./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-crafted/zero_sum_m5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-crafted/zero_sum_m5.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 afdb8b285c2183da613babde617c7580c3aee6b3bc694b080468400e828cda16 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 10:03:06,079 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 10:03:06,088 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 10:03:06,115 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 10:03:06,116 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 10:03:06,117 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 10:03:06,117 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 10:03:06,118 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 10:03:06,120 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 10:03:06,120 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 10:03:06,121 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 10:03:06,121 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 10:03:06,122 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 10:03:06,122 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 10:03:06,123 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 10:03:06,123 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 10:03:06,124 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 10:03:06,125 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 10:03:06,126 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 10:03:06,129 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 10:03:06,130 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 10:03:06,131 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 10:03:06,132 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 10:03:06,132 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 10:03:06,134 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 10:03:06,134 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 10:03:06,134 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 10:03:06,134 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 10:03:06,135 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 10:03:06,135 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 10:03:06,135 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 10:03:06,136 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 10:03:06,136 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 10:03:06,136 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 10:03:06,137 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 10:03:06,137 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 10:03:06,137 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 10:03:06,137 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 10:03:06,138 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 10:03:06,138 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 10:03:06,138 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 10:03:06,139 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 10:03:06,160 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 10:03:06,161 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 10:03:06,162 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 10:03:06,162 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 10:03:06,163 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 10:03:06,163 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 10:03:06,163 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 10:03:06,163 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 10:03:06,164 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 10:03:06,164 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 10:03:06,164 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 10:03:06,165 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 10:03:06,165 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 10:03:06,165 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 10:03:06,165 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 10:03:06,165 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 10:03:06,165 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 10:03:06,165 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 10:03:06,166 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 10:03:06,166 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 10:03:06,166 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 10:03:06,166 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 10:03:06,166 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 10:03:06,166 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 10:03:06,166 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 10:03:06,167 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 10:03:06,167 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 10:03:06,167 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 10:03:06,167 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 10:03:06,167 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 10:03:06,167 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 10:03:06,168 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 10:03:06,168 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 10:03:06,168 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 10:03:06,168 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> afdb8b285c2183da613babde617c7580c3aee6b3bc694b080468400e828cda16 [2021-12-21 10:03:06,326 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 10:03:06,348 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 10:03:06,350 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 10:03:06,351 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 10:03:06,353 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 10:03:06,354 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-crafted/zero_sum_m5.c [2021-12-21 10:03:06,413 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d9b0b3ea/dee2dd8344cc4a2b971eafae6a28bbc8/FLAG9071794e4 [2021-12-21 10:03:06,777 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 10:03:06,778 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum_m5.c [2021-12-21 10:03:06,787 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d9b0b3ea/dee2dd8344cc4a2b971eafae6a28bbc8/FLAG9071794e4 [2021-12-21 10:03:06,799 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d9b0b3ea/dee2dd8344cc4a2b971eafae6a28bbc8 [2021-12-21 10:03:06,801 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 10:03:06,803 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 10:03:06,804 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 10:03:06,804 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 10:03:06,806 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 10:03:06,807 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:03:06" (1/1) ... [2021-12-21 10:03:06,808 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6412dee8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:03:06, skipping insertion in model container [2021-12-21 10:03:06,808 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:03:06" (1/1) ... [2021-12-21 10:03:06,813 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 10:03:06,829 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 10:03:06,971 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/array-crafted/zero_sum_m5.c[402,415] [2021-12-21 10:03:07,001 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 10:03:07,005 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 10:03:07,013 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/array-crafted/zero_sum_m5.c[402,415] [2021-12-21 10:03:07,022 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 10:03:07,031 INFO L208 MainTranslator]: Completed translation [2021-12-21 10:03:07,031 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:03:07 WrapperNode [2021-12-21 10:03:07,032 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 10:03:07,032 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 10:03:07,033 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 10:03:07,033 