./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.8.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ae007674 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.8.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e4ea09104fdfc6025836c8ea5917b899069d556f85aa19eff5395187d58ecb3d --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-28 01:34:55,702 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-28 01:34:55,704 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-28 01:34:55,739 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-28 01:34:55,740 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-28 01:34:55,742 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-28 01:34:55,743 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-28 01:34:55,747 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-28 01:34:55,748 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-28 01:34:55,752 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-28 01:34:55,752 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-28 01:34:55,753 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-28 01:34:55,754 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-28 01:34:55,756 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-28 01:34:55,756 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-28 01:34:55,763 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-28 01:34:55,764 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-28 01:34:55,764 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-28 01:34:55,765 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-28 01:34:55,769 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-28 01:34:55,770 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-28 01:34:55,771 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-28 01:34:55,772 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-28 01:34:55,773 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-28 01:34:55,778 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-28 01:34:55,778 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-28 01:34:55,778 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-28 01:34:55,780 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-28 01:34:55,780 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-28 01:34:55,781 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-28 01:34:55,781 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-28 01:34:55,782 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-28 01:34:55,783 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-28 01:34:55,783 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-28 01:34:55,784 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-28 01:34:55,784 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-28 01:34:55,785 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-28 01:34:55,785 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-28 01:34:55,785 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-28 01:34:55,786 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-28 01:34:55,787 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-28 01:34:55,788 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-28 01:34:55,817 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-28 01:34:55,817 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-28 01:34:55,818 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-28 01:34:55,818 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-28 01:34:55,819 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-28 01:34:55,819 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-28 01:34:55,820 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-28 01:34:55,821 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-28 01:34:55,821 INFO L138 SettingsManager]: * Use SBE=true [2021-12-28 01:34:55,821 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-28 01:34:55,822 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-28 01:34:55,822 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-28 01:34:55,822 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-28 01:34:55,822 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-28 01:34:55,822 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-28 01:34:55,822 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-28 01:34:55,823 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-28 01:34:55,823 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-28 01:34:55,823 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-28 01:34:55,823 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-28 01:34:55,823 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-28 01:34:55,823 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-28 01:34:55,824 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-28 01:34:55,824 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-28 01:34:55,824 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 01:34:55,824 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-28 01:34:55,824 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-28 01:34:55,824 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-28 01:34:55,824 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-28 01:34:55,825 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-28 01:34:55,825 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-28 01:34:55,825 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-28 01:34:55,825 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-28 01:34:55,825 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e4ea09104fdfc6025836c8ea5917b899069d556f85aa19eff5395187d58ecb3d [2021-12-28 01:34:56,106 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-28 01:34:56,127 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-28 01:34:56,129 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-28 01:34:56,129 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-28 01:34:56,131 INFO L275 PluginConnector]: CDTParser initialized [2021-12-28 01:34:56,132 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.8.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2021-12-28 01:34:56,174 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/42b83704c/79c15e6093b14ac3a74158a0dd2497bf/FLAG1ad61b69b [2021-12-28 01:34:56,575 INFO L306 CDTParser]: Found 1 translation units. [2021-12-28 01:34:56,576 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.8.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2021-12-28 01:34:56,583 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/42b83704c/79c15e6093b14ac3a74158a0dd2497bf/FLAG1ad61b69b [2021-12-28 01:34:56,596 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/42b83704c/79c15e6093b14ac3a74158a0dd2497bf [2021-12-28 01:34:56,598 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-28 01:34:56,599 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-28 01:34:56,601 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-28 01:34:56,601 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-28 01:34:56,604 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-28 01:34:56,604 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 01:34:56" (1/1) ... [2021-12-28 01:34:56,605 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38740c81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:34:56, skipping insertion in model container [2021-12-28 01:34:56,605 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 01:34:56" (1/1) ... [2021-12-28 01:34:56,610 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-28 01:34:56,648 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-28 01:34:56,864 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.8.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[8640,8653] [2021-12-28 01:34:56,902 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 01:34:56,924 INFO L203 MainTranslator]: Completed pre-run [2021-12-28 01:34:56,965 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.8.