states to 146431 states and 223023 transitions. [2020-09-04 14:03:40,020 INFO L78 Accepts]: Start accepts. Automaton has 146431 states and 223023 transitions. Word has length 324 [2020-09-04 14:03:40,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 14:03:40,020 INFO L479 AbstractCegarLoop]: Abstraction has 146431 states and 223023 transitions. [2020-09-04 14:03:40,020 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 14:03:40,021 INFO L276 IsEmpty]: Start isEmpty. Operand 146431 states and 223023 transitions. [2020-09-04 14:03:40,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-09-04 14:03:40,097 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:03:40,097 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 14:03:40,097 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-04 14:03:40,097 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:03:40,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:03:40,098 INFO L82 PathProgramCache]: Analyzing trace with hash -1844980394, now seen corresponding path program 1 times [2020-09-04 14:03:40,098 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:03:40,098 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558680217] [2020-09-04 14:03:40,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:03:40,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:03:40,797 WARN L193 SmtUtils]: Spent 475.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-09-04 14:03:40,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:03:40,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:03:40,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 14:03:40,877 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558680217] [2020-09-04 14:03:40,877 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:03:40,877 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 14:03:40,877 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892862966] [2020-09-04 14:03:40,878 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 14:03:40,878 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:03:40,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 14:03:40,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:03:40,879 INFO L87 Difference]: Start difference. First operand 146431 states and 223023 transitions. Second operand 4 states. [2020-09-04 14:04:03,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 14:04:03,857 INFO L93 Difference]: Finished difference Result 370475 states and 567117 transitions. [2020-09-04 14:04:03,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 14:04:03,858 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 326 [2020-09-04 14:04:03,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 14:04:04,163 INFO L225 Difference]: With dead ends: 370475 [2020-09-04 14:04:04,163 INFO L226 Difference]: Without dead ends: 231969 [2020-09-04 14:04:04,273 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:04:04,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231969 states. [2020-09-04 14:04:19,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231969 to 199919. [2020-09-04 14:04:19,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199919 states. [2020-09-04 14:04:19,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199919 states to 199919 states and 309151 transitions. [2020-09-04 14:04:19,336 INFO L78 Accepts]: Start accepts. Automaton has 199919 states and 309151 transitions. Word has length 326 [2020-09-04 14:04:19,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 14:04:19,337 INFO L479 AbstractCegarLoop]: Abstraction has 199919 states and 309151 transitions. [2020-09-04 14:04:19,337 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 14:04:19,337 INFO L276 IsEmpty]: Start isEmpty. Operand 199919 states and 309151 transitions. [2020-09-04 14:04:19,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-09-04 14:04:19,409 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:04:19,409 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 14:04:19,409 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-04 14:04:19,410 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:04:19,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:04:19,410 INFO L82 PathProgramCache]: Analyzing trace with hash 1689083675, now seen corresponding path program 1 times [2020-09-04 14:04:19,410 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:04:19,410 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658479429] [2020-09-04 14:04:19,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:04:19,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:04:20,076 WARN L193 SmtUtils]: Spent 515.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-09-04 14:04:20,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:04:20,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:04:20,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 14:04:20,153 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658479429] [2020-09-04 14:04:20,153 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:04:20,153 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 14:04:20,153 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131642232] [2020-09-04 14:04:20,154 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 14:04:20,154 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:04:20,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 14:04:20,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:04:20,155 INFO L87 Difference]: Start difference. First operand 199919 states and 309151 transitions. Second operand 4 states. [2020-09-04 14:04:58,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 14:04:58,161 INFO L93 Difference]: Finished difference Result 593859 states and 917927 transitions. [2020-09-04 14:04:58,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 14:04:58,162 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 326 [2020-09-04 14:04:58,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 14:04:58,704 INFO L225 Difference]: With dead ends: 593859 [2020-09-04 14:04:58,704 INFO L226 Difference]: Without dead ends: 396647 [2020-09-04 14:04:58,833 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:04:59,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396647 states. [2020-09-04 14:05:17,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396647 to 200247. [2020-09-04 14:05:17,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200247 states. [2020-09-04 14:05:17,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200247 states to 200247 states and 309589 transitions. [2020-09-04 14:05:17,363 INFO L78 Accepts]: Start accepts. Automaton has 200247 states and 309589 transitions. Word has length 326 [2020-09-04 14:05:17,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 14:05:17,364 INFO L479 AbstractCegarLoop]: Abstraction has 200247 states and 309589 transitions. [2020-09-04 14:05:17,364 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 14:05:17,364 INFO L276 IsEmpty]: Start isEmpty. Operand 200247 states and 309589 transitions. [2020-09-04 14:05:17,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-09-04 14:05:17,453 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:05:17,454 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 14:05:17,454 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-09-04 14:05:17,454 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:05:17,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:05:17,455 INFO L82 PathProgramCache]: Analyzing trace with hash -700863383, now seen corresponding path program 1 times [2020-09-04 14:05:17,455 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:05:17,455 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706483317] [2020-09-04 14:05:17,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:05:17,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:05:18,094 WARN L193 SmtUtils]: Spent 488.