./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-crafted/zero_sum4.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 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_sum4.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 ca2dcd06e0389cf665904adfee9ccd6a1a268c87541d3b3b3e0bcffb3a75664e --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 23:53:57,638 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 23:53:57,653 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 23:53:57,701 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 23:53:57,701 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 23:53:57,702 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 23:53:57,703 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 23:53:57,704 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 23:53:57,705 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 23:53:57,707 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 23:53:57,708 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 23:53:57,720 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 23:53:57,721 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 23:53:57,721 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 23:53:57,722 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 23:53:57,723 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 23:53:57,724 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 23:53:57,724 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 23:53:57,725 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 23:53:57,727 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 23:53:57,727 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 23:53:57,734 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 23:53:57,735 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 23:53:57,735 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 23:53:57,737 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 23:53:57,741 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 23:53:57,741 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 23:53:57,742 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 23:53:57,743 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 23:53:57,743 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 23:53:57,743 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 23:53:57,744 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 23:53:57,745 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 23:53:57,745 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 23:53:57,746 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 23:53:57,746 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 23:53:57,746 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 23:53:57,747 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 23:53:57,747 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 23:53:57,747 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 23:53:57,748 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 23:53:57,753 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-16 23:53:57,781 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 23:53:57,783 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 23:53:57,784 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 23:53:57,784 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 23:53:57,785 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 23:53:57,785 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 23:53:57,785 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 23:53:57,785 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 23:53:57,786 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 23:53:57,786 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 23:53:57,787 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-16 23:53:57,787 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 23:53:57,787 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-16 23:53:57,787 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 23:53:57,787 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-16 23:53:57,787 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 23:53:57,787 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-16 23:53:57,788 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-16 23:53:57,788 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-16 23:53:57,788 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 23:53:57,788 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-16 23:53:57,788 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 23:53:57,788 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 23:53:57,789 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 23:53:57,789 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 23:53:57,789 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 23:53:57,789 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 23:53:57,789 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-16 23:53:57,789 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-16 23:53:57,789 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-16 23:53:57,790 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-16 23:53:57,790 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-16 23:53:57,790 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-16 23:53:57,790 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 23:53:57,790 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ca2dcd06e0389cf665904adfee9ccd6a1a268c87541d3b3b3e0bcffb3a75664e [2021-12-16 23:53:57,976 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 23:53:57,998 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 23:53:58,000 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 23:53:58,001 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 23:53:58,002 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 23:53:58,003 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-crafted/zero_sum4.c [2021-12-16 23:53:58,049 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/134c4bfa5/0c80ad28632d4b0391b61379dfbcf1b7/FLAG8045ce461 [2021-12-16 23:53:58,394 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 23:53:58,395 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum4.c [2021-12-16 23:53:58,401 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/134c4bfa5/0c80ad28632d4b0391b61379dfbcf1b7/FLAG8045ce461 [2021-12-16 23:53:58,409 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/134c4bfa5/0c80ad28632d4b0391b61379dfbcf1b7 [2021-12-16 23:53:58,411 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 23:53:58,412 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 23:53:58,414 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 23:53:58,414 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 23:53:58,429 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 23:53:58,430 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 11:53:58" (1/1) ... [2021-12-16 23:53:58,430 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3adf71c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 11:53:58, skipping insertion in model container [2021-12-16 23:53:58,431 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 11:53:58" (1/1) ... [2021-12-16 23:53:58,435 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 23:53:58,449 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 23:53:58,560 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_sum4.c[400,413] [2021-12-16 23:53:58,596 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 23:53:58,607 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 23:53:58,618 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_sum4.c[400,413] [2021-12-16 23:53:58,638 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 23:53:58,654 INFO L208 MainTranslator]: Completed translation [2021-12-16 23:53:58,654 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 11:53:58 WrapperNode [2021-12-16 23:53:58,654 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 23:53:58,655 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 23:53:58,655 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 23:53:58,655 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 23:53:58,660 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 11:53:58" (1/1) ... [2021-12-16 23:53:58,672 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 11:53:58" (1/1) ... [2021-12-16 23:53:58,695 INFO L137 Inliner]: procedures = 15, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 127 [2021-12-16 23:53:58,695 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 23:53:58,696 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 23:53:58,696 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 23:53:58,696 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 23:53:58,702 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 11:53:58" (1/1) ... [2021-12-16 23:53:58,703 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 11:53:58" (1/1) ... [2021-12-16 23:53:58,706 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 11:53:58" (1/1) ... [2021-12-16 23:53:58,707 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 11:53:58" (1/1) ... [2021-12-16 23:53:58,721 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 11:53:58" (1/1) ... [2021-12-16 23:53:58,725 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 11:53:58" (1/1) ... [2021-12-16 23:53:58,726 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 11:53:58" (1/1) ... [2021-12-16 23:53:58,728 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 23:53:58,728 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 23:53:58,729 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 23:53:58,729 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 23:53:58,730 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 11:53:58" (1/1) ... [2021-12-16 23:53:58,735 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 23:53:58,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 23:53:58,757 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) [2021-12-16 23:53:58,761 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 [2021-12-16 23:53:58,790 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-16 23:53:58,790 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-16 23:53:58,790 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-16 23:53:58,790 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-16 23:53:58,791 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 23:53:58,791 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 23:53:58,791 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-16 23:53:58,791 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-16 23:53:58,835 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 23:53:58,836 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 23:53:58,951 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 23:53:58,956 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 23:53:58,956 INFO L301 CfgBuilder]: Removed 9 assume(true) statements. [2021-12-16 23:53:58,957 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 11:53:58 BoogieIcfgContainer [2021-12-16 23:53:58,957 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 23:53:58,958 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-16 23:53:58,959 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-16 23:53:58,961 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-16 23:53:58,961 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 11:53:58" (1/3) ... [2021-12-16 23:53:58,962 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e4b5ce7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 11:53:58, skipping insertion in model container [2021-12-16 23:53:58,962 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 11:53:58" (2/3) ... [2021-12-16 23:53:58,962 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e4b5ce7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 11:53:58, skipping insertion in model container [2021-12-16 23:53:58,962 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 11:53:58" (3/3) ... [2021-12-16 23:53:58,963 INFO L111 eAbstractionObserver]: Analyzing ICFG zero_sum4.c [2021-12-16 23:53:58,967 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-16 23:53:58,967 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-16 23:53:58,998 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-16 23:53:59,003 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 [2021-12-16 23:53:59,004 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-16 23:53:59,014 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 36 states have (on average 1.5833333333333333) internal successors, (57), 37 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:53:59,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-16 23:53:59,019 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:53:59,019 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] [2021-12-16 23:53:59,020 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:53:59,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:53:59,024 INFO L85 PathProgramCache]: Analyzing trace with hash -2094998668, now seen corresponding path program 1 times [2021-12-16 23:53:59,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 23:53:59,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353310397] [2021-12-16 23:53:59,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:53:59,031 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 23:53:59,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:53:59,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:53:59,147 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 23:53:59,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353310397] [2021-12-16 23:53:59,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353310397] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 23:53:59,148 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 23:53:59,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-16 23:53:59,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101441184] [2021-12-16 23:53:59,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 23:53:59,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-16 23:53:59,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 23:53:59,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-16 23:53:59,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-16 23:53:59,176 INFO L87 Difference]: Start difference. First operand has 38 states, 36 states have (on average 1.5833333333333333) internal successors, (57), 37 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 11.5) internal successors, (23), 2 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:53:59,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:53:59,197 INFO L93 Difference]: Finished difference Result 71 states and 106 transitions. [2021-12-16 23:53:59,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-16 23:53:59,200 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 11.5) internal successors, (23), 2 states have internal predecessors, (23), 0 states have call successors, (0), 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 23 [2021-12-16 23:53:59,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:53:59,205 INFO L225 Difference]: With dead ends: 71 [2021-12-16 23:53:59,206 INFO L226 Difference]: Without dead ends: 33 [2021-12-16 23:53:59,208 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 [2021-12-16 23:53:59,212 INFO L933 BasicCegarLoop]: 47 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, 47 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 [2021-12-16 23:53:59,214 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 23:53:59,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-12-16 23:53:59,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-12-16 23:53:59,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.28125) internal successors, (41), 32 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:53:59,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 41 transitions. [2021-12-16 23:53:59,247 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 41 transitions. Word has length 23 [2021-12-16 23:53:59,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:53:59,248 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 41 transitions. [2021-12-16 23:53:59,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 11.5) internal successors, (23), 2 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:53:59,248 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 41 transitions. [2021-12-16 23:53:59,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-16 23:53:59,249 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:53:59,249 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] [2021-12-16 23:53:59,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-16 23:53:59,250 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:53:59,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:53:59,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1680934388, now seen corresponding path program 1 times [2021-12-16 23:53:59,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 23:53:59,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832671287] [2021-12-16 23:53:59,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:53:59,254 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 23:53:59,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:53:59,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:53:59,349 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 23:53:59,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832671287] [2021-12-16 23:53:59,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832671287] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 23:53:59,349 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 23:53:59,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 23:53:59,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285021958] [2021-12-16 23:53:59,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 23:53:59,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 23:53:59,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 23:53:59,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 23:53:59,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 23:53:59,354 INFO L87 Difference]: Start difference. First operand 33 states and 41 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:53:59,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:53:59,398 INFO L93 Difference]: Finished difference Result 63 states and 79 transitions. [2021-12-16 23:53:59,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 23:53:59,399 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 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 23 [2021-12-16 23:53:59,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:53:59,401 INFO L225 Difference]: With dead ends: 63 [2021-12-16 23:53:59,401 INFO L226 Difference]: Without dead ends: 35 [2021-12-16 23:53:59,402 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 [2021-12-16 23:53:59,410 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 1 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 23:53:59,411 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 58 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 23:53:59,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-12-16 23:53:59,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2021-12-16 23:53:59,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 33 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:53:59,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2021-12-16 23:53:59,451 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 23 [2021-12-16 23:53:59,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:53:59,451 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2021-12-16 23:53:59,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:53:59,452 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2021-12-16 23:53:59,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-16 23:53:59,462 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:53:59,463 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] [2021-12-16 23:53:59,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-16 23:53:59,467 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:53:59,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:53:59,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1381660206, now seen corresponding path program 1 times [2021-12-16 23:53:59,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 23:53:59,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144927990] [2021-12-16 23:53:59,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:53:59,469 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 23:53:59,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:53:59,505 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 23:53:59,505 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 23:53:59,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144927990] [2021-12-16 23:53:59,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144927990] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 23:53:59,506 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 23:53:59,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 23:53:59,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367602944] [2021-12-16 23:53:59,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 23:53:59,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 23:53:59,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 23:53:59,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 23:53:59,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-16 23:53:59,508 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:53:59,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:53:59,606 INFO L93 Difference]: Finished difference Result 75 states and 97 transitions. [2021-12-16 23:53:59,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 23:53:59,607 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 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 25 [2021-12-16 23:53:59,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:53:59,608 INFO L225 Difference]: With dead ends: 75 [2021-12-16 23:53:59,608 INFO L226 Difference]: Without dead ends: 50 [2021-12-16 23:53:59,608 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 [2021-12-16 23:53:59,609 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 51 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 23:53:59,611 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 19 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 23:53:59,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-12-16 23:53:59,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2021-12-16 23:53:59,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.2195121951219512) internal successors, (50), 41 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) [2021-12-16 23:53:59,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2021-12-16 23:53:59,619 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 25 [2021-12-16 23:53:59,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:53:59,619 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2021-12-16 23:53:59,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:53:59,619 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2021-12-16 23:53:59,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-16 23:53:59,620 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:53:59,620 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] [2021-12-16 23:53:59,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-16 23:53:59,621 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:53:59,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:53:59,622 INFO L85 PathProgramCache]: Analyzing trace with hash -158323138, now seen corresponding path program 1 times [2021-12-16 23:53:59,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 23:53:59,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116196547] [2021-12-16 23:53:59,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:53:59,622 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 23:53:59,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:53:59,679 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-16 23:53:59,679 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 23:53:59,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116196547] [2021-12-16 23:53:59,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116196547] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 23:53:59,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664312569] [2021-12-16 23:53:59,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:53:59,680 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:53:59,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 23:53:59,682 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) [2021-12-16 23:53:59,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-16 