./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem14_label45.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e19ca921 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/eca-rers2012/Problem14_label45.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 d284e8efd4e45ee6ae258c3b376fc8f91ce52940016142658227b0ca393b3ff2 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 09:26:12,721 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 09:26:12,723 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 09:26:12,753 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 09:26:12,753 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 09:26:12,757 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 09:26:12,759 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 09:26:12,764 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 09:26:12,767 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 09:26:12,768 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 09:26:12,769 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 09:26:12,770 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 09:26:12,771 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 09:26:12,775 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 09:26:12,777 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 09:26:12,780 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 09:26:12,781 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 09:26:12,782 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 09:26:12,784 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 09:26:12,787 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 09:26:12,789 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 09:26:12,790 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 09:26:12,791 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 09:26:12,792 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 09:26:12,795 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 09:26:12,796 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 09:26:12,796 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 09:26:12,797 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 09:26:12,798 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 09:26:12,799 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 09:26:12,799 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 09:26:12,800 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 09:26:12,801 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 09:26:12,802 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 09:26:12,803 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 09:26:12,804 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 09:26:12,804 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 09:26:12,804 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 09:26:12,805 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 09:26:12,806 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 09:26:12,807 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 09:26:12,808 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-22 09:26:12,839 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 09:26:12,841 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 09:26:12,842 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 09:26:12,842 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 09:26:12,843 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 09:26:12,843 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 09:26:12,844 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 09:26:12,844 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 09:26:12,844 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 09:26:12,844 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 09:26:12,845 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 09:26:12,845 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 09:26:12,845 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 09:26:12,846 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 09:26:12,846 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 09:26:12,846 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 09:26:12,846 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 09:26:12,846 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 09:26:12,846 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 09:26:12,847 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 09:26:12,847 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 09:26:12,847 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 09:26:12,847 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 09:26:12,847 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 09:26:12,848 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 09:26:12,848 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 09:26:12,848 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 09:26:12,848 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 09:26:12,848 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 09:26:12,848 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 09:26:12,849 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 09:26:12,849 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 09:26:12,849 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 09:26:12,849 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 09:26:12,849 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d284e8efd4e45ee6ae258c3b376fc8f91ce52940016142658227b0ca393b3ff2 [2021-12-22 09:26:13,111 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 09:26:13,143 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 09:26:13,145 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 09:26:13,146 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 09:26:13,147 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 09:26:13,148 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem14_label45.c [2021-12-22 09:26:13,213 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b2d3d932b/e96469485998456b8cd664685cb2eae4/FLAG3a0e0fcb7 [2021-12-22 09:26:13,710 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 09:26:13,710 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem14_label45.c [2021-12-22 09:26:13,737 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b2d3d932b/e96469485998456b8cd664685cb2eae4/FLAG3a0e0fcb7 [2021-12-22 09:26:14,232 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b2d3d932b/e96469485998456b8cd664685cb2eae4 [2021-12-22 09:26:14,234 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 09:26:14,236 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 09:26:14,237 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 09:26:14,240 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 09:26:14,244 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 09:26:14,245 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:26:14" (1/1) ... [2021-12-22 09:26:14,246 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b0f7d30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:26:14, skipping insertion in model container [2021-12-22 09:26:14,246 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:26:14" (1/1) ... [2021-12-22 09:26:14,252 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 09:26:14,300 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 09:26:14,477 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/eca-rers2012/Problem14_label45.c[3828,3841] [2021-12-22 09:26:14,660 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 09:26:14,668 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 09:26:14,685 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/eca-rers2012/Problem14_label45.c[3828,3841] [2021-12-22 09:26:14,816 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 09:26:14,827 INFO L208 MainTranslator]: Completed translation [2021-12-22 09:26:14,827 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:26:14 WrapperNode [2021-12-22 09:26:14,828 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 09:26:14,829 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 09:26:14,829 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 09:26:14,829 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 09:26:14,835 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:26:14" (1/1) ... [2021-12-22 09:26:14,852 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:26:14" (1/1) ... [2021-12-22 09:26:14,951 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 858 [2021-12-22 09:26:14,951 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 09:26:14,952 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 09:26:14,953 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 09:26:14,953 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 09:26:14,960 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:26:14" (1/1) ... [2021-12-22 09:26:14,960 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:26:14" (1/1) ... [2021-12-22 09:26:14,979 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:26:14" (1/1) ... [2021-12-22 09:26:14,980 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:26:14" (1/1) ... [2021-12-22 09:26:15,012 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:26:14" (1/1) ... [2021-12-22 09:26:15,026 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:26:14" (1/1) ... [2021-12-22 09:26:15,047 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:26:14" (1/1) ... [2021-12-22 09:26:15,062 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 09:26:15,065 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 09:26:15,065 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 09:26:15,065 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 09:26:15,066 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:26:14" (1/1) ... [2021-12-22 09:26:15,073 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 09:26:15,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 09:26:15,101 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) [2021-12-22 09:26:15,125 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 [2021-12-22 09:26:15,142 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 09:26:15,142 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 09:26:15,142 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 09:26:15,142 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 09:26:15,191 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 09:26:15,193 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 09:26:16,178 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 09:26:16,187 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 09:26:16,188 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-22 09:26:16,190 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:26:16 BoogieIcfgContainer [2021-12-22 09:26:16,190 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 09:26:16,191 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 09:26:16,191 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 09:26:16,194 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 09:26:16,195 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 09:26:14" (1/3) ... [2021-12-22 09:26:16,195 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cd881bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:26:16, skipping insertion in model container [2021-12-22 09:26:16,195 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:26:14" (2/3) ... [2021-12-22 09:26:16,196 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cd881bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:26:16, skipping insertion in model container [2021-12-22 09:26:16,196 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:26:16" (3/3) ... [2021-12-22 09:26:16,197 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem14_label45.c [2021-12-22 09:26:16,201 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 09:26:16,201 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 09:26:16,238 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 09:26:16,244 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 [2021-12-22 09:26:16,244 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-22 09:26:16,260 INFO L276 IsEmpty]: Start isEmpty. Operand has 245 states, 243 states have (on average 1.7366255144032923) internal successors, (422), 244 states have internal predecessors, (422), 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) [2021-12-22 09:26:16,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-22 09:26:16,273 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:26:16,273 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] [2021-12-22 09:26:16,274 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:26:16,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:26:16,277 INFO L85 PathProgramCache]: Analyzing trace with hash -1318097310, now seen corresponding path program 1 times [2021-12-22 09:26:16,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:26:16,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77492561] [2021-12-22 09:26:16,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:26:16,284 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:26:16,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:26:16,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 09:26:16,535 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:26:16,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77492561] [2021-12-22 09:26:16,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77492561] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:26:16,536 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:26:16,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 09:26:16,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464763755] [2021-12-22 09:26:16,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:26:16,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:26:16,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:26:16,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:26:16,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:26:16,575 INFO L87 Difference]: Start difference. First operand has 245 states, 243 states have (on average 1.7366255144032923) internal successors, (422), 244 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 2 states have internal predecessors, (36), 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) [2021-12-22 09:26:17,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:26:17,472 INFO L93 Difference]: Finished difference Result 685 states and 1216 transitions. [2021-12-22 09:26:17,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:26:17,474 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 2 states have internal predecessors, (36), 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 36 [2021-12-22 09:26:17,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:26:17,485 INFO L225 Difference]: With dead ends: 685 [2021-12-22 09:26:17,486 INFO L226 Difference]: Without dead ends: 360 [2021-12-22 09:26:17,489 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:26:17,492 INFO L933 BasicCegarLoop]: 132 mSDtfsCounter, 182 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 535 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-22 09:26:17,493 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 139 Invalid, 711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 535 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-22 09:26:17,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-12-22 09:26:17,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 360. [2021-12-22 09:26:17,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 359 states have (on average 1.4206128133704736) internal successors, (510), 359 states have internal predecessors, (510), 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) [2021-12-22 09:26:17,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 510 transitions. [2021-12-22 09:26:17,540 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 510 transitions. Word has length 36 [2021-12-22 09:26:17,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:26:17,541 INFO L470 AbstractCegarLoop]: Abstraction has 360 states and 510 transitions. [2021-12-22 09:26:17,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 2 states have internal predecessors, (36), 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) [2021-12-22 09:26:17,542 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 510 transitions. [2021-12-22 09:26:17,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-12-22 09:26:17,547 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:26:17,547 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:26:17,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 09:26:17,548 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:26:17,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:26:17,551 