./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 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/pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.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 308b0e1adc3ae7348985993203af7f0b3a83352e3d43ffbdb40ed727e63d4081 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 13:28:22,766 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 13:28:22,767 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 13:28:22,813 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 13:28:22,814 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 13:28:22,815 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 13:28:22,817 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 13:28:22,820 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 13:28:22,821 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 13:28:22,822 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 13:28:22,823 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 13:28:22,825 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 13:28:22,825 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 13:28:22,828 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 13:28:22,829 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 13:28:22,830 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 13:28:22,831 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 13:28:22,833 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 13:28:22,833 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 13:28:22,840 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 13:28:22,842 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 13:28:22,843 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 13:28:22,843 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 13:28:22,844 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 13:28:22,846 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 13:28:22,848 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 13:28:22,848 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 13:28:22,849 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 13:28:22,849 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 13:28:22,850 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 13:28:22,850 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 13:28:22,851 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 13:28:22,851 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 13:28:22,852 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 13:28:22,853 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 13:28:22,854 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 13:28:22,854 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 13:28:22,855 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 13:28:22,855 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 13:28:22,855 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 13:28:22,856 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 13:28:22,857 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 13:28:22,880 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 13:28:22,881 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 13:28:22,882 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 13:28:22,882 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 13:28:22,882 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 13:28:22,883 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 13:28:22,883 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 13:28:22,883 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 13:28:22,883 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 13:28:22,884 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 13:28:22,884 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 13:28:22,884 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 13:28:22,884 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 13:28:22,885 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 13:28:22,885 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 13:28:22,885 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 13:28:22,885 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 13:28:22,885 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 13:28:22,885 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 13:28:22,885 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 13:28:22,885 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 13:28:22,886 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 13:28:22,886 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 13:28:22,886 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 13:28:22,886 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 13:28:22,886 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 13:28:22,886 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 13:28:22,887 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 13:28:22,887 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 13:28:22,887 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 13:28:22,888 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 13:28:22,888 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 13:28:22,888 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 13:28:22,888 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 13:28:22,888 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 308b0e1adc3ae7348985993203af7f0b3a83352e3d43ffbdb40ed727e63d4081 [2021-12-21 13:28:23,107 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 13:28:23,125 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 13:28:23,127 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 13:28:23,128 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 13:28:23,129 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 13:28:23,130 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c [2021-12-21 13:28:23,191 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c8a2adbb6/fa21c1635ea94502abac15b0f79b7561/FLAGed213736e [2021-12-21 13:28:23,613 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 13:28:23,615 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c [2021-12-21 13:28:23,626 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c8a2adbb6/fa21c1635ea94502abac15b0f79b7561/FLAGed213736e [2021-12-21 13:28:23,640 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c8a2adbb6/fa21c1635ea94502abac15b0f79b7561 [2021-12-21 13:28:23,642 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 13:28:23,644 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 13:28:23,647 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 13:28:23,647 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 13:28:23,650 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 13:28:23,651 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 01:28:23" (1/1) ... [2021-12-21 13:28:23,651 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e1c6ff3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:28:23, skipping insertion in model container [2021-12-21 13:28:23,652 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 01:28:23" (1/1) ... [2021-12-21 13:28:23,656 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 13:28:23,692 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 13:28:23,910 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/pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c[9433,9446] [2021-12-21 13:28:23,912 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 13:28:23,919 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 13:28:23,965 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/pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c[9433,9446] [2021-12-21 13:28:23,967 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 13:28:23,982 INFO L208 MainTranslator]: Completed translation [2021-12-21 13:28:23,982 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:28:23 WrapperNode [2021-12-21 13:28:23,983 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 13:28:23,983 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 13:28:23,983 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 13:28:23,984 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 13:28:23,988 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:28:23" (1/1) ... [2021-12-21 13:28:23,996 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:28:23" (1/1) ... [2021-12-21 13:28:24,020 INFO L137 Inliner]: procedures = 22, calls = 14, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 320 [2021-12-21 13:28:24,021 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 13:28:24,021 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 13:28:24,022 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 13:28:24,022 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 13:28:24,027 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:28:23" (1/1) ... [2021-12-21 13:28:24,028 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:28:23" (1/1) ... [2021-12-21 13:28:24,029 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:28:23" (1/1) ... [2021-12-21 13:28:24,030 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:28:23" (1/1) ... [2021-12-21 13:28:24,033 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:28:23" (1/1) ... [2021-12-21 13:28:24,052 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:28:23" (1/1) ... [2021-12-21 13:28:24,053 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:28:23" (1/1) ... [2021-12-21 13:28:24,056 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 13:28:24,056 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 13:28:24,057 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 13:28:24,057 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 13:28:24,058 