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[8640,8653] [2021-12-28 01:34:56,977 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 01:34:56,988 INFO L208 MainTranslator]: Completed translation [2021-12-28 01:34:56,989 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:34:56 WrapperNode [2021-12-28 01:34:56,989 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-28 01:34:56,989 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-28 01:34:56,990 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-28 01:34:56,990 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-28 01:34:56,994 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:34:56" (1/1) ... [2021-12-28 01:34:57,013 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:34:56" (1/1) ... [2021-12-28 01:34:57,046 INFO L137 Inliner]: procedures = 28, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 657 [2021-12-28 01:34:57,046 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-28 01:34:57,047 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-28 01:34:57,047 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-28 01:34:57,047 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-28 01:34:57,052 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:34:56" (1/1) ... [2021-12-28 01:34:57,053 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:34:56" (1/1) ... [2021-12-28 01:34:57,055 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:34:56" (1/1) ... [2021-12-28 01:34:57,055 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:34:56" (1/1) ... [2021-12-28 01:34:57,060 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:34:56" (1/1) ... [2021-12-28 01:34:57,064 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:34:56" (1/1) ... [2021-12-28 01:34:57,065 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:34:56" (1/1) ... [2021-12-28 01:34:57,067 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-28 01:34:57,068 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-28 01:34:57,068 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-28 01:34:57,068 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-28 01:34:57,069 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:34:56" (1/1) ... [2021-12-28 01:34:57,073 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 01:34:57,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 01:34:57,091 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-28 01:34:57,106 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-28 01:34:57,114 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-28 01:34:57,115 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-28 01:34:57,115 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-28 01:34:57,115 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-28 01:34:57,209 INFO L234 CfgBuilder]: Building ICFG [2021-12-28 01:34:57,210 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-28 01:34:57,652 INFO L275 CfgBuilder]: Performing block encoding [2021-12-28 01:34:57,658 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-28 01:34:57,658 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-28 01:34:57,659 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 01:34:57 BoogieIcfgContainer [2021-12-28 01:34:57,659 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-28 01:34:57,661 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-28 01:34:57,661 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-28 01:34:57,663 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-28 01:34:57,663 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.12 01:34:56" (1/3) ... [2021-12-28 01:34:57,663 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d32fb91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 01:34:57, skipping insertion in model container [2021-12-28 01:34:57,663 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:34:56" (2/3) ... [2021-12-28 01:34:57,664 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d32fb91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 01:34:57, skipping insertion in model container [2021-12-28 01:34:57,664 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 01:34:57" (3/3) ... [2021-12-28 01:34:57,665 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.8.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2021-12-28 01:34:57,668 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-28 01:34:57,668 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-28 01:34:57,696 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-28 01:34:57,700 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-28 01:34:57,700 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-28 01:34:57,711 INFO L276 IsEmpty]: Start isEmpty. Operand has 159 states, 157 states have (on average 1.7515923566878981) internal successors, (275), 158 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:34:57,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-28 01:34:57,718 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:34:57,718 INFO L514 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] [2021-12-28 01:34:57,719 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:34:57,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:34:57,722 INFO L85 PathProgramCache]: Analyzing trace with hash 521817496, now seen corresponding path program 1 times [2021-12-28 01:34:57,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:34:57,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302824675] [2021-12-28 01:34:57,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:34:57,729 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:34:57,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:34:58,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:34:58,070 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:34:58,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302824675] [2021-12-28 01:34:58,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302824675] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:34:58,071 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:34:58,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:34:58,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666385776] [2021-12-28 01:34:58,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:34:58,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:34:58,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:34:58,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:34:58,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:34:58,104 INFO L87 Difference]: Start difference. First operand has 159 states, 157 states have (on average 1.7515923566878981) internal successors, (275), 158 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:34:58,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:34:58,189 INFO L93 Difference]: Finished difference Result 341 states and 560 transitions. [2021-12-28 01:34:58,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:34:58,191 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 102 [2021-12-28 01:34:58,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:34:58,204 INFO L225 Difference]: With dead ends: 341 [2021-12-28 01:34:58,205 INFO L226 Difference]: Without dead ends: 240 [2021-12-28 01:34:58,207 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:34:58,210 INFO L933 BasicCegarLoop]: 386 mSDtfsCounter, 186 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 541 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:34:58,211 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 541 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:34:58,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-12-28 01:34:58,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 238. [2021-12-28 01:34:58,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 1.4388185654008439) internal successors, (341), 237 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:34:58,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 341 transitions. [2021-12-28 01:34:58,267 