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 10:03:07,037 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:03:07" (1/1) ... [2021-12-21 10:03:07,050 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:03:07" (1/1) ... [2021-12-21 10:03:07,065 INFO L137 Inliner]: procedures = 15, calls = 21, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 149 [2021-12-21 10:03:07,067 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 10:03:07,068 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 10:03:07,068 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 10:03:07,068 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 10:03:07,073 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:03:07" (1/1) ... [2021-12-21 10:03:07,074 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:03:07" (1/1) ... [2021-12-21 10:03:07,076 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:03:07" (1/1) ... [2021-12-21 10:03:07,076 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:03:07" (1/1) ... [2021-12-21 10:03:07,080 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:03:07" (1/1) ... [2021-12-21 10:03:07,086 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:03:07" (1/1) ... [2021-12-21 10:03:07,087 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:03:07" (1/1) ... [2021-12-21 10:03:07,088 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 10:03:07,089 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 10:03:07,089 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 10:03:07,089 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 10:03:07,090 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:03:07" (1/1) ... [2021-12-21 10:03:07,095 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 10:03:07,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:03:07,120 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-21 10:03:07,125 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 [2021-12-21 10:03:07,145 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 10:03:07,145 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 10:03:07,145 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-21 10:03:07,145 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-21 10:03:07,145 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 10:03:07,145 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 10:03:07,145 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-21 10:03:07,145 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-21 10:03:07,188 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 10:03:07,189 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 10:03:07,322 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 10:03:07,327 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 10:03:07,327 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-12-21 10:03:07,328 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:03:07 BoogieIcfgContainer [2021-12-21 10:03:07,328 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 10:03:07,329 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 10:03:07,329 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 10:03:07,344 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 10:03:07,344 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 10:03:06" (1/3) ... [2021-12-21 10:03:07,345 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60153653 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:03:07, skipping insertion in model container [2021-12-21 10:03:07,345 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:03:07" (2/3) ... [2021-12-21 10:03:07,345 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60153653 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:03:07, skipping insertion in model container [2021-12-21 10:03:07,345 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:03:07" (3/3) ... [2021-12-21 10:03:07,346 INFO L111 eAbstractionObserver]: Analyzing ICFG zero_sum_m5.c [2021-12-21 10:03:07,350 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 10:03:07,350 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 10:03:07,388 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 10:03:07,396 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-21 10:03:07,396 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 10:03:07,410 INFO L276 IsEmpty]: Start isEmpty. Operand has 44 states, 42 states have (on average 1.5952380952380953) internal successors, (67), 43 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:03:07,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-21 10:03:07,420 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:03:07,420 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] [2021-12-21 10:03:07,421 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:03:07,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:03:07,428 INFO L85 PathProgramCache]: Analyzing trace with hash 226651140, now seen corresponding path program 1 times [2021-12-21 10:03:07,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:03:07,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12732310] [2021-12-21 10:03:07,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:03:07,435 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:03:07,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:03:07,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:03:07,540 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:03:07,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12732310] [2021-12-21 10:03:07,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12732310] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:03:07,541 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:03:07,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 10:03:07,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508971297] [2021-12-21 10:03:07,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:03:07,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-21 10:03:07,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:03:07,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-21 10:03:07,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-21 10:03:07,575 INFO L87 Difference]: Start difference. First operand has 44 states, 42 states have (on average 1.5952380952380953) internal successors, (67), 43 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:03:07,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:03:07,587 INFO L93 Difference]: Finished difference Result 83 states and 126 transitions. [2021-12-21 10:03:07,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-21 10:03:07,588 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 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 27 [2021-12-21 10:03:07,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:03:07,594 INFO L225 Difference]: With dead ends: 83 [2021-12-21 10:03:07,594 INFO L226 Difference]: Without dead ends: 39 [2021-12-21 10:03:07,596 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-21 10:03:07,599 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 10:03:07,599 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 10:03:07,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-12-21 10:03:07,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-12-21 10:03:07,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.2894736842105263) internal successors, (49), 38 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:03:07,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 49 transitions. [2021-12-21 10:03:07,620 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 49 transitions. Word has length 27 [2021-12-21 10:03:07,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:03:07,620 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 49 transitions. [2021-12-21 10:03:07,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:03:07,621 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 49 transitions. [2021-12-21 10:03:07,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-21 10:03:07,621 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:03:07,621 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] [2021-12-21 