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:28:23" (1/1) ... [2021-12-21 13:28:24,073 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 13:28:24,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 13:28:24,089 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) [2021-12-21 13:28:24,095 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 [2021-12-21 13:28:24,121 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 13:28:24,122 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 13:28:24,122 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 13:28:24,122 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 13:28:24,201 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 13:28:24,203 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 13:28:24,553 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 13:28:24,563 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 13:28:24,564 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-21 13:28:24,566 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 01:28:24 BoogieIcfgContainer [2021-12-21 13:28:24,566 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 13:28:24,568 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 13:28:24,568 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 13:28:24,572 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 13:28:24,572 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 01:28:23" (1/3) ... [2021-12-21 13:28:24,573 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77f1fef5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 01:28:24, skipping insertion in model container [2021-12-21 13:28:24,573 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:28:23" (2/3) ... [2021-12-21 13:28:24,573 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77f1fef5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 01:28:24, skipping insertion in model container [2021-12-21 13:28:24,573 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 01:28:24" (3/3) ... [2021-12-21 13:28:24,575 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c [2021-12-21 13:28:24,579 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 13:28:24,580 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 13:28:24,623 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 13:28:24,628 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 [2021-12-21 13:28:24,628 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 13:28:24,639 INFO L276 IsEmpty]: Start isEmpty. Operand has 100 states, 98 states have (on average 1.6938775510204083) internal successors, (166), 99 states have internal predecessors, (166), 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) [2021-12-21 13:28:24,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-21 13:28:24,644 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:28:24,645 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] [2021-12-21 13:28:24,645 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:28:24,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:28:24,649 INFO L85 PathProgramCache]: Analyzing trace with hash -2019613380, now seen corresponding path program 1 times [2021-12-21 13:28:24,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:28:24,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334667391] [2021-12-21 13:28:24,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:28:24,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:28:24,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:28:24,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:28:24,809 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:28:24,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334667391] [2021-12-21 13:28:24,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334667391] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:28:24,810 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:28:24,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 13:28:24,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181181623] [2021-12-21 13:28:24,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:28:24,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-21 13:28:24,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:28:24,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-21 13:28:24,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-21 13:28:24,857 INFO L87 Difference]: Start difference. First operand has 100 states, 98 states have (on average 1.6938775510204083) internal successors, (166), 99 states have internal predecessors, (166), 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 2 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 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) [2021-12-21 13:28:24,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:28:24,890 INFO L93 Difference]: Finished difference Result 171 states and 278 transitions. [2021-12-21 13:28:24,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-21 13:28:24,892 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 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 29 [2021-12-21 13:28:24,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:28:24,901 INFO L225 Difference]: With dead ends: 171 [2021-12-21 13:28:24,901 INFO L226 Difference]: Without dead ends: 96 [2021-12-21 13:28:24,907 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-21 13:28:24,910 INFO L933 BasicCegarLoop]: 163 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:28:24,911 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:28:24,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-12-21 13:28:24,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2021-12-21 13:28:24,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.6736842105263159) internal successors, (159), 95 states have internal predecessors, (159), 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) [2021-12-21 13:28:24,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 159 transitions. [2021-12-21 13:28:24,951 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 159 transitions. Word has length 29 [2021-12-21 13:28:24,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:28:24,952 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 159 transitions. [2021-12-21 13:28:24,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 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) [2021-12-21 13:28:24,952 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 159 transitions. [2021-12-21 13:28:24,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-21 13:28:24,955 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:28:24,955 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] [2021-12-21 13:28:24,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 13:28:24,956 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:28:24,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:28:24,958 INFO L85 PathProgramCache]: Analyzing trace with hash 2141340410, now seen corresponding path program 1 times [2021-12-21 13:28:24,958 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:28:24,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948574218] [2021-12-21 13:28:24,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:28:24,959 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:28:25,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:28:25,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:28:25,061 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:28:25,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948574218] [2021-12-21 13:28:25,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948574218] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:28:25,061 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:28:25,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 13:28:25,062 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544718025] [2021-12-21 13:28:25,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:28:25,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 13:28:25,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:28:25,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 13:28:25,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 13:28:25,065 INFO L87 Difference]: Start difference. First operand 96 states and 159 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 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) [2021-12-21 13:28:25,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:28:25,144 INFO L93 Difference]: Finished difference Result 232 states and 373 transitions. [2021-12-21 13:28:25,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 13:28:25,145 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 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 29 [2021-12-21 13:28:25,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:28:25,149 INFO L225 Difference]: With dead ends: 232 [2021-12-21 13:28:25,150 INFO L226 Difference]: Without dead ends: 162 [2021-12-21 13:28:25,153 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-21 13:28:25,154 INFO L933 BasicCegarLoop]: 155 mSDtfsCounter, 107 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:28:25,154 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 591 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:28:25,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-12-21 13:28:25,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 96. [2021-12-21 13:28:25,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.4210526315789473) internal successors, (135), 95 states have internal predecessors, (135), 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) [2021-12-21 13:28:25,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 135 transitions. [2021-12-21 13:28:25,165 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 