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 341 transitions. Word has length 102 [2021-12-28 01:34:58,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:34:58,268 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 341 transitions. [2021-12-28 01:34:58,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:34:58,269 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 341 transitions. [2021-12-28 01:34:58,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-28 01:34:58,275 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:34:58,275 INFO L514 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] [2021-12-28 01:34:58,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-28 01:34:58,276 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:34:58,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:34:58,278 INFO L85 PathProgramCache]: Analyzing trace with hash 1097817700, now seen corresponding path program 1 times [2021-12-28 01:34:58,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:34:58,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506142052] [2021-12-28 01:34:58,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:34:58,278 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:34:58,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:34:58,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:34:58,409 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:34:58,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506142052] [2021-12-28 01:34:58,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506142052] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:34:58,410 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:34:58,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:34:58,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122892546] [2021-12-28 01:34:58,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:34:58,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:34:58,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:34:58,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:34:58,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:34:58,412 INFO L87 Difference]: Start difference. First operand 238 states and 341 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:34:58,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:34:58,433 INFO L93 Difference]: Finished difference Result 570 states and 869 transitions. [2021-12-28 01:34:58,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:34:58,434 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2021-12-28 01:34:58,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:34:58,436 INFO L225 Difference]: With dead ends: 570 [2021-12-28 01:34:58,436 INFO L226 Difference]: Without dead ends: 396 [2021-12-28 01:34:58,441 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:34:58,442 INFO L933 BasicCegarLoop]: 312 mSDtfsCounter, 126 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 461 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:34:58,442 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 461 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:34:58,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2021-12-28 01:34:58,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 394. [2021-12-28 01:34:58,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 393 states have (on average 1.4987277353689568) internal successors, (589), 393 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:34:58,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 589 transitions. [2021-12-28 01:34:58,459 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 589 transitions. Word has length 103 [2021-12-28 01:34:58,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:34:58,460 INFO L470 AbstractCegarLoop]: Abstraction has 394 states and 589 transitions. [2021-12-28 01:34:58,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:34:58,460 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 589 transitions. [2021-12-28 01:34:58,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-12-28 01:34:58,461 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:34:58,461 INFO L514 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] [2021-12-28 01:34:58,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-28 01:34:58,461 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:34:58,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:34:58,462 INFO L85 PathProgramCache]: Analyzing trace with hash 186284590, now seen corresponding path program 1 times [2021-12-28 01:34:58,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:34:58,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740701784] [2021-12-28 01:34:58,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:34:58,462 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:34:58,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:34:58,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:34:58,541 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:34:58,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740701784] [2021-12-28 01:34:58,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740701784] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:34:58,542 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:34:58,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:34:58,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245311179] [2021-12-28 01:34:58,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:34:58,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:34:58,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:34:58,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:34:58,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:34:58,545 INFO L87 Difference]: Start difference. First operand 394 states and 589 transitions. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:34:58,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:34:58,581 INFO L93 Difference]: Finished difference Result 1022 states and 1587 transitions. [2021-12-28 01:34:58,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:34:58,582 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 104 [2021-12-28 01:34:58,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:34:58,586 INFO L225 Difference]: With dead ends: 1022 [2021-12-28 01:34:58,586 INFO L226 Difference]: Without dead ends: 692 [2021-12-28 01:34:58,587 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:34:58,592 INFO L933 BasicCegarLoop]: 304 mSDtfsCounter, 121 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 457 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:34:58,593 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 457 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:34:58,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 692 states. [2021-12-28 01:34:58,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 692 to 690. [2021-12-28 01:34:58,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 690 states, 689 states have (on average 1.5341074020319303) internal successors, (1057), 689 states have internal predecessors, (1057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:34:58,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 690 states to 690 states and 1057 transitions. [2021-12-28 01:34:58,638 INFO L78 Accepts]: Start accepts. Automaton has 690 states and 1057 transitions. Word has length 104 [2021-12-28 01:34:58,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:34:58,639 INFO L470 AbstractCegarLoop]: Abstraction has 690 states and 1057 transitions. [2021-12-28 01:34:58,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:34:58,640 INFO L276 IsEmpty]: Start isEmpty. Operand 690 states and 1057 transitions. [2021-12-28 01:34:58,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-12-28 01:34:58,645 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:34:58,645 INFO L514 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] [2021-12-28 01:34:58,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-28 01:34:58,646 