INFO L85 PathProgramCache]: Analyzing trace with hash 598559029, now seen corresponding path program 1 times [2021-12-22 09:26:17,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:26:17,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668155694] [2021-12-22 09:26:17,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:26:17,553 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:26:17,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:26:17,764 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 09:26:17,764 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:26:17,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668155694] [2021-12-22 09:26:17,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668155694] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:26:17,765 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:26:17,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:26:17,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239436665] [2021-12-22 09:26:17,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:26:17,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 09:26:17,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:26:17,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 09:26:17,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 09:26:17,768 INFO L87 Difference]: Start difference. First operand 360 states and 510 transitions. Second operand has 4 states, 4 states have (on average 28.75) internal successors, (115), 3 states have internal predecessors, (115), 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) [2021-12-22 09:26:18,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:26:18,661 INFO L93 Difference]: Finished difference Result 1074 states and 1446 transitions. [2021-12-22 09:26:18,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 09:26:18,662 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.75) internal successors, (115), 3 states have internal predecessors, (115), 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 115 [2021-12-22 09:26:18,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:26:18,665 INFO L225 Difference]: With dead ends: 1074 [2021-12-22 09:26:18,666 INFO L226 Difference]: Without dead ends: 716 [2021-12-22 09:26:18,667 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 09:26:18,668 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 418 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 976 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 418 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 1017 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 976 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-22 09:26:18,668 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [418 Valid, 121 Invalid, 1017 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 976 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-22 09:26:18,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2021-12-22 09:26:18,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 716. [2021-12-22 09:26:18,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 715 states have (on average 1.2615384615384615) internal successors, (902), 715 states have internal predecessors, (902), 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) [2021-12-22 09:26:18,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 902 transitions. [2021-12-22 09:26:18,695 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 902 transitions. Word has length 115 [2021-12-22 09:26:18,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:26:18,696 INFO L470 AbstractCegarLoop]: Abstraction has 716 states and 902 transitions. [2021-12-22 09:26:18,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.75) internal successors, (115), 3 states have internal predecessors, (115), 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) [2021-12-22 09:26:18,696 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 902 transitions. [2021-12-22 09:26:18,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-12-22 09:26:18,701 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:26:18,701 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:26:18,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 09:26:18,701 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:26:18,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:26:18,702 INFO L85 PathProgramCache]: Analyzing trace with hash 962256372, now seen corresponding path program 1 times [2021-12-22 09:26:18,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:26:18,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974488136] [2021-12-22 09:26:18,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:26:18,703 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:26:18,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:26:18,821 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-22 09:26:18,822 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:26:18,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974488136] [2021-12-22 09:26:18,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974488136] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 09:26:18,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935448618] [2021-12-22 09:26:18,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:26:18,823 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:26:18,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 09:26:18,827 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) [2021-12-22 09:26:18,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-22 09:26:18,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:26:18,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 09:26:18,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 09:26:19,343 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-12-22 09:26:19,344 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 09:26:19,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935448618] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:26:19,344 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 09:26:19,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2021-12-22 09:26:19,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668570257] [2021-12-22 09:26:19,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:26:19,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:26:19,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:26:19,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:26:19,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-22 09:26:19,351 INFO L87 Difference]: Start difference. First operand 716 states and 902 transitions. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 2 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:26:19,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:26:19,899 INFO L93 Difference]: Finished difference Result 1252 states and 1612 transitions. [2021-12-22 09:26:19,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:26:19,900 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 2 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 141 [2021-12-22 09:26:19,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:26:19,905 INFO L225 Difference]: With dead ends: 1252 [2021-12-22 09:26:19,906 INFO L226 Difference]: Without dead ends: 1250 [2021-12-22 09:26:19,906 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-22 09:26:19,910 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 91 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-22 09:26:19,911 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 36 Invalid, 599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 574 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-22 09:26:19,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1250 states. [2021-12-22 09:26:19,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1250 to 894. [2021-12-22 09:26:19,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 894 states, 893 states have (on average 1.3370660694288914) internal successors, (1194), 893 states have internal predecessors, (1194), 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) [2021-12-22 09:26:19,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 894 states to 894 states and 1194 transitions. [2021-12-22 09:26:19,946 INFO L78 Accepts]: Start accepts. Automaton has 894 states and 1194 transitions. Word has length 141 [2021-12-22 09:26:19,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:26:19,947 INFO L470 AbstractCegarLoop]: Abstraction has 894 states and 1194 transitions. [2021-12-22 09:26:19,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 2 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:26:19,947 INFO L276 IsEmpty]: Start isEmpty. Operand 894 states and 1194 transitions. [2021-12-22 09:26:19,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-12-22 09:26:19,960 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:26:19,961 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:26:19,989 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-22 09:26:20,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:26:20,176 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:26:20,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:26:20,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1175834839, now seen corresponding path program 1 times [2021-12-22 09:26:20,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:26:20,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788227559] [2021-12-22 09:26:20,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:26:20,177 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:26:20,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:26:20,326 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 140 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-22 09:26:20,327 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:26:20,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788227559] [2021-12-22 09:26:20,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788227559] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:26:20,327 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:26:20,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:26:20,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360049077] [2021-12-22 09:26:20,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:26:20,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 09:26:20,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:26:20,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 09:26:20,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 09:26:20,334 INFO L87 Difference]: Start difference. First operand 894 states and 1194 transitions. Second operand has 4 states, 4 states have (on average 47.75) internal successors, (191), 3 states have internal predecessors, (191), 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) [2021-12-22 09:26:20,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:26:20,970 INFO L93 Difference]: Finished difference Result 1993 states and 2629 transitions. [2021-12-22 09:26:20,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 09:26:20,971 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 47.75) internal successors, (191), 3 states have internal predecessors, (191), 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 195 [2021-12-22 09:26:20,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:26:20,974 INFO L225 Difference]: With dead ends: 1993 [2021-12-22 09:26:20,974 INFO L226 Difference]: Without dead ends: 1072 [2021-12-22 09:26:20,975 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 09:26:20,976 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 104 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 736 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 736 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-22 09:26:20,977 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 121 Invalid, 802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 736 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-22 09:26:20,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1072 states. [2021-12-22 09:26:20,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1072 to 1072. [2021-12-22 09:26:20,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1072 states, 1071 states have (on average 1.1802054154995332) internal successors, (1264), 1071 states have internal predecessors, (1264), 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) [2021-12-22 09:26:20,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1072 states to 1072 states and 1264 transitions. [2021-12-22 09:26:20,998 INFO L78 Accepts]: Start accepts. Automaton has 1072 states and 1264 transitions. Word has length 195 [2021-12-22 09:26:20,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:26:20,998 INFO L470 AbstractCegarLoop]: Abstraction has 1072 states and 1264 transitions. [2021-12-22 09:26:20,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 47.75) internal successors, (191), 3 states have internal predecessors, (191), 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) [2021-12-22 09:26:20,999 INFO L276 IsEmpty]: Start isEmpty. Operand 1072 states and 1264 transitions. [2021-12-22 09:26:21,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2021-12-22 09:26:21,001 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:26:21,001 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:26:21,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 09:26:21,002 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:26:21,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:26:21,002 INFO L85 PathProgramCache]: Analyzing trace with hash 1612317507, now seen corresponding path program 1 times [2021-12-22 09:26:21,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:26:21,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693587397] [2021-12-22 09:26:21,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:26:21,003 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:26:21,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:26:21,128 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 67 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 09:26:21,129 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:26:21,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693587397] [2021-12-22 09:26:21,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693587397] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 09:26:21,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571674353] [2021-12-22 09:26:21,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:26:21,130 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:26:21,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 09:26:21,132 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 09:26:21,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-22 09:26:21,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:26:21,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 09:26:21,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 09:26:21,516 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-12-22 09:26:21,516 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 09:26:21,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571674353] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:26:21,517 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 09:26:21,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-12-22 09:26:21,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174498329] [2021-12-22 09:26:21,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:26:21,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:26:21,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:26:21,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:26:21,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-22 09:26:21,519 INFO L87 Difference]: Start difference. First operand 1072 states and 1264 transitions. Second operand has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 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) [2021-12-22 09:26:22,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:26:22,023 INFO L93 Difference]: Finished difference Result 2498 states and 3033 transitions. [2021-12-22 09:26:22,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:26:22,026 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 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 207 [2021-12-22 09:26:22,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:26:22,031 INFO L225 Difference]: With dead ends: 2498 [2021-12-22 09:26:22,032 INFO L226 Difference]: Without dead ends: 1428 [2021-12-22 09:26:22,033 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-22 09:26:22,034 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 147 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-22 