135 transitions. Word has length 29 [2021-12-21 13:28:25,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:28:25,165 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 135 transitions. [2021-12-21 13:28:25,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 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) [2021-12-21 13:28:25,166 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 135 transitions. [2021-12-21 13:28:25,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-21 13:28:25,171 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:28:25,171 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] [2021-12-21 13:28:25,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 13:28:25,172 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:28:25,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:28:25,173 INFO L85 PathProgramCache]: Analyzing trace with hash -1164590349, now seen corresponding path program 1 times [2021-12-21 13:28:25,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:28:25,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366209892] [2021-12-21 13:28:25,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:28:25,174 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:28:25,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:28:25,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:28:25,281 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:28:25,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366209892] [2021-12-21 13:28:25,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366209892] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:28:25,282 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:28:25,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:28:25,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982508577] [2021-12-21 13:28:25,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:28:25,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:28:25,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:28:25,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:28:25,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:28:25,285 INFO L87 Difference]: Start difference. First operand 96 states and 135 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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) [2021-12-21 13:28:25,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:28:25,302 INFO L93 Difference]: Finished difference Result 216 states and 325 transitions. [2021-12-21 13:28:25,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:28:25,302 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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 52 [2021-12-21 13:28:25,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:28:25,304 INFO L225 Difference]: With dead ends: 216 [2021-12-21 13:28:25,304 INFO L226 Difference]: Without dead ends: 150 [2021-12-21 13:28:25,304 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 [2021-12-21 13:28:25,309 INFO L933 BasicCegarLoop]: 216 mSDtfsCounter, 93 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 312 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 [2021-12-21 13:28:25,310 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 312 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:28:25,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-12-21 13:28:25,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 148. [2021-12-21 13:28:25,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.4829931972789117) internal successors, (218), 147 states have internal predecessors, (218), 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) [2021-12-21 13:28:25,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 218 transitions. [2021-12-21 13:28:25,321 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 218 transitions. Word has length 52 [2021-12-21 13:28:25,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:28:25,322 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 218 transitions. [2021-12-21 13:28:25,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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) [2021-12-21 13:28:25,322 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 218 transitions. [2021-12-21 13:28:25,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-21 13:28:25,323 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:28:25,323 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] [2021-12-21 13:28:25,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 13:28:25,323 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:28:25,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:28:25,324 INFO L85 PathProgramCache]: Analyzing trace with hash 502679627, now seen corresponding path program 1 times [2021-12-21 13:28:25,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:28:25,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377359491] [2021-12-21 13:28:25,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:28:25,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:28:25,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:28:25,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:28:25,377 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:28:25,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377359491] [2021-12-21 13:28:25,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377359491] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:28:25,378 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:28:25,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:28:25,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364637980] [2021-12-21 13:28:25,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:28:25,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:28:25,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:28:25,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:28:25,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:28:25,380 INFO L87 Difference]: Start difference. First operand 148 states and 218 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 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) [2021-12-21 13:28:25,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:28:25,392 INFO L93 Difference]: Finished difference Result 360 states and 554 transitions. [2021-12-21 13:28:25,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:28:25,392 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 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 53 [2021-12-21 13:28:25,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:28:25,394 INFO L225 Difference]: With dead ends: 360 [2021-12-21 13:28:25,394 INFO L226 Difference]: Without dead ends: 242 [2021-12-21 13:28:25,394 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 [2021-12-21 13:28:25,395 INFO L933 BasicCegarLoop]: 203 mSDtfsCounter, 88 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 303 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 [2021-12-21 13:28:25,395 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 303 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:28:25,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-12-21 13:28:25,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 240. [2021-12-21 13:28:25,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 1.5188284518828452) internal successors, (363), 239 states have internal predecessors, (363), 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) [2021-12-21 13:28:25,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 363 transitions. [2021-12-21 13:28:25,408 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 363 transitions. Word has length 53 [2021-12-21 13:28:25,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:28:25,408 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 363 transitions. [2021-12-21 13:28:25,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 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) [2021-12-21 13:28:25,409 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 363 transitions. [2021-12-21 13:28:25,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-21 13:28:25,410 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:28:25,410 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] [2021-12-21 13:28:25,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-21 13:28:25,411 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:28:25,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:28:25,411 INFO L85 PathProgramCache]: Analyzing trace with hash 1405286019, now seen corresponding path program 1 times [2021-12-21 13:28:25,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:28:25,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631807684] [2021-12-21 13:28:25,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:28:25,412 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:28:25,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:28:25,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:28:25,466 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:28:25,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631807684] [2021-12-21 13:28:25,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631807684] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:28:25,467 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:28:25,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:28:25,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076550331] [2021-12-21 13:28:25,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:28:25,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:28:25,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:28:25,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:28:25,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:28:25,469 INFO L87 Difference]: Start