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:34:58,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:34:58,647 INFO L85 PathProgramCache]: Analyzing trace with hash 1107025040, now seen corresponding path program 1 times [2021-12-28 01:34:58,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:34:58,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427249229] [2021-12-28 01:34:58,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:34:58,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:34:58,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:34:58,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:34:58,739 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:34:58,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427249229] [2021-12-28 01:34:58,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427249229] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:34:58,740 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:34:58,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:34:58,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327336842] [2021-12-28 01:34:58,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:34:58,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:34:58,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:34:58,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:34:58,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:34:58,749 INFO L87 Difference]: Start difference. First operand 690 states and 1057 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:34:58,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:34:58,800 INFO L93 Difference]: Finished difference Result 1878 states and 2939 transitions. [2021-12-28 01:34:58,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:34:58,801 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-12-28 01:34:58,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:34:58,808 INFO L225 Difference]: With dead ends: 1878 [2021-12-28 01:34:58,808 INFO L226 Difference]: Without dead ends: 1252 [2021-12-28 01:34:58,809 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:34:58,812 INFO L933 BasicCegarLoop]: 296 mSDtfsCounter, 116 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:34:58,813 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 453 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:34:58,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1252 states. [2021-12-28 01:34:58,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1252 to 1250. [2021-12-28 01:34:58,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1250 states, 1249 states have (on average 1.5508406725380304) internal successors, (1937), 1249 states have internal predecessors, (1937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:34:58,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1250 states to 1250 states and 1937 transitions. [2021-12-28 01:34:58,865 INFO L78 Accepts]: Start accepts. Automaton has 1250 states and 1937 transitions. Word has length 105 [2021-12-28 01:34:58,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:34:58,865 INFO L470 AbstractCegarLoop]: Abstraction has 1250 states and 1937 transitions. [2021-12-28 01:34:58,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:34:58,865 INFO L276 IsEmpty]: Start isEmpty. Operand 1250 states and 1937 transitions. [2021-12-28 01:34:58,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-28 01:34:58,866 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:34:58,866 INFO L514 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] [2021-12-28 01:34:58,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-28 01:34:58,867 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:34:58,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:34:58,867 INFO L85 PathProgramCache]: Analyzing trace with hash 1750887068, now seen corresponding path program 1 times [2021-12-28 01:34:58,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:34:58,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622812695] [2021-12-28 01:34:58,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:34:58,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:34:58,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:34:58,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:34:58,958 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:34:58,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622812695] [2021-12-28 01:34:58,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622812695] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:34:58,959 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:34:58,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:34:58,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154013578] [2021-12-28 01:34:58,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:34:58,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:34:58,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:34:58,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:34:58,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:34:58,960 INFO L87 Difference]: Start difference. First operand 1250 states and 1937 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:34:59,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:34:59,045 INFO L93 Difference]: Finished difference Result 3494 states and 5475 transitions. [2021-12-28 01:34:59,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:34:59,046 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2021-12-28 01:34:59,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:34:59,053 INFO L225 Difference]: With dead ends: 3494 [2021-12-28 01:34:59,053 INFO L226 Difference]: Without dead ends: 2308 [2021-12-28 01:34:59,054 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:34:59,055 INFO L933 BasicCegarLoop]: 288 mSDtfsCounter, 111 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:34:59,056 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 449 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:34:59,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2308 states. [2021-12-28 01:34:59,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2308 to 2306. [2021-12-28 01:34:59,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2306 states, 2305 states have (on average 1.5553145336225596) internal successors, (3585), 2305 states have internal predecessors, (3585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:34:59,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2306 states to 2306 states and 3585 transitions. [2021-12-28 01:34:59,150 INFO L78 Accepts]: Start accepts. Automaton has 2306 states and 3585 transitions. Word has length 106 [2021-12-28 01:34:59,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:34:59,151 INFO L470 AbstractCegarLoop]: Abstraction has 2306 states and 3585 transitions. [2021-12-28 01:34:59,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:34:59,151 INFO L276 IsEmpty]: Start isEmpty. Operand 2306 states and 3585 transitions. [2021-12-28 01:34:59,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-12-28 01:34:59,152 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:34:59,152 INFO L514 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] [2021-12-28 01:34:59,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-28 01:34:59,152 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:34:59,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:34:59,153 INFO L85 PathProgramCache]: Analyzing trace with hash -67978193, now seen corresponding path program 1 times [2021-12-28 01:34:59,153 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:34:59,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680430074] [2021-12-28 01:34:59,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:34:59,154 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:34:59,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:34:59,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:34:59,200 