23:53:59,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:53:59,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-16 23:53:59,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 23:53:59,822 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-16 23:53:59,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 23:53:59,893 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-16 23:53:59,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664312569] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 23:53:59,893 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 23:53:59,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-12-16 23:53:59,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431628567] [2021-12-16 23:53:59,894 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 23:53:59,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 23:53:59,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 23:53:59,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 23:53:59,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-12-16 23:53:59,895 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:53:59,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:53:59,926 INFO L93 Difference]: Finished difference Result 81 states and 97 transitions. [2021-12-16 23:53:59,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 23:53:59,927 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 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 41 [2021-12-16 23:53:59,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:53:59,927 INFO L225 Difference]: With dead ends: 81 [2021-12-16 23:53:59,927 INFO L226 Difference]: Without dead ends: 45 [2021-12-16 23:53:59,928 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-12-16 23:53:59,928 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 2 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 23:53:59,929 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 77 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 23:53:59,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-12-16 23:53:59,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2021-12-16 23:53:59,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.2093023255813953) internal successors, (52), 43 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:53:59,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2021-12-16 23:53:59,933 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 41 [2021-12-16 23:53:59,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:53:59,933 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2021-12-16 23:53:59,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:53:59,933 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2021-12-16 23:53:59,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-16 23:53:59,934 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:53:59,934 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] [2021-12-16 23:53:59,976 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-16 23:54:00,148 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 [2021-12-16 23:54:00,148 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:54:00,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:54:00,149 INFO L85 PathProgramCache]: Analyzing trace with hash 408266208, now seen corresponding path program 2 times [2021-12-16 23:54:00,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 23:54:00,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512575240] [2021-12-16 23:54:00,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:54:00,149 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 23:54:00,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:54:00,219 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-16 23:54:00,221 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 23:54:00,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512575240] [2021-12-16 23:54:00,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512575240] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 23:54:00,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726411551] [2021-12-16 23:54:00,221 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 23:54:00,222 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:54:00,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 23:54:00,223 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) [2021-12-16 23:54:00,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-16 23:54:00,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 23:54:00,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 23:54:00,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-16 23:54:00,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 23:54:00,387 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-16 23:54:00,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 23:54:00,461 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-16 23:54:00,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726411551] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 23:54:00,461 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 23:54:00,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2021-12-16 23:54:00,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090407553] [2021-12-16 23:54:00,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 23:54:00,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-16 23:54:00,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 23:54:00,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-16 23:54:00,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-12-16 23:54:00,463 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand has 8 states, 8 states have (on average 9.125) internal successors, (73), 8 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:54:00,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:54:00,552 INFO L93 Difference]: Finished difference Result 100 states and 122 transitions. [2021-12-16 23:54:00,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 23:54:00,552 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.125) internal successors, (73), 8 states have internal predecessors, (73), 0 states have call successors, (0), 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 43 [2021-12-16 23:54:00,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:54:00,553 INFO L225 Difference]: With dead ends: 100 [2021-12-16 23:54:00,553 INFO L226 Difference]: Without dead ends: 68 [2021-12-16 23:54:00,554 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 81 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2021-12-16 23:54:00,554 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 44 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 23:54:00,554 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 27 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 23:54:00,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-12-16 23:54:00,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 60. [2021-12-16 23:54:00,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.152542372881356) internal successors, (68), 59 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:54:00,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 68 transitions. [2021-12-16 23:54:00,559 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 68 transitions. Word has length 43 [2021-12-16 23:54:00,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:54:00,559 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 68 transitions. [2021-12-16 23:54:00,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.125) internal successors, (73), 8 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:54:00,560 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 68 transitions. [2021-12-16 23:54:00,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-16 23:54:00,561 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:54:00,561 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-16 23:54:00,578 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-16 23:54:00,767 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 [2021-12-16 23:54:00,768 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:54:00,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:54:00,769 INFO L85 PathProgramCache]: Analyzing trace with hash -1004340752, now seen corresponding path program 3 times [2021-12-16 23:54:00,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 23:54:00,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836639557] [2021-12-16 23:54:00,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:54:00,769 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 23:54:00,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:54:02,147 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:54:02,148 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 23:54:02,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836639557] [2021-12-16 23:54:02,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836639557] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 23:54:02,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024735585] [2021-12-16 23:54:02,148 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 23:54:02,149 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:54:02,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 23:54:02,150 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) [2021-12-16 23:54:02,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-16 23:54:02,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-16 23:54:02,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 23:54:02,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 83 conjunts are in the unsatisfiable core [2021-12-16 23:54:02,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 23:54:03,744 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 23:54:03,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 16 [2021-12-16 23:54:03,876 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:54:03,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 23:54:10,785 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 23:54:10,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 103 [2021-12-16 23:54:11,667 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:54:11,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024735585] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 23:54:11,667 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 23:54:11,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 27, 29] total 65 [2021-12-16 23:54:11,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544795526] [2021-12-16 23:54:11,668 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 23:54:11,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2021-12-16 23:54:11,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 23:54:11,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-12-16 23:54:11,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=415, Invalid=3745, Unknown=0, NotChecked=0, Total=4160 [2021-12-16 23:54:11,671 INFO L87 Difference]: Start difference. First operand 60 states and 68 transitions. Second operand has 65 states, 65 states have (on average 2.6) internal successors, (169), 65 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:54:14,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:54:14,076 INFO L93 Difference]: Finished difference Result 211 states and 245 transitions. [2021-12-16 23:54:14,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-12-16 23:54:14,077 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.6) internal successors, (169), 65 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-12-16 23:54:14,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:54:14,079 INFO L225 Difference]: With dead ends: 211 [2021-12-16 23:54:14,079 INFO L226 Difference]: Without dead ends: 206 [2021-12-16 23:54:14,081 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 61 SyntacticMatches, 54 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 8 DeprecatedPredicates, 4449 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=962, Invalid=8740, Unknown=0, NotChecked=0, Total=9702 [2021-12-16 23:54:14,082 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 132 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 1604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1019 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 23:54:14,082 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 116 Invalid, 1604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 465 Invalid, 0 Unknown, 1019 Unchecked, 0.3s Time] [2021-12-16 23:54:14,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-12-16 23:54:14,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 101. [2021-12-16 23:54:14,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.16) internal successors, (116), 100 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:54:14,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 116 transitions. [2021-12-16 23:54:14,099 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 116 transitions. Word has length 59 [2021-12-16 23:54:14,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:54:14,100 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 116 transitions. [2021-12-16 23:54:14,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.6) internal successors, (169), 65 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:54:14,101 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 116 transitions. [2021-12-16 23:54:14,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-16 23:54:14,102 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:54:14,102 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-12-16 23:54:14,120 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-16 23:54:14,315 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 [2021-12-16 23:54:14,316 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:54:14,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:54:14,316 INFO L85 PathProgramCache]: Analyzing trace with hash -1580077422, now seen corresponding path program 4 times [2021-12-16 23:54:14,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 23:54:14,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096032572] [2021-12-16 23:54:14,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:54:14,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 23:54:14,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:54:14,381 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-16 23:54:14,382 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 23:54:14,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096032572] [2021-12-16 23:54:14,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096032572] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 23:54:14,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767732751] [2021-12-16 23:54:14,383 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-16 23:54:14,383 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:54:14,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 23:54:14,384 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) [2021-12-16 23:54:14,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-16 23:54:14,428 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-16 23:54:14,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 23:54:14,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-16 23:54:14,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 23:54:14,553 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-16 23:54:14,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 23:54:14,647 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-16 23:54:14,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767732751] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 23:54:14,647 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 23:54:14,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2021-12-16 23:54:14,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110935360] [2021-12-16 23:54:14,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 23:54:14,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-16 23:54:14,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 23:54:14,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-16 23:54:14,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-12-16 23:54:14,649 INFO L87 Difference]: Start difference. First operand 101 states and 116 transitions. Second operand has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:54:14,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:54:14,821 INFO L93 Difference]: Finished difference Result 200 states and 230 transitions. [2021-12-16 23:54:14,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-16 23:54:14,822 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-12-16 23:54:14,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:54:14,822 INFO L225 Difference]: With dead ends: 200 [2021-12-16 23:54:14,822 INFO L226 Difference]: Without dead ends: 104 [2021-12-16 23:54:14,823 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-12-16 23:54:14,823 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 117 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 23:54:14,823 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 97 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 23:54:14,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-12-16 23:54:14,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2021-12-16 23:54:14,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.1568627450980393) internal successors, (118), 102 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:54:14,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 118 transitions. [2021-12-16 23:54:14,835 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 118 transitions. Word has length 61 [2021-12-16 23:54:14,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:54:14,835 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 118 transitions. [2021-12-16 23:54:14,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:54:14,835 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 118 transitions. [2021-12-16 23:54:14,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-16 23:54:14,836 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:54:14,836 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2021-12-16 23:54:14,854 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-16 23:54:15,053 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 [2021-12-16 23:54:15,054 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:54:15,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:54:15,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1107378484, now seen corresponding path program 5 times [2021-12-16 23:54:15,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 23:54:15,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784342426] [2021-12-16 23:54:15,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:54:15,055 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 23:54:15,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:54:15,103 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-12-16 23:54:15,104 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 23:54:15,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784342426] [2021-12-16 23:54:15,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784342426] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 23:54:15,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502206361] [2021-12-16 23:54:15,104 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-16 23:54:15,104 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:54:15,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 23:54:15,106 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) [2021-12-16 23:54:15,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-16 23:54:15,182 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-12-16 23:54:15,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 23:54:15,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-16 23:54:15,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 23:54:15,298 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-12-16 23:54:15,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 23:54:15,419 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-12-16 23:54:15,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502206361] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 23:54:15,427 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 23:54:15,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2021-12-16 23:54:15,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564460981] [2021-12-16 23:54:15,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 23:54:15,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-16 23:54:15,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 23:54:15,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-16 23:54:15,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-12-16 23:54:15,428 INFO L87 Difference]: Start difference. First operand 103 states and 118 transitions. Second operand has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:54:15,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:54:15,629 INFO L93 Difference]: Finished difference Result 167 states and 195 transitions. [2021-12-16 23:54:15,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-16 23:54:15,630 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 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 63 [2021-12-16 23:54:15,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:54:15,630 INFO L225 Difference]: With dead ends: 167 [2021-12-16 23:54:15,631 INFO L226 Difference]: Without dead ends: 86 [2021-12-16 23:54:15,631 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 119 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-12-16 23:54:15,631 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 105 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 23:54:15,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 47 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 23:54:15,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-12-16 23:54:15,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 78. [2021-12-16 23:54:15,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.1168831168831168) internal successors, (86), 77 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:54:15,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 86 transitions. [2021-12-16 23:54:15,636 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 86 transitions. Word has length 63 [2021-12-16 23:54:15,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:54:15,636 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 86 transitions. [2021-12-16 23:54:15,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:54:15,636 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 86 transitions. [2021-12-16 23:54:15,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-16 23:54:15,637 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:54:15,637 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-16 23:54:15,654 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-16 23:54:15,843 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 [2021-12-16 23:54:15,843 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:54:15,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:54:15,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1152417058, now seen corresponding path program 6 times [2021-12-16 23:54:15,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 23:54:15,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087049803] [2021-12-16 23:54:15,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:54:15,844 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 23:54:15,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:54:17,919 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:54:17,920 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 23:54:17,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087049803] [2021-12-16 23:54:17,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087049803] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 23:54:17,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327679553] [2021-12-16 23:54:17,920 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-16 23:54:17,920 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:54:17,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 23:54:17,921 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 23:54:17,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-16 23:54:17,989 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-12-16 23:54:17,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 23:54:17,992 WARN L261 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 114 conjunts are in the unsatisfiable core [2021-12-16 23:54:17,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 23:54:21,822 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:54:21,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 