difference. First operand 240 states and 363 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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) [2021-12-21 13:28:25,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:28:25,507 INFO L93 Difference]: Finished difference Result 612 states and 949 transitions. [2021-12-21 13:28:25,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:28:25,507 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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 54 [2021-12-21 13:28:25,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:28:25,510 INFO L225 Difference]: With dead ends: 612 [2021-12-21 13:28:25,510 INFO L226 Difference]: Without dead ends: 402 [2021-12-21 13:28:25,512 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 [2021-12-21 13:28:25,512 INFO L933 BasicCegarLoop]: 190 mSDtfsCounter, 83 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 294 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 [2021-12-21 13:28:25,513 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 294 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:28:25,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2021-12-21 13:28:25,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 400. [2021-12-21 13:28:25,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 1.531328320802005) internal successors, (611), 399 states have internal predecessors, (611), 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) [2021-12-21 13:28:25,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 611 transitions. [2021-12-21 13:28:25,534 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 611 transitions. Word has length 54 [2021-12-21 13:28:25,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:28:25,534 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 611 transitions. [2021-12-21 13:28:25,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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) [2021-12-21 13:28:25,536 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 611 transitions. [2021-12-21 13:28:25,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-21 13:28:25,538 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:28:25,538 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] [2021-12-21 13:28:25,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-21 13:28:25,539 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:28:25,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:28:25,539 INFO L85 PathProgramCache]: Analyzing trace with hash 417554395, now seen corresponding path program 1 times [2021-12-21 13:28:25,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:28:25,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033008516] [2021-12-21 13:28:25,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:28:25,543 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:28:25,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:28:25,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:28:25,588 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:28:25,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033008516] [2021-12-21 13:28:25,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033008516] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:28:25,588 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:28:25,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:28:25,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936503722] [2021-12-21 13:28:25,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:28:25,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:28:25,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:28:25,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:28:25,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:28:25,592 INFO L87 Difference]: Start difference. First operand 400 states and 611 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 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) [2021-12-21 13:28:25,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:28:25,610 INFO L93 Difference]: Finished difference Result 1044 states and 1613 transitions. [2021-12-21 13:28:25,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:28:25,610 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 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 55 [2021-12-21 13:28:25,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:28:25,612 INFO L225 Difference]: With dead ends: 1044 [2021-12-21 13:28:25,612 INFO L226 Difference]: Without dead ends: 674 [2021-12-21 13:28:25,613 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 [2021-12-21 13:28:25,613 INFO L933 BasicCegarLoop]: 177 mSDtfsCounter, 78 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 285 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 [2021-12-21 13:28:25,614 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 285 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:28:25,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2021-12-21 13:28:25,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 672. [2021-12-21 13:28:25,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 672 states, 671 states have (on average 1.5245901639344261) internal successors, (1023), 671 states have internal predecessors, (1023), 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) [2021-12-21 13:28:25,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 672 states to 672 states and 1023 transitions. [2021-12-21 13:28:25,629 INFO L78 Accepts]: Start accepts. Automaton has 672 states and 1023 transitions. Word has length 55 [2021-12-21 13:28:25,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:28:25,629 INFO L470 AbstractCegarLoop]: Abstraction has 672 states and 1023 transitions. [2021-12-21 13:28:25,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 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) [2021-12-21 13:28:25,629 INFO L276 IsEmpty]: Start isEmpty. Operand 672 states and 1023 transitions. [2021-12-21 13:28:25,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-21 13:28:25,630 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:28:25,630 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] [2021-12-21 13:28:25,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-21 13:28:25,630 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:28:25,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:28:25,631 INFO L85 PathProgramCache]: Analyzing trace with hash -368690669, now seen corresponding path program 1 times [2021-12-21 13:28:25,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:28:25,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501042504] [2021-12-21 13:28:25,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:28:25,631 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:28:25,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:28:25,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:28:25,678 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:28:25,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501042504] [2021-12-21 13:28:25,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501042504] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:28:25,679 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:28:25,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 13:28:25,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645947942] [2021-12-21 13:28:25,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:28:25,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 13:28:25,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:28:25,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 13:28:25,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-21 13:28:25,680 INFO L87 Difference]: Start difference. First operand 672 states and 1023 transitions. Second operand has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 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) [2021-12-21 13:28:25,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:28:25,823 INFO L93 Difference]: Finished difference Result 3882 states and 5988 transitions. [2021-12-21 13:28:25,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 13:28:25,823 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 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 56 [2021-12-21 13:28:25,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:28:25,832 INFO L225 Difference]: With dead ends: 3882 [2021-12-21 13:28:25,832 INFO L226 Difference]: Without dead ends: 3240 [2021-12-21 13:28:25,834 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-21 13:28:25,834 INFO L933 BasicCegarLoop]: 133 mSDtfsCounter, 839 mSDsluCounter, 895 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 839 SdHoareTripleChecker+Valid, 1028 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:28:25,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [839 Valid, 1028 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:28:25,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3240 states. [2021-12-21 13:28:25,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3240 to 1312. [2021-12-21 13:28:25,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1312 states, 1311 states have (on average 1.5125858123569793) internal successors, (1983), 1311 states have internal predecessors, (1983), 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) [2021-12-21 13:28:25,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1312 states to 1312 states and 1983 transitions. [2021-12-21 13:28:25,899 INFO L78 Accepts]: Start accepts. Automaton has 1312 states and 1983 transitions. Word has length 56 [2021-12-21 13:28:25,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:28:25,899 INFO L470 AbstractCegarLoop]: Abstraction has 1312 states and 1983 transitions. [2021-12-21 