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:34:59,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680430074] [2021-12-28 01:34:59,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680430074] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:34:59,200 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:34:59,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:34:59,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501568055] [2021-12-28 01:34:59,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:34:59,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:34:59,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:34:59,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:34:59,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:34:59,202 INFO L87 Difference]: Start difference. First operand 2306 states and 3585 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:34:59,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:34:59,357 INFO L93 Difference]: Finished difference Result 6534 states and 10211 transitions. [2021-12-28 01:34:59,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:34:59,358 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 107 [2021-12-28 01:34:59,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:34:59,370 INFO L225 Difference]: With dead ends: 6534 [2021-12-28 01:34:59,371 INFO L226 Difference]: Without dead ends: 4292 [2021-12-28 01:34:59,373 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:34:59,374 INFO L933 BasicCegarLoop]: 280 mSDtfsCounter, 106 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 445 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:34:59,374 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 445 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:34:59,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4292 states. [2021-12-28 01:34:59,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4292 to 4290. [2021-12-28 01:34:59,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4290 states, 4289 states have (on average 1.5521100489624622) internal successors, (6657), 4289 states have internal predecessors, (6657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:34:59,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4290 states to 4290 states and 6657 transitions. [2021-12-28 01:34:59,540 INFO L78 Accepts]: Start accepts. Automaton has 4290 states and 6657 transitions. Word has length 107 [2021-12-28 01:34:59,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:34:59,541 INFO L470 AbstractCegarLoop]: Abstraction has 4290 states and 6657 transitions. [2021-12-28 01:34:59,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:34:59,541 INFO L276 IsEmpty]: Start isEmpty. Operand 4290 states and 6657 transitions. [2021-12-28 01:34:59,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-12-28 01:34:59,542 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:34:59,542 INFO L514 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] [2021-12-28 01:34:59,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-28 01:34:59,542 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:34:59,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:34:59,543 INFO L85 PathProgramCache]: Analyzing trace with hash 827456551, now seen corresponding path program 1 times [2021-12-28 01:34:59,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:34:59,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967280276] [2021-12-28 01:34:59,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:34:59,543 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:34:59,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:34:59,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:34:59,583 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:34:59,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967280276] [2021-12-28 01:34:59,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967280276] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:34:59,583 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:34:59,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:34:59,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203671404] [2021-12-28 01:34:59,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:34:59,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:34:59,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:34:59,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:34:59,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:34:59,585 INFO L87 Difference]: Start difference. First operand 4290 states and 6657 transitions. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:34:59,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:34:59,870 INFO L93 Difference]: Finished difference Result 12230 states and 19011 transitions. [2021-12-28 01:34:59,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:34:59,871 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 108 [2021-12-28 01:34:59,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:34:59,894 INFO L225 Difference]: With dead ends: 12230 [2021-12-28 01:34:59,894 INFO L226 Difference]: Without dead ends: 8004 [2021-12-28 01:34:59,900 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:34:59,901 INFO L933 BasicCegarLoop]: 272 mSDtfsCounter, 101 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:34:59,901 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 441 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:34:59,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8004 states. [2021-12-28 01:35:00,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8004 to 8002. [2021-12-28 01:35:00,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8002 states, 8001 states have (on average 1.5439320084989376) internal successors, (12353), 8001 states have internal predecessors, (12353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:35:00,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8002 states to 8002 states and 12353 transitions. [2021-12-28 01:35:00,239 INFO L78 Accepts]: Start accepts. Automaton has 8002 states and 12353 transitions. Word has length 108 [2021-12-28 01:35:00,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:35:00,239 INFO L470 AbstractCegarLoop]: Abstraction has 8002 states and 12353 transitions. [2021-12-28 01:35:00,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:35:00,240 INFO L276 IsEmpty]: Start isEmpty. Operand 8002 states and 12353 transitions. [2021-12-28 01:35:00,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-12-28 01:35:00,240 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:35:00,241 INFO L514 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] [2021-12-28 01:35:00,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-28 01:35:00,241 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:35:00,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:35:00,241 INFO L85 PathProgramCache]: Analyzing trace with hash -1506711706, now seen corresponding path program 1 times [2021-12-28 01:35:00,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:35:00,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053474912] [2021-12-28 01:35:00,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:35:00,242 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:35:00,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:35:00,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:35:00,332 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:35:00,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053474912] [2021-12-28 01:35:00,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053474912] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:35:00,332 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:35:00,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-28 01:35:00,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615616204] [2021-12-28 01:35:00,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:35:00,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-28 