23:56:38,266 INFO L354 Elim1Store]: treesize reduction 158, result has 61.2 percent of original size [2021-12-16 23:56:38,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 150 treesize of output 283 [2021-12-16 23:57:18,722 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 4 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:57:18,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327679553] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 23:57:18,722 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 23:57:18,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 43, 48] total 121 [2021-12-16 23:57:18,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196445144] [2021-12-16 23:57:18,723 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 23:57:18,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 121 states [2021-12-16 23:57:18,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 23:57:18,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2021-12-16 23:57:18,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1129, Invalid=13346, Unknown=45, NotChecked=0, Total=14520 [2021-12-16 23:57:18,728 INFO L87 Difference]: Start difference. First operand 78 states and 86 transitions. Second operand has 121 states, 121 states have (on average 1.7355371900826446) internal successors, (210), 121 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:57:21,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:57:21,993 INFO L93 Difference]: Finished difference Result 150 states and 166 transitions. [2021-12-16 23:57:21,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-12-16 23:57:21,993 INFO L78 Accepts]: Start accepts. Automaton has has 121 states, 121 states have (on average 1.7355371900826446) internal successors, (210), 121 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-12-16 23:57:21,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:57:21,994 INFO L225 Difference]: With dead ends: 150 [2021-12-16 23:57:21,994 INFO L226 Difference]: Without dead ends: 146 [2021-12-16 23:57:21,998 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 65 SyntacticMatches, 39 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9490 ImplicationChecksByTransitivity, 142.9s TimeCoverageRelationStatistics Valid=1611, Invalid=18936, Unknown=45, NotChecked=0, Total=20592 [2021-12-16 23:57:21,998 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 103 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 905 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 1965 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 905 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 963 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-16 23:57:21,999 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 283 Invalid, 1965 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 905 Invalid, 0 Unknown, 963 Unchecked, 0.5s Time] [2021-12-16 23:57:22,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-12-16 23:57:22,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 131. [2021-12-16 23:57:22,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.123076923076923) internal successors, (146), 130 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) [2021-12-16 23:57:22,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 146 transitions. [2021-12-16 23:57:22,012 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 146 transitions. Word has length 77 [2021-12-16 23:57:22,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:57:22,012 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 146 transitions. [2021-12-16 23:57:22,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 121 states, 121 states have (on average 1.7355371900826446) internal successors, (210), 121 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:57:22,013 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 146 transitions. [2021-12-16 23:57:22,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-16 23:57:22,016 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:57:22,016 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 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] [2021-12-16 23:57:22,033 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-16 23:57:22,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:57:22,231 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:57:22,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:57:22,232 INFO L85 PathProgramCache]: Analyzing trace with hash -214262460, now seen corresponding path program 7 times [2021-12-16 23:57:22,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 23:57:22,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648187028] [2021-12-16 23:57:22,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:57:22,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 23:57:22,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:57:22,301 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-12-16 23:57:22,301 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 23:57:22,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648187028] [2021-12-16 23:57:22,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648187028] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 23:57:22,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998104338] [2021-12-16 23:57:22,301 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-16 23:57:22,301 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:57:22,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 23:57:22,302 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 23:57:22,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-16 23:57:22,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:57:22,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-16 23:57:22,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 23:57:22,531 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-12-16 23:57:22,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 23:57:22,654 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-12-16 23:57:22,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998104338] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 23:57:22,655 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 23:57:22,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2021-12-16 23:57:22,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911729118] [2021-12-16 23:57:22,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 23:57:22,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-16 23:57:22,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 23:57:22,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-16 23:57:22,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2021-12-16 23:57:22,656 INFO L87 Difference]: Start difference. First operand 131 states and 146 transitions. Second operand has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:57:22,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:57:22,905 INFO L93 Difference]: Finished difference Result 260 states and 290 transitions. [2021-12-16 23:57:22,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-16 23:57:22,906 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 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 79 [2021-12-16 23:57:22,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:57:22,906 INFO L225 Difference]: With dead ends: 260 [2021-12-16 23:57:22,906 INFO L226 Difference]: Without dead ends: 134 [2021-12-16 23:57:22,907 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=118, Invalid=344, Unknown=0, NotChecked=0, Total=462 [2021-12-16 23:57:22,907 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 123 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 369 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 23:57:22,908 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 99 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 369 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 23:57:22,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-12-16 23:57:22,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 133. [2021-12-16 23:57:22,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 1.121212121212121) internal successors, (148), 132 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:57:22,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 148 transitions. [2021-12-16 23:57:22,913 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 148 transitions. Word has length 79 [2021-12-16 23:57:22,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:57:22,913 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 148 transitions. [2021-12-16 23:57:22,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:57:22,913 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 148 transitions. [2021-12-16 23:57:22,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-16 23:57:22,914 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:57:22,914 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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] [2021-12-16 23:57:22,932 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-16 23:57:23,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:57:23,115 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:57:23,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:57:23,115 INFO L85 PathProgramCache]: Analyzing trace with hash 1053510502, now seen corresponding path program 8 times [2021-12-16 23:57:23,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 23:57:23,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801166413] [2021-12-16 23:57:23,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:57:23,115 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 23:57:23,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:57:23,194 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-12-16 23:57:23,194 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 23:57:23,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801166413] [2021-12-16 23:57:23,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801166413] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 23:57:23,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843496554] [2021-12-16 23:57:23,195 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 23:57:23,195 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:57:23,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 23:57:23,196 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 23:57:23,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-16 23:57:23,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 23:57:23,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 23:57:23,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-16 23:57:23,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 23:57:23,409 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-12-16 23:57:23,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 23:57:23,528 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-12-16 23:57:23,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843496554] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 23:57:23,529 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 23:57:23,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2021-12-16 23:57:23,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007569933] [2021-12-16 23:57:23,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 23:57:23,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-16 23:57:23,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 23:57:23,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-16 23:57:23,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-16 23:57:23,530 INFO L87 Difference]: Start difference. First operand 133 states and 148 transitions. Second operand has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:57:23,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:57:23,778 INFO L93 Difference]: Finished difference Result 209 states and 237 transitions. [2021-12-16 23:57:23,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-16 23:57:23,779 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 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 81 [2021-12-16 23:57:23,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:57:23,779 INFO L225 Difference]: With dead ends: 209 [2021-12-16 23:57:23,779 INFO L226 Difference]: Without dead ends: 104 [2021-12-16 23:57:23,780 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 154 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=152, Invalid=354, Unknown=0, NotChecked=0, Total=506 [2021-12-16 23:57:23,780 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 281 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 237 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 237 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 23:57:23,781 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [281 Valid, 40 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [237 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 23:57:23,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-12-16 23:57:23,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 96. [2021-12-16 23:57:23,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.0947368421052632) internal successors, (104), 95 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) [2021-12-16 23:57:23,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 104 transitions. [2021-12-16 23:57:23,785 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 104 transitions. Word has length 81 [2021-12-16 23:57:23,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:57:23,786 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 104 transitions. [2021-12-16 23:57:23,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:57:23,786 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 104 transitions. [2021-12-16 23:57:23,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-16 23:57:23,787 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:57:23,787 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 23:57:23,806 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-16 23:57:24,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-16 23:57:24,008 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:57:24,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:57:24,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1202071596, now seen corresponding path program 9 times [2021-12-16 23:57:24,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 23:57:24,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917399685] [2021-12-16 23:57:24,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:57:24,009 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 23:57:24,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:57:27,646 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 4 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:57:27,646 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 23:57:27,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917399685] [2021-12-16 23:57:27,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917399685] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 23:57:27,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897859674] [2021-12-16 23:57:27,647 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 23:57:27,647 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:57:27,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 23:57:27,649 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 23:57:27,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-16 23:57:27,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-12-16 23:57:27,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 23:57:27,717 WARN L261 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 150 conjunts are in the unsatisfiable core [2021-12-16 23:57:27,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 23:57:27,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-16 23:57:31,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 23:57:31,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 23:57:31,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 23:57:31,685 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 23:57:31,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 73 treesize of output 59 [2021-12-16 23:57:31,964 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 7 proven. 128 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-16 23:57:31,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 23:57:41,049 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-16 23:57:41,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897859674] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 23:57:41,050 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 23:57:41,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 26, 23] total 103 [2021-12-16 23:57:41,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180367118] [2021-12-16 23:57:41,050 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 23:57:41,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2021-12-16 23:57:41,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 23:57:41,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2021-12-16 23:57:41,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=574, Invalid=9932, Unknown=0, NotChecked=0, Total=10506 [2021-12-16 23:57:41,057 INFO L87 Difference]: Start difference. First operand 96 states and 104 transitions. Second operand has 103 states, 103 states have (on average 2.5728155339805827) internal successors, (265), 103 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:57:53,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:57:53,814 INFO L93 Difference]: Finished difference Result 186 states and 203 transitions. [2021-12-16 23:57:53,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-12-16 23:57:53,815 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 2.5728155339805827) internal successors, (265), 103 states have internal predecessors, (265), 0 states have call successors, (0), 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 95 [2021-12-16 23:57:53,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:57:53,816 INFO L225 Difference]: With dead ends: 186 [2021-12-16 23:57:53,816 INFO L226 Difference]: Without dead ends: 182 [2021-12-16 23:57:53,818 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 126 SyntacticMatches, 43 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10805 ImplicationChecksByTransitivity, 21.8s TimeCoverageRelationStatistics Valid=1812, Invalid=31129, Unknown=1, NotChecked=0, Total=32942 [2021-12-16 23:57:53,818 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 76 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 1942 mSolverCounterSat, 243 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 3336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 243 IncrementalHoareTripleChecker+Valid, 1942 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1151 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-16 23:57:53,818 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 242 Invalid, 3336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [243 Valid, 1942 Invalid, 0 Unknown, 1151 Unchecked, 1.2s Time] [2021-12-16 23:57:53,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-12-16 23:57:53,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 141. [2021-12-16 23:57:53,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.1) internal successors, (154), 140 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:57:53,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 154 transitions. [2021-12-16 23:57:53,826 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 154 transitions. Word has length 95 [2021-12-16 23:57:53,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:57:53,827 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 154 transitions. [2021-12-16 23:57:53,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 2.5728155339805827) internal successors, (265), 103 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:57:53,827 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 154 transitions. [2021-12-16 23:57:53,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-12-16 23:57:53,827 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:57:53,828 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 23:57:53,844 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-16 23:57:54,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:57:54,035 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:57:54,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:57:54,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1175667574, now seen corresponding path program 10 times [2021-12-16 23:57:54,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 23:57:54,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884298445] [2021-12-16 23:57:54,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:57:54,036 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 23:57:54,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:57:54,150 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-12-16 23:57:54,150 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 23:57:54,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884298445] [2021-12-16 23:57:54,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884298445] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 23:57:54,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954736520] [2021-12-16 23:57:54,151 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-16 23:57:54,151 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:57:54,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 23:57:54,153 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 23:57:54,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-16 23:57:54,228 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-16 23:57:54,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 23:57:54,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-16 23:57:54,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 23:57:54,444 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-12-16 23:57:54,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 23:57:54,587 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-12-16 23:57:54,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954736520] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 23:57:54,587 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 23:57:54,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2021-12-16 23:57:54,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627630015] [2021-12-16 23:57:54,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 23:57:54,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-16 23:57:54,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 23:57:54,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-16 23:57:54,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2021-12-16 23:57:54,588 INFO L87 Difference]: Start difference. First operand 141 states and 154 transitions. Second operand has 20 states, 20 states have (on average 3.55) internal successors, (71), 20 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:57:54,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:57:54,868 INFO L93 Difference]: Finished difference Result 345 states and 378 transitions. [2021-12-16 23:57:54,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-16 23:57:54,868 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.55) internal successors, (71), 20 states have internal predecessors, (71), 0 states have call successors, (0), 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 97 [2021-12-16 23:57:54,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:57:54,869 INFO L225 Difference]: With dead ends: 345 [2021-12-16 23:57:54,869 INFO L226 Difference]: Without dead ends: 144 [2021-12-16 23:57:54,869 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=489, Unknown=0, NotChecked=0, Total=650 [2021-12-16 23:57:54,870 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 120 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 23:57:54,870 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 86 Invalid, 567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 463 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 23:57:54,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-12-16 23:57:54,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 143. [2021-12-16 23:57:54,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 1.0985915492957747) internal successors, (156), 142 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:57:54,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 156 transitions. [2021-12-16 23:57:54,877 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 156 transitions. Word has length 97 [2021-12-16 23:57:54,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:57:54,877 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 156 transitions. [2021-12-16 