10:03:07,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 10:03:07,622 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:03:07,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:03:07,622 INFO L85 PathProgramCache]: Analyzing trace with hash -833651044, now seen corresponding path program 1 times [2021-12-21 10:03:07,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:03:07,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765983172] [2021-12-21 10:03:07,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:03:07,623 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:03:07,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:03:07,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:03:07,669 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:03:07,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765983172] [2021-12-21 10:03:07,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765983172] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:03:07,670 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:03:07,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 10:03:07,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301422125] [2021-12-21 10:03:07,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:03:07,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:03:07,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:03:07,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:03:07,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:03:07,672 INFO L87 Difference]: Start difference. First operand 39 states and 49 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:03:07,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:03:07,705 INFO L93 Difference]: Finished difference Result 75 states and 95 transitions. [2021-12-21 10:03:07,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:03:07,706 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 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 27 [2021-12-21 10:03:07,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:03:07,706 INFO L225 Difference]: With dead ends: 75 [2021-12-21 10:03:07,706 INFO L226 Difference]: Without dead ends: 41 [2021-12-21 10:03:07,707 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:03:07,708 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 1 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 10:03:07,708 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 70 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 10:03:07,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-12-21 10:03:07,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2021-12-21 10:03:07,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.2820512820512822) internal successors, (50), 39 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:03:07,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2021-12-21 10:03:07,713 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 27 [2021-12-21 10:03:07,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:03:07,713 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2021-12-21 10:03:07,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:03:07,713 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2021-12-21 10:03:07,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-21 10:03:07,714 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:03:07,714 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:03:07,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 10:03:07,715 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:03:07,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:03:07,715 INFO L85 PathProgramCache]: Analyzing trace with hash 479992254, now seen corresponding path program 1 times [2021-12-21 10:03:07,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:03:07,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763008124] [2021-12-21 10:03:07,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:03:07,716 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:03:07,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:03:07,759 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 10:03:07,759 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:03:07,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763008124] [2021-12-21 10:03:07,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763008124] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:03:07,776 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:03:07,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 10:03:07,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42424106] [2021-12-21 10:03:07,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:03:07,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:03:07,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:03:07,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:03:07,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:03:07,778 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:03:07,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:03:07,907 INFO L93 Difference]: Finished difference Result 91 states and 119 transitions. [2021-12-21 10:03:07,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:03:07,908 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-12-21 10:03:07,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:03:07,909 INFO L225 Difference]: With dead ends: 91 [2021-12-21 10:03:07,910 INFO L226 Difference]: Without dead ends: 60 [2021-12-21 10:03:07,911 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:03:07,911 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 63 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 10:03:07,912 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 21 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 10:03:07,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-12-21 10:03:07,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 50. [2021-12-21 10:03:07,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.2244897959183674) internal successors, (60), 49 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:03:07,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2021-12-21 10:03:07,918 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 29 [2021-12-21 10:03:07,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:03:07,919 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2021-12-21 10:03:07,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:03:07,919 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2021-12-21 10:03:07,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-21 10:03:07,920 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:03:07,920 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:03:07,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 10:03:07,920 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:03:07,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:03:07,921 INFO L85 PathProgramCache]: Analyzing trace with hash -509099182, now seen corresponding path program 1 times [2021-12-21 10:03:07,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:03:07,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953308001] [2021-12-21 10:03:07,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:03:07,922 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:03:07,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:03:07,997 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-21 10:03:07,998 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:03:07,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953308001] [2021-12-21 10:03:07,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953308001] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:03:07,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731346138] [2021-12-21 10:03:07,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:03:07,998 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:03:07,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:03:08,001 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 10:03:08,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-21 