01:35:00,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:35:00,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-28 01:35:00,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-12-28 01:35:00,334 INFO L87 Difference]: Start difference. First operand 8002 states and 12353 transitions. Second operand has 10 states, 10 states have (on average 10.9) internal successors, (109), 10 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:35:07,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:35:07,058 INFO L93 Difference]: Finished difference Result 135010 states and 208977 transitions. [2021-12-28 01:35:07,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-28 01:35:07,059 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 10.9) internal successors, (109), 10 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 109 [2021-12-28 01:35:07,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:35:07,395 INFO L225 Difference]: With dead ends: 135010 [2021-12-28 01:35:07,395 INFO L226 Difference]: Without dead ends: 127072 [2021-12-28 01:35:07,455 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2021-12-28 01:35:07,456 INFO L933 BasicCegarLoop]: 206 mSDtfsCounter, 3201 mSDsluCounter, 7450 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3201 SdHoareTripleChecker+Valid, 7656 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 01:35:07,456 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3201 Valid, 7656 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 359 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-28 01:35:07,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127072 states. [2021-12-28 01:35:09,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127072 to 15938. [2021-12-28 01:35:10,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15938 states, 15937 states have (on average 1.5300872184225387) internal successors, (24385), 15937 states have internal predecessors, (24385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:35:10,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15938 states to 15938 states and 24385 transitions. [2021-12-28 01:35:10,045 INFO L78 Accepts]: Start accepts. Automaton has 15938 states and 24385 transitions. Word has length 109 [2021-12-28 01:35:10,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:35:10,045 INFO L470 AbstractCegarLoop]: Abstraction has 15938 states and 24385 transitions. [2021-12-28 01:35:10,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.9) internal successors, (109), 10 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:35:10,046 INFO L276 IsEmpty]: Start isEmpty. Operand 15938 states and 24385 transitions. [2021-12-28 01:35:10,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-28 01:35:10,046 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:35:10,047 INFO L514 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] [2021-12-28 01:35:10,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-28 01:35:10,047 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:35:10,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:35:10,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1467787422, now seen corresponding path program 1 times [2021-12-28 01:35:10,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:35:10,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622329847] [2021-12-28 01:35:10,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:35:10,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:35:10,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:35:10,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:35:10,103 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:35:10,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622329847] [2021-12-28 01:35:10,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622329847] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:35:10,103 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:35:10,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:35:10,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312877740] [2021-12-28 01:35:10,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:35:10,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:35:10,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:35:10,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:35:10,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:35:10,105 INFO L87 Difference]: Start difference. First operand 15938 states and 24385 transitions. Second operand has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:35:13,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:35:13,499 INFO L93 Difference]: Finished difference Result 46278 states and 70595 transitions. [2021-12-28 01:35:13,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:35:13,499 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2021-12-28 01:35:13,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:35:13,555 INFO L225 Difference]: With dead ends: 46278 [2021-12-28 01:35:13,555 INFO L226 Difference]: Without dead ends: 30404 [2021-12-28 01:35:13,574 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:35:13,575 INFO L933 BasicCegarLoop]: 208 mSDtfsCounter, 91 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:35:13,575 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 347 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:35:13,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30404 states. [2021-12-28 01:35:16,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30404 to 30146. [2021-12-28 01:35:16,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30146 states, 30145 states have (on average 1.505291093050257) internal successors, (45377), 30145 states have internal predecessors, (45377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:35:16,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30146 states to 30146 states and 45377 transitions. [2021-12-28 01:35:16,476 INFO L78 Accepts]: Start accepts. Automaton has 30146 states and 45377 transitions. Word has length 111 [2021-12-28 01:35:16,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:35:16,477 INFO L470 AbstractCegarLoop]: Abstraction has 30146 states and 45377 transitions. [2021-12-28 01:35:16,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:35:16,477 INFO L276 IsEmpty]: Start isEmpty. Operand 30146 states and 45377 transitions. [2021-12-28 01:35:16,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-28 01:35:16,478 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:35:16,478 INFO L514 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] [2021-12-28 01:35:16,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-28 01:35:16,479 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:35:16,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:35:16,479 INFO L85 PathProgramCache]: Analyzing trace with hash -1446784767, now seen corresponding path program 1 times [2021-12-28 01:35:16,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:35:16,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769568659] [2021-12-28 01:35:16,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:35:16,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:35:16,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:35:16,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:35:16,757 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:35:16,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769568659] [2021-12-28 01:35:16,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769568659] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:35:16,758 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:35:16,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-28 01:35:16,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656877636] [2021-12-28 01:35:16,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:35:16,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-28 01:35:16,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:35:16,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-28 