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-09-04 14:05:18,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:05:18,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:05:18,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 14:05:18,202 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706483317] [2020-09-04 14:05:18,202 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:05:18,202 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 14:05:18,203 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908380297] [2020-09-04 14:05:18,205 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 14:05:18,205 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:05:18,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 14:05:18,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:05:18,206 INFO L87 Difference]: Start difference. First operand 200247 states and 309589 transitions. Second operand 4 states. [2020-09-04 14:05:59,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 14:05:59,161 INFO L93 Difference]: Finished difference Result 594135 states and 918201 transitions. [2020-09-04 14:05:59,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 14:05:59,162 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 327 [2020-09-04 14:05:59,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 14:05:59,769 INFO L225 Difference]: With dead ends: 594135 [2020-09-04 14:05:59,770 INFO L226 Difference]: Without dead ends: 396943 [2020-09-04 14:05:59,916 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:06:00,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396943 states. [2020-09-04 14:06:19,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396943 to 200575. [2020-09-04 14:06:19,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200575 states. [2020-09-04 14:06:20,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200575 states to 200575 states and 309957 transitions. [2020-09-04 14:06:20,273 INFO L78 Accepts]: Start accepts. Automaton has 200575 states and 309957 transitions. Word has length 327 [2020-09-04 14:06:20,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 14:06:20,273 INFO L479 AbstractCegarLoop]: Abstraction has 200575 states and 309957 transitions. [2020-09-04 14:06:20,273 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 14:06:20,274 INFO L276 IsEmpty]: Start isEmpty. Operand 200575 states and 309957 transitions. [2020-09-04 14:06:20,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-09-04 14:06:20,354 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:06:20,355 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 14:06:20,355 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-09-04 14:06:20,355 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:06:20,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:06:20,355 INFO L82 PathProgramCache]: Analyzing trace with hash 1551390185, now seen corresponding path program 1 times [2020-09-04 14:06:20,355 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:06:20,356 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15334334] [2020-09-04 14:06:20,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:06:20,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:06:21,133 WARN L193 SmtUtils]: Spent 500.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-09-04 14:06:21,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:06:21,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:06:21,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 14:06:21,240 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15334334] [2020-09-04 14:06:21,240 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:06:21,240 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 14:06:21,241 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394437541] [2020-09-04 14:06:21,241 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-04 14:06:21,241 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:06:21,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-04 14:06:21,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-04 14:06:21,242 INFO L87 Difference]: Start difference. First operand 200575 states and 309957 transitions. Second operand 6 states. [2020-09-04 14:06:21,882 WARN L193 SmtUtils]: Spent 579.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-09-04 14:06:43,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 14:06:43,936 INFO L93 Difference]: Finished difference Result 394045 states and 609160 transitions. [2020-09-04 14:06:43,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-04 14:06:43,937 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 327 [2020-09-04 14:06:43,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 14:06:44,215 INFO L225 Difference]: With dead ends: 394045 [2020-09-04 14:06:44,215 INFO L226 Difference]: Without dead ends: 200575 [2020-09-04 14:06:44,346 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-09-04 14:06:44,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200575 states. [2020-09-04 14:07:04,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200575 to 200575. [2020-09-04 14:07:04,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200575 states. [2020-09-04 14:07:05,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200575 states to 200575 states and 307435 transitions. [2020-09-04 14:07:05,110 INFO L78 Accepts]: Start accepts. Automaton has 200575 states and 307435 transitions. Word has length 327 [2020-09-04 14:07:05,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 14:07:05,111 INFO L479 AbstractCegarLoop]: Abstraction has 200575 states and 307435 transitions. [2020-09-04 14:07:05,111 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-04 14:07:05,111 INFO L276 IsEmpty]: Start isEmpty. Operand 200575 states and 307435 transitions. [2020-09-04 14:07:05,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-09-04 14:07:05,562 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:07:05,562 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 14:07:05,563 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-09-04 14:07:05,563 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:07:05,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:07:05,563 INFO L82 PathProgramCache]: Analyzing trace with hash 1871199150, now seen corresponding path program 1 times [2020-09-04 14:07:05,563 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:07:05,563 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987156706] [2020-09-04 14:07:05,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:07:05,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:07:06,639 WARN L193 SmtUtils]: Spent 526.