23:57:54,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.55) internal successors, (71), 20 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:57:54,878 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 156 transitions. [2021-12-16 23:57:54,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-12-16 23:57:54,879 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:57:54,879 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 23:57:54,912 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-16 23:57:55,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-16 23:57:55,092 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:57:55,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:57:55,092 INFO L85 PathProgramCache]: Analyzing trace with hash -323654376, now seen corresponding path program 11 times [2021-12-16 23:57:55,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 23:57:55,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634141416] [2021-12-16 23:57:55,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:57:55,093 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 23:57:55,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:57:55,180 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-12-16 23:57:55,180 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 23:57:55,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634141416] [2021-12-16 23:57:55,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634141416] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 23:57:55,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677183145] [2021-12-16 23:57:55,181 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-16 23:57:55,181 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:57:55,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 23:57:55,196 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 23:57:55,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-16 23:57:55,389 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-12-16 23:57:55,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 23:57:55,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-16 23:57:55,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 23:57:55,593 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-12-16 23:57:55,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 23:57:55,751 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-12-16 23:57:55,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677183145] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 23:57:55,751 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 23:57:55,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 29 [2021-12-16 23:57:55,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900367958] [2021-12-16 23:57:55,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 23:57:55,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-16 23:57:55,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 23:57:55,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-16 23:57:55,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=685, Unknown=0, NotChecked=0, Total=812 [2021-12-16 23:57:55,753 INFO L87 Difference]: Start difference. First operand 143 states and 156 transitions. Second operand has 29 states, 29 states have (on average 3.6206896551724137) internal successors, (105), 29 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:57:56,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:57:56,076 INFO L93 Difference]: Finished difference Result 241 states and 268 transitions. [2021-12-16 23:57:56,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-16 23:57:56,076 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.6206896551724137) internal successors, (105), 29 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2021-12-16 23:57:56,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:57:56,076 INFO L225 Difference]: With dead ends: 241 [2021-12-16 23:57:56,077 INFO L226 Difference]: Without dead ends: 122 [2021-12-16 23:57:56,077 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=241, Invalid=1091, Unknown=0, NotChecked=0, Total=1332 [2021-12-16 23:57:56,078 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 328 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 293 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 755 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 293 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 23:57:56,078 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [328 Valid, 65 Invalid, 755 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [293 Valid, 462 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 23:57:56,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-12-16 23:57:56,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 114. [2021-12-16 23:57:56,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 1.079646017699115) internal successors, (122), 113 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:57:56,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 122 transitions. [2021-12-16 23:57:56,084 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 122 transitions. Word has length 99 [2021-12-16 23:57:56,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:57:56,084 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 122 transitions. [2021-12-16 23:57:56,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.6206896551724137) internal successors, (105), 29 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:57:56,085 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 122 transitions. [2021-12-16 23:57:56,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-16 23:57:56,087 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:57:56,087 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 23:57:56,104 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-12-16 23:57:56,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-16 23:57:56,304 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:57:56,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:57:56,304 INFO L85 PathProgramCache]: Analyzing trace with hash 1362635270, now seen corresponding path program 12 times [2021-12-16 23:57:56,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 23:57:56,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628556001] [2021-12-16 23:57:56,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:57:56,304 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 23:57:56,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:58:02,044 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 8 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:58:02,045 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 23:58:02,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628556001] [2021-12-16 23:58:02,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628556001] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 23:58:02,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896871122] [2021-12-16 23:58:02,045 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-16 23:58:02,045 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:58:02,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 23:58:02,046 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 23:58:02,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-16 23:58:02,138 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-12-16 23:58:02,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 23:58:02,141 WARN L261 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 188 conjunts are in the unsatisfiable core [2021-12-16 23:58:02,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 23:58:02,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-16 23:58:08,815 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 23:58:08,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 23 [2021-12-16 23:58:09,212 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 3 proven. 221 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 23:58:09,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 23:58:26,123 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 209 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-16 23:58:26,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896871122] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 23:58:26,123 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 23:58:26,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 33, 27] total 128 [2021-12-16 23:58:26,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116272904] [2021-12-16 23:58:26,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 23:58:26,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2021-12-16 23:58:26,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 23:58:26,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2021-12-16 23:58:26,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=599, Invalid=15657, Unknown=0, NotChecked=0, Total=16256 [2021-12-16 23:58:26,125 INFO L87 Difference]: Start difference. First operand 114 states and 122 transitions. Second operand has 128 states, 128 states have (on average 2.4609375) internal successors, (315), 128 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:58:42,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:58:42,881 INFO L93 Difference]: Finished difference Result 271 states and 293 transitions. [2021-12-16 23:58:42,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2021-12-16 23:58:42,882 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 128 states have (on average 2.4609375) internal successors, (315), 128 states have internal predecessors, (315), 0 states have call successors, (0), 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 113 [2021-12-16 23:58:42,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:58:42,882 INFO L225 Difference]: With dead ends: 271 [2021-12-16 23:58:42,883 INFO L226 Difference]: Without dead ends: 267 [2021-12-16 23:58:42,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 429 GetRequests, 139 SyntacticMatches, 58 SemanticMatches, 232 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17485 ImplicationChecksByTransitivity, 33.8s TimeCoverageRelationStatistics Valid=2238, Invalid=52284, Unknown=0, NotChecked=0, Total=54522 [2021-12-16 23:58:42,886 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 80 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 2652 mSolverCounterSat, 248 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 4476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 248 IncrementalHoareTripleChecker+Valid, 2652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1576 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-16 23:58:42,886 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 257 Invalid, 4476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [248 Valid, 2652 Invalid, 0 Unknown, 1576 Unchecked, 1.7s Time] [2021-12-16 23:58:42,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-12-16 23:58:42,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 217. [2021-12-16 23:58:42,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 1.087962962962963) internal successors, (235), 216 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:58:42,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 235 transitions. [2021-12-16 23:58:42,901 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 235 transitions. Word has length 113 [2021-12-16 23:58:42,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:58:42,901 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 235 transitions. [2021-12-16 23:58:42,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 128 states have (on average 2.4609375) internal successors, (315), 128 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:58:42,902 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 235 transitions. [2021-12-16 23:58:42,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-12-16 23:58:42,902 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:58:42,903 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 23:58:42,922 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-16 23:58:43,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-16 23:58:43,122 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:58:43,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:58:43,122 INFO L85 PathProgramCache]: Analyzing trace with hash -1548943064, now seen corresponding path program 13 times [2021-12-16 23:58:43,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 23:58:43,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533560280] [2021-12-16 23:58:43,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:58:43,123 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 23:58:43,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:58:43,253 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 27 proven. 34 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2021-12-16 23:58:43,254 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 23:58:43,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533560280] [2021-12-16 23:58:43,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533560280] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 23:58:43,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123835808] [2021-12-16 23:58:43,254 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-16 23:58:43,254 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:58:43,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 23:58:43,255 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 23:58:43,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-16 23:58:43,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:58:43,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-16 23:58:43,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 23:58:43,610 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2021-12-16 23:58:43,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 23:58:43,800 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2021-12-16 23:58:43,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123835808] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 23:58:43,800 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 23:58:43,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2021-12-16 23:58:43,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158108266] [2021-12-16 23:58:43,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 23:58:43,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-16 23:58:43,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 23:58:43,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-16 23:58:43,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=382, Unknown=0, NotChecked=0, Total=506 [2021-12-16 23:58:43,801 INFO L87 Difference]: Start difference. First operand 217 states and 235 transitions. Second operand has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 23 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:58:44,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:58:44,137 INFO L93 Difference]: Finished difference Result 433 states and 468 transitions. [2021-12-16 23:58:44,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-16 23:58:44,137 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 23 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-12-16 23:58:44,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:58:44,138 INFO L225 Difference]: With dead ends: 433 [2021-12-16 23:58:44,138 INFO L226 Difference]: Without dead ends: 194 [2021-12-16 23:58:44,139 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=211, Invalid=659, Unknown=0, NotChecked=0, Total=870 [2021-12-16 23:58:44,139 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 132 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 853 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 976 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 853 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 23:58:44,140 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 112 Invalid, 976 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 853 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-16 23:58:44,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-12-16 23:58:44,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 193. [2021-12-16 23:58:44,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 1.0833333333333333) internal successors, (208), 192 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:58:44,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 208 transitions. [2021-12-16 23:58:44,151 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 208 transitions. Word has length 115 [2021-12-16 23:58:44,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:58:44,151 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 208 transitions. [2021-12-16 23:58:44,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 23 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:58:44,152 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 208 transitions. [2021-12-16 23:58:44,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-12-16 23:58:44,152 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:58:44,152 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 23:58:44,172 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-16 23:58:44,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-16 23:58:44,362 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:58:44,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:58:44,363 INFO L85 PathProgramCache]: Analyzing trace with hash 357090890, now seen corresponding path program 14 times [2021-12-16 23:58:44,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 23:58:44,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814067437] [2021-12-16 23:58:44,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:58:44,363 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 23:58:44,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:58:44,512 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 16 proven. 45 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2021-12-16 23:58:44,513 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 23:58:44,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814067437] [2021-12-16 23:58:44,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814067437] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 23:58:44,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844644037] [2021-12-16 23:58:44,513 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 23:58:44,513 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:58:44,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 23:58:44,514 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 23:58:44,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-16 23:58:44,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 23:58:44,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 23:58:44,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-16 23:58:44,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 23:58:44,744 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2021-12-16 23:58:44,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 23:58:44,847 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2021-12-16 23:58:44,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844644037] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 23:58:44,847 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 23:58:44,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2021-12-16 23:58:44,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865584048] [2021-12-16 23:58:44,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 23:58:44,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-16 23:58:44,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 23:58:44,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-16 23:58:44,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2021-12-16 23:58:44,849 INFO L87 Difference]: Start difference. First operand 193 states and 208 transitions. Second operand has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 23 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:58:45,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:58:45,096 INFO L93 Difference]: Finished difference Result 293 states and 321 transitions. [2021-12-16 23:58:45,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-16 23:58:45,097 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 23 states have internal predecessors, (77), 0 states have call successors, (0), 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 117 [2021-12-16 23:58:45,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:58:45,098 INFO L225 Difference]: With dead ends: 293 [2021-12-16 23:58:45,098 INFO L226 Difference]: Without dead ends: 140 [2021-12-16 23:58:45,099 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 224 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=273, Invalid=657, Unknown=0, NotChecked=0, Total=930 [2021-12-16 23:58:45,108 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 415 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 344 mSolverCounterSat, 365 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 415 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 365 IncrementalHoareTripleChecker+Valid, 344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 23:58:45,108 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [415 Valid, 38 Invalid, 709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [365 Valid, 344 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 23:58:45,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-12-16 23:58:45,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 132. [2021-12-16 23:58:45,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 1.0687022900763359) internal successors, (140), 131 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:58:45,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 140 transitions. [2021-12-16 23:58:45,124 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 140 transitions. Word has length 117 [2021-12-16 23:58:45,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:58:45,124 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 140 transitions. [2021-12-16 23:58:45,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 23 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:58:45,125 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 140 transitions. [2021-12-16 23:58:45,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-12-16 23:58:45,125 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:58:45,125 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 23:58:45,143 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-16 23:58:45,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:58:45,337 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:58:45,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:58:45,337 INFO L85 PathProgramCache]: Analyzing trace with hash -1520659528, now seen corresponding path program 15 times [2021-12-16 23:58:45,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 23:58:45,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943889829] [2021-12-16 23:58:45,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:58:45,337 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 23:58:45,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:58:54,955 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 1 proven. 323 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:58:54,956 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 23:58:54,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943889829] [2021-12-16 23:58:54,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943889829] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 23:58:54,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291791319] [2021-12-16 23:58:54,956 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 23:58:54,956 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:58:54,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 23:58:54,957 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 23:58:54,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-16 23:58:55,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-12-16 23:58:55,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 23:58:55,084 WARN L261 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 222 conjunts are in the unsatisfiable core [2021-12-16 23:58:55,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 23:58:55,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-16 23:59:22,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 23:59:22,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 23:59:22,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 23:59:22,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 23:59:22,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-16 23:59:22,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 23:59:22,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 23:59:22,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 23:59:22,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 23:59:22,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 23:59:22,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 23:59:22,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 23:59:22,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 23:59:22,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 23:59:22,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 23:59:22,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-16 23:59:22,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 23:59:22,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 23:59:22,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 23:59:22,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 23:59:22,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 23:59:22,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-16 23:59:22,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 23:59:22,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 23:59:22,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-16 23:59:22,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 23:59:22,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-16 23:59:22,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 23:59:22,880 INFO L354 Elim1Store]: treesize reduction 448, result has 49.8 percent of original size [2021-12-16 23:59:22,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 19 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 245 treesize of output 484 [2021-12-17 00:01:00,653 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 7 proven. 