13:28:25,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 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) [2021-12-21 13:28:25,900 INFO L276 IsEmpty]: Start isEmpty. Operand 1312 states and 1983 transitions. [2021-12-21 13:28:25,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-21 13:28:25,900 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:28:25,900 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] [2021-12-21 13:28:25,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-21 13:28:25,901 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:28:25,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:28:25,901 INFO L85 PathProgramCache]: Analyzing trace with hash 1072167829, now seen corresponding path program 1 times [2021-12-21 13:28:25,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:28:25,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543967564] [2021-12-21 13:28:25,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:28:25,902 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:28:25,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:28:25,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:28:25,983 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:28:25,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543967564] [2021-12-21 13:28:25,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543967564] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:28:25,983 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:28:25,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 13:28:25,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689410285] [2021-12-21 13:28:25,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:28:25,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 13:28:25,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:28:25,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 13:28:25,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-12-21 13:28:25,985 INFO L87 Difference]: Start difference. First operand 1312 states and 1983 transitions. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 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) [2021-12-21 13:28:26,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:28:26,236 INFO L93 Difference]: Finished difference Result 5864 states and 8803 transitions. [2021-12-21 13:28:26,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 13:28:26,237 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 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 57 [2021-12-21 13:28:26,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:28:26,248 INFO L225 Difference]: With dead ends: 5864 [2021-12-21 13:28:26,248 INFO L226 Difference]: Without dead ends: 4582 [2021-12-21 13:28:26,249 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-12-21 13:28:26,250 INFO L933 BasicCegarLoop]: 207 mSDtfsCounter, 453 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 453 SdHoareTripleChecker+Valid, 556 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:28:26,250 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [453 Valid, 556 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:28:26,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4582 states. [2021-12-21 13:28:26,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4582 to 4576. [2021-12-21 13:28:26,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4576 states, 4575 states have (on average 1.4896174863387979) internal successors, (6815), 4575 states have internal predecessors, (6815), 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) [2021-12-21 13:28:26,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4576 states to 4576 states and 6815 transitions. [2021-12-21 13:28:26,473 INFO L78 Accepts]: Start accepts. Automaton has 4576 states and 6815 transitions. Word has length 57 [2021-12-21 13:28:26,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:28:26,473 INFO L470 AbstractCegarLoop]: Abstraction has 4576 states and 6815 transitions. [2021-12-21 13:28:26,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 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) [2021-12-21 13:28:26,474 INFO L276 IsEmpty]: Start isEmpty. Operand 4576 states and 6815 transitions. [2021-12-21 13:28:26,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-21 13:28:26,474 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:28:26,474 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] [2021-12-21 13:28:26,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-21 13:28:26,474 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:28:26,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:28:26,479 INFO L85 PathProgramCache]: Analyzing trace with hash 1541080392, now seen corresponding path program 1 times [2021-12-21 13:28:26,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:28:26,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588474606] [2021-12-21 13:28:26,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:28:26,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:28:26,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:28:26,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:28:26,543 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:28:26,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588474606] [2021-12-21 13:28:26,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588474606] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:28:26,543 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:28:26,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 13:28:26,544 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383031697] [2021-12-21 13:28:26,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:28:26,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 13:28:26,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:28:26,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 13:28:26,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 13:28:26,545 INFO L87 Difference]: Start difference. First operand 4576 states and 6815 transitions. Second operand has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 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) [2021-12-21 13:28:26,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:28:26,961 INFO L93 Difference]: Finished difference Result 9634 states and 14112 transitions. [2021-12-21 13:28:26,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 13:28:26,961 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 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 58 [2021-12-21 13:28:26,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:28:26,985 INFO L225 Difference]: With dead ends: 9634 [2021-12-21 13:28:26,986 INFO L226 Difference]: Without dead ends: 9632 [2021-12-21 13:28:26,987 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-21 13:28:26,988 INFO L933 BasicCegarLoop]: 189 mSDtfsCounter, 294 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 588 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:28:26,988 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 588 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:28:26,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9632 states. [2021-12-21 13:28:27,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9632 to 4960. [2021-12-21 13:28:27,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4960 states, 4959 states have (on average 1.451703972575116) internal successors, (7199), 4959 states have internal predecessors, (7199), 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) [2021-12-21 13:28:27,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4960 states to 4960 states and 7199 transitions. [2021-12-21 13:28:27,252 INFO L78 Accepts]: Start accepts. Automaton has 4960 states and 7199 transitions. Word has length 58 [2021-12-21 13:28:27,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:28:27,252 INFO L470 AbstractCegarLoop]: Abstraction has 4960 states and 7199 transitions. [2021-12-21 13:28:27,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 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) [2021-12-21 13:28:27,253 INFO L276 IsEmpty]: Start isEmpty. Operand 4960 states and 7199 transitions. [2021-12-21 13:28:27,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-21 13:28:27,253 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:28:27,253 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] [2021-12-21 13:28:27,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-21 13:28:27,254 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:28:27,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:28:27,254 INFO L85 PathProgramCache]: Analyzing trace with hash 581430488, now seen corresponding path program 1 times [2021-12-21 13:28:27,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:28:27,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109054212] [2021-12-21 13:28:27,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:28:27,255 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:28:27,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:28:27,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:28:27,275 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:28:27,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109054212] [2021-12-21 13:28:27,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109054212] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:28:27,275 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:28:27,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:28:27,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368582975] [2021-12-21 13:28:27,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:28:27,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:28:27,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:28:27,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:28:27,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:28:27,277 