09:26:22,034 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 85 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-22 09:26:22,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1428 states. [2021-12-22 09:26:22,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1428 to 1072. [2021-12-22 09:26:22,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1072 states, 1071 states have (on average 1.1802054154995332) internal successors, (1264), 1071 states have internal predecessors, (1264), 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) [2021-12-22 09:26:22,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1072 states to 1072 states and 1264 transitions. [2021-12-22 09:26:22,058 INFO L78 Accepts]: Start accepts. Automaton has 1072 states and 1264 transitions. Word has length 207 [2021-12-22 09:26:22,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:26:22,059 INFO L470 AbstractCegarLoop]: Abstraction has 1072 states and 1264 transitions. [2021-12-22 09:26:22,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 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) [2021-12-22 09:26:22,059 INFO L276 IsEmpty]: Start isEmpty. Operand 1072 states and 1264 transitions. [2021-12-22 09:26:22,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2021-12-22 09:26:22,061 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:26:22,061 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:26:22,088 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-22 09:26:22,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:26:22,286 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:26:22,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:26:22,287 INFO L85 PathProgramCache]: Analyzing trace with hash -1756406788, now seen corresponding path program 1 times [2021-12-22 09:26:22,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:26:22,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702521030] [2021-12-22 09:26:22,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:26:22,287 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:26:22,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:26:22,373 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 135 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 09:26:22,373 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:26:22,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702521030] [2021-12-22 09:26:22,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702521030] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:26:22,374 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:26:22,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:26:22,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248863258] [2021-12-22 09:26:22,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:26:22,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:26:22,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:26:22,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:26:22,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:26:22,376 INFO L87 Difference]: Start difference. First operand 1072 states and 1264 transitions. Second operand has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 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) [2021-12-22 09:26:22,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:26:22,855 INFO L93 Difference]: Finished difference Result 2676 states and 3213 transitions. [2021-12-22 09:26:22,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:26:22,856 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 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 210 [2021-12-22 09:26:22,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:26:22,861 INFO L225 Difference]: With dead ends: 2676 [2021-12-22 09:26:22,861 INFO L226 Difference]: Without dead ends: 1606 [2021-12-22 09:26:22,863 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 [2021-12-22 09:26:22,866 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 112 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 450 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-22 09:26:22,866 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 57 Invalid, 501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 450 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-22 09:26:22,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1606 states. [2021-12-22 09:26:22,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1606 to 1606. [2021-12-22 09:26:22,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1606 states, 1605 states have (on average 1.1576323987538941) internal successors, (1858), 1605 states have internal predecessors, (1858), 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) [2021-12-22 09:26:22,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1606 states to 1606 states and 1858 transitions. [2021-12-22 09:26:22,896 INFO L78 Accepts]: Start accepts. Automaton has 1606 states and 1858 transitions. Word has length 210 [2021-12-22 09:26:22,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:26:22,896 INFO L470 AbstractCegarLoop]: Abstraction has 1606 states and 1858 transitions. [2021-12-22 09:26:22,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 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) [2021-12-22 09:26:22,897 INFO L276 IsEmpty]: Start isEmpty. Operand 1606 states and 1858 transitions. [2021-12-22 09:26:22,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2021-12-22 09:26:22,901 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:26:22,901 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:26:22,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-22 09:26:22,902 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:26:22,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:26:22,903 INFO L85 PathProgramCache]: Analyzing trace with hash -1957778096, now seen corresponding path program 1 times [2021-12-22 09:26:22,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:26:22,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2722010] [2021-12-22 09:26:22,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:26:22,905 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:26:22,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:26:23,086 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 156 proven. 130 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-12-22 09:26:23,086 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:26:23,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2722010] [2021-12-22 09:26:23,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2722010] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 09:26:23,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270559433] [2021-12-22 09:26:23,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:26:23,087 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:26:23,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 09:26:23,089 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 09:26:23,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-22 09:26:23,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:26:23,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 09:26:23,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 09:26:23,771 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 267 trivial. 0 not checked. [2021-12-22 09:26:23,771 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 09:26:23,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270559433] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:26:23,771 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 09:26:23,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2021-12-22 09:26:23,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531436594] [2021-12-22 09:26:23,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:26:23,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:26:23,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:26:23,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:26:23,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-22 09:26:23,773 INFO L87 Difference]: Start difference. First operand 1606 states and 1858 transitions. Second operand has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 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) [2021-12-22 09:26:24,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:26:24,263 INFO L93 Difference]: Finished difference Result 3566 states and 4204 transitions. [2021-12-22 09:26:24,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:26:24,264 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 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 329 [2021-12-22 09:26:24,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:26:24,270 INFO L225 Difference]: With dead ends: 3566 [2021-12-22 09:26:24,270 INFO L226 Difference]: Without dead ends: 2140 [2021-12-22 09:26:24,273 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-22 09:26:24,274 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 82 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-22 09:26:24,274 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 47 Invalid, 525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-22 09:26:24,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2140 states. [2021-12-22 09:26:24,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2140 to 1962. [2021-12-22 09:26:24,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1962 states, 1961 states have (on average 1.1330953595104538) internal successors, (2222), 1961 states have internal predecessors, (2222), 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) [2021-12-22 09:26:24,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1962 states to 1962 states and 2222 transitions. [2021-12-22 09:26:24,308 INFO L78 Accepts]: Start accepts. Automaton has 1962 states and 2222 transitions. Word has length 329 [2021-12-22 09:26:24,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:26:24,309 INFO L470 AbstractCegarLoop]: Abstraction has 1962 states and 2222 transitions. [2021-12-22 09:26:24,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 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) [2021-12-22 09:26:24,309 INFO L276 IsEmpty]: Start isEmpty. Operand 1962 states and 2222 transitions. [2021-12-22 09:26:24,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 407 [2021-12-22 09:26:24,316 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:26:24,316 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:26:24,343 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-22 09:26:24,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:26:24,541 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:26:24,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:26:24,541 INFO L85 PathProgramCache]: Analyzing trace with hash 918840898, now seen corresponding path program 1 times [2021-12-22 09:26:24,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:26:24,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59555109] [2021-12-22 09:26:24,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:26:24,542 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:26:24,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:26:24,716 INFO L134 CoverageAnalysis]: Checked inductivity of 634 backedges. 366 proven. 0 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2021-12-22 09:26:24,717 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:26:24,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59555109] [2021-12-22 09:26:24,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59555109] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:26:24,717 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:26:24,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:26:24,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928202985] [2021-12-22 09:26:24,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:26:24,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 09:26:24,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:26:24,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 09:26:24,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 09:26:24,719 INFO L87 Difference]: Start difference. First operand 1962 states and 2222 transitions. Second operand has 4 states, 4 states have (on average 55.0) internal successors, (220), 3 states have internal predecessors, (220), 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) [2021-12-22 09:26:25,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:26:25,270 INFO L93 Difference]: Finished difference Result 3951 states and 4494 transitions. [2021-12-22 09:26:25,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 09:26:25,270 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 55.0) internal successors, (220), 3 states have internal predecessors, (220), 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 406 [2021-12-22 09:26:25,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:26:25,277 INFO L225 Difference]: With dead ends: 3951 [2021-12-22 09:26:25,277 INFO L226 Difference]: Without dead ends: 2140 [2021-12-22 09:26:25,280 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 09:26:25,281 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 142 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 685 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-22 09:26:25,281 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 17 Invalid, 742 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 685 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-22 09:26:25,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2140 states. [2021-12-22 09:26:25,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2140 to 1962. [2021-12-22 09:26:25,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1962 states, 1961 states have (on average 1.084140744518103) internal successors, (2126), 1961 states have internal predecessors, (2126), 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) [2021-12-22 09:26:25,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1962 states to 1962 states and 2126 transitions. [2021-12-22 09:26:25,314 INFO L78 Accepts]: Start accepts. Automaton has 1962 states and 2126 transitions. Word has length 406 [2021-12-22 09:26:25,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:26:25,315 INFO L470 AbstractCegarLoop]: Abstraction has 1962 states and 2126 transitions. [2021-12-22 09:26:25,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 55.0) internal successors, (220), 3 states have internal predecessors, (220), 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) [2021-12-22 09:26:25,316 INFO L276 IsEmpty]: Start isEmpty. Operand 1962 states and 2126 transitions. [2021-12-22 09:26:25,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 430 [2021-12-22 09:26:25,321 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:26:25,321 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:26:25,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-22 09:26:25,322 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:26:25,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:26:25,325 INFO L85 PathProgramCache]: Analyzing trace with hash 200589399, now seen corresponding path program 1 times [2021-12-22 09:26:25,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:26:25,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048553230] [2021-12-22 09:26:25,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:26:25,326 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:26:25,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:26:25,478 INFO L134 CoverageAnalysis]: Checked inductivity of 655 backedges. 341 proven. 0 refuted. 0 times theorem prover too weak. 314 trivial. 