308 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-17 00:01:00,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:01:30,998 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 299 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-17 00:01:30,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291791319] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:01:30,998 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 00:01:30,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 36, 31] total 144 [2021-12-17 00:01:30,999 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292831407] [2021-12-17 00:01:30,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 00:01:30,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 144 states [2021-12-17 00:01:30,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:01:30,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2021-12-17 00:01:31,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=908, Invalid=19684, Unknown=0, NotChecked=0, Total=20592 [2021-12-17 00:01:31,001 INFO L87 Difference]: Start difference. First operand 132 states and 140 transitions. Second operand has 144 states, 144 states have (on average 2.5208333333333335) internal successors, (363), 144 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:02:02,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:02:02,018 INFO L93 Difference]: Finished difference Result 237 states and 252 transitions. [2021-12-17 00:02:02,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-12-17 00:02:02,019 INFO L78 Accepts]: Start accepts. Automaton has has 144 states, 144 states have (on average 2.5208333333333335) internal successors, (363), 144 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 131 [2021-12-17 00:02:02,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:02:02,020 INFO L225 Difference]: With dead ends: 237 [2021-12-17 00:02:02,020 INFO L226 Difference]: Without dead ends: 233 [2021-12-17 00:02:02,022 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 467 GetRequests, 136 SyntacticMatches, 103 SemanticMatches, 228 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16198 ImplicationChecksByTransitivity, 80.4s TimeCoverageRelationStatistics Valid=2317, Invalid=50353, Unknown=0, NotChecked=0, Total=52670 [2021-12-17 00:02:02,023 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 53 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 2493 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 4886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 2493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2242 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-17 00:02:02,023 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 298 Invalid, 4886 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 2493 Invalid, 0 Unknown, 2242 Unchecked, 1.9s Time] [2021-12-17 00:02:02,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-12-17 00:02:02,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 221. [2021-12-17 00:02:02,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 1.0727272727272728) internal successors, (236), 220 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:02:02,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 236 transitions. [2021-12-17 00:02:02,039 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 236 transitions. Word has length 131 [2021-12-17 00:02:02,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:02:02,039 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 236 transitions. [2021-12-17 00:02:02,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 144 states, 144 states have (on average 2.5208333333333335) internal successors, (363), 144 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:02:02,039 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 236 transitions. [2021-12-17 00:02:02,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-12-17 00:02:02,040 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:02:02,040 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:02:02,057 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-17 00:02:02,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-17 00:02:02,254 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:02:02,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:02:02,254 INFO L85 PathProgramCache]: Analyzing trace with hash 458290778, now seen corresponding path program 16 times [2021-12-17 00:02:02,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:02:02,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633979303] [2021-12-17 00:02:02,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:02:02,254 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:02:02,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:02:02,388 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 38 proven. 47 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2021-12-17 00:02:02,388 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:02:02,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633979303] [2021-12-17 00:02:02,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633979303] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 00:02:02,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672965325] [2021-12-17 00:02:02,388 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 00:02:02,389 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:02:02,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:02:02,390 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 00:02:02,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-17 00:02:02,465 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 00:02:02,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:02:02,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-17 00:02:02,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:02:02,801 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2021-12-17 00:02:02,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:02:03,023 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2021-12-17 00:02:03,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672965325] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:02:03,023 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 00:02:03,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2021-12-17 00:02:03,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754388472] [2021-12-17 00:02:03,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 00:02:03,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-17 00:02:03,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:02:03,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-17 00:02:03,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=493, Unknown=0, NotChecked=0, Total=650 [2021-12-17 00:02:03,024 INFO L87 Difference]: Start difference. First operand 221 states and 236 transitions. Second operand has 26 states, 26 states have (on average 3.1923076923076925) internal successors, (83), 26 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:02:03,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:02:03,472 INFO L93 Difference]: Finished difference Result 440 states and 470 transitions. [2021-12-17 00:02:03,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-17 00:02:03,472 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.1923076923076925) internal successors, (83), 26 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 133 [2021-12-17 00:02:03,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:02:03,473 INFO L225 Difference]: With dead ends: 440 [2021-12-17 00:02:03,473 INFO L226 Difference]: Without dead ends: 224 [2021-12-17 00:02:03,474 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=268, Invalid=854, Unknown=0, NotChecked=0, Total=1122 [2021-12-17 00:02:03,474 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 165 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 814 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 973 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 814 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 00:02:03,475 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 107 Invalid, 973 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 814 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 00:02:03,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-12-17 00:02:03,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 223. [2021-12-17 00:02:03,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 1.072072072072072) internal successors, (238), 222 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:02:03,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 238 transitions. [2021-12-17 00:02:03,491 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 238 transitions. Word has length 133 [2021-12-17 00:02:03,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:02:03,491 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 238 transitions. [2021-12-17 00:02:03,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.1923076923076925) internal successors, (83), 26 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:02:03,491 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 238 transitions. [2021-12-17 00:02:03,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-17 00:02:03,492 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:02:03,492 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:02:03,510 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-12-17 00:02:03,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:02:03,705 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:02:03,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:02:03,705 INFO L85 PathProgramCache]: Analyzing trace with hash -368675076, now seen corresponding path program 17 times [2021-12-17 00:02:03,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:02:03,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830793708] [2021-12-17 00:02:03,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:02:03,706 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:02:03,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:02:03,841 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 25 proven. 60 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2021-12-17 00:02:03,841 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:02:03,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830793708] [2021-12-17 00:02:03,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830793708] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 00:02:03,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706908553] [2021-12-17 00:02:03,842 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 00:02:03,842 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:02:03,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:02:03,843 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 00:02:03,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-17 00:02:04,133 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-12-17 00:02:04,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:02:04,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-17 00:02:04,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:02:04,337 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2021-12-17 00:02:04,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:02:04,487 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2021-12-17 00:02:04,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706908553] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:02:04,488 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 00:02:04,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2021-12-17 00:02:04,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861298717] [2021-12-17 00:02:04,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 00:02:04,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-17 00:02:04,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:02:04,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-17 00:02:04,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=487, Unknown=0, NotChecked=0, Total=650 [2021-12-17 00:02:04,489 INFO L87 Difference]: Start difference. First operand 223 states and 238 transitions. Second operand has 26 states, 26 states have (on average 4.6923076923076925) internal successors, (122), 26 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:02:04,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:02:04,803 INFO L93 Difference]: Finished difference Result 335 states and 363 transitions. [2021-12-17 00:02:04,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-17 00:02:04,803 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.6923076923076925) internal successors, (122), 26 states have internal predecessors, (122), 0 states have call successors, (0), 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 135 [2021-12-17 00:02:04,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:02:04,804 INFO L225 Difference]: With dead ends: 335 [2021-12-17 00:02:04,804 INFO L226 Difference]: Without dead ends: 158 [2021-12-17 00:02:04,804 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 259 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=347, Invalid=843, Unknown=0, NotChecked=0, Total=1190 [2021-12-17 00:02:04,805 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 377 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 315 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 377 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 315 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 00:02:04,805 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [377 Valid, 37 Invalid, 705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [315 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 00:02:04,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-12-17 00:02:04,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 150. [2021-12-17 00:02:04,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 1.0604026845637584) internal successors, (158), 149 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:02:04,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 158 transitions. [2021-12-17 00:02:04,815 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 158 transitions. Word has length 135 [2021-12-17 00:02:04,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:02:04,815 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 158 transitions. [2021-12-17 00:02:04,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.6923076923076925) internal successors, (122), 26 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:02:04,815 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 158 transitions. [2021-12-17 00:02:04,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-12-17 00:02:04,816 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:02:04,816 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:02:04,837 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-12-17 00:02:05,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:02:05,041 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:02:05,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:02:05,041 INFO L85 PathProgramCache]: Analyzing trace with hash -1596967702, now seen corresponding path program 18 times [2021-12-17 00:02:05,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:02:05,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375030620] [2021-12-17 00:02:05,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:02:05,042 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:02:05,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:02:16,179 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 64 proven. 377 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 00:02:16,180 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:02:16,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375030620] [2021-12-17 00:02:16,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375030620] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 00:02:16,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141707150] [2021-12-17 00:02:16,180 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 00:02:16,180 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:02:16,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:02:16,181 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 00:02:16,182 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-17 00:02:16,323 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-12-17 00:02:16,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:02:16,327 WARN L261 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 250 conjunts are in the unsatisfiable core [2021-12-17 00:02:16,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:02:30,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:02:30,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:02:30,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:02:30,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:02:30,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:02:30,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:02:30,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:02:30,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:02:30,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:02:30,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:02:30,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:02:30,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:02:30,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:02:30,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:02:30,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:02:30,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:02:30,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:02:30,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:02:30,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:02:30,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:02:30,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:02:30,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:02:30,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:02:30,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:02:30,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:02:30,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:02:30,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:02:30,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:02:30,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:02:30,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:02:30,243 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 00:02:30,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 30 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 181 treesize of output 257 [2021-12-17 00:02:30,779 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 13 proven. 392 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-17 00:02:30,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:02:43,412 WARN L228 Executor]: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2021-12-17 00:02:43,415 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 101 [2021-12-17 00:02:43,427 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") [2021-12-17 00:02:43,428 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-17 00:02:43,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102] total 102 [2021-12-17 00:02:43,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735544708] [2021-12-17 00:02:43,428 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-17 00:02:43,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2021-12-17 00:02:43,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:02:43,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2021-12-17 00:02:43,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1376, Invalid=24384, Unknown=0, NotChecked=0, Total=25760 [2021-12-17 00:02:43,430 INFO L87 Difference]: Start difference. First operand 150 states and 158 transitions. Second operand has 102 states, 102 states have (on average 1.4607843137254901) internal successors, (149), 102 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:02:43,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-17 00:02:43,432 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 110 SyntacticMatches, 49 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14813 ImplicationChecksByTransitivity, 29.3s TimeCoverageRelationStatistics Valid=1376, Invalid=24384, Unknown=0, NotChecked=0, Total=25760 [2021-12-17 00:02:43,433 INFO L933 BasicCegarLoop]: 1 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, 1 SdHoareTripleChecker+Invalid, 1 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 [2021-12-17 00:02:43,433 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 00:02:43,467 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-12-17 00:02:43,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:02:43,652 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@296947b at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.assertCodeBlock(IncrementalHoareTripleChecker.java:360) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.prepareAssertionStackAndAddTransition(IncrementalHoareTripleChecker.java:206) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.checkInternal(IncrementalHoareTripleChecker.java:131) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker$ProtectedHtc.checkInternal(ChainingHoareTripleChecker.java:455) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker.checkInternal(ChainingHoareTripleChecker.java:103) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.checkInternal(CachingHoareTripleChecker.java:95) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton$InternalSuccessorComputationHelper.computeSuccWithSolver(AbstractInterpolantAutomaton.java:357) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.addOtherSuccessors(DeterministicInterpolantAutomaton.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:78) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:868) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:784) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:462) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:420) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-12-17 00:02:43,654 INFO L158 Benchmark]: Toolchain (without parser) took 525241.92ms. Allocated memory was 138.4MB in the beginning and 545.3MB in the end (delta: 406.8MB). Free memory was 106.9MB in the beginning and 192.2MB in the end (delta: -85.3MB). Peak memory consumption was 322.3MB. Max. memory is 16.1GB. [2021-12-17 00:02:43,654 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 83.9MB. Free memory was 41.4MB in the beginning and 41.3MB in the end (delta: 70.0kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-17 00:02:43,654 INFO L158 Benchmark]: CACSL2BoogieTranslator took 240.31ms. Allocated memory is still 138.4MB. Free memory was 106.6MB in the beginning and 112.5MB in the end (delta: -6.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-17 00:02:43,655 INFO L158 Benchmark]: Boogie Procedure Inliner took 40.26ms. Allocated memory is still 138.4MB. Free memory was 112.5MB in the beginning and 111.0MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-17 00:02:43,655 INFO L158 Benchmark]: Boogie Preprocessor took 31.62ms. Allocated memory is still 138.4MB. Free memory was 111.0MB in the beginning and 109.4MB in the end (delta: 1.6MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-12-17 00:02:43,655 INFO L158 Benchmark]: RCFGBuilder took 228.98ms. Allocated memory is still 138.4MB. Free memory was 109.4MB in the beginning and 97.6MB in the end (delta: 11.