INFO L87 Difference]: Start difference. First operand 4960 states and 7199 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 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) [2021-12-21 13:28:27,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:28:27,610 INFO L93 Difference]: Finished difference Result 11966 states and 17395 transitions. [2021-12-21 13:28:27,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:28:27,611 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 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 59 [2021-12-21 13:28:27,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:28:27,628 INFO L225 Difference]: With dead ends: 11966 [2021-12-21 13:28:27,629 INFO L226 Difference]: Without dead ends: 7036 [2021-12-21 13:28:27,633 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 [2021-12-21 13:28:27,633 INFO L933 BasicCegarLoop]: 166 mSDtfsCounter, 69 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:28:27,633 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 268 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:28:27,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7036 states. [2021-12-21 13:28:27,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7036 to 7034. [2021-12-21 13:28:27,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7034 states, 7033 states have (on average 1.4458979098535476) internal successors, (10169), 7033 states have internal predecessors, (10169), 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) [2021-12-21 13:28:27,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7034 states to 7034 states and 10169 transitions. [2021-12-21 13:28:27,977 INFO L78 Accepts]: Start accepts. Automaton has 7034 states and 10169 transitions. Word has length 59 [2021-12-21 13:28:27,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:28:27,977 INFO L470 AbstractCegarLoop]: Abstraction has 7034 states and 10169 transitions. [2021-12-21 13:28:27,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 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) [2021-12-21 13:28:27,977 INFO L276 IsEmpty]: Start isEmpty. Operand 7034 states and 10169 transitions. [2021-12-21 13:28:27,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-12-21 13:28:27,980 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:28:27,981 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:28:27,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-21 13:28:27,981 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:28:27,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:28:27,982 INFO L85 PathProgramCache]: Analyzing trace with hash 418253800, now seen corresponding path program 1 times [2021-12-21 13:28:27,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:28:27,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498535346] [2021-12-21 13:28:27,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:28:27,982 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:28:28,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:28:28,039 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-21 13:28:28,040 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:28:28,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498535346] [2021-12-21 13:28:28,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498535346] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 13:28:28,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541182183] [2021-12-21 13:28:28,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:28:28,040 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 13:28:28,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 13:28:28,042 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 13:28:28,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-21 13:28:28,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:28:28,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-21 13:28:28,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 13:28:28,342 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-21 13:28:28,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 13:28:28,682 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-21 13:28:28,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541182183] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 13:28:28,683 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 13:28:28,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 4] total 10 [2021-12-21 13:28:28,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808578738] [2021-12-21 13:28:28,683 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 13:28:28,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-21 13:28:28,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:28:28,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-21 13:28:28,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-12-21 13:28:28,685 INFO L87 Difference]: Start difference. First operand 7034 states and 10169 transitions. Second operand has 10 states, 10 states have (on average 22.9) internal successors, (229), 10 states have internal predecessors, (229), 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) [2021-12-21 13:28:29,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:28:29,631 INFO L93 Difference]: Finished difference Result 26408 states and 38489 transitions. [2021-12-21 13:28:29,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-21 13:28:29,631 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 22.9) internal successors, (229), 10 states have internal predecessors, (229), 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 82 [2021-12-21 13:28:29,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:28:29,669 INFO L225 Difference]: With dead ends: 26408 [2021-12-21 13:28:29,670 INFO L226 Difference]: Without dead ends: 21478 [2021-12-21 13:28:29,679 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 153 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-12-21 13:28:29,680 INFO L933 BasicCegarLoop]: 275 mSDtfsCounter, 935 mSDsluCounter, 912 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 935 SdHoareTripleChecker+Valid, 1187 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:28:29,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [935 Valid, 1187 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:28:29,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21478 states. [2021-12-21 13:28:30,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21478 to 20634. [2021-12-21 13:28:30,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20634 states, 20633 states have (on average 1.4389085445645327) internal successors, (29689), 20633 states have internal predecessors, (29689), 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) [2021-12-21 13:28:30,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20634 states to 20634 states and 29689 transitions. [2021-12-21 13:28:30,779 INFO L78 Accepts]: Start accepts. Automaton has 20634 states and 29689 transitions. Word has length 82 [2021-12-21 13:28:30,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:28:30,779 INFO L470 AbstractCegarLoop]: Abstraction has 20634 states and 29689 transitions. [2021-12-21 13:28:30,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 22.9) internal successors, (229), 10 states have internal predecessors, (229), 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) [2021-12-21 13:28:30,780 INFO L276 IsEmpty]: Start isEmpty. Operand 20634 states and 29689 transitions. [2021-12-21 13:28:30,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-21 13:28:30,783 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:28:30,784 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:28:30,804 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-21 13:28:30,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-21 13:28:31,000 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:28:31,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:28:31,000 INFO L85 PathProgramCache]: Analyzing trace with hash -1896856622, now seen corresponding path program 1 times [2021-12-21 13:28:31,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:28:31,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078483934] [2021-12-21 13:28:31,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:28:31,001 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:28:31,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:28:31,044 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-21 13:28:31,045 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:28:31,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078483934] [2021-12-21 13:28:31,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078483934] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:28:31,045 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:28:31,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 13:28:31,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850299781] [2021-12-21 13:28:31,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:28:31,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 13:28:31,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:28:31,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 13:28:31,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-21 13:28:31,047 INFO L87 Difference]: Start difference. First operand 20634 states and 29689 transitions. Second operand has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 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) [2021-12-21 13:28:32,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:28:32,446 INFO L93 Difference]: Finished difference Result 44764 states and 64742 transitions. [2021-12-21 13:28:32,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 13:28:32,446 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 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 83 [2021-12-21 13:28:32,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:28:32,511 INFO L225 Difference]: With dead ends: 44764 [2021-12-21 13:28:32,512 INFO L226 Difference]: Without dead ends: 36086 [2021-12-21 13:28:32,528 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-21 13:28:32,529 INFO L933 BasicCegarLoop]: 241 mSDtfsCounter, 660 mSDsluCounter, 650 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 660 SdHoareTripleChecker+Valid, 891 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:28:32,530 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [660 Valid, 891 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:28:32,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36086 states. [2021-12-21 13:28:33,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36086 to 27402. [2021-12-21 13:28:34,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27402 states, 27401 states have (on average 1.434436699390533) internal successors, (39305), 27401 states have internal predecessors, (39305), 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) [2021-12-21 13:28:34,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27402 states to 27402 states and 39305 transitions. [2021-12-21 13:28:34,080 INFO L78 Accepts]: Start accepts. Automaton has 27402 states and 39305 transitions. Word has length 83 [2021-12-21 13:28:34,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:28:34,081 INFO L470 AbstractCegarLoop]: Abstraction has 27402 states and 39305 transitions. [2021-12-21 13:28:34,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 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) [2021-12-21 13:28:34,081 INFO L276 IsEmpty]: Start isEmpty. Operand 27402 states and 39305 transitions. [2021-12-21 13:28:34,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-21 13:28:34,085 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:28:34,085 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:28:34,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-21 13:28:34,085 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:28:34,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:28:34,086 INFO L85 PathProgramCache]: Analyzing trace with hash -1918927774, now seen corresponding path program 1 times [2021-12-21 13:28:34,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:28:34,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179768519] [2021-12-21 13:28:34,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:28:34,087 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:28:34,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:28:34,113 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:28:34,113 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:28:34,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179768519] [2021-12-21 13:28:34,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179768519] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:28:34,114 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:28:34,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:28:34,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359747356] [2021-12-21 13:28:34,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:28:34,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:28:34,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:28:34,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:28:34,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:28:34,115 INFO L87 Difference]: Start difference. First operand 27402 states and 39305 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 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) [2021-12-21 13:28:36,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:28:36,043 INFO L93 Difference]: Finished difference Result 67249 states and 96337 transitions. [2021-12-21 13:28:36,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:28:36,044 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 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 83 [2021-12-21 13:28:36,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:28:36,108 INFO L225 Difference]: With dead ends: 67249 [2021-12-21 13:28:36,109 INFO L226 Difference]: Without dead ends: 44207 [2021-12-21 13:28:36,131 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 [2021-12-21 13:28:36,131 INFO L933 BasicCegarLoop]: 149 mSDtfsCounter, 69 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:28:36,132 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 272 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:28:36,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44207 states. [2021-12-21 13:28:38,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44207 to 42477. [2021-12-21 13:28:38,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42477 states, 42476 states have (on average 1.4172473867595818) internal successors, (60199), 42476 states have internal predecessors, (60199), 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) [2021-12-21 13:28:38,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42477 states to 42477 states and 60199 transitions. [2021-12-21 13:28:38,125 INFO L78 Accepts]: Start accepts. Automaton has 42477 states and 60199 transitions. Word has length 83 [2021-12-21 13:28:38,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:28:38,125 INFO L470 AbstractCegarLoop]: Abstraction has 42477 states and 60199 transitions. [2021-12-21 13:28:38,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 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) [2021-12-21 13:28:38,126 INFO L276 IsEmpty]: Start isEmpty. Operand 42477 states and 60199 transitions. [2021-12-21 13:28:38,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-21 13:28:38,131 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:28:38,132 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:28:38,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-21 13:28:38,132 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:28:38,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:28:38,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1322927490, now seen corresponding path program 1 times [2021-12-21 13:28:38,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:28:38,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96528583] [2021-12-21 13:28:38,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:28:38,133 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:28:38,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:28:38,156 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:28:38,157 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:28:38,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96528583] [2021-12-21 13:28:38,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96528583] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:28:38,157 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:28:38,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:28:38,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870615912] [2021-12-21 13:28:38,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:28:38,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:28:38,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:28:38,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:28:38,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:28:38,159 INFO L87 Difference]: Start difference. First operand 42477 states and 60199 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 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) [2021-12-21 13:28:40,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:28:40,816 INFO L93 Difference]: Finished difference Result 66562 states and 93995 transitions. [2021-12-21 13:28:40,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:28:40,816 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 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 83 [2021-12-21 13:28:40,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:28:40,880 INFO L225 Difference]: With dead ends: 66562 [2021-12-21 13:28:40,880 INFO L226 Difference]: Without dead ends: 43824 [2021-12-21 13:28:40,905 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 [2021-12-21 13:28:40,906 INFO L933 BasicCegarLoop]: 175 mSDtfsCounter, 71 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:28:40,906 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 298 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:28:40,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43824 states. [2021-12-21 13:28:42,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43824 to 42568. [2021-12-21 13:28:43,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42568 states, 42567 states have (on average 1.3918293513754787) internal successors, (59246), 42567 states have internal predecessors, (59246), 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) [2021-12-21 13:28:43,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42568 states to 42568 states and 59246 transitions. [2021-12-21 13:28:43,178 INFO L78 Accepts]: Start accepts. Automaton has 42568 states and 59246 transitions. Word has length 83 [2021-12-21 13:28:43,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:28:43,178 INFO L470 AbstractCegarLoop]: Abstraction has 42568 states and 59246 transitions. [2021-12-21 13:28:43,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 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) [2021-12-21 13:28:43,179 INFO L276 IsEmpty]: Start isEmpty. Operand 42568 states and 59246 transitions. [2021-12-21 13:28:43,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-21 13:28:43,184 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:28:43,185 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:28:43,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-21 13:28:43,185 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:28:43,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:28:43,185 INFO L85 PathProgramCache]: Analyzing trace with hash 895581426, now seen corresponding path program 1 times [2021-12-21 13:28:43,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:28:43,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947155855] [2021-12-21 13:28:43,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:28:43,186 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:28:43,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:28:43,216 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:28:43,216 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:28:43,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947155855] [2021-12-21 13:28:43,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947155855] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:28:43,216 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:28:43,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:28:43,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297749569] [2021-12-21 13:28:43,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:28:43,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:28:43,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:28:43,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:28:43,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:28:43,219 INFO L87 Difference]: Start difference. First operand 42568 states and 59246 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 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) [2021-12-21 13:28:46,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:28:46,179 INFO L93 Difference]: Finished difference Result 91626 states and 127103 transitions. [2021-12-21 13:28:46,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:28:46,180 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 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 83 [2021-12-21 13:28:46,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:28:46,256 INFO L225 Difference]: With dead ends: 91626 [2021-12-21 13:28:46,256 INFO L226 Difference]: Without dead ends: 58248 [2021-12-21 13:28:46,278 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 [2021-12-21 13:28:46,279 INFO L933 BasicCegarLoop]: 162 mSDtfsCounter, 70 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:28:46,280 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 285 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:28:46,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58248 states. [2021-12-21 13:28:48,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58248 to 57217. [2021-12-21 13:28:49,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57217 states, 57216 states have (on average 1.3692149049217002) internal successors, (78341), 57216 states have internal predecessors, (78341), 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) [2021-12-21 13:28:49,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57217 states to 57217 states and 78341 transitions. [2021-12-21 13:28:49,119 INFO L78 Accepts]: Start accepts. Automaton has 57217 states and 78341 transitions. Word has length 83 [2021-12-21 13:28:49,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:28:49,119 INFO L470 AbstractCegarLoop]: Abstraction has 57217 states and 78341 transitions. [2021-12-21 13:28:49,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 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) [2021-12-21 13:28:49,120 INFO L276 IsEmpty]: Start isEmpty. Operand 57217 states and 78341 transitions. [2021-12-21 13:28:49,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-21 13:28:49,126 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:28:49,126 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:28:49,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-21 13:28:49,127 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:28:49,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:28:49,127 INFO L85 PathProgramCache]: Analyzing trace with hash -679069464, now seen corresponding path program 1 times [2021-12-21 13:28:49,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:28:49,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412345473] [2021-12-21 13:28:49,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:28:49,128 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:28:49,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:28:49,164 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-21 13:28:49,164 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:28:49,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412345473] [2021-12-21 13:28:49,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412345473] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:28:49,165 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:28:49,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 13:28:49,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837429731] [2021-12-21 13:28:49,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:28:49,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 13:28:49,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:28:49,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 13:28:49,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-21 13:28:49,166 INFO L87 Difference]: Start difference. First operand 57217 states and 78341 transitions. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 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) [2021-12-21 13:28:53,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:28:53,636 INFO L93 Difference]: Finished difference Result 111218 states and 153817 transitions. [2021-12-21 13:28:53,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 13:28:53,636 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 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 83 [2021-12-21 13:28:53,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:28:53,783 INFO L225 Difference]: With dead ends: 111218 [2021-12-21 13:28:53,783 INFO L226 Difference]: Without dead ends: 100464 [2021-12-21 13:28:53,814 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-21 13:28:53,815 INFO L933 BasicCegarLoop]: 228 mSDtfsCounter, 668 mSDsluCounter, 594 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 668 SdHoareTripleChecker+Valid, 822 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 13:28:53,815 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [668 Valid, 822 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 13:28:53,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100464 states. [2021-12-21 13:28:57,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100464 to 67297. [2021-12-21 13:28:57,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67297 states, 67296 states have (on average 1.3704975035663338) internal successors, (92229), 67296 states have internal predecessors, (92229), 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) [2021-12-21 13:28:57,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67297 states to 67297 states and 92229 transitions. [2021-12-21 13:28:57,357 INFO L78 Accepts]: Start accepts. Automaton has 67297 states and 92229 transitions. Word has length 83 [2021-12-21 13:28:57,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:28:57,360 INFO L470 AbstractCegarLoop]: Abstraction has 67297 states and 92229 transitions. [2021-12-21 13:28:57,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 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) [2021-12-21 13:28:57,360 INFO L276 IsEmpty]: Start isEmpty. Operand 67297 states and 92229 transitions. [2021-12-21 13:28:57,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-21 13:28:57,366 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:28:57,366 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:28:57,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-21 13:28:57,366 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:28:57,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:28:57,367 INFO L85 PathProgramCache]: Analyzing trace with hash 576343346, now seen corresponding path program 1 times [2021-12-21 13:28:57,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:28:57,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447635332] [2021-12-21 13:28:57,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:28:57,367 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:28:57,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:28:57,410 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-21 13:28:57,410 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:28:57,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447635332] [2021-12-21 13:28:57,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447635332] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:28:57,411 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:28:57,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 13:28:57,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756422484] [2021-12-21 13:28:57,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:28:57,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 13:28:57,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:28:57,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 13:28:57,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-21 13:28:57,412 INFO L87 Difference]: Start difference. First operand 67297 states and 92229 transitions. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 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)