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-09-04 14:07:06,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:07:06,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:07:06,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 14:07:06,787 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987156706] [2020-09-04 14:07:06,787 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:07:06,788 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-09-04 14:07:06,788 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484388360] [2020-09-04 14:07:06,788 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-04 14:07:06,788 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:07:06,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-04 14:07:06,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-09-04 14:07:06,789 INFO L87 Difference]: Start difference. First operand 200575 states and 307435 transitions. Second operand 10 states. [2020-09-04 14:07:07,435 WARN L193 SmtUtils]: Spent 541.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-09-04 14:08:05,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 14:08:05,354 INFO L93 Difference]: Finished difference Result 718701 states and 1115096 transitions. [2020-09-04 14:08:05,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-04 14:08:05,355 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 327 [2020-09-04 14:08:05,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 14:08:06,280 INFO L225 Difference]: With dead ends: 718701 [2020-09-04 14:08:06,280 INFO L226 Difference]: Without dead ends: 525879 [2020-09-04 14:08:06,479 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=131, Invalid=289, Unknown=0, NotChecked=0, Total=420 [2020-09-04 14:08:06,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525879 states. [2020-09-04 14:08:46,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525879 to 379911. [2020-09-04 14:08:46,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 379911 states. [2020-09-04 14:08:47,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379911 states to 379911 states and 583047 transitions. [2020-09-04 14:08:47,467 INFO L78 Accepts]: Start accepts. Automaton has 379911 states and 583047 transitions. Word has length 327 [2020-09-04 14:08:47,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 14:08:47,467 INFO L479 AbstractCegarLoop]: Abstraction has 379911 states and 583047 transitions. [2020-09-04 14:08:47,467 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-04 14:08:47,467 INFO L276 IsEmpty]: Start isEmpty. Operand 379911 states and 583047 transitions. [2020-09-04 14:08:47,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-09-04 14:08:47,582 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:08:47,582 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 14:08:47,582 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-09-04 14:08:47,582 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:08:47,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:08:47,583 INFO L82 PathProgramCache]: Analyzing trace with hash -1485523804, now seen corresponding path program 1 times [2020-09-04 14:08:47,583 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:08:47,583 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812818871] [2020-09-04 14:08:47,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:08:47,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:08:48,519 WARN L193 SmtUtils]: Spent 534.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-09-04 14:08:48,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:08:48,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:08:48,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 14:08:48,622 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812818871] [2020-09-04 14:08:48,622 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:08:48,622 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 14:08:48,622 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617607826] [2020-09-04 14:08:48,623 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 14:08:48,623 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:08:48,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 14:08:48,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-04 14:08:48,624 INFO L87 Difference]: Start difference. First operand 379911 states and 583047 transitions. Second operand 5 states. [2020-09-04 14:10:08,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 14:10:08,876 INFO L93 Difference]: Finished difference Result 1121450 states and 1722564 transitions. [2020-09-04 14:10:08,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-04 14:10:08,877 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 327 [2020-09-04 14:10:08,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 14:10:10,155 INFO L225 Difference]: With dead ends: 1121450 [2020-09-04 14:10:10,156 INFO L226 Difference]: Without dead ends: 742370 [2020-09-04 14:10:10,509 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-04 14:10:11,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 742370 states. [2020-09-04 14:11:39,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 742370 to 742368. [2020-09-04 14:11:39,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 742368 states. [2020-09-04 14:11:41,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 742368 states to 742368 states and 1135648 transitions. [2020-09-04 14:11:41,574 INFO L78 Accepts]: Start accepts. Automaton has 742368 states and 1135648 transitions. Word has length 327 [2020-09-04 14:11:41,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 14:11:41,575 INFO L479 AbstractCegarLoop]: Abstraction has 742368 states and 1135648 transitions. [2020-09-04 14:11:41,575 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 14:11:41,575 INFO L276 IsEmpty]: Start isEmpty. Operand 742368 states and 1135648 transitions. [2020-09-04 14:11:41,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-09-04 14:11:41,778 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:11:41,778 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 14:11:41,779 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-09-04 14:11:41,779 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:11:41,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:11:41,779 INFO L82 PathProgramCache]: Analyzing trace with hash 1259906926, now seen corresponding path program 1 times [2020-09-04 14:11:41,779 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:11:41,779 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407591390] [2020-09-04 14:11:41,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:11:41,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:11:42,649 WARN L193 SmtUtils]: Spent 540.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-09-04 14:11:42,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:11:42,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:11:42,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 14:11:42,732 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407591390] [2020-09-04 14:11:42,732 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:11:42,732 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 14:11:42,732 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814174548] [2020-09-04 14:11:42,733 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 14:11:42,733 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:11:42,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 14:11:42,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-04 14:11:42,733 INFO L87 Difference]: Start difference. First operand 742368 states and 1135648 transitions. Second operand 5 states.