01:35:16,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-12-28 01:35:16,759 INFO L87 Difference]: Start difference. First operand 30146 states and 45377 transitions. Second operand has 10 states, 10 states have (on average 11.1) internal successors, (111), 10 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:35:20,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:35:20,229 INFO L93 Difference]: Finished difference Result 60230 states and 90691 transitions. [2021-12-28 01:35:20,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-28 01:35:20,230 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 11.1) internal successors, (111), 10 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2021-12-28 01:35:20,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:35:20,292 INFO L225 Difference]: With dead ends: 60230 [2021-12-28 01:35:20,292 INFO L226 Difference]: Without dead ends: 30148 [2021-12-28 01:35:20,331 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-12-28 01:35:20,332 INFO L933 BasicCegarLoop]: 200 mSDtfsCounter, 1345 mSDsluCounter, 1004 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1345 SdHoareTripleChecker+Valid, 1204 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 01:35:20,333 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1345 Valid, 1204 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 01:35:20,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30148 states. [2021-12-28 01:35:23,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30148 to 30146. [2021-12-28 01:35:23,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30146 states, 30145 states have (on average 1.4967988057721016) internal successors, (45121), 30145 states have internal predecessors, (45121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:35:23,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30146 states to 30146 states and 45121 transitions. [2021-12-28 01:35:23,593 INFO L78 Accepts]: Start accepts. Automaton has 30146 states and 45121 transitions. Word has length 111 [2021-12-28 01:35:23,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:35:23,593 INFO L470 AbstractCegarLoop]: Abstraction has 30146 states and 45121 transitions. [2021-12-28 01:35:23,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.1) internal successors, (111), 10 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:35:23,593 INFO L276 IsEmpty]: Start isEmpty. Operand 30146 states and 45121 transitions. [2021-12-28 01:35:23,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-28 01:35:23,594 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:35:23,594 INFO L514 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] [2021-12-28 01:35:23,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-28 01:35:23,595 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:35:23,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:35:23,595 INFO L85 PathProgramCache]: Analyzing trace with hash 2102573667, now seen corresponding path program 1 times [2021-12-28 01:35:23,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:35:23,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838335298] [2021-12-28 01:35:23,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:35:23,596 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:35:23,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:35:23,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:35:23,632 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:35:23,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838335298] [2021-12-28 01:35:23,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838335298] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:35:23,633 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:35:23,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:35:23,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354331075] [2021-12-28 01:35:23,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:35:23,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:35:23,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:35:23,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:35:23,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:35:23,634 INFO L87 Difference]: Start difference. First operand 30146 states and 45121 transitions. Second operand has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:35:27,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:35:27,722 INFO L93 Difference]: Finished difference Result 59337 states and 89415 transitions. [2021-12-28 01:35:27,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:35:27,723 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2021-12-28 01:35:27,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:35:27,790 INFO L225 Difference]: With dead ends: 59337 [2021-12-28 01:35:27,790 INFO L226 Difference]: Without dead ends: 43462 [2021-12-28 01:35:27,805 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:35:27,806 INFO L933 BasicCegarLoop]: 332 mSDtfsCounter, 133 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:35:27,806 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 473 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:35:27,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43462 states. [2021-12-28 01:35:32,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43462 to 43460. [2021-12-28 01:35:32,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43460 states, 43459 states have (on average 1.4948112013622035) internal successors, (64963), 43459 states have internal predecessors, (64963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:35:32,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43460 states to 43460 states and 64963 transitions. [2021-12-28 01:35:32,142 INFO L78 Accepts]: Start accepts. Automaton has 43460 states and 64963 transitions. Word has length 112 [2021-12-28 01:35:32,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:35:32,142 INFO L470 AbstractCegarLoop]: Abstraction has 43460 states and 64963 transitions. [2021-12-28 01:35:32,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:35:32,142 INFO L276 IsEmpty]: Start isEmpty. Operand 43460 states and 64963 transitions. [2021-12-28 01:35:32,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-28 01:35:32,143 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:35:32,143 INFO L514 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] [2021-12-28 01:35:32,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-28 01:35:32,143 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:35:32,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:35:32,143 INFO L85 PathProgramCache]: Analyzing trace with hash -1902564040, now seen corresponding path program 1 times [2021-12-28 01:35:32,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:35:32,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600959850] [2021-12-28 01:35:32,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:35:32,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:35:32,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:35:32,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:35:32,187 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:35:32,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600959850] [2021-12-28 01:35:32,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600959850] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:35:32,187 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:35:32,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 01:35:32,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187228201] [2021-12-28 01:35:32,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:35:32,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 01:35:32,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:35:32,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 01:35:32,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 01:35:32,189 INFO L87 Difference]: Start difference. First operand 43460 states and 64963 transitions. Second operand has 5 states, 5 states