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-12-17 00:02:43,655 INFO L158 Benchmark]: TraceAbstraction took 524695.27ms. Allocated memory was 138.4MB in the beginning and 545.3MB in the end (delta: 406.8MB). Free memory was 97.2MB in the beginning and 192.2MB in the end (delta: -95.0MB). Peak memory consumption was 314.6MB. Max. memory is 16.1GB. [2021-12-17 00:02:43,656 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 83.9MB. Free memory was 41.4MB in the beginning and 41.3MB in the end (delta: 70.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 240.31ms. Allocated memory is still 138.4MB. Free memory was 106.6MB in the beginning and 112.5MB in the end (delta: -6.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 40.26ms. Allocated memory is still 138.4MB. Free memory was 112.5MB in the beginning and 111.0MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 31.62ms. Allocated memory is still 138.4MB. Free memory was 111.0MB in the beginning and 109.4MB in the end (delta: 1.6MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 228.98ms. Allocated memory is still 138.4MB. Free memory was 109.4MB in the beginning and 97.6MB in the end (delta: 11.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 524695.27ms. Allocated memory was 138.4MB in the beginning and 545.3MB in the end (delta: 406.8MB). Free memory was 97.2MB in the beginning and 192.2MB in the end (delta: -95.0MB). Peak memory consumption was 314.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@296947b de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@296947b: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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_sum4.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.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 ca2dcd06e0389cf665904adfee9ccd6a1a268c87541d3b3b3e0bcffb3a75664e --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 00:02:45,677 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 00:02:45,680 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 00:02:45,717 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 00:02:45,718 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 00:02:45,722 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 00:02:45,723 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 00:02:45,728 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 00:02:45,730 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 00:02:45,732 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 00:02:45,733 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 00:02:45,737 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 00:02:45,737 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 00:02:45,742 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 00:02:45,744 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 00:02:45,747 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 00:02:45,748 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 00:02:45,749 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 00:02:45,752 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 00:02:45,757 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 00:02:45,759 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 00:02:45,760 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 00:02:45,762 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 00:02:45,763 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 00:02:45,769 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 00:02:45,769 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 00:02:45,769 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 00:02:45,771 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 00:02:45,771 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 00:02:45,772 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 00:02:45,772 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 00:02:45,773 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 00:02:45,774 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 00:02:45,775 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 00:02:45,776 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 00:02:45,776 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 00:02:45,777 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 00:02:45,777 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 00:02:45,777 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 00:02:45,778 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 00:02:45,779 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 00:02:45,780 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-12-17 00:02:45,827 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 00:02:45,828 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 00:02:45,829 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 00:02:45,829 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 00:02:45,830 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 00:02:45,830 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 00:02:45,831 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 00:02:45,831 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 00:02:45,832 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 00:02:45,832 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 00:02:45,833 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 00:02:45,833 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 00:02:45,833 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 00:02:45,833 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 00:02:45,833 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 00:02:45,834 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 00:02:45,834 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-17 00:02:45,834 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-17 00:02:45,834 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-17 00:02:45,834 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 00:02:45,835 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 00:02:45,835 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 00:02:45,835 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 00:02:45,835 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 00:02:45,835 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 00:02:45,835 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 00:02:45,836 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 00:02:45,836 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 00:02:45,836 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 00:02:45,836 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 00:02:45,836 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-17 00:02:45,837 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-17 00:02:45,837 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 00:02:45,837 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 00:02:45,837 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 00:02:45,838 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 00:02:45,838 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-17 00:02:45,838 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ca2dcd06e0389cf665904adfee9ccd6a1a268c87541d3b3b3e0bcffb3a75664e [2021-12-17 00:02:46,131 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 00:02:46,148 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 00:02:46,150 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 00:02:46,152 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 00:02:46,152 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 00:02:46,153 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-crafted/zero_sum4.c [2021-12-17 00:02:46,207 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad1bd7bf7/60fb367872d54db484eccf510c93aec9/FLAGde07c2bf8 [2021-12-17 00:02:46,625 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 00:02:46,628 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum4.c [2021-12-17 00:02:46,637 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad1bd7bf7/60fb367872d54db484eccf510c93aec9/FLAGde07c2bf8 [2021-12-17 00:02:46,654 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad1bd7bf7/60fb367872d54db484eccf510c93aec9 [2021-12-17 00:02:46,656 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 00:02:46,658 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 00:02:46,661 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 00:02:46,662 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 00:02:46,666 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 00:02:46,667 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 12:02:46" (1/1) ... [2021-12-17 00:02:46,669 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33d17797 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:02:46, skipping insertion in model container [2021-12-17 00:02:46,669 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 12:02:46" (1/1) ... [2021-12-17 00:02:46,675 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 00:02:46,690 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 00:02:46,835 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_sum4.c[400,413] [2021-12-17 00:02:46,874 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 00:02:46,902 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 00:02:46,933 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_sum4.c[400,413] [2021-12-17 00:02:46,962 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 00:02:46,976 INFO L208 MainTranslator]: Completed translation [2021-12-17 00:02:46,977 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:02:46 WrapperNode [2021-12-17 00:02:46,977 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 00:02:46,978 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 00:02:46,978 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 00:02:46,978 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 00:02:46,984 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:02:46" (1/1) ... [2021-12-17 00:02:46,997 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:02:46" (1/1) ... [2021-12-17 00:02:47,024 INFO L137 Inliner]: procedures = 17, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 125 [2021-12-17 00:02:47,025 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 00:02:47,026 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 00:02:47,026 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 00:02:47,026 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 00:02:47,033 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:02:46" (1/1) ... [2021-12-17 00:02:47,034 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:02:46" (1/1) ... [2021-12-17 00:02:47,041 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:02:46" (1/1) ... [2021-12-17 00:02:47,042 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:02:46" (1/1) ... [2021-12-17 00:02:47,059 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:02:46" (1/1) ... [2021-12-17 00:02:47,064 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:02:46" (1/1) ... [2021-12-17 00:02:47,065 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:02:46" (1/1) ... [2021-12-17 00:02:47,067 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 00:02:47,070 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 00:02:47,071 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 00:02:47,072 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 00:02:47,073 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:02:46" (1/1) ... [2021-12-17 00:02:47,079 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 00:02:47,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:02:47,130 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) [2021-12-17 00:02:47,150 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 [2021-12-17 00:02:47,169 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 00:02:47,169 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-17 00:02:47,169 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-17 00:02:47,170 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2021-12-17 00:02:47,170 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 00:02:47,170 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 00:02:47,170 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2021-12-17 00:02:47,170 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-17 00:02:47,265 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 00:02:47,266 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 00:02:47,495 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 00:02:47,501 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 00:02:47,501 INFO L301 CfgBuilder]: Removed 9 assume(true) statements. [2021-12-17 00:02:47,503 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 12:02:47 BoogieIcfgContainer [2021-12-17 00:02:47,503 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 00:02:47,522 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 00:02:47,522 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 00:02:47,525 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 00:02:47,525 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 12:02:46" (1/3) ... [2021-12-17 00:02:47,526 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b751115 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 12:02:47, skipping insertion in model container [2021-12-17 00:02:47,527 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:02:46" (2/3) ... [2021-12-17 00:02:47,527 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b751115 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 12:02:47, skipping insertion in model container [2021-12-17 00:02:47,527 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 12:02:47" (3/3) ... [2021-12-17 00:02:47,528 INFO L111 eAbstractionObserver]: Analyzing ICFG zero_sum4.c [2021-12-17 00:02:47,532 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 00:02:47,533 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 00:02:47,581 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 00:02:47,590 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 [2021-12-17 00:02:47,590 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 00:02:47,606 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 36 states have (on average 1.5833333333333333) internal successors, (57), 37 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:02:47,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-17 00:02:47,610 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:02:47,611 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] [2021-12-17 00:02:47,615 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:02:47,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:02:47,620 INFO L85 PathProgramCache]: Analyzing trace with hash -2094998668, now seen corresponding path program 1 times [2021-12-17 00:02:47,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:02:47,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [209976455] [2021-12-17 00:02:47,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:02:47,631 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:02:47,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:02:47,652 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 00:02:47,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-17 00:02:47,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:02:47,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 1 conjunts are in the unsatisfiable core [2021-12-17 00:02:47,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:02:47,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 00:02:47,855 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 00:02:47,856 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 00:02:47,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [209976455] [2021-12-17 00:02:47,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [209976455] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 00:02:47,857 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 00:02:47,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 00:02:47,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532475778] [2021-12-17 00:02:47,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 00:02:47,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-17 00:02:47,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 00:02:47,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-17 00:02:47,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 00:02:47,894 INFO L87 Difference]: Start difference. First operand has 38 states, 36 states have (on average 1.5833333333333333) internal successors, (57), 37 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 11.5) internal successors, (23), 2 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:02:47,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:02:47,913 INFO L93 Difference]: Finished difference Result 71 states and 106 transitions. [2021-12-17 00:02:47,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-17 00:02:47,915 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 11.5) internal successors, (23), 2 states have internal predecessors, (23), 0 states have call successors, (0), 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 23 [2021-12-17 00:02:47,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:02:47,931 INFO L225 Difference]: With dead ends: 71 [2021-12-17 00:02:47,931 INFO L226 Difference]: Without dead ends: 33 [2021-12-17 00:02:47,934 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 00:02:47,937 INFO L933 BasicCegarLoop]: 47 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, 47 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 [2021-12-17 00:02:47,938 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 00:02:47,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-12-17 00:02:47,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-12-17 00:02:47,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.28125) internal successors, (41), 32 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:02:47,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 41 transitions. [2021-12-17 00:02:47,972 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 41 transitions. Word has length 23 [2021-12-17 00:02:47,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:02:47,972 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 41 transitions. [2021-12-17 00:02:47,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 11.5) internal successors, (23), 2 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:02:47,973 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 41 transitions. [2021-12-17 00:02:47,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-17 00:02:47,974 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:02:47,974 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] [2021-12-17 00:02:47,995 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-12-17 00:02:48,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 00:02:48,198 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:02:48,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:02:48,199 INFO L85 PathProgramCache]: Analyzing trace with hash -1680934388, now seen corresponding path program 1 times [2021-12-17 00:02:48,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:02:48,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1908216941] [2021-12-17 00:02:48,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:02:48,200 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:02:48,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:02:48,203 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 00:02:48,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-17 00:02:48,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:02:48,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-17 00:02:48,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:02:48,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 00:02:48,333 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 00:02:48,333 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 00:02:48,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1908216941] [2021-12-17 00:02:48,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1908216941] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 00:02:48,334 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 00:02:48,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 00:02:48,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775131258] [2021-12-17 00:02:48,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 00:02:48,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 00:02:48,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 00:02:48,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 00:02:48,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 00:02:48,342 INFO L87 Difference]: Start difference. First operand 33 states and 41 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:02:48,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:02:48,407 INFO L93 Difference]: Finished difference Result 52 states and 67 transitions. [2021-12-17 00:02:48,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 00:02:48,407 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 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 23 [2021-12-17 00:02:48,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:02:48,408 INFO L225 Difference]: With dead ends: 52 [2021-12-17 00:02:48,408 INFO L226 Difference]: Without dead ends: 48 [2021-12-17 00:02:48,409 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 00:02:48,410 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 3 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 00:02:48,410 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 89 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 00:02:48,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-12-17 00:02:48,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-12-17 00:02:48,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.3404255319148937) internal successors, (63), 47 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:02:48,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 63 transitions. [2021-12-17 00:02:48,417 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 63 transitions. Word has length 23 [2021-12-17 00:02:48,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:02:48,417 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 63 transitions. [2021-12-17 00:02:48,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:02:48,418 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 63 transitions. [2021-12-17 00:02:48,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-17 00:02:48,419 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:02:48,419 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] [2021-12-17 00:02:48,443 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-12-17 00:02:48,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 00:02:48,629 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:02:48,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:02:48,630 INFO L85 PathProgramCache]: Analyzing trace with hash -807143506, now seen corresponding path program 1 times [2021-12-17 00:02:48,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:02:48,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2140391176] [2021-12-17 00:02:48,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:02:48,631 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:02:48,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:02:48,633 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 00:02:48,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-17 00:02:48,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:02:48,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 00:02:48,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:02:48,729 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 00:02:48,730 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 00:02:48,730 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 00:02:48,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2140391176] [2021-12-17 00:02:48,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2140391176] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 00:02:48,731 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 00:02:48,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 00:02:48,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870614530] [2021-12-17 00:02:48,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 00:02:48,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 00:02:48,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 00:02:48,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 00:02:48,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 