10:03:08,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:03:08,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-21 10:03:08,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:03:08,211 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-21 10:03:08,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 10:03:08,316 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-21 10:03:08,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731346138] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 10:03:08,317 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 10:03:08,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-12-21 10:03:08,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904162997] [2021-12-21 10:03:08,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 10:03:08,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 10:03:08,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:03:08,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 10:03:08,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-12-21 10:03:08,323 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:03:08,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:03:08,381 INFO L93 Difference]: Finished difference Result 97 states and 117 transitions. [2021-12-21 10:03:08,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 10:03:08,381 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-12-21 10:03:08,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:03:08,382 INFO L225 Difference]: With dead ends: 97 [2021-12-21 10:03:08,382 INFO L226 Difference]: Without dead ends: 53 [2021-12-21 10:03:08,383 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-12-21 10:03:08,389 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 2 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 10:03:08,390 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 116 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 10:03:08,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-12-21 10:03:08,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2021-12-21 10:03:08,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.2156862745098038) internal successors, (62), 51 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:03:08,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 62 transitions. [2021-12-21 10:03:08,406 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 62 transitions. Word has length 49 [2021-12-21 10:03:08,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:03:08,407 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 62 transitions. [2021-12-21 10:03:08,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:03:08,407 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 62 transitions. [2021-12-21 10:03:08,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-21 10:03:08,409 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:03:08,410 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-21 10:03:08,429 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-21 10:03:08,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:03:08,623 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:03:08,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:03:08,624 INFO L85 PathProgramCache]: Analyzing trace with hash 290748660, now seen corresponding path program 2 times [2021-12-21 10:03:08,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:03:08,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896057211] [2021-12-21 10:03:08,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:03:08,625 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:03:08,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:03:08,679 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-21 10:03:08,680 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:03:08,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896057211] [2021-12-21 10:03:08,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896057211] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:03:08,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779797321] [2021-12-21 10:03:08,681 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 10:03:08,681 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:03:08,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:03:08,682 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) [2021-12-21 10:03:08,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-21 10:03:08,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 10:03:08,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 10:03:08,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-21 10:03:08,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:03:08,869 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-21 10:03:08,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 10:03:08,950 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-21 10:03:08,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779797321] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 10:03:08,951 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 10:03:08,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2021-12-21 10:03:08,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78939256] [2021-12-21 10:03:08,951 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 10:03:08,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 10:03:08,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:03:08,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 10:03:08,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-12-21 10:03:08,952 INFO L87 Difference]: Start difference. First operand 52 states and 62 transitions. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:03:09,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:03:09,087 INFO L93 Difference]: Finished difference Result 122 states and 150 transitions. [2021-12-21 10:03:09,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 10:03:09,088 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 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 51 [2021-12-21 10:03:09,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:03:09,088 INFO L225 Difference]: With dead ends: 122 [2021-12-21 10:03:09,088 INFO L226 Difference]: Without dead ends: 82 [2021-12-21 10:03:09,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 97 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2021-12-21 10:03:09,089 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 36 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 10:03:09,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 33 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 10:03:09,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-12-21 10:03:09,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 72. [2021-12-21 10:03:09,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.1549295774647887) internal successors, (82), 71 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:03:09,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 82 transitions. [2021-12-21 10:03:09,094 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 82 transitions. Word has length 51 [2021-12-21 10:03:09,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:03:09,094 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 82 transitions. [2021-12-21 10:03:09,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:03:09,095 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 82 transitions. [2021-12-21 10:03:09,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-21 10:03:09,096 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:03:09,096 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:03:09,114 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-21 10:03:09,312 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 [2021-12-21 10:03:09,312 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:03:09,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:03:09,313 INFO L85 PathProgramCache]: Analyzing trace with hash -813057144, now seen corresponding path program 3 times [2021-12-21 10:03:09,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:03:09,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147270017] [2021-12-21 