have (on average 22.4) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:35:39,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:35:39,730 INFO L93 Difference]: Finished difference Result 116040 states and 173893 transitions. [2021-12-28 01:35:39,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 01:35:39,730 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.4) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2021-12-28 01:35:39,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:35:39,859 INFO L225 Difference]: With dead ends: 116040 [2021-12-28 01:35:39,860 INFO L226 Difference]: Without dead ends: 72646 [2021-12-28 01:35:39,904 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-28 01:35:39,905 INFO L933 BasicCegarLoop]: 132 mSDtfsCounter, 839 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 839 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 01:35:39,905 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [839 Valid, 213 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 01:35:39,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72646 states. [2021-12-28 01:35:48,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72646 to 72644. [2021-12-28 01:35:48,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72644 states, 72643 states have (on average 1.493371694450945) internal successors, (108483), 72643 states have internal predecessors, (108483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:35:48,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72644 states to 72644 states and 108483 transitions. [2021-12-28 01:35:48,451 INFO L78 Accepts]: Start accepts. Automaton has 72644 states and 108483 transitions. Word has length 112 [2021-12-28 01:35:48,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:35:48,451 INFO L470 AbstractCegarLoop]: Abstraction has 72644 states and 108483 transitions. [2021-12-28 01:35:48,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.4) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:35:48,451 INFO L276 IsEmpty]: Start isEmpty. Operand 72644 states and 108483 transitions. [2021-12-28 01:35:48,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-28 01:35:48,452 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:35:48,452 INFO L514 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] [2021-12-28 01:35:48,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-28 01:35:48,452 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:35:48,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:35:48,453 INFO L85 PathProgramCache]: Analyzing trace with hash -156137379, now seen corresponding path program 1 times [2021-12-28 01:35:48,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:35:48,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317265420] [2021-12-28 01:35:48,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:35:48,453 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:35:48,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:35:48,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:35:48,504 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:35:48,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317265420] [2021-12-28 01:35:48,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317265420] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:35:48,505 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:35:48,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 01:35:48,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266770403] [2021-12-28 01:35:48,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:35:48,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 01:35:48,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:35:48,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 01:35:48,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 01:35:48,506 INFO L87 Difference]: Start difference. First operand 72644 states and 108483 transitions. Second operand has 5 states, 5 states have (on average 22.4) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:35:56,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:35:56,936 INFO L93 Difference]: Finished difference Result 145222 states and 216900 transitions. [2021-12-28 01:35:56,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 01:35:56,942 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.4) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2021-12-28 01:35:56,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:35:57,066 INFO L225 Difference]: With dead ends: 145222 [2021-12-28 01:35:57,066 INFO L226 Difference]: Without dead ends: 72644 [2021-12-28 01:35:57,121 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-28 01:35:57,121 INFO L933 BasicCegarLoop]: 132 mSDtfsCounter, 498 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 498 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:35:57,121 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [498 Valid, 168 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:35:57,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72644 states. [2021-12-28 01:36:05,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72644 to 72644. [2021-12-28 01:36:05,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72644 states, 72643 states have (on average 1.484561485621464) internal successors, (107843), 72643 states have internal predecessors, (107843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:36:06,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72644 states to 72644 states and 107843 transitions. [2021-12-28 01:36:06,220 INFO L78 Accepts]: Start accepts. Automaton has 72644 states and 107843 transitions. Word has length 112 [2021-12-28 01:36:06,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:36:06,221 INFO L470 AbstractCegarLoop]: Abstraction has 72644 states and 107843 transitions. [2021-12-28 01:36:06,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.4) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:36:06,221 INFO L276 IsEmpty]: Start isEmpty. Operand 72644 states and 107843 transitions. [2021-12-28 01:36:06,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-28 01:36:06,221 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:36:06,221 INFO L514 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] [2021-12-28 01:36:06,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-28 01:36:06,222 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:36:06,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:36:06,222 INFO L85 PathProgramCache]: Analyzing trace with hash -919001086, now seen corresponding path program 1 times [2021-12-28 01:36:06,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:36:06,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124154131] [2021-12-28 01:36:06,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:36:06,223 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:36:06,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:36:06,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:36:06,275 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:36:06,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124154131] [2021-12-28 01:36:06,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124154131] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:36:06,275 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:36:06,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 01:36:06,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863285750] [2021-12-28 01:36:06,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:36:06,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 01:36:06,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:36:06,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 01:36:06,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 01:36:06,276 INFO L87 Difference]: Start difference. First operand 72644 states and 107843 transitions. Second operand has 5 states, 5 states have (on average 22.4) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)