0 not checked. [2021-12-22 09:26:25,478 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:26:25,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048553230] [2021-12-22 09:26:25,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048553230] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:26:25,479 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:26:25,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:26:25,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092508488] [2021-12-22 09:26:25,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:26:25,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:26:25,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:26:25,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:26:25,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:26:25,481 INFO L87 Difference]: Start difference. First operand 1962 states and 2126 transitions. Second operand has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 3 states have internal predecessors, (221), 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) [2021-12-22 09:26:25,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:26:25,997 INFO L93 Difference]: Finished difference Result 4456 states and 4894 transitions. [2021-12-22 09:26:25,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:26:25,998 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 3 states have internal predecessors, (221), 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 429 [2021-12-22 09:26:25,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:26:26,007 INFO L225 Difference]: With dead ends: 4456 [2021-12-22 09:26:26,007 INFO L226 Difference]: Without dead ends: 2674 [2021-12-22 09:26:26,009 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 [2021-12-22 09:26:26,011 INFO L933 BasicCegarLoop]: 198 mSDtfsCounter, 113 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-22 09:26:26,012 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 202 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 423 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-22 09:26:26,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2674 states. [2021-12-22 09:26:26,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2674 to 2674. [2021-12-22 09:26:26,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2674 states, 2673 states have (on average 1.08791619902731) internal successors, (2908), 2673 states have internal predecessors, (2908), 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) [2021-12-22 09:26:26,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2674 states to 2674 states and 2908 transitions. [2021-12-22 09:26:26,057 INFO L78 Accepts]: Start accepts. Automaton has 2674 states and 2908 transitions. Word has length 429 [2021-12-22 09:26:26,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:26:26,058 INFO L470 AbstractCegarLoop]: Abstraction has 2674 states and 2908 transitions. [2021-12-22 09:26:26,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 3 states have internal predecessors, (221), 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) [2021-12-22 09:26:26,058 INFO L276 IsEmpty]: Start isEmpty. Operand 2674 states and 2908 transitions. [2021-12-22 09:26:26,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 471 [2021-12-22 09:26:26,064 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:26:26,065 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:26:26,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-22 09:26:26,065 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:26:26,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:26:26,066 INFO L85 PathProgramCache]: Analyzing trace with hash 1994262682, now seen corresponding path program 1 times [2021-12-22 09:26:26,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:26:26,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495282232] [2021-12-22 09:26:26,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:26:26,066 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:26:26,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:26:26,224 INFO L134 CoverageAnalysis]: Checked inductivity of 769 backedges. 455 proven. 0 refuted. 0 times theorem prover too weak. 314 trivial. 0 not checked. [2021-12-22 09:26:26,224 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:26:26,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495282232] [2021-12-22 09:26:26,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495282232] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:26:26,225 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:26:26,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:26:26,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868174313] [2021-12-22 09:26:26,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:26:26,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:26:26,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:26:26,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:26:26,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:26:26,227 INFO L87 Difference]: Start difference. First operand 2674 states and 2908 transitions. Second operand has 3 states, 3 states have (on average 87.33333333333333) internal successors, (262), 3 states have internal predecessors, (262), 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) [2021-12-22 09:26:26,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:26:26,696 INFO L93 Difference]: Finished difference Result 6236 states and 6878 transitions. [2021-12-22 09:26:26,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:26:26,697 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 87.33333333333333) internal successors, (262), 3 states have internal predecessors, (262), 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 470 [2021-12-22 09:26:26,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:26:26,709 INFO L225 Difference]: With dead ends: 6236 [2021-12-22 09:26:26,709 INFO L226 Difference]: Without dead ends: 3742 [2021-12-22 09:26:26,713 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 [2021-12-22 09:26:26,714 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 74 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-22 09:26:26,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 50 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 423 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-22 09:26:26,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3742 states. [2021-12-22 09:26:26,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3742 to 3742. [2021-12-22 09:26:26,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3742 states, 3741 states have (on average 1.083400160384924) internal successors, (4053), 3741 states have internal predecessors, (4053), 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) [2021-12-22 09:26:26,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3742 states to 3742 states and 4053 transitions. [2021-12-22 09:26:26,777 INFO L78 Accepts]: Start accepts. Automaton has 3742 states and 4053 transitions. Word has length 470 [2021-12-22 09:26:26,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:26:26,778 INFO L470 AbstractCegarLoop]: Abstraction has 3742 states and 4053 transitions. [2021-12-22 09:26:26,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 87.33333333333333) internal successors, (262), 3 states have internal predecessors, (262), 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) [2021-12-22 09:26:26,778 INFO L276 IsEmpty]: Start isEmpty. Operand 3742 states and 4053 transitions. [2021-12-22 09:26:26,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 507 [2021-12-22 09:26:26,786 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:26:26,786 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:26:26,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-22 09:26:26,787 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:26:26,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:26:26,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1478834189, now seen corresponding path program 1 times [2021-12-22 09:26:26,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:26:26,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065264156] [2021-12-22 09:26:26,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:26:26,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:26:26,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:26:26,945 INFO L134 CoverageAnalysis]: Checked inductivity of 988 backedges. 605 proven. 0 refuted. 0 times theorem prover too weak. 383 trivial. 0 not checked. [2021-12-22 09:26:26,946 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:26:26,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065264156] [2021-12-22 09:26:26,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065264156] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:26:26,946 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:26:26,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:26:26,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880374306] [2021-12-22 09:26:26,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:26:26,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:26:26,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:26:26,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:26:26,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:26:26,948 INFO L87 Difference]: Start difference. First operand 3742 states and 4053 transitions. Second operand has 3 states, 3 states have (on average 76.66666666666667) internal successors, (230), 3 states have internal predecessors, (230), 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) [2021-12-22 09:26:27,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:26:27,367 INFO L93 Difference]: Finished difference Result 7304 states and 7925 transitions. [2021-12-22 09:26:27,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:26:27,368 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 76.66666666666667) internal successors, (230), 3 states have internal predecessors, (230), 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 506 [2021-12-22 09:26:27,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:26:27,379 INFO L225 Difference]: With dead ends: 7304 [2021-12-22 09:26:27,379 INFO L226 Difference]: Without dead ends: 3742 [2021-12-22 09:26:27,383 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 [2021-12-22 09:26:27,384 INFO L933 BasicCegarLoop]: 238 mSDtfsCounter, 103 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-22 09:26:27,385 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 242 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-22 09:26:27,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3742 states. [2021-12-22 09:26:27,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3742 to 3208. [2021-12-22 09:26:27,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3208 states, 3207 states have (on average 1.0792017461802308) internal successors, (3461), 3207 states have internal predecessors, (3461), 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) [2021-12-22 09:26:27,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3208 states to 3208 states and 3461 transitions. [2021-12-22 09:26:27,439 INFO L78 Accepts]: Start accepts. Automaton has 3208 states and 3461 transitions. Word has length 506 [2021-12-22 09:26:27,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:26:27,440 INFO L470 AbstractCegarLoop]: Abstraction has 3208 states and 3461 transitions. [2021-12-22 09:26:27,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.66666666666667) internal successors, (230), 3 states have internal predecessors, (230), 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) [2021-12-22 09:26:27,440 INFO L276 IsEmpty]: Start isEmpty. Operand 3208 states and 3461 transitions. [2021-12-22 09:26:27,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 626 [2021-12-22 09:26:27,444 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:26:27,445 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 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] [2021-12-22 09:26:27,445 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-22 09:26:27,445 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:26:27,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:26:27,446 INFO L85 PathProgramCache]: Analyzing trace with hash -1228194463, now seen corresponding path program 1 times [2021-12-22 09:26:27,446 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:26:27,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338782148] [2021-12-22 09:26:27,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:26:27,446 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:26:27,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:26:27,658 INFO L134 CoverageAnalysis]: Checked inductivity of 1236 backedges. 812 proven. 110 refuted. 0 times theorem prover too weak. 314 trivial. 0 not checked. [2021-12-22 09:26:27,658 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:26:27,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338782148] [2021-12-22 09:26:27,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338782148] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 09:26:27,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695945052] [2021-12-22 09:26:27,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:26:27,659 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:26:27,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 09:26:27,660 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 09:26:27,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-22 09:26:27,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:26:27,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 801 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 09:26:27,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 09:26:28,674 INFO L134 CoverageAnalysis]: Checked inductivity of 1236 backedges. 169 proven. 0 refuted. 0 times theorem prover too weak. 1067 trivial. 0 not checked. [2021-12-22 09:26:28,675 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 09:26:28,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695945052] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:26:28,675 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 09:26:28,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-12-22 09:26:28,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785336883] [2021-12-22 09:26:28,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:26:28,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:26:28,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:26:28,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:26:28,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-22 09:26:28,679 INFO L87 Difference]: Start difference. First operand 3208 states and 3461 transitions. Second operand has 3 states, 3 states have (on average 65.33333333333333) internal successors, (196), 3 states have internal predecessors, (196), 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) [2021-12-22 09:26:29,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:26:29,130 INFO L93 Difference]: Finished difference Result 7304 states and 7920 transitions. [2021-12-22 09:26:29,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:26:29,131 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 65.33333333333333) internal successors, (196), 3 states have internal predecessors, (196), 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 625 [2021-12-22 09:26:29,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:26:29,141 INFO L225 Difference]: With dead ends: 7304 [2021-12-22 09:26:29,141 INFO L226 Difference]: Without dead ends: 4276 [2021-12-22 09:26:29,145 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 628 GetRequests, 625 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-22 09:26:29,146 INFO L933 BasicCegarLoop]: 232 mSDtfsCounter, 145 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-22 09:26:29,146 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 237 Invalid, 482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 432 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-22 09:26:29,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4276 states. [2021-12-22 09:26:29,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4276 to 4098. [2021-12-22 09:26:29,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4098 states, 4097 states have (on average 1.072247986331462) internal successors, (4393), 4097 states have internal predecessors, (4393), 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) [2021-12-22 09:26:29,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4098 states to 4098 states and 4393 transitions. [2021-12-22 09:26:29,232 INFO L78 Accepts]: Start accepts. Automaton has 4098 states and 4393 transitions. Word has length 625 [2021-12-22 09:26:29,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:26:29,233 INFO L470 AbstractCegarLoop]: Abstraction has 4098 states and 4393 transitions. [2021-12-22 09:26:29,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.33333333333333) internal successors, (196), 3 states have internal predecessors, (196), 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) [2021-12-22 09:26:29,233 INFO L276 IsEmpty]: Start isEmpty. Operand 4098 states and 4393 transitions. [2021-12-22 09:26:29,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 705 [2021-12-22 09:26:29,240 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:26:29,241 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:26:29,265 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-22 09:26:29,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:26:29,456 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:26:29,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:26:29,456 INFO L85 PathProgramCache]: Analyzing trace with hash -1503775658, now seen corresponding path program 1 times [2021-12-22 09:26:29,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:26:29,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036310326] [2021-12-22 09:26:29,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:26:29,457 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:26:29,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:26:29,692 INFO L134 CoverageAnalysis]: Checked inductivity of 1664 backedges. 1206 proven. 110 refuted. 0 times theorem prover too weak. 348 trivial. 0 not checked. [2021-12-22 09:26:29,692 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:26:29,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036310326] [2021-12-22 09:26:29,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036310326] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 09:26:29,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892089061] [2021-12-22 09:26:29,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:26:29,693 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:26:29,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 09:26:29,694 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 09:26:29,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-22 09:26:29,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:26:29,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 902 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 09:26:29,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 09:26:30,710 INFO L134 CoverageAnalysis]: Checked inductivity of 1664 backedges. 203 proven. 0 refuted. 0 times theorem prover too weak. 1461 trivial. 0 not checked. [2021-12-22 09:26:30,710 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 09:26:30,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892089061] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:26:30,710 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 09:26:30,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-12-22 09:26:30,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307678082] [2021-12-22 09:26:30,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:26:30,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:26:30,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:26:30,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:26:30,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-22 09:26:30,713 INFO L87 Difference]: Start difference. First operand 4098 states and 4393 transitions. Second operand has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 3 states have internal predecessors, (197), 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) [2021-12-22 09:26:31,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:26:31,121 INFO L93 Difference]: Finished difference Result 8906 states and 9550 transitions. [2021-12-22 09:26:31,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:26:31,122 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 3 states have internal predecessors, (197), 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 704 [2021-12-22 09:26:31,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:26:31,160 INFO L225 Difference]: With dead ends: 8906 [2021-12-22 09:26:31,164 INFO L226 Difference]: Without dead ends: 4098 [2021-12-22 09:26:31,168 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 707 GetRequests, 704 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-22 09:26:31,169 INFO L933 BasicCegarLoop]: 236 mSDtfsCounter, 145 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-22 09:26:31,169 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 241 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 392 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-22 09:26:31,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4098 states. [2021-12-22 09:26:31,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4098 to 3564. [2021-12-22 09:26:31,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3564 states, 3563 states have (on average 1.0637103564412012) internal successors, (3790), 3563 states have internal predecessors, (3790), 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) [2021-12-22 09:26:31,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3564 states to 3564 states and 3790 transitions. [2021-12-22 09:26:31,230 INFO L78 Accepts]: Start accepts. Automaton has 3564 states and 3790 transitions. Word has length 704 [2021-12-22 09:26:31,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:26:31,231 INFO L470 AbstractCegarLoop]: Abstraction has 3564 states and 3790 transitions. [2021-12-22 09:26:31,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 3 states have internal predecessors, (197), 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) [2021-12-22 09:26:31,232 INFO L276 IsEmpty]: Start isEmpty. Operand 3564 states and 3790 transitions. [2021-12-22 09:26:31,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 773 [2021-12-22 09:26:31,238 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:26:31,239 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:26:31,267 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-22 09:26:31,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-22 09:26:31,456 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:26:31,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:26:31,456 INFO L85 PathProgramCache]: Analyzing trace with hash -724163442, now seen corresponding path program 1 times [2021-12-22 09:26:31,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:26:31,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092914529] [2021-12-22 09:26:31,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:26:31,457 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:26:31,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:26:31,715 INFO L134 CoverageAnalysis]: Checked inductivity of 1727 backedges. 1224 proven. 155 refuted. 0 times theorem prover too weak. 348 trivial. 0 not checked. [2021-12-22 09:26:31,716 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:26:31,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092914529] [2021-12-22 09:26:31,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092914529] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 09:26:31,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396350146] [2021-12-22 09:26:31,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:26:31,716 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:26:31,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 09:26:31,717 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 09:26:31,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-22 09:26:31,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:26:31,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 973 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 09:26:31,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 09:26:32,833 INFO L134 CoverageAnalysis]: Checked inductivity of 1727 backedges. 203 proven. 0 refuted. 0 times theorem prover too weak. 1524 trivial. 0 not checked. [2021-12-22 09:26:32,834 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 09:26:32,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396350146] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:26:32,834 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 09:26:32,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-12-22 09:26:32,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558429239] [2021-12-22 09:26:32,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:26:32,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:26:32,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:26:32,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:26:32,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-22 09:26:32,836 INFO L87 Difference]: Start difference. First operand 3564 states and 3790 transitions. Second operand has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 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) [2021-12-22 09:26:33,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:26:33,252 INFO L93 Difference]: Finished difference Result 7838 states and 8373 transitions. [2021-12-22 09:26:33,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:26:33,253 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 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 772 [2021-12-22 09:26:33,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:26:33,272 INFO L225 Difference]: With dead ends: 7838 [2021-12-22 09:26:33,273 INFO L226 Difference]: Without dead ends: 4454 [2021-12-22 09:26:33,277 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 775 GetRequests, 772 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-22 09:26:33,278 INFO L933 BasicCegarLoop]: 224 mSDtfsCounter, 145 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-22 09:26:33,278 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 229 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 415 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-22 09:26:33,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4454 states. [2021-12-22 09:26:33,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4454 to 4098. [2021-12-22 09:26:33,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4098 states, 4097 states have (on average 1.0573590432023432) internal successors, (4332), 4097 states have internal predecessors, (4332), 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) [2021-12-22 09:26:33,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4098 states to 4098 states and 4332 transitions. [2021-12-22 09:26:33,339 INFO L78 Accepts]: Start accepts. Automaton has 4098 states and 4332 transitions. Word has length 772 [2021-12-22 09:26:33,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:26:33,340 INFO L470 AbstractCegarLoop]: Abstraction has 4098 states and 4332 transitions. [2021-12-22 09:26:33,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 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) [2021-12-22 09:26:33,341 INFO L276 IsEmpty]: Start isEmpty. Operand 4098 states and 4332 transitions. [2021-12-22 09:26:33,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 792 [2021-12-22 09:26:33,348 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:26:33,349 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:26:33,378 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-22 09:26:33,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:26:33,565 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:26:33,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:26:33,565 INFO L85 PathProgramCache]: Analyzing trace with hash 1347034201, now seen corresponding path program 1 times [2021-12-22 09:26:33,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:26:33,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798158530] [2021-12-22 09:26:33,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:26:33,566 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:26:33,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:26:33,823 INFO L134 CoverageAnalysis]: Checked inductivity of 1822 backedges. 1319 proven. 155 refuted. 0 times theorem prover too weak. 348 trivial. 0 not checked. [2021-12-22 09:26:33,824 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:26:33,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798158530] [2021-12-22 09:26:33,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798158530] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 09:26:33,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180861406] [2021-12-22 09:26:33,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:26:33,825 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:26:33,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 09:26:33,826 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 09:26:33,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-22 09:26:34,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:26:34,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 993 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 09:26:34,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 09:26:34,912 INFO L134 CoverageAnalysis]: Checked inductivity of 1822 backedges. 707 proven. 0 refuted. 0 times theorem prover too weak. 1115 trivial. 0 not checked. [2021-12-22 09:26:34,913 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 09:26:34,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180861406] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:26:34,913 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 09:26:34,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-12-22 09:26:34,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793049365] [2021-12-22 09:26:34,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:26:34,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:26:34,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:26:34,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:26:34,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-22 09:26:34,915 INFO L87 Difference]: Start difference. First operand 4098 states and 4332 transitions. Second operand has 3 states, 3 states have (on average 105.66666666666667) internal successors, (317), 3 states have internal predecessors, (317), 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) [2021-12-22 09:26:35,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:26:35,312 INFO L93 Difference]: Finished difference Result 8550 states and 9079 transitions. [2021-12-22 09:26:35,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:26:35,312 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 105.66666666666667) internal successors, (317), 3 states have internal predecessors, (317), 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 791 [2021-12-22 09:26:35,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:26:35,320 INFO L225 Difference]: With dead ends: 8550 [2021-12-22 09:26:35,321 INFO L226 Difference]: Without dead ends: 4810 [2021-12-22 09:26:35,324 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 794 GetRequests, 791 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-22 09:26:35,325 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 81 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-22 09:26:35,325 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 26 Invalid, 457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 408 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-22 09:26:35,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4810 states. [2021-12-22 09:26:35,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4810 to 4632. [2021-12-22 09:26:35,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4632 states, 4631 states have (on average 1.0563593176419779) internal successors, (4892), 4631 states have internal predecessors, (4892), 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) [2021-12-22 09:26:35,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4632 states to 4632 states and 4892 transitions. [2021-12-22 09:26:35,380 INFO L78 Accepts]: Start accepts. Automaton has 4632 states and 4892 transitions. Word has length 791 [2021-12-22 09:26:35,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:26:35,381 INFO L470 AbstractCegarLoop]: Abstraction has 4632 states and 4892 transitions. [2021-12-22 09:26:35,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 105.66666666666667) internal successors, (317), 3 states have internal predecessors, (317), 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) [2021-12-22 09:26:35,381 INFO L276 IsEmpty]: Start isEmpty. Operand 4632 states and 4892 transitions. [2021-12-22 09:26:35,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 806 [2021-12-22 09:26:35,388 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:26:35,389 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:26:35,417 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-22 09:26:35,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:26:35,604 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:26:35,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:26:35,604 INFO L85 PathProgramCache]: Analyzing trace with hash 380264438, now seen corresponding path program 1 times [2021-12-22 09:26:35,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:26:35,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270481164] [2021-12-22 09:26:35,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:26:35,604 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:26:35,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:26:35,862 INFO L134 CoverageAnalysis]: Checked inductivity of 1871 backedges. 1368 proven. 155 refuted. 0 times theorem prover too weak. 348 trivial. 