00:02:48,733 INFO L87 Difference]: Start difference. First operand 48 states and 63 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:02:48,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:02:48,785 INFO L93 Difference]: Finished difference Result 93 states and 123 transitions. [2021-12-17 00:02:48,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 00:02:48,786 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 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 25 [2021-12-17 00:02:48,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:02:48,786 INFO L225 Difference]: With dead ends: 93 [2021-12-17 00:02:48,786 INFO L226 Difference]: Without dead ends: 50 [2021-12-17 00:02:48,787 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 00:02:48,788 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 1 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 00:02:48,788 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 58 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 00:02:48,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-12-17 00:02:48,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2021-12-17 00:02:48,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.3333333333333333) internal successors, (64), 48 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:02:48,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 64 transitions. [2021-12-17 00:02:48,794 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 64 transitions. Word has length 25 [2021-12-17 00:02:48,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:02:48,794 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 64 transitions. [2021-12-17 00:02:48,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:02:48,794 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 64 transitions. [2021-12-17 00:02:48,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-17 00:02:48,806 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:02:48,806 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] [2021-12-17 00:02:48,816 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-12-17 00:02:49,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 00:02:49,017 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:02:49,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:02:49,017 INFO L85 PathProgramCache]: Analyzing trace with hash 293663568, now seen corresponding path program 1 times [2021-12-17 00:02:49,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:02:49,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1181782653] [2021-12-17 00:02:49,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:02:49,018 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:02:49,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:02:49,026 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 00:02:49,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-17 00:02:49,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:02:49,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-17 00:02:49,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:02:49,129 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 00:02:49,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:02:49,195 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 00:02:49,195 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 00:02:49,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1181782653] [2021-12-17 00:02:49,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1181782653] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:02:49,196 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:02:49,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-12-17 00:02:49,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376299815] [2021-12-17 00:02:49,196 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:02:49,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 00:02:49,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 00:02:49,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 00:02:49,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-17 00:02:49,198 INFO L87 Difference]: Start difference. First operand 49 states and 64 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:02:49,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:02:49,306 INFO L93 Difference]: Finished difference Result 95 states and 125 transitions. [2021-12-17 00:02:49,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 00:02:49,307 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 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 [2021-12-17 00:02:49,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:02:49,308 INFO L225 Difference]: With dead ends: 95 [2021-12-17 00:02:49,308 INFO L226 Difference]: Without dead ends: 52 [2021-12-17 00:02:49,308 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-17 00:02:49,309 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 2 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 00:02:49,309 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 115 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 00:02:49,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-12-17 00:02:49,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2021-12-17 00:02:49,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.32) internal successors, (66), 50 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:02:49,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 66 transitions. [2021-12-17 00:02:49,314 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 66 transitions. Word has length 27 [2021-12-17 00:02:49,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:02:49,314 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 66 transitions. [2021-12-17 00:02:49,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:02:49,314 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 66 transitions. [2021-12-17 00:02:49,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-17 00:02:49,315 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:02:49,315 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] [2021-12-17 00:02:49,344 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-12-17 00:02:49,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 00:02:49,525 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:02:49,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:02:49,526 INFO L85 PathProgramCache]: Analyzing trace with hash 1607306866, now seen corresponding path program 2 times [2021-12-17 00:02:49,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:02:49,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1269136257] [2021-12-17 00:02:49,528 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 00:02:49,528 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:02:49,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:02:49,533 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 00:02:49,534 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-17 00:02:49,564 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-17 00:02:49,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:02:49,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 00:02:49,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:02:49,620 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-17 00:02:49,620 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 00:02:49,620 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 00:02:49,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1269136257] [2021-12-17 00:02:49,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1269136257] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 00:02:49,621 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 00:02:49,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 00:02:49,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545678840] [2021-12-17 00:02:49,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 00:02:49,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 00:02:49,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 00:02:49,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 00:02:49,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 00:02:49,622 INFO L87 Difference]: Start difference. First operand 51 states and 66 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 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) [2021-12-17 00:02:49,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:02:49,740 INFO L93 Difference]: Finished difference Result 90 states and 118 transitions. [2021-12-17 00:02:49,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 00:02:49,741 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 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 29 [2021-12-17 00:02:49,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:02:49,741 INFO L225 Difference]: With dead ends: 90 [2021-12-17 00:02:49,742 INFO L226 Difference]: Without dead ends: 52 [2021-12-17 00:02:49,742 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 00:02:49,744 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 36 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 00:02:49,744 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 19 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 00:02:49,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-12-17 00:02:49,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 44. [2021-12-17 00:02:49,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.2093023255813953) internal successors, (52), 43 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:02:49,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2021-12-17 00:02:49,749 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 29 [2021-12-17 00:02:49,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:02:49,749 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2021-12-17 00:02:49,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 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) [2021-12-17 00:02:49,749 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2021-12-17 00:02:49,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-17 00:02:49,750 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:02:49,750 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] [2021-12-17 00:02:49,762 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-12-17 00:02:49,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 00:02:49,960 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:02:49,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:02:49,960 INFO L85 PathProgramCache]: Analyzing trace with hash 408266208, now seen corresponding path program 1 times [2021-12-17 00:02:49,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:02:49,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1159706841] [2021-12-17 00:02:49,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:02:49,961 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:02:49,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:02:49,964 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 00:02:49,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-17 00:02:50,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:02:50,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-17 00:02:50,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:02:50,216 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-17 00:02:50,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:02:50,421 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-17 00:02:50,422 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 00:02:50,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1159706841] [2021-12-17 00:02:50,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1159706841] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:02:50,422 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:02:50,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-12-17 00:02:50,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941745715] [2021-12-17 00:02:50,423 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:02:50,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-17 00:02:50,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 00:02:50,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-17 00:02:50,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-12-17 00:02:50,424 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:02:50,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:02:50,914 INFO L93 Difference]: Finished difference Result 155 states and 193 transitions. [2021-12-17 00:02:50,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-17 00:02:50,915 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-12-17 00:02:50,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:02:50,916 INFO L225 Difference]: With dead ends: 155 [2021-12-17 00:02:50,916 INFO L226 Difference]: Without dead ends: 123 [2021-12-17 00:02:50,916 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2021-12-17 00:02:50,917 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 288 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 00:02:50,917 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [288 Valid, 64 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-17 00:02:50,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-12-17 00:02:50,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 60. [2021-12-17 00:02:50,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.152542372881356) internal successors, (68), 59 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:02:50,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 68 transitions. [2021-12-17 00:02:50,925 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 68 transitions. Word has length 43 [2021-12-17 00:02:50,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:02:50,925 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 68 transitions. [2021-12-17 00:02:50,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:02:50,925 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 68 transitions. [2021-12-17 00:02:50,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-17 00:02:50,926 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:02:50,927 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-17 00:02:50,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-12-17 00:02:51,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 00:02:51,138 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:02:51,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:02:51,138 INFO L85 PathProgramCache]: Analyzing trace with hash -1004340752, now seen corresponding path program 2 times [2021-12-17 00:02:51,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:02:51,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1279475714] [2021-12-17 00:02:51,139 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 00:02:51,139 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:02:51,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:02:51,140 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 00:02:51,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-12-17 00:02:51,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 00:02:51,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:02:51,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-17 00:02:51,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:02:52,593 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-12-17 00:02:52,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 21 [2021-12-17 00:02:52,634 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 00:02:52,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:02:53,983 INFO L354 Elim1Store]: treesize reduction 39, result has 52.4 percent of original size [2021-12-17 00:02:53,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 63 [2021-12-17 00:02:59,924 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-17 00:02:59,924 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 00:02:59,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1279475714] [2021-12-17 00:02:59,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1279475714] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:02:59,925 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:02:59,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-12-17 00:02:59,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577834034] [2021-12-17 00:02:59,925 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:02:59,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-17 00:02:59,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 00:02:59,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-17 00:02:59,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=328, Unknown=1, NotChecked=0, Total=380 [2021-12-17 00:02:59,926 INFO L87 Difference]: Start difference. First operand 60 states and 68 transitions. Second operand has 20 states, 20 states have (on average 4.7) internal successors, (94), 20 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:03:02,101 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 00:03:04,279 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 00:03:06,420 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 00:03:08,603 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 00:03:10,732 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 00:03:12,918 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 00:03:15,046 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 00:03:17,214 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 00:03:17,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:03:17,382 INFO L93 Difference]: Finished difference Result 108 states and 123 transitions. [2021-12-17 00:03:17,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-17 00:03:17,383 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.7) internal successors, (94), 20 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-12-17 00:03:17,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:03:17,384 INFO L225 Difference]: With dead ends: 108 [2021-12-17 00:03:17,384 INFO L226 Difference]: Without dead ends: 104 [2021-12-17 00:03:17,384 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 85 SyntacticMatches, 13 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=56, Invalid=363, Unknown=1, NotChecked=0, Total=420 [2021-12-17 00:03:17,384 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 9 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 858 mSolverCounterSat, 1 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 931 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 858 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 17.4s IncrementalHoareTripleChecker+Time [2021-12-17 00:03:17,384 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 200 Invalid, 931 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 858 Invalid, 8 Unknown, 64 Unchecked, 17.4s Time] [2021-12-17 00:03:17,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-12-17 00:03:17,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 101. [2021-12-17 00:03:17,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.16) internal successors, (116), 100 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:03:17,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 116 transitions. [2021-12-17 00:03:17,398 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 116 transitions. Word has length 59 [2021-12-17 00:03:17,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:03:17,398 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 116 transitions. [2021-12-17 00:03:17,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.7) internal successors, (94), 20 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:03:17,399 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 116 transitions. [2021-12-17 00:03:17,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-17 00:03:17,399 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:03:17,399 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-12-17 00:03:17,414 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-12-17 00:03:17,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 00:03:17,615 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:03:17,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:03:17,616 INFO L85 PathProgramCache]: Analyzing trace with hash -1580077422, now seen corresponding path program 3 times [2021-12-17 00:03:17,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:03:17,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1217965602] [2021-12-17 00:03:17,617 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 00:03:17,617 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:03:17,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:03:17,619 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 00:03:17,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-12-17 00:03:17,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-17 00:03:17,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:03:17,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-17 00:03:17,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:03:18,000 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-17 00:03:18,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:03:18,170 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-17 00:03:18,171 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 00:03:18,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1217965602] [2021-12-17 00:03:18,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1217965602] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:03:18,171 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:03:18,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-12-17 00:03:18,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520227932] [2021-12-17 00:03:18,171 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:03:18,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-17 00:03:18,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 00:03:18,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-17 00:03:18,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-12-17 00:03:18,172 INFO L87 Difference]: Start difference. First operand 101 states and 116 transitions. Second operand has 17 states, 17 states have (on average 4.647058823529412) internal successors, (79), 17 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:03:18,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:03:18,718 INFO L93 Difference]: Finished difference Result 208 states and 241 transitions. [2021-12-17 00:03:18,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-17 00:03:18,719 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.647058823529412) internal successors, (79), 17 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-12-17 00:03:18,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:03:18,720 INFO L225 Difference]: With dead ends: 208 [2021-12-17 00:03:18,720 INFO L226 Difference]: Without dead ends: 124 [2021-12-17 00:03:18,720 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2021-12-17 00:03:18,721 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 176 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 596 mSolverCounterSat, 192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 00:03:18,721 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 64 Invalid, 788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 596 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 00:03:18,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-12-17 00:03:18,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 110. [2021-12-17 00:03:18,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 1.1376146788990826) internal successors, (124), 109 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:03:18,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 124 transitions. [2021-12-17 00:03:18,736 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 124 transitions. Word has length 61 [2021-12-17 00:03:18,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:03:18,736 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 124 transitions. [2021-12-17 00:03:18,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.647058823529412) internal successors, (79), 17 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:03:18,736 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 124 transitions. [2021-12-17 00:03:18,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-17 00:03:18,739 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:03:18,739 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-12-17 00:03:18,761 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-12-17 00:03:18,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 00:03:18,949 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:03:18,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:03:18,950 INFO L85 PathProgramCache]: Analyzing trace with hash -1181276846, now seen corresponding path program 4 times [2021-12-17 00:03:18,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:03:18,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1852680218] [2021-12-17 00:03:18,951 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 00:03:18,951 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:03:18,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:03:18,952 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 00:03:18,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-12-17 00:03:19,048 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 00:03:19,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:03:19,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-17 00:03:19,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:03:19,213 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-17 00:03:19,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:03:19,425 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-17 00:03:19,426 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 00:03:19,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1852680218] [2021-12-17 00:03:19,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1852680218] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:03:19,426 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:03:19,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-12-17 00:03:19,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755358209] [2021-12-17 00:03:19,426 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:03:19,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-17 00:03:19,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 00:03:19,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-17 00:03:19,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-12-17 00:03:19,427 INFO L87 Difference]: Start difference. First operand 110 states and 124 transitions. Second operand has 16 states, 16 states have (on average 3.6875) internal successors, (59), 16 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:03:19,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:03:19,700 INFO L93 Difference]: Finished difference Result 215 states and 243 transitions. [2021-12-17 00:03:19,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-17 00:03:19,701 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 16 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-12-17 00:03:19,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:03:19,702 INFO L225 Difference]: With dead ends: 215 [2021-12-17 00:03:19,702 INFO L226 Difference]: Without dead ends: 113 [2021-12-17 00:03:19,703 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2021-12-17 00:03:19,703 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 19 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 00:03:19,703 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 123 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 00:03:19,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-12-17 00:03:19,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 112. [2021-12-17 00:03:19,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 1.135135135135135) internal successors, (126), 111 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:03:19,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 126 transitions. [2021-12-17 00:03:19,715 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 126 transitions. Word has length 61 [2021-12-17 00:03:19,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:03:19,716 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 126 transitions. [2021-12-17 00:03:19,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 16 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:03:19,716 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 126 transitions. [2021-12-17 00:03:19,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-17 00:03:19,717 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:03:19,717 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2021-12-17 00:03:19,728 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2021-12-17 00:03:19,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 00:03:19,918 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:03:19,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:03:19,919 INFO L85 PathProgramCache]: Analyzing trace with hash 1506179060, now seen corresponding path program 5 times [2021-12-17 00:03:19,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:03:19,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1142634945] [2021-12-17 00:03:19,919 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 00:03:19,919 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:03:19,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:03:19,930 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 00:03:19,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-12-17 00:03:20,295 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-12-17 00:03:20,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:03:20,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-17 00:03:20,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:03:20,514 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-12-17 00:03:20,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:03:20,807 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-12-17 00:03:20,808 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 00:03:20,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1142634945] [2021-12-17 00:03:20,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1142634945] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:03:20,808 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:03:20,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-12-17 00:03:20,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249917227] [2021-12-17 00:03:20,808 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:03:20,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-17 00:03:20,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 00:03:20,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-17 00:03:20,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-17 00:03:20,809 INFO L87 Difference]: Start difference. First operand 112 states and 126 transitions. Second operand has 16 states, 16 states have (on average 3.6875) internal successors, (59), 16 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:03:21,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:03:21,171 INFO L93 Difference]: Finished difference Result 127 states and 141 transitions. [2021-12-17 00:03:21,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-17 00:03:21,171 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 16 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-12-17 00:03:21,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:03:21,172 INFO L225 Difference]: With dead ends: 127 [2021-12-17 00:03:21,173 INFO L226 Difference]: Without dead ends: 87 [2021-12-17 00:03:21,174 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2021-12-17 00:03:21,175 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 225 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 443 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 00:03:21,176 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 56 Invalid, 624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 443 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 00:03:21,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-12-17 00:03:21,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 78. [2021-12-17 00:03:21,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.1168831168831168) internal successors, (86), 77 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:03:21,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 86 transitions. [2021-12-17 00:03:21,204 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 86 transitions. Word has length 63 [2021-12-17 00:03:21,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:03:21,204 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 86 transitions. [2021-12-17 00:03:21,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 16 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:03:21,205 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 86 transitions. [2021-12-17 00:03:21,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-17 00:03:21,208 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:03:21,208 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-17 00:03:21,222 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-12-17 00:03:21,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 00:03:21,422 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:03:21,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:03:21,423 INFO L85 PathProgramCache]: Analyzing trace with hash 1152417058, now seen corresponding path program 6 times [2021-12-17 00:03:21,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:03:21,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [175835583] [2021-12-17 00:03:21,424 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 00:03:21,424 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:03:21,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:03:21,440 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 00:03:21,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-12-17 00:04:23,099 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-12-17 00:04:23,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:04:23,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 55 conjunts are in the unsatisfiable core [2021-12-17 00:04:23,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:04:24,433 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-12-17 00:04:24,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 62 treesize of output 30 [2021-12-17 00:04:24,491 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 00:04:24,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:04:34,007 INFO L354 Elim1Store]: treesize reduction 114, result has 46.0 percent of original size [2021-12-17 00:04:34,008 INFO L388 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 70 treesize of output 125 [2021-12-17 00:04:52,930 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-17 00:04:52,931 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 00:04:52,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [175835583] [2021-12-17 00:04:52,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [175835583] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:04:52,931 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:04:52,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 29 [2021-12-17 00:04:52,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111337211] [2021-12-17 00:04:52,931 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:04:52,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-17 00:04:52,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 00:04:52,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-17 00:04:52,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=737, Unknown=3, NotChecked=0, Total=812 [2021-12-17 00:04:52,932 INFO L87 Difference]: Start difference. First operand 78 states and 86 transitions. Second operand has 29 states, 29 states have (on average 4.413793103448276) internal successors, (128), 29 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:04:55,296 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 00:05:00,034 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 00:05:04,877 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 00:05:07,228 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 00:05:09,664 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 00:05:12,015 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 00:05:14,336 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 00:05:16,801 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 00:05:17,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:05:17,208 INFO L93 Difference]: Finished difference Result 140 states and 155 transitions. [2021-12-17 00:05:17,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-17 00:05:17,208 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 4.413793103448276) internal successors, (128), 29 states have internal predecessors, (128), 0 states have call successors, (0), 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 77 [2021-12-17 00:05:17,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:05:17,209 INFO L225 Difference]: With dead ends: 140 [2021-12-17 00:05:17,209 INFO L226 Difference]: Without dead ends: 136 [2021-12-17 00:05:17,209 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 107 SyntacticMatches, 18 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 25.9s TimeCoverageRelationStatistics Valid=85, Invalid=904, Unknown=3, NotChecked=0, Total=992 [2021-12-17 00:05:17,210 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 9 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 1439 mSolverCounterSat, 1 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 1530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1439 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 19.3s IncrementalHoareTripleChecker+Time [2021-12-17 00:05:17,210 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 235 Invalid, 1530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1439 Invalid, 8 Unknown, 82 Unchecked, 19.3s Time] [2021-12-17 00:05:17,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-12-17 00:05:17,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 131. [2021-12-17 00:05:17,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.123076923076923) internal successors, (146), 130 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) [2021-12-17 00:05:17,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 146 transitions. [2021-12-17 00:05:17,219 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 146 transitions. Word has length 77 [2021-12-17 00:05:17,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:05:17,220 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 146 transitions. [2021-12-17 00:05:17,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.413793103448276) internal successors, (128), 29 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:05:17,220 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 146 transitions. [2021-12-17 00:05:17,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-17 00:05:17,220 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:05:17,221 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 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] [2021-12-17 00:05:17,263 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-12-17 00:05:17,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 00:05:17,432 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:05:17,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:05:17,432 INFO L85 PathProgramCache]: Analyzing trace with hash -214262460, now seen corresponding path program 7 times [2021-12-17 00:05:17,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:05:17,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1357488529] [2021-12-17 00:05:17,433 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-17 00:05:17,433 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:05:17,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:05:17,434 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 00:05:17,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-12-17 00:05:17,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:05:17,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-17 00:05:17,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:05:17,938 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-12-17 00:05:17,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:05:18,308 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-12-17 00:05:18,308 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 00:05:18,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1357488529] [2021-12-17 00:05:18,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1357488529] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:05:18,308 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:05:18,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-12-17 00:05:18,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897326819] [2021-12-17 00:05:18,309 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:05:18,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-17 00:05:18,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 00:05:18,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-17 00:05:18,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2021-12-17 00:05:18,310 INFO L87 Difference]: Start difference. First operand 131 states and 146 transitions. Second operand has 22 states, 22 states have (on average 3.9545454545454546) internal successors, (87), 22 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:05:19,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:05:19,037 INFO L93 Difference]: Finished difference Result 260 states and 290 transitions. [2021-12-17 00:05:19,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-17 00:05:19,039 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.9545454545454546) internal successors, (87), 22 states have internal predecessors, (87), 0 states have call successors, (0), 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 79 [2021-12-17 00:05:19,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:05:19,041 INFO L225 Difference]: With dead ends: 260 [2021-12-17 00:05:19,041 INFO L226 Difference]: Without dead ends: 134 [2021-12-17 00:05:19,043 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=202, Invalid=610, Unknown=0, NotChecked=0, Total=812 [2021-12-17 00:05:19,044 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 355 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 703 mSolverCounterSat, 215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 918 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 215 IncrementalHoareTripleChecker+Valid, 703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 00:05:19,044 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [355 Valid, 137 Invalid, 918 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [215 Valid, 703 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 00:05:19,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-12-17 00:05:19,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 133. [2021-12-17 00:05:19,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 1.121212121212121) internal successors, (148), 132 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:05:19,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 148 transitions. [2021-12-17 00:05:19,057 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 148 transitions. Word has length 79 [2021-12-17 00:05:19,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:05:19,057 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 148 transitions. [2021-12-17 00:05:19,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.9545454545454546) internal successors, (87), 22 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:05:19,057 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 148 transitions. [2021-12-17 00:05:19,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-17 00:05:19,058 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:05:19,058 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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] [2021-12-17 00:05:19,068 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-12-17 00:05:19,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 00:05:19,268 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:05:19,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:05:19,268 INFO L85 PathProgramCache]: Analyzing trace with hash 1053510502, now seen corresponding path program 8 times [2021-12-17 00:05:19,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:05:19,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1210595912] [2021-12-17 00:05:19,269 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 00:05:19,269 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:05:19,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:05:19,270 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 00:05:19,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-12-17 00:05:19,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 00:05:19,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:05:19,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-17 00:05:19,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:05:19,677 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-12-17 00:05:19,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:05:20,085 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-12-17 00:05:20,085 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 00:05:20,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1210595912] [2021-12-17 00:05:20,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1210595912] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:05:20,086 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:05:20,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-12-17 00:05:20,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623351290] [2021-12-17 00:05:20,086 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:05:20,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-17 00:05:20,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 00:05:20,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-17 00:05:20,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2021-12-17 00:05:20,087 INFO L87 Difference]: Start difference. First operand 133 states and 148 transitions. Second operand has 21 states, 21 states have (on average 3.1904761904761907) internal successors, (67), 21 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) [2021-12-17 00:05:20,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:05:20,724 INFO L93 Difference]: Finished difference Result 210 states and 238 transitions. [2021-12-17 00:05:20,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 00:05:20,725 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.1904761904761907) internal successors, (67), 21 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 81 [2021-12-17 00:05:20,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:05:20,726 INFO L225 Difference]: With dead ends: 210 [2021-12-17 00:05:20,726 INFO L226 Difference]: Without dead ends: 105 [2021-12-17 00:05:20,727 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=386, Unknown=0, NotChecked=0, Total=506 [2021-12-17 00:05:20,728 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 189 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 756 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 919 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 00:05:20,728 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 73 Invalid, 919 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 756 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 00:05:20,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-12-17 00:05:20,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 96. [2021-12-17 00:05:20,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.0947368421052632) internal successors, (104), 95 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) [2021-12-17 00:05:20,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 104 transitions. [2021-12-17 00:05:20,738 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 104 transitions. Word has length 81 [2021-12-17 00:05:20,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:05:20,739 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 104 transitions. [2021-12-17 00:05:20,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.1904761904761907) internal successors, (67), 21 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) [2021-12-17 00:05:20,739 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 104 transitions. [2021-12-17 00:05:20,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-17 00:05:20,740 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:05:20,740 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:05:20,750 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-12-17 00:05:20,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 00:05:20,950 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:05:20,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:05:20,950 INFO L85 PathProgramCache]: Analyzing trace with hash -1202071596, now seen corresponding path program 9 times [2021-12-17 00:05:20,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:05:20,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [105353078] [2021-12-17 00:05:20,962 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 00:05:20,962 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:05:20,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:05:20,963 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 00:05:20,964 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process Killed by 15