10:03:09,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:03:09,313 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:03:09,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:03:11,547 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:03:11,547 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:03:11,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147270017] [2021-12-21 10:03:11,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147270017] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:03:11,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284038501] [2021-12-21 10:03:11,548 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-21 10:03:11,548 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:03:11,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:03:11,549 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) [2021-12-21 10:03:11,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-21 10:03:11,605 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-21 10:03:11,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 10:03:11,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 100 conjunts are in the unsatisfiable core [2021-12-21 10:03:11,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:03:21,837 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:03:21,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 10:03:46,989 INFO L353 Elim1Store]: treesize reduction 68, result has 67.8 percent of original size [2021-12-21 10:03:46,989 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 106 treesize of output 165 [2021-12-21 10:03:54,105 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:03:54,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284038501] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 10:03:54,106 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 10:03:54,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 56, 53] total 141 [2021-12-21 10:03:54,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827167135] [2021-12-21 10:03:54,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 10:03:54,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 141 states [2021-12-21 10:03:54,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:03:54,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 141 interpolants. [2021-12-21 10:03:54,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=833, Invalid=18906, Unknown=1, NotChecked=0, Total=19740 [2021-12-21 10:03:54,113 INFO L87 Difference]: Start difference. First operand 72 states and 82 transitions. Second operand has 141 states, 141 states have (on average 1.3971631205673758) internal successors, (197), 141 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) [2021-12-21 10:04:11,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:04:11,344 INFO L93 Difference]: Finished difference Result 190 states and 219 transitions. [2021-12-21 10:04:11,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-12-21 10:04:11,345 INFO L78 Accepts]: Start accepts. Automaton has has 141 states, 141 states have (on average 1.3971631205673758) internal successors, (197), 141 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 71 [2021-12-21 10:04:11,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:04:11,349 INFO L225 Difference]: With dead ends: 190 [2021-12-21 10:04:11,349 INFO L226 Difference]: Without dead ends: 186 [2021-12-21 10:04:11,356 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 36 SyntacticMatches, 32 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12061 ImplicationChecksByTransitivity, 43.7s TimeCoverageRelationStatistics Valid=1520, Invalid=39485, Unknown=1, NotChecked=0, Total=41006 [2021-12-21 10:04:11,357 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 86 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 1030 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 3724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1030 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2660 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-21 10:04:11,358 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 335 Invalid, 3724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1030 Invalid, 0 Unknown, 2660 Unchecked, 0.5s Time] [2021-12-21 10:04:11,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-12-21 10:04:11,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 125. [2021-12-21 10:04:11,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.1612903225806452) internal successors, (144), 124 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:04:11,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 144 transitions. [2021-12-21 10:04:11,374 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 144 transitions. Word has length 71 [2021-12-21 10:04:11,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:04:11,375 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 144 transitions. [2021-12-21 10:04:11,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 141 states, 141 states have (on average 1.3971631205673758) internal successors, (197), 141 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) [2021-12-21 10:04:11,375 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 144 transitions. [2021-12-21 10:04:11,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-21 10:04:11,376 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:04:11,376 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-12-21 10:04:11,393 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-21 10:04:11,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:04:11,577 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:04:11,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:04:11,578 INFO L85 PathProgramCache]: Analyzing trace with hash 1767165226, now seen corresponding path program 4 times [2021-12-21 10:04:11,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:04:11,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607093022] [2021-12-21 10:04:11,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:04:11,578 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:04:11,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:04:11,656 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-21 10:04:11,657 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:04:11,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607093022] [2021-12-21 10:04:11,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607093022] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:04:11,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653626580] [2021-12-21 10:04:11,657 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-21 10:04:11,657 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:04:11,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:04:11,659 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) [2021-12-21 10:04:11,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-21 10:04:11,709 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-21 10:04:11,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 10:04:11,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-21 10:04:11,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:04:11,847 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-21 10:04:11,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 10:04:11,945 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-21 10:04:11,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653626580] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 10:04:11,945 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 10:04:11,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2021-12-21 10:04:11,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730312999] [2021-12-21 10:04:11,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 10:04:11,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-21 10:04:11,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:04:11,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-21 10:04:11,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-12-21 10:04:11,947 INFO