0 not checked. [2021-12-22 09:26:35,863 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:26:35,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270481164] [2021-12-22 09:26:35,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270481164] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 09:26:35,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207269065] [2021-12-22 09:26:35,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:26:35,864 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:26:35,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 09:26:35,865 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 09:26:35,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-22 09:26:36,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:26:36,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 1005 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 09:26:36,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 09:26:37,163 INFO L134 CoverageAnalysis]: Checked inductivity of 1871 backedges. 1368 proven. 155 refuted. 0 times theorem prover too weak. 348 trivial. 0 not checked. [2021-12-22 09:26:37,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 09:26:38,195 INFO L134 CoverageAnalysis]: Checked inductivity of 1871 backedges. 1368 proven. 155 refuted. 0 times theorem prover too weak. 348 trivial. 0 not checked. [2021-12-22 09:26:38,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207269065] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 09:26:38,195 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 09:26:38,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2021-12-22 09:26:38,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310478316] [2021-12-22 09:26:38,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 09:26:38,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 09:26:38,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:26:38,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 09:26:38,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-12-22 09:26:38,198 INFO L87 Difference]: Start difference. First operand 4632 states and 4892 transitions. Second operand has 6 states, 6 states have (on average 149.16666666666666) internal successors, (895), 6 states have internal predecessors, (895), 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) [2021-12-22 09:26:38,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:26:38,999 INFO L93 Difference]: Finished difference Result 10330 states and 10924 transitions. [2021-12-22 09:26:39,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 09:26:39,000 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 149.16666666666666) internal successors, (895), 6 states have internal predecessors, (895), 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 805 [2021-12-22 09:26:39,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:26:39,007 INFO L225 Difference]: With dead ends: 10330 [2021-12-22 09:26:39,007 INFO L226 Difference]: Without dead ends: 6056 [2021-12-22 09:26:39,010 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1612 GetRequests, 1608 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-12-22 09:26:39,011 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 40 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 1210 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 1252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 1210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-22 09:26:39,011 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 58 Invalid, 1252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 1210 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-22 09:26:39,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6056 states. [2021-12-22 09:26:39,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6056 to 5344. [2021-12-22 09:26:39,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5344 states, 5343 states have (on average 1.0533408197641774) internal successors, (5628), 5343 states have internal predecessors, (5628), 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) [2021-12-22 09:26:39,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5344 states to 5344 states and 5628 transitions. [2021-12-22 09:26:39,094 INFO L78 Accepts]: Start accepts. Automaton has 5344 states and 5628 transitions. Word has length 805 [2021-12-22 09:26:39,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:26:39,095 INFO L470 AbstractCegarLoop]: Abstraction has 5344 states and 5628 transitions. [2021-12-22 09:26:39,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 149.16666666666666) internal successors, (895), 6 states have internal predecessors, (895), 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) [2021-12-22 09:26:39,095 INFO L276 IsEmpty]: Start isEmpty. Operand 5344 states and 5628 transitions. [2021-12-22 09:26:39,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 883 [2021-12-22 09:26:39,106 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:26:39,107 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 5, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:26:39,138 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-22 09:26:39,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-22 09:26:39,331 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:26:39,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:26:39,332 INFO L85 PathProgramCache]: Analyzing trace with hash 207381265, now seen corresponding path program 1 times [2021-12-22 09:26:39,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:26:39,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822846063] [2021-12-22 09:26:39,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:26:39,332 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:26:39,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:26:39,628 INFO L134 CoverageAnalysis]: Checked inductivity of 2491 backedges. 1685 proven. 0 refuted. 0 times theorem prover too weak. 806 trivial. 0 not checked. [2021-12-22 09:26:39,628 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:26:39,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822846063] [2021-12-22 09:26:39,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822846063] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:26:39,629 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:26:39,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:26:39,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306436312] [2021-12-22 09:26:39,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:26:39,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:26:39,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:26:39,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:26:39,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:26:39,631 INFO L87 Difference]: Start difference. First operand 5344 states and 5628 transitions. Second operand has 3 states, 3 states have (on average 143.0) internal successors, (429), 3 states have internal predecessors, (429), 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) [2021-12-22 09:26:40,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:26:40,067 INFO L93 Difference]: Finished difference Result 10152 states and 10715 transitions. [2021-12-22 09:26:40,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:26:40,068 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 143.0) internal successors, (429), 3 states have internal predecessors, (429), 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 882 [2021-12-22 09:26:40,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:26:40,075 INFO L225 Difference]: With dead ends: 10152 [2021-12-22 09:26:40,076 INFO L226 Difference]: Without dead ends: 5166 [2021-12-22 09:26:40,080 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 [2021-12-22 09:26:40,081 INFO L933 BasicCegarLoop]: 213 mSDtfsCounter, 21 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-22 09:26:40,081 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 218 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-22 09:26:40,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5166 states. [2021-12-22 09:26:40,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5166 to 4988. [2021-12-22 09:26:40,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4988 states, 4987 states have (on average 1.0449167836374573) internal successors, (5211), 4987 states have internal predecessors, (5211), 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) [2021-12-22 09:26:40,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4988 states to 4988 states and 5211 transitions. [2021-12-22 09:26:40,144 INFO L78 Accepts]: Start accepts. Automaton has 4988 states and 5211 transitions. Word has length 882 [2021-12-22 09:26:40,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:26:40,145 INFO L470 AbstractCegarLoop]: Abstraction has 4988 states and 5211 transitions. [2021-12-22 09:26:40,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 143.0) internal successors, (429), 3 states have internal predecessors, (429), 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) [2021-12-22 09:26:40,145 INFO L276 IsEmpty]: Start isEmpty. Operand 4988 states and 5211 transitions. [2021-12-22 09:26:40,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 907 [2021-12-22 09:26:40,155 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:26:40,156 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 5, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:26:40,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-22 09:26:40,156 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:26:40,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:26:40,157 INFO L85 PathProgramCache]: Analyzing trace with hash -2060216049, now seen corresponding path program 1 times [2021-12-22 09:26:40,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:26:40,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899920948] [2021-12-22 09:26:40,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:26:40,157 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:26:40,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:26:40,449 INFO L134 CoverageAnalysis]: Checked inductivity of 2527 backedges. 1696 proven. 93 refuted. 0 times theorem prover too weak. 738 trivial. 0 not checked. [2021-12-22 09:26:40,449 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:26:40,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899920948] [2021-12-22 09:26:40,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899920948] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 09:26:40,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688664271] [2021-12-22 09:26:40,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:26:40,450 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:26:40,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 09:26:40,451 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 09:26:40,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-22 09:26:40,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:26:40,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 1124 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 09:26:40,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 09:26:41,725 INFO L134 CoverageAnalysis]: Checked inductivity of 2527 backedges. 237 proven. 0 refuted. 0 times theorem prover too weak. 2290 trivial. 0 not checked. [2021-12-22 09:26:41,726 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 09:26:41,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688664271] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:26:41,726 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 09:26:41,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-12-22 09:26:41,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834117592] [2021-12-22 09:26:41,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:26:41,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:26:41,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:26:41,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:26:41,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-22 09:26:41,728 INFO L87 Difference]: Start difference. First operand 4988 states and 5211 transitions. Second operand has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 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) [2021-12-22 09:26:42,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:26:42,129 INFO L93 Difference]: Finished difference Result 9796 states and 10244 transitions. [2021-12-22 09:26:42,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:26:42,130 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 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 906 [2021-12-22 09:26:42,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:26:42,137 INFO L225 Difference]: With dead ends: 9796 [2021-12-22 09:26:42,137 INFO L226 Difference]: Without dead ends: 5166 [2021-12-22 09:26:42,141 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 909 GetRequests, 905 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-22 09:26:42,142 INFO L933 BasicCegarLoop]: 203 mSDtfsCounter, 147 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-22 09:26:42,142 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 208 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 413 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-22 09:26:42,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5166 states. [2021-12-22 09:26:42,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5166 to 4810. [2021-12-22 09:26:42,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4810 states, 4809 states have (on average 1.0411728009981285) internal successors, (5007), 4809 states have internal predecessors, (5007), 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) [2021-12-22 09:26:42,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4810 states to 4810 states and 5007 transitions. [2021-12-22 09:26:42,218 INFO L78 Accepts]: Start accepts. Automaton has 4810 states and 5007 transitions. Word has length 906 [2021-12-22 09:26:42,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:26:42,218 INFO L470 AbstractCegarLoop]: Abstraction has 4810 states and 5007 transitions. [2021-12-22 09:26:42,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 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) [2021-12-22 09:26:42,219 INFO L276 IsEmpty]: Start isEmpty. Operand 4810 states and 5007 transitions. [2021-12-22 09:26:42,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 915 [2021-12-22 09:26:42,228 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:26:42,229 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 5, 5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:26:42,254 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-22 09:26:42,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-22 09:26:42,443 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:26:42,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:26:42,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1395619067, now seen corresponding path program 1 times [2021-12-22 09:26:42,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:26:42,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515652721] [2021-12-22 09:26:42,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:26:42,444 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:26:42,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:26:42,717 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 1710 proven. 93 refuted. 0 times theorem prover too weak. 747 trivial. 0 not checked. [2021-12-22 09:26:42,717 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:26:42,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515652721] [2021-12-22 09:26:42,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515652721] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 09:26:42,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991839221] [2021-12-22 09:26:42,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:26:42,718 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:26:42,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 09:26:42,719 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 09:26:42,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-22 09:26:42,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:26:42,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 1130 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 09:26:42,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 09:26:44,329 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 864 proven. 0 refuted. 0 times theorem prover too weak. 1686 trivial. 0 not checked. [2021-12-22 09:26:44,329 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 09:26:44,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991839221] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:26:44,329 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 09:26:44,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2021-12-22 09:26:44,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055820648] [2021-12-22 09:26:44,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:26:44,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:26:44,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:26:44,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:26:44,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-22 09:26:44,331 INFO L87 Difference]: Start difference. First operand 4810 states and 5007 transitions. Second operand has 3 states, 3 states have (on average 99.0) internal successors, (297), 2 states have internal predecessors, (297), 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) [2021-12-22 09:26:44,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:26:44,662 INFO L93 Difference]: Finished difference Result 9974 states and 10392 transitions. [2021-12-22 09:26:44,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:26:44,662 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 99.0) internal successors, (297), 2 states have internal predecessors, (297), 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 914 [2021-12-22 09:26:44,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:26:44,671 INFO L225 Difference]: With dead ends: 9974 [2021-12-22 09:26:44,671 INFO L226 Difference]: Without dead ends: 5522 [2021-12-22 09:26:44,676 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 917 GetRequests, 913 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-22 09:26:44,677 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 09:26:44,677 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 38 Invalid, 418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-22 09:26:44,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5522 states. [2021-12-22 09:26:44,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5522 to 4988. [2021-12-22 09:26:44,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4988 states, 4987 states have (on average 1.040304792460397) internal successors, (5188), 4987 states have internal predecessors, (5188), 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) [2021-12-22 09:26:44,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4988 states to 4988 states and 5188 transitions. [2021-12-22 09:26:44,773 INFO L78 Accepts]: Start accepts. Automaton has 4988 states and 5188 transitions. Word has length 914 [2021-12-22 09:26:44,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:26:44,774 INFO L470 AbstractCegarLoop]: Abstraction has 4988 states and 5188 transitions. [2021-12-22 09:26:44,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 99.0) internal successors, (297), 2 states have internal predecessors, (297), 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) [2021-12-22 09:26:44,774 INFO L276 IsEmpty]: Start isEmpty. Operand 4988 states and 5188 transitions. [2021-12-22 09:26:44,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 939 [2021-12-22 09:26:44,789 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:26:44,790 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 5, 5, 4, 4, 3, 3, 3, 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, 1] [2021-12-22 09:26:44,817 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-22 09:26:45,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:26:45,004 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:26:45,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:26:45,004 INFO L85 PathProgramCache]: Analyzing trace with hash 751779683, now seen corresponding path program 1 times [2021-12-22 09:26:45,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:26:45,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348301048] [2021-12-22 09:26:45,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:26:45,005 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:26:45,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:26:45,318 INFO L134 CoverageAnalysis]: Checked inductivity of 3031 backedges. 1946 proven. 93 refuted. 0 times theorem prover too weak. 992 trivial. 0 not checked. [2021-12-22 09:26:45,318 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:26:45,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348301048] [2021-12-22 09:26:45,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348301048] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 09:26:45,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590452977] [2021-12-22 09:26:45,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:26:45,321 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:26:45,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 09:26:45,340 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 09:26:45,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-22 09:26:45,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:26:45,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 1182 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 09:26:45,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 09:26:47,214 INFO L134 CoverageAnalysis]: Checked inductivity of 3031 backedges. 2039 proven. 0 refuted. 0 times theorem prover too weak. 992 trivial. 0 not checked. [2021-12-22 09:26:47,214 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 09:26:47,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590452977] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:26:47,214 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 09:26:47,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-12-22 09:26:47,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102010622] [2021-12-22 09:26:47,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:26:47,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:26:47,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:26:47,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:26:47,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-22 09:26:47,216 INFO L87 Difference]: Start difference. First operand 4988 states and 5188 transitions. Second operand has 3 states, 3 states have (on average 136.66666666666666) internal successors, (410), 3 states have internal predecessors, (410), 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) [2021-12-22 09:26:47,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:26:47,608 INFO L93 Difference]: Finished difference Result 9796 states and 10198 transitions. [2021-12-22 09:26:47,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:26:47,609 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 136.66666666666666) internal successors, (410), 3 states have internal predecessors, (410), 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 938 [2021-12-22 09:26:47,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:26:47,617 INFO L225 Difference]: With dead ends: 9796 [2021-12-22 09:26:47,617 INFO L226 Difference]: Without dead ends: 5166 [2021-12-22 09:26:47,621 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 941 GetRequests, 937 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-22 09:26:47,621 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 8 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-22 09:26:47,622 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 52 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-22 09:26:47,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5166 states. [2021-12-22 09:26:47,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5166 to 4810. [2021-12-22 09:26:47,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4810 states, 4809 states have (on average 1.0411728009981285) internal successors, (5007), 4809 states have internal predecessors, (5007), 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) [2021-12-22 09:26:47,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4810 states to 4810 states and 5007 transitions. [2021-12-22 09:26:47,677 INFO L78 Accepts]: Start accepts. Automaton has 4810 states and 5007 transitions. Word has length 938 [2021-12-22 09:26:47,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:26:47,678 INFO L470 AbstractCegarLoop]: Abstraction has 4810 states and 5007 transitions. [2021-12-22 09:26:47,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 136.66666666666666) internal successors, (410), 3 states have internal predecessors, (410), 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) [2021-12-22 09:26:47,678 INFO L276 IsEmpty]: Start isEmpty. Operand 4810 states and 5007 transitions. [2021-12-22 09:26:47,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1016 [2021-12-22 09:26:47,689 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:26:47,690 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 5, 5, 4, 4, 3, 3, 3, 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, 1, 1] [2021-12-22 09:26:47,714 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-22 09:26:47,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:26:47,915 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:26:47,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:26:47,915 INFO L85 PathProgramCache]: Analyzing trace with hash 1927304045, now seen corresponding path program 1 times [2021-12-22 09:26:47,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:26:47,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189771523] [2021-12-22 09:26:47,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:26:47,915 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:26:48,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:26:48,289 INFO L134 CoverageAnalysis]: Checked inductivity of 3675 backedges. 1701 proven. 0 refuted. 0 times theorem prover too weak. 1974 trivial. 0 not checked. [2021-12-22 09:26:48,289 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:26:48,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189771523] [2021-12-22 09:26:48,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189771523] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:26:48,289 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:26:48,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 09:26:48,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864968474] [2021-12-22 09:26:48,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:26:48,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 09:26:48,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:26:48,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 09:26:48,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-22 09:26:48,291 INFO L87 Difference]: Start difference. First operand 4810 states and 5007 transitions. Second operand has 7 states, 7 states have (on average 49.857142857142854) internal successors, (349), 6 states have internal predecessors, (349), 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) [2021-12-22 09:26:48,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:26:48,862 INFO L93 Difference]: Finished difference Result 9490 states and 9886 transitions. [2021-12-22 09:26:48,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 09:26:48,862 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 49.857142857142854) internal successors, (349), 6 states have internal predecessors, (349), 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 1015 [2021-12-22 09:26:48,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:26:48,869 INFO L225 Difference]: With dead ends: 9490 [2021-12-22 09:26:48,870 INFO L226 Difference]: Without dead ends: 4988 [2021-12-22 09:26:48,874 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-22 09:26:48,874 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 77 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 946 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 958 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 946 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-22 09:26:48,874 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 28 Invalid, 958 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 946 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-22 09:26:48,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4988 states. [2021-12-22 09:26:48,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4988 to 4810. [2021-12-22 09:26:48,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4810 states, 4809 states have (on average 1.0330630068621336) internal successors, (4968), 4809 states have internal predecessors, (4968), 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) [2021-12-22 09:26:48,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4810 states to 4810 states and 4968 transitions. [2021-12-22 09:26:48,927 INFO L78 Accepts]: Start accepts. Automaton has 4810 states and 4968 transitions. Word has length 1015 [2021-12-22 09:26:48,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:26:48,928 INFO L470 AbstractCegarLoop]: Abstraction has 4810 states and 4968 transitions. [2021-12-22 09:26:48,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 49.857142857142854) internal successors, (349), 6 states have internal predecessors, (349), 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) [2021-12-22 09:26:48,928 INFO L276 IsEmpty]: Start isEmpty. Operand 4810 states and 4968 transitions. [2021-12-22 09:26:48,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1048 [2021-12-22 09:26:48,940 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:26:48,940 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:26:48,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-22 09:26:48,941 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:26:48,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:26:48,941 INFO L85 PathProgramCache]: Analyzing trace with hash -1401544166, now seen corresponding path program 1 times [2021-12-22 09:26:48,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:26:48,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670594822] [2021-12-22 09:26:48,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:26:48,942 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:26:49,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:26:49,267 INFO L134 CoverageAnalysis]: Checked inductivity of 3551 backedges. 1082 proven. 0 refuted. 0 times theorem prover too weak. 2469 trivial. 0 not checked. [2021-12-22 09:26:49,267 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:26:49,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670594822] [2021-12-22 09:26:49,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670594822] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:26:49,268 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:26:49,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:26:49,268 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433791171] [2021-12-22 09:26:49,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:26:49,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:26:49,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:26:49,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:26:49,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:26:49,271 INFO L87 Difference]: Start difference. First operand 4810 states and 4968 transitions. Second operand has 3 states, 3 states have (on average 111.33333333333333) internal successors, (334), 3 states have internal predecessors, (334), 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) [2021-12-22 09:26:49,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:26:49,610 INFO L93 Difference]: Finished difference Result 9262 states and 9576 transitions. [2021-12-22 09:26:49,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:26:49,611 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 111.33333333333333) internal successors, (334), 3 states have internal predecessors, (334), 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 1047 [2021-12-22 09:26:49,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:26:49,618 INFO L225 Difference]: With dead ends: 9262 [2021-12-22 09:26:49,618 INFO L226 Difference]: Without dead ends: 4810 [2021-12-22 09:26:49,622 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 [2021-12-22 09:26:49,622 INFO L933 BasicCegarLoop]: 218 mSDtfsCounter, 66 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 09:26:49,623 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 223 Invalid, 405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 392 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-22 09:26:49,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4810 states. [2021-12-22 09:26:49,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4810 to 4810. [2021-12-22 09:26:49,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4810 states, 4809 states have (on average 1.0295279683925973) internal successors, (4951), 4809 states have internal predecessors, (4951), 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) [2021-12-22 09:26:49,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4810 states to 4810 states and 4951 transitions. [2021-12-22 09:26:49,673 INFO L78 Accepts]: Start accepts. Automaton has 4810 states and 4951 transitions. Word has length 1047 [2021-12-22 09:26:49,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:26:49,674 INFO L470 AbstractCegarLoop]: Abstraction has 4810 states and 4951 transitions. [2021-12-22 09:26:49,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 111.33333333333333) internal successors, (334), 3 states have internal predecessors, (334), 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) [2021-12-22 09:26:49,674 INFO L276 IsEmpty]: Start isEmpty. Operand 4810 states and 4951 transitions. [2021-12-22 09:26:49,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1096 [2021-12-22 09:26:49,686 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:26:49,686 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:26:49,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-22 09:26:49,687 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:26:49,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:26:49,687 INFO L85 PathProgramCache]: Analyzing trace with hash -1689291374, now seen corresponding path program 1 times [2021-12-22 09:26:49,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:26:49,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716672552] [2021-12-22 09:26:49,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:26:49,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:26:49,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:26:50,071 INFO L134 CoverageAnalysis]: Checked inductivity of 3788 backedges. 2738 proven. 72 refuted. 0 times theorem prover too weak. 978 trivial. 0 not checked. [2021-12-22 09:26:50,071 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:26:50,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716672552] [2021-12-22 09:26:50,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716672552] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 09:26:50,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242799644] [2021-12-22 09:26:50,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:26:50,072 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:26:50,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 09:26:50,073 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 09:26:50,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-22 09:26:50,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:26:50,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 1364 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-22 09:26:50,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 09:26:51,838 INFO L134 CoverageAnalysis]: Checked inductivity of 3788 backedges. 2451 proven. 0 refuted. 0 times theorem prover too weak. 1337 trivial. 0 not checked. [2021-12-22 09:26:51,838 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 09:26:51,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242799644] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:26:51,838 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 09:26:51,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2021-12-22 09:26:51,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093979173] [2021-12-22 09:26:51,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:26:51,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 09:26:51,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:26:51,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 09:26:51,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-22 09:26:51,841 INFO L87 Difference]: Start difference. First operand 4810 states and 4951 transitions. Second operand has 4 states, 4 states have (on average 148.75) internal successors, (595), 4 states have internal predecessors, (595), 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) [2021-12-22 09:26:52,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:26:52,408 INFO L93 Difference]: Finished difference Result 9796 states and 10101 transitions. [2021-12-22 09:26:52,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 09:26:52,409 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 148.75) internal successors, (595), 4 states have internal predecessors, (595), 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 1095 [2021-12-22 09:26:52,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:26:52,413 INFO L225 Difference]: With dead ends: 9796 [2021-12-22 09:26:52,413 INFO L226 Difference]: Without dead ends: 5344 [2021-12-22 09:26:52,416 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1099 GetRequests, 1094 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-22 09:26:52,417 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 68 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 773 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 773 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-22 09:26:52,417 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 39 Invalid, 811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 773 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-22 09:26:52,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5344 states. [2021-12-22 09:26:52,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5344 to 5166. [2021-12-22 09:26:52,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5166 states, 5165 states have (on average 1.028460793804453) internal successors, (5312), 5165 states have internal predecessors, (5312), 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) [2021-12-22 09:26:52,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5166 states to 5166 states and 5312 transitions. [2021-12-22 09:26:52,467 INFO L78 Accepts]: Start accepts. Automaton has 5166 states and 5312 transitions. Word has length 1095 [2021-12-22 09:26:52,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:26:52,467 INFO L470 AbstractCegarLoop]: Abstraction has 5166 states and 5312 transitions. [2021-12-22 09:26:52,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 148.75) internal successors, (595), 4 states have internal predecessors, (595), 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) [2021-12-22 09:26:52,472 INFO L276 IsEmpty]: Start isEmpty. Operand 5166 states and 5312 transitions. [2021-12-22 09:26:52,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1336 [2021-12-22 09:26:52,487 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:26:52,488 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 7, 7, 7, 7, 7, 7, 7, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:26:52,517 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-22 09:26:52,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-12-22 09:26:52,712 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:26:52,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:26:52,712 INFO L85 PathProgramCache]: Analyzing trace with hash -808907614, now seen corresponding path program 1 times [2021-12-22 09:26:52,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:26:52,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576931099] [2021-12-22 09:26:52,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:26:52,713 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:26:52,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:26:53,088 INFO L134 CoverageAnalysis]: Checked inductivity of 5860 backedges. 3029 proven. 0 refuted. 0 times theorem prover too weak. 2831 trivial. 0 not checked. [2021-12-22 09:26:53,089 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:26:53,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576931099] [2021-12-22 09:26:53,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576931099] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:26:53,089 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:26:53,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:26:53,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967740055] [2021-12-22 09:26:53,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:26:53,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:26:53,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:26:53,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:26:53,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:26:53,092 INFO L87 Difference]: Start difference. First operand 5166 states and 5312 transitions. Second operand has 3 states, 3 states have (on average 145.33333333333334) internal successors, (436), 3 states have internal predecessors, (436), 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) [2021-12-22 09:26:53,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:26:53,442 INFO L93 Difference]: Finished difference Result 9974 states and 10264 transitions. [2021-12-22 09:26:53,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:26:53,442 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 145.33333333333334) internal successors, (436), 3 states have internal predecessors, (436), 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 1335 [2021-12-22 09:26:53,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:26:53,448 INFO L225 Difference]: With dead ends: 9974 [2021-12-22 09:26:53,448 INFO L226 Difference]: Without dead ends: 5166 [2021-12-22 09:26:53,451 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 [2021-12-22 09:26:53,452 INFO L933 BasicCegarLoop]: 220 mSDtfsCounter, 53 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 09:26:53,452 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 225 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-22 09:26:53,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5166 states. [2021-12-22 09:26:53,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5166 to 4988. [2021-12-22 09:26:53,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4988 states, 4987 states have (on average 1.0280729897734109) internal successors, (5127), 4987 states have internal predecessors, (5127), 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) [2021-12-22 09:26:53,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4988 states to 4988 states and 5127 transitions. [2021-12-22 09:26:53,502 INFO L78 Accepts]: Start accepts. Automaton has 4988 states and 5127 transitions. Word has length 1335 [2021-12-22 09:26:53,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:26:53,502 INFO L470 AbstractCegarLoop]: Abstraction has 4988 states and 5127 transitions. [2021-12-22 09:26:53,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 145.33333333333334) internal successors, (436), 3 states have internal predecessors, (436), 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) [2021-12-22 09:26:53,503 INFO L276 IsEmpty]: Start isEmpty. Operand 4988 states and 5127 transitions. [2021-12-22 09:26:53,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1633 [2021-12-22 09:26:53,523 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:26:53,523 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 9, 9, 9, 8, 8, 8, 8, 7, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:26:53,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-22 09:26:53,524 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:26:53,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:26:53,524 INFO L85 PathProgramCache]: Analyzing trace with hash 2046809236, now seen corresponding path program 1 times [2021-12-22 09:26:53,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:26:53,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201085001] [2021-12-22 09:26:53,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:26:53,525 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:26:53,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:26:54,312 INFO L134 CoverageAnalysis]: Checked inductivity of 8487 backedges. 4301 proven. 571 refuted. 0 times theorem prover too weak. 3615 trivial. 0 not checked. [2021-12-22 09:26:54,312 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:26:54,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201085001] [2021-12-22 09:26:54,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201085001] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 09:26:54,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92868151] [2021-12-22 09:26:54,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:26:54,313 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:26:54,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 09:26:54,316 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 09:26:54,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-22 09:26:54,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:26:54,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 1991 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-22 09:26:54,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 09:26:57,824 INFO L134 CoverageAnalysis]: Checked inductivity of 8487 backedges. 3476 proven. 435 refuted. 0 times theorem prover too weak. 4576 trivial. 0 not checked. [2021-12-22 09:26:57,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 09:26:59,823 INFO L134 CoverageAnalysis]: Checked inductivity of 8487 backedges. 3578 proven. 333 refuted. 0 times theorem prover too weak. 4576 trivial. 0 not checked. [2021-12-22 09:26:59,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92868151] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 09:26:59,824 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 09:26:59,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2021-12-22 09:26:59,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566951557] [2021-12-22 09:26:59,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 09:26:59,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-22 09:26:59,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:26:59,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-22 09:26:59,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-12-22 09:26:59,829 INFO L87 Difference]: Start difference. First operand 4988 states and 5127 transitions. Second operand has 15 states, 15 states have (on average 105.93333333333334) internal successors, (1589), 15 states have internal predecessors, (1589), 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) [2021-12-22 09:27:03,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:27:03,105 INFO L93 Difference]: Finished difference Result 14795 states and 15274 transitions. [2021-12-22 09:27:03,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 09:27:03,106 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 105.93333333333334) internal successors, (1589), 15 states have internal predecessors, (1589), 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 1632 [2021-12-22 09:27:03,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:27:03,107 INFO L225 Difference]: With dead ends: 14795 [2021-12-22 09:27:03,107 INFO L226 Difference]: Without dead ends: 0 [2021-12-22 09:27:03,111 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3286 GetRequests, 3264 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=168, Invalid=384, Unknown=0, NotChecked=0, Total=552 [2021-12-22 09:27:03,112 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 1179 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 5460 mSolverCounterSat, 230 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1179 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 6632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 230 IncrementalHoareTripleChecker+Valid, 5460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 942 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-12-22 09:27:03,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1179 Valid, 117 Invalid, 6632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [230 Valid, 5460 Invalid, 0 Unknown, 942 Unchecked, 3.0s Time] [2021-12-22 09:27:03,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-12-22 09:27:03,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-12-22 09:27:03,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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) [2021-12-22 09:27:03,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-12-22 09:27:03,113 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 1632 [2021-12-22 09:27:03,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:27:03,114 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-22 09:27:03,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 105.93333333333334) internal successors, (1589), 15 states have internal predecessors, (1589), 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) [2021-12-22 09:27:03,114 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-12-22 09:27:03,115 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-12-22 09:27:03,117 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-22 09:27:03,140 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-22 09:27:03,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-12-22 09:27:03,331 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.