L87 Difference]: Start difference. First operand 125 states and 144 transitions. Second operand has 14 states, 14 states have (on average 4.785714285714286) internal successors, (67), 14 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:04:12,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:04:12,188 INFO L93 Difference]: Finished difference Result 248 states and 286 transitions. [2021-12-21 10:04:12,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-21 10:04:12,189 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.785714285714286) internal successors, (67), 14 states have internal predecessors, (67), 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 73 [2021-12-21 10:04:12,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:04:12,189 INFO L225 Difference]: With dead ends: 248 [2021-12-21 10:04:12,190 INFO L226 Difference]: Without dead ends: 128 [2021-12-21 10:04:12,190 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 140 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-12-21 10:04:12,191 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 136 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 10:04:12,191 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 110 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 10:04:12,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-12-21 10:04:12,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 127. [2021-12-21 10:04:12,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 1.1587301587301588) internal successors, (146), 126 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:04:12,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 146 transitions. [2021-12-21 10:04:12,204 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 146 transitions. Word has length 73 [2021-12-21 10:04:12,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:04:12,204 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 146 transitions. [2021-12-21 10:04:12,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.785714285714286) internal successors, (67), 14 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:04:12,205 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 146 transitions. [2021-12-21 10:04:12,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-21 10:04:12,205 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:04:12,205 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2021-12-21 10:04:12,225 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-21 10:04:12,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:04:12,419 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:04:12,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:04:12,420 INFO L85 PathProgramCache]: Analyzing trace with hash 570637516, now seen corresponding path program 5 times [2021-12-21 10:04:12,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:04:12,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525811938] [2021-12-21 10:04:12,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:04:12,421 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:04:12,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:04:12,470 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-12-21 10:04:12,470 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:04:12,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525811938] [2021-12-21 10:04:12,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525811938] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:04:12,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076895548] [2021-12-21 10:04:12,471 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-21 10:04:12,471 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:04:12,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:04:12,472 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) [2021-12-21 10:04:12,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-21 10:04:12,559 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-12-21 10:04:12,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 10:04:12,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-21 10:04:12,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:04:12,705 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-12-21 10:04:12,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 10:04:12,824 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-12-21 10:04:12,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076895548] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 10:04:12,824 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 10:04:12,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2021-12-21 10:04:12,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894995827] [2021-12-21 10:04:12,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 10:04:12,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-21 10:04:12,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:04:12,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-21 10:04:12,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-12-21 10:04:12,826 INFO L87 Difference]: Start difference. First operand 127 states and 146 transitions. Second operand has 14 states, 14 states have (on average 7.285714285714286) internal successors, (102), 14 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:04:13,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:04:13,027 INFO L93 Difference]: Finished difference Result 209 states and 245 transitions. [2021-12-21 10:04:13,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-21 10:04:13,027 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 7.285714285714286) internal successors, (102), 14 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-12-21 10:04:13,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:04:13,028 INFO L225 Difference]: With dead ends: 209 [2021-12-21 10:04:13,028 INFO L226 Difference]: Without dead ends: 104 [2021-12-21 10:04:13,029 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 143 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-12-21 10:04:13,029 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 192 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 10:04:13,029 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 44 Invalid, 424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 10:04:13,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-12-21 10:04:13,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 94. [2021-12-21 10:04:13,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 1.118279569892473) internal successors, (104), 93 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:04:13,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 104 transitions. [2021-12-21 10:04:13,037 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 104 transitions. Word has length 75 [2021-12-21 10:04:13,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:04:13,038 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 104 transitions. [2021-12-21 10:04:13,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.285714285714286) internal successors, (102), 14 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:04:13,038 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 104 transitions. [2021-12-21 10:04:13,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-21 10:04:13,039 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:04:13,039 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:04:13,057 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-21 10:04:13,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:04:13,243 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:04:13,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:04:13,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1413596990, now seen corresponding path program 6 times [2021-12-21 10:04:13,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:04:13,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326688437] [2021-12-21 10:04:13,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:04:13,244 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:04:13,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat