./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread/triangular-longest-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 20ed64ec 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/pthread/triangular-longest-2.i -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 faf61a04ec090f6b1743a12583eb9c9759e6ed3e ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-20ed64e [2021-08-26 14:13:42,640 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-26 14:13:42,643 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-26 14:13:42,681 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-26 14:13:42,681 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-26 14:13:42,682 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-26 14:13:42,683 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-26 14:13:42,698 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-26 14:13:42,699 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-26 14:13:42,700 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-26 14:13:42,701 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-26 14:13:42,702 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-26 14:13:42,702 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-26 14:13:42,703 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-26 14:13:42,704 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-26 14:13:42,704 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-26 14:13:42,705 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-26 14:13:42,706 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-26 14:13:42,707 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-26 14:13:42,722 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-26 14:13:42,723 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-26 14:13:42,724 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-26 14:13:42,725 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-26 14:13:42,725 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-26 14:13:42,727 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-26 14:13:42,727 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-26 14:13:42,728 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-26 14:13:42,728 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-26 14:13:42,729 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-26 14:13:42,729 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-26 14:13:42,729 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-26 14:13:42,730 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-26 14:13:42,730 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-26 14:13:42,731 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-26 14:13:42,732 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-26 14:13:42,732 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-26 14:13:42,733 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-26 14:13:42,733 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-26 14:13:42,733 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-26 14:13:42,749 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-26 14:13:42,750 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-26 14:13:42,751 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-26 14:13:42,766 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-26 14:13:42,784 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-26 14:13:42,785 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-26 14:13:42,785 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-26 14:13:42,786 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-26 14:13:42,786 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-26 14:13:42,786 INFO L138 SettingsManager]: * Use SBE=true [2021-08-26 14:13:42,787 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-26 14:13:42,787 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-26 14:13:42,787 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-26 14:13:42,787 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-26 14:13:42,787 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-26 14:13:42,787 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-26 14:13:42,788 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-26 14:13:42,788 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-26 14:13:42,788 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-26 14:13:42,788 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-26 14:13:42,788 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-26 14:13:42,794 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-26 14:13:42,795 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-26 14:13:42,795 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-26 14:13:42,795 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-26 14:13:42,795 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 14:13:42,795 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-26 14:13:42,796 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-26 14:13:42,796 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-26 14:13:42,796 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-26 14:13:42,796 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-26 14:13:42,796 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-26 14:13:42,796 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-26 14:13:42,797 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> faf61a04ec090f6b1743a12583eb9c9759e6ed3e [2021-08-26 14:13:43,212 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-26 14:13:43,235 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-26 14:13:43,245 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-26 14:13:43,246 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-26 14:13:43,247 INFO L275 PluginConnector]: CDTParser initialized [2021-08-26 14:13:43,248 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread/triangular-longest-2.i [2021-08-26 14:13:43,318 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2a408e4b1/744c26166ce247f39661de3b0a829283/FLAGb56d1bd01 [2021-08-26 14:13:43,897 INFO L306 CDTParser]: Found 1 translation units. [2021-08-26 14:13:43,917 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/triangular-longest-2.i [2021-08-26 14:13:43,932 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2a408e4b1/744c26166ce247f39661de3b0a829283/FLAGb56d1bd01 [2021-08-26 14:13:44,191 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2a408e4b1/744c26166ce247f39661de3b0a829283 [2021-08-26 14:13:44,194 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-26 14:13:44,200 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-26 14:13:44,201 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-26 14:13:44,202 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-26 14:13:44,219 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-26 14:13:44,220 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 02:13:44" (1/1) ... [2021-08-26 14:13:44,221 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54988fc5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:13:44, skipping insertion in model container [2021-08-26 14:13:44,221 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 02:13:44" (1/1) ... [2021-08-26 14:13:44,226 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-26 14:13:44,280 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-26 14:13:44,711 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/triangular-longest-2.i[30964,30977] [2021-08-26 14:13:44,714 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 14:13:44,719 INFO L203 MainTranslator]: Completed pre-run [2021-08-26 14:13:44,758 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/triangular-longest-2.i[30964,30977] [2021-08-26 14:13:44,760 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 14:13:44,793 INFO L208 MainTranslator]: Completed translation [2021-08-26 14:13:44,801 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:13:44 WrapperNode [2021-08-26 14:13:44,801 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-26 14:13:44,802 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-26 14:13:44,802 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-26 14:13:44,802 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-26 14:13:44,825 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:13:44" (1/1) ... [2021-08-26 14:13:44,850 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:13:44" (1/1) ... [2021-08-26 14:13:44,867 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-26 14:13:44,868 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-26 14:13:44,868 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-26 14:13:44,868 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-26 14:13:44,874 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:13:44" (1/1) ... [2021-08-26 14:13:44,874 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:13:44" (1/1) ... [2021-08-26 14:13:44,878 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:13:44" (1/1) ... [2021-08-26 14:13:44,878 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:13:44" (1/1) ... [2021-08-26 14:13:44,893 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:13:44" (1/1) ... [2021-08-26 14:13:44,896 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:13:44" (1/1) ... [2021-08-26 14:13:44,900 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:13:44" (1/1) ... [2021-08-26 14:13:44,902 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-26 14:13:44,905 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-26 14:13:44,906 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-26 14:13:44,906 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-26 14:13:44,907 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:13:44" (1/1) ... [2021-08-26 14:13:44,911 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 14:13:44,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 14:13:44,930 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) [2021-08-26 14:13:45,016 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 [2021-08-26 14:13:45,051 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-08-26 14:13:45,051 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-08-26 14:13:45,052 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-08-26 14:13:45,052 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-08-26 14:13:45,052 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-26 14:13:45,052 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-08-26 14:13:45,052 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-26 14:13:45,064 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-26 14:13:45,065 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-26 14:13:45,065 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-08-26 14:13:45,065 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-26 14:13:45,065 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-26 14:13:45,066 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-26 14:13:45,645 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-26 14:13:45,645 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-08-26 14:13:45,647 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 02:13:45 BoogieIcfgContainer [2021-08-26 14:13:45,647 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-26 14:13:45,649 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-26 14:13:45,649 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-26 14:13:45,651 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-26 14:13:45,651 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 02:13:44" (1/3) ... [2021-08-26 14:13:45,652 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@539df147 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 02:13:45, skipping insertion in model container [2021-08-26 14:13:45,652 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:13:44" (2/3) ... [2021-08-26 14:13:45,668 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@539df147 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 02:13:45, skipping insertion in model container [2021-08-26 14:13:45,669 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 02:13:45" (3/3) ... [2021-08-26 14:13:45,670 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-longest-2.i [2021-08-26 14:13:45,674 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-26 14:13:45,674 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-26 14:13:45,674 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-26 14:13:45,674 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-26 14:13:45,713 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:13:45,714 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:13:45,714 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:13:45,714 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:13:45,714 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:13:45,714 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:13:45,714 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:13:45,715 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:13:45,715 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:13:45,715 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:13:45,716 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:13:45,716 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:13:45,716 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:13:45,716 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:13:45,717 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:13:45,717 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:13:45,717 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:13:45,717 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:13:45,717 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:13:45,718 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:13:45,718 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:13:45,718 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:13:45,718 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:13:45,719 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:13:45,719 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:13:45,719 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:13:45,719 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:13:45,719 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:13:45,720 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:13:45,720 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:13:45,720 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:13:45,720 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:13:45,721 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:13:45,721 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:13:45,721 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:13:45,721 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:13:45,721 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:13:45,736 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:13:45,737 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:13:45,737 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:13:45,737 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:13:45,737 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:13:45,738 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:13:45,738 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:13:45,738 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:13:45,738 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:13:45,738 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:13:45,738 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:13:45,739 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:13:45,739 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:13:45,739 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:13:45,739 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:13:45,739 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:13:45,739 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:13:45,741 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:13:45,741 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:13:45,744 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:13:45,745 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:13:45,745 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:13:45,745 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:13:45,745 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:13:45,745 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:13:45,750 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:13:45,750 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:13:45,750 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:13:45,751 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:13:45,751 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:13:45,751 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:13:45,753 INFO L148 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-26 14:13:45,817 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-26 14:13:45,836 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, mConcurrency=FINITE_AUTOMATA, 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 [2021-08-26 14:13:45,837 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-08-26 14:13:45,855 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-08-26 14:13:45,879 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 68 places, 66 transitions, 142 flow [2021-08-26 14:13:45,881 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 68 places, 66 transitions, 142 flow [2021-08-26 14:13:45,883 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 68 places, 66 transitions, 142 flow [2021-08-26 14:13:45,937 INFO L129 PetriNetUnfolder]: 5/64 cut-off events. [2021-08-26 14:13:45,937 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-26 14:13:45,946 INFO L84 FinitePrefix]: Finished finitePrefix Result has 71 conditions, 64 events. 5/64 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 65 event pairs, 0 based on Foata normal form. 0/58 useless extension candidates. Maximal degree in co-relation 46. Up to 2 conditions per place. [2021-08-26 14:13:45,948 INFO L116 LiptonReduction]: Number of co-enabled transitions 1078 [2021-08-26 14:13:51,467 INFO L131 LiptonReduction]: Checked pairs total: 1010 [2021-08-26 14:13:51,467 INFO L133 LiptonReduction]: Total number of compositions: 58 [2021-08-26 14:13:51,473 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 40 flow [2021-08-26 14:13:51,480 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 35 states, 34 states have (on average 2.5294117647058822) internal successors, (86), 34 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) [2021-08-26 14:13:51,481 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 34 states have (on average 2.5294117647058822) internal successors, (86), 34 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) [2021-08-26 14:13:51,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-08-26 14:13:51,484 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 14:13:51,490 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-08-26 14:13:51,491 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-26 14:13:51,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 14:13:51,496 INFO L82 PathProgramCache]: Analyzing trace with hash -776411381, now seen corresponding path program 1 times [2021-08-26 14:13:51,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 14:13:51,517 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44341542] [2021-08-26 14:13:51,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 14:13:51,517 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 14:13:51,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 14:13:51,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 14:13:51,840 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 14:13:51,840 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44341542] [2021-08-26 14:13:51,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44341542] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 14:13:51,841 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 14:13:51,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-26 14:13:51,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766173332] [2021-08-26 14:13:51,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-26 14:13:51,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 14:13:51,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-26 14:13:51,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-26 14:13:51,873 INFO L87 Difference]: Start difference. First operand has 35 states, 34 states have (on average 2.5294117647058822) internal successors, (86), 34 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) Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:13:52,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 14:13:52,087 INFO L93 Difference]: Finished difference Result 44 states and 107 transitions. [2021-08-26 14:13:52,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-26 14:13:52,088 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2021-08-26 14:13:52,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 14:13:52,099 INFO L225 Difference]: With dead ends: 44 [2021-08-26 14:13:52,099 INFO L226 Difference]: Without dead ends: 38 [2021-08-26 14:13:52,113 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 170.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-26 14:13:52,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-08-26 14:13:52,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-08-26 14:13:52,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 37 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:13:52,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 92 transitions. [2021-08-26 14:13:52,149 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 92 transitions. Word has length 6 [2021-08-26 14:13:52,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 14:13:52,164 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 92 transitions. [2021-08-26 14:13:52,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:13:52,165 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 92 transitions. [2021-08-26 14:13:52,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-08-26 14:13:52,166 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 14:13:52,166 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 14:13:52,166 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-26 14:13:52,166 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-26 14:13:52,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 14:13:52,166 INFO L82 PathProgramCache]: Analyzing trace with hash 1192430633, now seen corresponding path program 1 times [2021-08-26 14:13:52,167 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 14:13:52,167 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629293213] [2021-08-26 14:13:52,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 14:13:52,167 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 14:13:52,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 14:13:52,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 14:13:52,310 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 14:13:52,311 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629293213] [2021-08-26 14:13:52,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629293213] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 14:13:52,311 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 14:13:52,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-26 14:13:52,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034944661] [2021-08-26 14:13:52,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-26 14:13:52,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 14:13:52,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-26 14:13:52,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-26 14:13:52,318 INFO L87 Difference]: Start difference. First operand 38 states and 92 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:13:52,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 14:13:52,386 INFO L93 Difference]: Finished difference Result 64 states and 150 transitions. [2021-08-26 14:13:52,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-26 14:13:52,387 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2021-08-26 14:13:52,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 14:13:52,388 INFO L225 Difference]: With dead ends: 64 [2021-08-26 14:13:52,388 INFO L226 Difference]: Without dead ends: 50 [2021-08-26 14:13:52,389 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 48.0ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-26 14:13:52,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-08-26 14:13:52,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2021-08-26 14:13:52,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 2.4390243902439024) internal successors, (100), 41 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:13:52,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 100 transitions. [2021-08-26 14:13:52,398 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 100 transitions. Word has length 8 [2021-08-26 14:13:52,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 14:13:52,399 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 100 transitions. [2021-08-26 14:13:52,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:13:52,399 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 100 transitions. [2021-08-26 14:13:52,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-26 14:13:52,400 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 14:13:52,400 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 14:13:52,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-26 14:13:52,400 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-26 14:13:52,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 14:13:52,401 INFO L82 PathProgramCache]: Analyzing trace with hash -830913789, now seen corresponding path program 1 times [2021-08-26 14:13:52,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 14:13:52,401 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076553790] [2021-08-26 14:13:52,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 14:13:52,402 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 14:13:52,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 14:13:52,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 14:13:52,520 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 14:13:52,521 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076553790] [2021-08-26 14:13:52,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076553790] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 14:13:52,521 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 14:13:52,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-26 14:13:52,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888713557] [2021-08-26 14:13:52,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-26 14:13:52,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 14:13:52,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-26 14:13:52,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-26 14:13:52,522 INFO L87 Difference]: Start difference. First operand 42 states and 100 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:13:52,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 14:13:52,680 INFO L93 Difference]: Finished difference Result 58 states and 136 transitions. [2021-08-26 14:13:52,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-26 14:13:52,680 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 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 10 [2021-08-26 14:13:52,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 14:13:52,681 INFO L225 Difference]: With dead ends: 58 [2021-08-26 14:13:52,681 INFO L226 Difference]: Without dead ends: 52 [2021-08-26 14:13:52,681 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 122.6ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-08-26 14:13:52,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-08-26 14:13:52,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 38. [2021-08-26 14:13:52,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 2.4324324324324325) internal successors, (90), 37 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:13:52,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 90 transitions. [2021-08-26 14:13:52,685 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 90 transitions. Word has length 10 [2021-08-26 14:13:52,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 14:13:52,685 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 90 transitions. [2021-08-26 14:13:52,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:13:52,685 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 90 transitions. [2021-08-26 14:13:52,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-26 14:13:52,686 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 14:13:52,686 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 14:13:52,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-26 14:13:52,686 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-26 14:13:52,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 14:13:52,686 INFO L82 PathProgramCache]: Analyzing trace with hash -855995889, now seen corresponding path program 2 times [2021-08-26 14:13:52,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 14:13:52,687 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51792123] [2021-08-26 14:13:52,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 14:13:52,687 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 14:13:52,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 14:13:52,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 14:13:52,732 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 14:13:52,732 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51792123] [2021-08-26 14:13:52,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51792123] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 14:13:52,733 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 14:13:52,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-26 14:13:52,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130351826] [2021-08-26 14:13:52,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-26 14:13:52,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 14:13:52,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-26 14:13:52,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-26 14:13:52,734 INFO L87 Difference]: Start difference. First operand 38 states and 90 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:13:52,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 14:13:52,795 INFO L93 Difference]: Finished difference Result 60 states and 142 transitions. [2021-08-26 14:13:52,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-26 14:13:52,796 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 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 10 [2021-08-26 14:13:52,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 14:13:52,796 INFO L225 Difference]: With dead ends: 60 [2021-08-26 14:13:52,796 INFO L226 Difference]: Without dead ends: 47 [2021-08-26 14:13:52,797 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 43.2ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-08-26 14:13:52,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-08-26 14:13:52,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 40. [2021-08-26 14:13:52,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 2.4871794871794872) internal successors, (97), 39 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:13:52,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2021-08-26 14:13:52,799 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 10 [2021-08-26 14:13:52,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 14:13:52,800 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2021-08-26 14:13:52,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:13:52,800 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2021-08-26 14:13:52,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-26 14:13:52,800 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 14:13:52,801 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 14:13:52,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-26 14:13:52,801 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-26 14:13:52,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 14:13:52,801 INFO L82 PathProgramCache]: Analyzing trace with hash 11487317, now seen corresponding path program 3 times [2021-08-26 14:13:52,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 14:13:52,802 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220434245] [2021-08-26 14:13:52,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 14:13:52,802 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 14:13:52,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 14:13:52,844 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 14:13:52,844 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 14:13:52,845 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220434245] [2021-08-26 14:13:52,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220434245] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 14:13:52,845 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077403456] [2021-08-26 14:13:52,845 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-26 14:13:52,845 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 14:13:52,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 14:13:52,850 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) [2021-08-26 14:13:52,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-26 14:13:52,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-26 14:13:52,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 14:13:52,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-26 14:13:52,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 14:13:53,020 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 14:13:53,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077403456] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 14:13:53,020 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 14:13:53,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-08-26 14:13:53,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778938730] [2021-08-26 14:13:53,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-26 14:13:53,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 14:13:53,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-26 14:13:53,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-26 14:13:53,021 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:13:53,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 14:13:53,185 INFO L93 Difference]: Finished difference Result 61 states and 147 transitions. [2021-08-26 14:13:53,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-26 14:13:53,185 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 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 11 [2021-08-26 14:13:53,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 14:13:53,187 INFO L225 Difference]: With dead ends: 61 [2021-08-26 14:13:53,187 INFO L226 Difference]: Without dead ends: 49 [2021-08-26 14:13:53,188 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 97.9ms TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2021-08-26 14:13:53,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-08-26 14:13:53,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2021-08-26 14:13:53,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 2.5) internal successors, (105), 42 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) [2021-08-26 14:13:53,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 105 transitions. [2021-08-26 14:13:53,199 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 105 transitions. Word has length 11 [2021-08-26 14:13:53,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 14:13:53,199 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 105 transitions. [2021-08-26 14:13:53,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:13:53,199 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 105 transitions. [2021-08-26 14:13:53,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-26 14:13:53,200 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 14:13:53,200 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 14:13:53,221 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-26 14:13:53,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 14:13:53,421 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-26 14:13:53,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 14:13:53,421 INFO L82 PathProgramCache]: Analyzing trace with hash -766059705, now seen corresponding path program 4 times [2021-08-26 14:13:53,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 14:13:53,421 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099559127] [2021-08-26 14:13:53,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 14:13:53,421 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 14:13:53,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 14:13:53,828 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 14:13:53,828 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 14:13:53,828 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099559127] [2021-08-26 14:13:53,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099559127] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 14:13:53,829 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038534303] [2021-08-26 14:13:53,829 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-26 14:13:53,829 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 14:13:53,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 14:13:53,830 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) [2021-08-26 14:13:53,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-26 14:13:53,892 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-26 14:13:53,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 14:13:53,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-26 14:13:53,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 14:13:53,993 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 14:13:53,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038534303] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 14:13:53,994 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 14:13:53,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-08-26 14:13:53,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174327926] [2021-08-26 14:13:53,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-26 14:13:53,994 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 14:13:53,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-26 14:13:53,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-08-26 14:13:53,995 INFO L87 Difference]: Start difference. First operand 43 states and 105 transitions. Second operand has 9 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:13:54,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 14:13:54,125 INFO L93 Difference]: Finished difference Result 73 states and 174 transitions. [2021-08-26 14:13:54,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-26 14:13:54,126 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 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 11 [2021-08-26 14:13:54,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 14:13:54,126 INFO L225 Difference]: With dead ends: 73 [2021-08-26 14:13:54,126 INFO L226 Difference]: Without dead ends: 63 [2021-08-26 14:13:54,126 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 208.2ms TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-08-26 14:13:54,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-08-26 14:13:54,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 52. [2021-08-26 14:13:54,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 2.4901960784313726) internal successors, (127), 51 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:13:54,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 127 transitions. [2021-08-26 14:13:54,129 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 127 transitions. Word has length 11 [2021-08-26 14:13:54,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 14:13:54,129 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 127 transitions. [2021-08-26 14:13:54,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:13:54,129 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 127 transitions. [2021-08-26 14:13:54,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-26 14:13:54,129 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 14:13:54,130 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 14:13:54,159 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-26 14:13:54,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-08-26 14:13:54,338 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-26 14:13:54,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 14:13:54,338 INFO L82 PathProgramCache]: Analyzing trace with hash -1845297833, now seen corresponding path program 5 times [2021-08-26 14:13:54,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 14:13:54,338 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652238345] [2021-08-26 14:13:54,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 14:13:54,339 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 14:13:54,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 14:13:54,685 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 14:13:54,685 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 14:13:54,685 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652238345] [2021-08-26 14:13:54,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652238345] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 14:13:54,685 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357040097] [2021-08-26 14:13:54,685 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-26 14:13:54,686 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 14:13:54,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 14:13:54,690 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) [2021-08-26 14:13:54,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-26 14:13:54,836 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-26 14:13:54,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 14:13:54,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-26 14:13:54,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 14:13:55,081 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 14:13:55,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357040097] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 14:13:55,082 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 14:13:55,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-08-26 14:13:55,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128109096] [2021-08-26 14:13:55,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-26 14:13:55,082 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 14:13:55,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-26 14:13:55,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-08-26 14:13:55,083 INFO L87 Difference]: Start difference. First operand 52 states and 127 transitions. Second operand has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:13:55,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 14:13:55,377 INFO L93 Difference]: Finished difference Result 71 states and 173 transitions. [2021-08-26 14:13:55,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-26 14:13:55,377 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 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 13 [2021-08-26 14:13:55,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 14:13:55,378 INFO L225 Difference]: With dead ends: 71 [2021-08-26 14:13:55,378 INFO L226 Difference]: Without dead ends: 59 [2021-08-26 14:13:55,378 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 454.4ms TimeCoverageRelationStatistics Valid=148, Invalid=314, Unknown=0, NotChecked=0, Total=462 [2021-08-26 14:13:55,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-08-26 14:13:55,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 56. [2021-08-26 14:13:55,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 2.4909090909090907) internal successors, (137), 55 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:13:55,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 137 transitions. [2021-08-26 14:13:55,386 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 137 transitions. Word has length 13 [2021-08-26 14:13:55,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 14:13:55,387 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 137 transitions. [2021-08-26 14:13:55,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:13:55,387 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 137 transitions. [2021-08-26 14:13:55,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-26 14:13:55,387 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 14:13:55,387 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 14:13:55,411 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-26 14:13:55,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 14:13:55,605 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-26 14:13:55,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 14:13:55,605 INFO L82 PathProgramCache]: Analyzing trace with hash -1743618811, now seen corresponding path program 6 times [2021-08-26 14:13:55,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 14:13:55,605 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832574216] [2021-08-26 14:13:55,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 14:13:55,605 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 14:13:55,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 14:13:55,713 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 14:13:55,713 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 14:13:55,714 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832574216] [2021-08-26 14:13:55,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832574216] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 14:13:55,714 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450720502] [2021-08-26 14:13:55,714 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-26 14:13:55,714 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 14:13:55,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 14:13:55,715 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) [2021-08-26 14:13:55,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-26 14:13:55,857 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-26 14:13:55,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 14:13:55,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-26 14:13:55,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 14:13:55,925 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 14:13:55,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450720502] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 14:13:55,926 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 14:13:55,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-08-26 14:13:55,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511081260] [2021-08-26 14:13:55,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-26 14:13:55,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 14:13:55,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-26 14:13:55,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-08-26 14:13:55,927 INFO L87 Difference]: Start difference. First operand 56 states and 137 transitions. Second operand has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:13:56,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 14:13:56,393 INFO L93 Difference]: Finished difference Result 77 states and 187 transitions. [2021-08-26 14:13:56,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-26 14:13:56,393 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 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 13 [2021-08-26 14:13:56,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 14:13:56,395 INFO L225 Difference]: With dead ends: 77 [2021-08-26 14:13:56,395 INFO L226 Difference]: Without dead ends: 62 [2021-08-26 14:13:56,395 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 178.5ms TimeCoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420 [2021-08-26 14:13:56,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-08-26 14:13:56,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 42. [2021-08-26 14:13:56,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 2.4634146341463414) internal successors, (101), 41 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:13:56,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 101 transitions. [2021-08-26 14:13:56,401 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 101 transitions. Word has length 13 [2021-08-26 14:13:56,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 14:13:56,401 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 101 transitions. [2021-08-26 14:13:56,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:13:56,401 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 101 transitions. [2021-08-26 14:13:56,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-26 14:13:56,402 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 14:13:56,402 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 14:13:56,425 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-26 14:13:56,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 14:13:56,621 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-26 14:13:56,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 14:13:56,621 INFO L82 PathProgramCache]: Analyzing trace with hash 1782402707, now seen corresponding path program 7 times [2021-08-26 14:13:56,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 14:13:56,621 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707220894] [2021-08-26 14:13:56,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 14:13:56,621 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 14:13:56,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 14:13:56,986 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 14:13:56,986 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 14:13:56,986 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707220894] [2021-08-26 14:13:56,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707220894] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 14:13:56,986 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602926877] [2021-08-26 14:13:56,987 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-26 14:13:56,987 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 14:13:56,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 14:13:56,987 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) [2021-08-26 14:13:56,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-26 14:13:57,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 14:13:57,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-26 14:13:57,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 14:13:57,158 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 14:13:57,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602926877] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 14:13:57,158 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 14:13:57,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-08-26 14:13:57,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567439220] [2021-08-26 14:13:57,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-26 14:13:57,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 14:13:57,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-26 14:13:57,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-08-26 14:13:57,164 INFO L87 Difference]: Start difference. First operand 42 states and 101 transitions. Second operand has 12 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:13:57,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 14:13:57,568 INFO L93 Difference]: Finished difference Result 90 states and 215 transitions. [2021-08-26 14:13:57,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-26 14:13:57,569 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 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 14 [2021-08-26 14:13:57,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 14:13:57,569 INFO L225 Difference]: With dead ends: 90 [2021-08-26 14:13:57,569 INFO L226 Difference]: Without dead ends: 76 [2021-08-26 14:13:57,570 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 337.5ms TimeCoverageRelationStatistics Valid=215, Invalid=487, Unknown=0, NotChecked=0, Total=702 [2021-08-26 14:13:57,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-08-26 14:13:57,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 54. [2021-08-26 14:13:57,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.547169811320755) internal successors, (135), 53 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:13:57,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 135 transitions. [2021-08-26 14:13:57,572 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 135 transitions. Word has length 14 [2021-08-26 14:13:57,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 14:13:57,572 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 135 transitions. [2021-08-26 14:13:57,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:13:57,588 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 135 transitions. [2021-08-26 14:13:57,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-26 14:13:57,589 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 14:13:57,589 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 14:13:57,610 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-26 14:13:57,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 14:13:57,793 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-26 14:13:57,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 14:13:57,793 INFO L82 PathProgramCache]: Analyzing trace with hash 490568153, now seen corresponding path program 8 times [2021-08-26 14:13:57,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 14:13:57,793 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922609637] [2021-08-26 14:13:57,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 14:13:57,793 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 14:13:57,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 14:13:57,912 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 14:13:57,912 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 14:13:57,912 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922609637] [2021-08-26 14:13:57,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922609637] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 14:13:57,912 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471669718] [2021-08-26 14:13:57,913 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 14:13:57,913 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 14:13:57,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 14:13:57,913 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) [2021-08-26 14:13:57,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-26 14:13:58,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 14:13:58,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 14:13:58,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-26 14:13:58,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 14:13:58,188 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 14:13:58,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471669718] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 14:13:58,189 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 14:13:58,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-08-26 14:13:58,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101859002] [2021-08-26 14:13:58,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-26 14:13:58,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 14:13:58,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-26 14:13:58,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-08-26 14:13:58,193 INFO L87 Difference]: Start difference. First operand 54 states and 135 transitions. Second operand has 13 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:13:59,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 14:13:59,075 INFO L93 Difference]: Finished difference Result 92 states and 220 transitions. [2021-08-26 14:13:59,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-26 14:13:59,076 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 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 15 [2021-08-26 14:13:59,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 14:13:59,077 INFO L225 Difference]: With dead ends: 92 [2021-08-26 14:13:59,077 INFO L226 Difference]: Without dead ends: 78 [2021-08-26 14:13:59,077 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 649.7ms TimeCoverageRelationStatistics Valid=263, Invalid=607, Unknown=0, NotChecked=0, Total=870 [2021-08-26 14:13:59,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-08-26 14:13:59,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 48. [2021-08-26 14:13:59,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 2.4468085106382977) internal successors, (115), 47 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:13:59,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 115 transitions. [2021-08-26 14:13:59,079 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 115 transitions. Word has length 15 [2021-08-26 14:13:59,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 14:13:59,079 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 115 transitions. [2021-08-26 14:13:59,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:13:59,080 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 115 transitions. [2021-08-26 14:13:59,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-26 14:13:59,080 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 14:13:59,080 INFO L512 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 14:13:59,108 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-26 14:13:59,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 14:13:59,305 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-26 14:13:59,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 14:13:59,305 INFO L82 PathProgramCache]: Analyzing trace with hash -802659181, now seen corresponding path program 9 times [2021-08-26 14:13:59,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 14:13:59,305 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512994602] [2021-08-26 14:13:59,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 14:13:59,305 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 14:13:59,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 14:13:59,433 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-26 14:13:59,433 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 14:13:59,433 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512994602] [2021-08-26 14:13:59,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512994602] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 14:13:59,433 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785260499] [2021-08-26 14:13:59,433 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-26 14:13:59,433 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 14:13:59,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 14:13:59,434 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) [2021-08-26 14:13:59,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-26 14:13:59,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-26 14:13:59,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 14:13:59,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-26 14:13:59,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 14:13:59,749 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-26 14:13:59,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785260499] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 14:13:59,750 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 14:13:59,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-26 14:13:59,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213506720] [2021-08-26 14:13:59,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-26 14:13:59,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 14:13:59,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-26 14:13:59,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-08-26 14:13:59,752 INFO L87 Difference]: Start difference. First operand 48 states and 115 transitions. Second operand has 12 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:14:00,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 14:14:00,028 INFO L93 Difference]: Finished difference Result 78 states and 189 transitions. [2021-08-26 14:14:00,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-26 14:14:00,029 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 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 16 [2021-08-26 14:14:00,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 14:14:00,031 INFO L225 Difference]: With dead ends: 78 [2021-08-26 14:14:00,031 INFO L226 Difference]: Without dead ends: 72 [2021-08-26 14:14:00,031 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 237.1ms TimeCoverageRelationStatistics Valid=221, Invalid=481, Unknown=0, NotChecked=0, Total=702 [2021-08-26 14:14:00,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-08-26 14:14:00,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 57. [2021-08-26 14:14:00,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 2.5535714285714284) internal successors, (143), 56 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:14:00,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 143 transitions. [2021-08-26 14:14:00,040 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 143 transitions. Word has length 16 [2021-08-26 14:14:00,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 14:14:00,041 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 143 transitions. [2021-08-26 14:14:00,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:14:00,041 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 143 transitions. [2021-08-26 14:14:00,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-26 14:14:00,041 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 14:14:00,042 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 14:14:00,088 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-26 14:14:00,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 14:14:00,269 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-26 14:14:00,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 14:14:00,269 INFO L82 PathProgramCache]: Analyzing trace with hash -802657259, now seen corresponding path program 10 times [2021-08-26 14:14:00,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 14:14:00,270 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649302962] [2021-08-26 14:14:00,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 14:14:00,270 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 14:14:00,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 14:14:00,471 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 14:14:00,472 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 14:14:00,472 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649302962] [2021-08-26 14:14:00,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649302962] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 14:14:00,472 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20638541] [2021-08-26 14:14:00,472 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-26 14:14:00,476 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 14:14:00,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 14:14:00,497 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) [2021-08-26 14:14:00,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-26 14:14:00,737 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-26 14:14:00,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 14:14:00,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-26 14:14:00,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 14:14:00,851 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 14:14:00,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20638541] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 14:14:00,851 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 14:14:00,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-08-26 14:14:00,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440326574] [2021-08-26 14:14:00,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-26 14:14:00,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 14:14:00,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-26 14:14:00,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-08-26 14:14:00,855 INFO L87 Difference]: Start difference. First operand 57 states and 143 transitions. Second operand has 13 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:14:01,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 14:14:01,437 INFO L93 Difference]: Finished difference Result 84 states and 205 transitions. [2021-08-26 14:14:01,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-26 14:14:01,439 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 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 16 [2021-08-26 14:14:01,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 14:14:01,439 INFO L225 Difference]: With dead ends: 84 [2021-08-26 14:14:01,439 INFO L226 Difference]: Without dead ends: 70 [2021-08-26 14:14:01,439 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 493.0ms TimeCoverageRelationStatistics Valid=293, Invalid=637, Unknown=0, NotChecked=0, Total=930 [2021-08-26 14:14:01,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-08-26 14:14:01,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 46. [2021-08-26 14:14:01,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 2.488888888888889) internal successors, (112), 45 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:14:01,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 112 transitions. [2021-08-26 14:14:01,441 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 112 transitions. Word has length 16 [2021-08-26 14:14:01,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 14:14:01,441 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 112 transitions. [2021-08-26 14:14:01,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:14:01,441 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 112 transitions. [2021-08-26 14:14:01,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-26 14:14:01,442 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 14:14:01,442 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 14:14:01,469 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-26 14:14:01,660 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,SelfDestructingSolverStorable11 [2021-08-26 14:14:01,661 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-26 14:14:01,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 14:14:01,661 INFO L82 PathProgramCache]: Analyzing trace with hash -1010115109, now seen corresponding path program 11 times [2021-08-26 14:14:01,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 14:14:01,661 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898809750] [2021-08-26 14:14:01,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 14:14:01,661 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 14:14:01,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 14:14:01,875 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 14:14:01,875 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 14:14:01,875 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898809750] [2021-08-26 14:14:01,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898809750] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 14:14:01,875 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69487673] [2021-08-26 14:14:01,875 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-26 14:14:01,876 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 14:14:01,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 14:14:01,897 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) [2021-08-26 14:14:01,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-26 14:14:02,018 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-26 14:14:02,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 14:14:02,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-26 14:14:02,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 14:14:02,134 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 14:14:02,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69487673] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 14:14:02,134 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 14:14:02,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-08-26 14:14:02,135 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051748970] [2021-08-26 14:14:02,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-26 14:14:02,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 14:14:02,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-26 14:14:02,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-08-26 14:14:02,136 INFO L87 Difference]: Start difference. First operand 46 states and 112 transitions. Second operand has 15 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 14 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:14:02,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 14:14:02,511 INFO L93 Difference]: Finished difference Result 98 states and 236 transitions. [2021-08-26 14:14:02,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-26 14:14:02,512 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 14 states have internal predecessors, (20), 0 states have call successors, (0), 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 17 [2021-08-26 14:14:02,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 14:14:02,512 INFO L225 Difference]: With dead ends: 98 [2021-08-26 14:14:02,512 INFO L226 Difference]: Without dead ends: 84 [2021-08-26 14:14:02,513 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 426.3ms TimeCoverageRelationStatistics Valid=379, Invalid=881, Unknown=0, NotChecked=0, Total=1260 [2021-08-26 14:14:02,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-08-26 14:14:02,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 63. [2021-08-26 14:14:02,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 2.564516129032258) internal successors, (159), 62 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:14:02,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 159 transitions. [2021-08-26 14:14:02,516 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 159 transitions. Word has length 17 [2021-08-26 14:14:02,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 14:14:02,516 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 159 transitions. [2021-08-26 14:14:02,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 14 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:14:02,516 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 159 transitions. [2021-08-26 14:14:02,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-26 14:14:02,516 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 14:14:02,516 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 14:14:02,536 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-26 14:14:02,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-08-26 14:14:02,733 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-26 14:14:02,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 14:14:02,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1740779799, now seen corresponding path program 12 times [2021-08-26 14:14:02,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 14:14:02,733 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949317313] [2021-08-26 14:14:02,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 14:14:02,733 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 14:14:02,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 14:14:02,837 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 14:14:02,837 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 14:14:02,837 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949317313] [2021-08-26 14:14:02,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949317313] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 14:14:02,837 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971215286] [2021-08-26 14:14:02,837 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-26 14:14:02,838 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 14:14:02,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 14:14:02,838 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) [2021-08-26 14:14:02,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-26 14:14:02,934 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-26 14:14:02,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 14:14:02,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-26 14:14:02,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 14:14:03,011 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 14:14:03,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971215286] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 14:14:03,011 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 14:14:03,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-08-26 14:14:03,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135229708] [2021-08-26 14:14:03,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-26 14:14:03,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 14:14:03,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-26 14:14:03,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-08-26 14:14:03,012 INFO L87 Difference]: Start difference. First operand 63 states and 159 transitions. Second operand has 16 states, 15 states have (on average 1.4) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:14:03,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 14:14:03,368 INFO L93 Difference]: Finished difference Result 104 states and 249 transitions. [2021-08-26 14:14:03,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-26 14:14:03,368 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.4) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 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 18 [2021-08-26 14:14:03,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 14:14:03,369 INFO L225 Difference]: With dead ends: 104 [2021-08-26 14:14:03,369 INFO L226 Difference]: Without dead ends: 90 [2021-08-26 14:14:03,369 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 318.6ms TimeCoverageRelationStatistics Valid=447, Invalid=1035, Unknown=0, NotChecked=0, Total=1482 [2021-08-26 14:14:03,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-08-26 14:14:03,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 52. [2021-08-26 14:14:03,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 2.4705882352941178) internal successors, (126), 51 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) [2021-08-26 14:14:03,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 126 transitions. [2021-08-26 14:14:03,371 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 126 transitions. Word has length 18 [2021-08-26 14:14:03,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 14:14:03,371 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 126 transitions. [2021-08-26 14:14:03,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.4) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:14:03,371 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 126 transitions. [2021-08-26 14:14:03,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-26 14:14:03,371 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 14:14:03,371 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 14:14:03,391 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-26 14:14:03,588 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,SelfDestructingSolverStorable13 [2021-08-26 14:14:03,588 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-26 14:14:03,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 14:14:03,589 INFO L82 PathProgramCache]: Analyzing trace with hash -57720357, now seen corresponding path program 13 times [2021-08-26 14:14:03,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 14:14:03,590 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584052409] [2021-08-26 14:14:03,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 14:14:03,590 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 14:14:03,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 14:14:03,704 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-26 14:14:03,704 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 14:14:03,704 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584052409] [2021-08-26 14:14:03,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584052409] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 14:14:03,705 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797697496] [2021-08-26 14:14:03,705 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-26 14:14:03,705 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 14:14:03,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 14:14:03,706 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) [2021-08-26 14:14:03,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-26 14:14:03,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 14:14:03,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-26 14:14:03,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 14:14:03,886 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-26 14:14:03,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797697496] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 14:14:03,886 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 14:14:03,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-08-26 14:14:03,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510950537] [2021-08-26 14:14:03,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-26 14:14:03,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 14:14:03,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-26 14:14:03,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-08-26 14:14:03,887 INFO L87 Difference]: Start difference. First operand 52 states and 126 transitions. Second operand has 15 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:14:04,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 14:14:04,216 INFO L93 Difference]: Finished difference Result 90 states and 219 transitions. [2021-08-26 14:14:04,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-26 14:14:04,216 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 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 19 [2021-08-26 14:14:04,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 14:14:04,217 INFO L225 Difference]: With dead ends: 90 [2021-08-26 14:14:04,217 INFO L226 Difference]: Without dead ends: 84 [2021-08-26 14:14:04,218 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 324.2ms TimeCoverageRelationStatistics Valid=425, Invalid=835, Unknown=0, NotChecked=0, Total=1260 [2021-08-26 14:14:04,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-08-26 14:14:04,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 66. [2021-08-26 14:14:04,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 2.5692307692307694) internal successors, (167), 65 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:14:04,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 167 transitions. [2021-08-26 14:14:04,220 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 167 transitions. Word has length 19 [2021-08-26 14:14:04,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 14:14:04,221 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 167 transitions. [2021-08-26 14:14:04,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:14:04,221 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 167 transitions. [2021-08-26 14:14:04,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-26 14:14:04,221 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 14:14:04,221 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 14:14:04,238 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-26 14:14:04,436 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,SelfDestructingSolverStorable14 [2021-08-26 14:14:04,437 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-26 14:14:04,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 14:14:04,437 INFO L82 PathProgramCache]: Analyzing trace with hash -57718435, now seen corresponding path program 14 times [2021-08-26 14:14:04,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 14:14:04,437 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308031048] [2021-08-26 14:14:04,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 14:14:04,437 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 14:14:04,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 14:14:04,557 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 14:14:04,558 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 14:14:04,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308031048] [2021-08-26 14:14:04,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308031048] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 14:14:04,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335614949] [2021-08-26 14:14:04,558 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 14:14:04,559 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 14:14:04,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 14:14:04,562 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) [2021-08-26 14:14:04,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-26 14:14:04,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 14:14:04,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 14:14:04,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-26 14:14:04,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 14:14:04,779 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 14:14:04,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335614949] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 14:14:04,780 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 14:14:04,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-08-26 14:14:04,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585649556] [2021-08-26 14:14:04,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-26 14:14:04,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 14:14:04,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-26 14:14:04,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-08-26 14:14:04,781 INFO L87 Difference]: Start difference. First operand 66 states and 167 transitions. Second operand has 17 states, 16 states have (on average 1.375) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:14:05,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 14:14:05,199 INFO L93 Difference]: Finished difference Result 108 states and 260 transitions. [2021-08-26 14:14:05,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-26 14:14:05,199 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.375) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 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 19 [2021-08-26 14:14:05,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 14:14:05,200 INFO L225 Difference]: With dead ends: 108 [2021-08-26 14:14:05,200 INFO L226 Difference]: Without dead ends: 94 [2021-08-26 14:14:05,200 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 376.3ms TimeCoverageRelationStatistics Valid=517, Invalid=1205, Unknown=0, NotChecked=0, Total=1722 [2021-08-26 14:14:05,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-08-26 14:14:05,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 56. [2021-08-26 14:14:05,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 2.4545454545454546) internal successors, (135), 55 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:14:05,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 135 transitions. [2021-08-26 14:14:05,202 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 135 transitions. Word has length 19 [2021-08-26 14:14:05,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 14:14:05,202 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 135 transitions. [2021-08-26 14:14:05,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.375) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:14:05,202 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 135 transitions. [2021-08-26 14:14:05,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-26 14:14:05,203 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 14:14:05,203 INFO L512 BasicCegarLoop]: trace histogram [7, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 14:14:05,220 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-26 14:14:05,420 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,SelfDestructingSolverStorable15 [2021-08-26 14:14:05,421 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-26 14:14:05,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 14:14:05,422 INFO L82 PathProgramCache]: Analyzing trace with hash 2147399191, now seen corresponding path program 15 times [2021-08-26 14:14:05,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 14:14:05,422 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680151413] [2021-08-26 14:14:05,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 14:14:05,422 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 14:14:05,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 14:14:05,524 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-26 14:14:05,524 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 14:14:05,525 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680151413] [2021-08-26 14:14:05,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680151413] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 14:14:05,525 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642837870] [2021-08-26 14:14:05,525 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-26 14:14:05,525 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 14:14:05,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 14:14:05,526 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) [2021-08-26 14:14:05,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-26 14:14:05,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-26 14:14:05,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 14:14:05,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-26 14:14:05,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 14:14:05,758 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-26 14:14:05,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642837870] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 14:14:05,759 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 14:14:05,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-08-26 14:14:05,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004738911] [2021-08-26 14:14:05,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-26 14:14:05,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 14:14:05,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-26 14:14:05,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-08-26 14:14:05,760 INFO L87 Difference]: Start difference. First operand 56 states and 135 transitions. Second operand has 16 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:14:06,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 14:14:06,132 INFO L93 Difference]: Finished difference Result 94 states and 229 transitions. [2021-08-26 14:14:06,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-26 14:14:06,132 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 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 20 [2021-08-26 14:14:06,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 14:14:06,133 INFO L225 Difference]: With dead ends: 94 [2021-08-26 14:14:06,133 INFO L226 Difference]: Without dead ends: 88 [2021-08-26 14:14:06,133 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 316.7ms TimeCoverageRelationStatistics Valid=442, Invalid=1040, Unknown=0, NotChecked=0, Total=1482 [2021-08-26 14:14:06,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-08-26 14:14:06,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 69. [2021-08-26 14:14:06,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 2.573529411764706) internal successors, (175), 68 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:14:06,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 175 transitions. [2021-08-26 14:14:06,135 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 175 transitions. Word has length 20 [2021-08-26 14:14:06,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 14:14:06,135 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 175 transitions. [2021-08-26 14:14:06,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:14:06,135 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 175 transitions. [2021-08-26 14:14:06,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-26 14:14:06,136 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 14:14:06,136 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 14:14:06,156 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-08-26 14:14:06,355 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,SelfDestructingSolverStorable16 [2021-08-26 14:14:06,355 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-26 14:14:06,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 14:14:06,355 INFO L82 PathProgramCache]: Analyzing trace with hash 2147401113, now seen corresponding path program 16 times [2021-08-26 14:14:06,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 14:14:06,356 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739182515] [2021-08-26 14:14:06,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 14:14:06,356 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 14:14:06,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 14:14:06,459 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 14:14:06,459 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 14:14:06,459 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739182515] [2021-08-26 14:14:06,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739182515] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 14:14:06,459 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293077959] [2021-08-26 14:14:06,459 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-26 14:14:06,460 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 14:14:06,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 14:14:06,460 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) [2021-08-26 14:14:06,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-26 14:14:06,588 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-26 14:14:06,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 14:14:06,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-26 14:14:06,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 14:14:06,679 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 14:14:06,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293077959] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 14:14:06,680 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 14:14:06,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-08-26 14:14:06,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437892090] [2021-08-26 14:14:06,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-26 14:14:06,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 14:14:06,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-26 14:14:06,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-08-26 14:14:06,680 INFO L87 Difference]: Start difference. First operand 69 states and 175 transitions. Second operand has 17 states, 16 states have (on average 1.375) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:14:07,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 14:14:07,134 INFO L93 Difference]: Finished difference Result 100 states and 245 transitions. [2021-08-26 14:14:07,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-26 14:14:07,135 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.375) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 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 20 [2021-08-26 14:14:07,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 14:14:07,136 INFO L225 Difference]: With dead ends: 100 [2021-08-26 14:14:07,136 INFO L226 Difference]: Without dead ends: 86 [2021-08-26 14:14:07,136 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 411.1ms TimeCoverageRelationStatistics Valid=561, Invalid=1245, Unknown=0, NotChecked=0, Total=1806 [2021-08-26 14:14:07,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-08-26 14:14:07,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 54. [2021-08-26 14:14:07,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.490566037735849) internal successors, (132), 53 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:14:07,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 132 transitions. [2021-08-26 14:14:07,138 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 132 transitions. Word has length 20 [2021-08-26 14:14:07,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 14:14:07,138 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 132 transitions. [2021-08-26 14:14:07,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.375) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:14:07,138 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 132 transitions. [2021-08-26 14:14:07,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-26 14:14:07,138 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 14:14:07,138 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 14:14:07,157 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-08-26 14:14:07,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 14:14:07,349 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-26 14:14:07,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 14:14:07,349 INFO L82 PathProgramCache]: Analyzing trace with hash 367451231, now seen corresponding path program 17 times [2021-08-26 14:14:07,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 14:14:07,349 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779244781] [2021-08-26 14:14:07,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 14:14:07,350 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 14:14:07,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 14:14:07,460 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 14:14:07,460 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 14:14:07,460 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779244781] [2021-08-26 14:14:07,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779244781] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 14:14:07,460 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745055476] [2021-08-26 14:14:07,461 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-26 14:14:07,461 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 14:14:07,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 14:14:07,461 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) [2021-08-26 14:14:07,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-26 14:14:07,599 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-26 14:14:07,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 14:14:07,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-26 14:14:07,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 14:14:07,674 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 14:14:07,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745055476] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 14:14:07,674 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 14:14:07,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-08-26 14:14:07,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552075706] [2021-08-26 14:14:07,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-26 14:14:07,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 14:14:07,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-26 14:14:07,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-08-26 14:14:07,676 INFO L87 Difference]: Start difference. First operand 54 states and 132 transitions. Second operand has 19 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:14:08,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 14:14:08,155 INFO L93 Difference]: Finished difference Result 114 states and 276 transitions. [2021-08-26 14:14:08,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-26 14:14:08,155 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 0 states have call successors, (0), 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 21 [2021-08-26 14:14:08,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 14:14:08,156 INFO L225 Difference]: With dead ends: 114 [2021-08-26 14:14:08,156 INFO L226 Difference]: Without dead ends: 100 [2021-08-26 14:14:08,156 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 443.7ms TimeCoverageRelationStatistics Valid=677, Invalid=1579, Unknown=0, NotChecked=0, Total=2256 [2021-08-26 14:14:08,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-08-26 14:14:08,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 75. [2021-08-26 14:14:08,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.581081081081081) internal successors, (191), 74 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:14:08,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 191 transitions. [2021-08-26 14:14:08,158 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 191 transitions. Word has length 21 [2021-08-26 14:14:08,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 14:14:08,158 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 191 transitions. [2021-08-26 14:14:08,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:14:08,158 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 191 transitions. [2021-08-26 14:14:08,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-26 14:14:08,158 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 14:14:08,158 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 14:14:08,177 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-08-26 14:14:08,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 14:14:08,375 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-26 14:14:08,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 14:14:08,376 INFO L82 PathProgramCache]: Analyzing trace with hash 2068459931, now seen corresponding path program 18 times [2021-08-26 14:14:08,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 14:14:08,376 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955745685] [2021-08-26 14:14:08,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 14:14:08,376 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 14:14:08,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 14:14:08,503 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 14:14:08,504 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 14:14:08,505 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955745685] [2021-08-26 14:14:08,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955745685] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 14:14:08,505 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342625396] [2021-08-26 14:14:08,505 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-26 14:14:08,505 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 14:14:08,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 14:14:08,553 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) [2021-08-26 14:14:08,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-26 14:14:08,696 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-26 14:14:08,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 14:14:08,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-26 14:14:08,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 14:14:08,812 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 14:14:08,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342625396] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 14:14:08,812 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 14:14:08,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-08-26 14:14:08,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297827824] [2021-08-26 14:14:08,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-26 14:14:08,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 14:14:08,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-26 14:14:08,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2021-08-26 14:14:08,814 INFO L87 Difference]: Start difference. First operand 75 states and 191 transitions. Second operand has 20 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 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) [2021-08-26 14:14:09,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 14:14:09,385 INFO L93 Difference]: Finished difference Result 120 states and 289 transitions. [2021-08-26 14:14:09,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-26 14:14:09,387 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 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 22 [2021-08-26 14:14:09,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 14:14:09,388 INFO L225 Difference]: With dead ends: 120 [2021-08-26 14:14:09,388 INFO L226 Difference]: Without dead ends: 106 [2021-08-26 14:14:09,388 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 628 ImplicationChecksByTransitivity, 525.5ms TimeCoverageRelationStatistics Valid=767, Invalid=1783, Unknown=0, NotChecked=0, Total=2550 [2021-08-26 14:14:09,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-08-26 14:14:09,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 60. [2021-08-26 14:14:09,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 2.4745762711864407) internal successors, (146), 59 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) [2021-08-26 14:14:09,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 146 transitions. [2021-08-26 14:14:09,390 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 146 transitions. Word has length 22 [2021-08-26 14:14:09,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 14:14:09,390 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 146 transitions. [2021-08-26 14:14:09,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 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) [2021-08-26 14:14:09,391 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 146 transitions. [2021-08-26 14:14:09,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-26 14:14:09,391 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 14:14:09,391 INFO L512 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 14:14:09,419 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-08-26 14:14:09,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 14:14:09,605 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-26 14:14:09,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 14:14:09,605 INFO L82 PathProgramCache]: Analyzing trace with hash 933605215, now seen corresponding path program 19 times [2021-08-26 14:14:09,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 14:14:09,605 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573593233] [2021-08-26 14:14:09,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 14:14:09,605 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 14:14:09,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 14:14:09,779 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-26 14:14:09,779 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 14:14:09,779 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573593233] [2021-08-26 14:14:09,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573593233] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 14:14:09,779 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956896484] [2021-08-26 14:14:09,779 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-26 14:14:09,780 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 14:14:09,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 14:14:09,783 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) [2021-08-26 14:14:09,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-08-26 14:14:09,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 14:14:09,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-26 14:14:09,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 14:14:10,041 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-26 14:14:10,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956896484] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 14:14:10,042 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 14:14:10,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-08-26 14:14:10,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769366757] [2021-08-26 14:14:10,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-26 14:14:10,043 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 14:14:10,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-26 14:14:10,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2021-08-26 14:14:10,044 INFO L87 Difference]: Start difference. First operand 60 states and 146 transitions. Second operand has 19 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 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) [2021-08-26 14:14:10,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 14:14:10,514 INFO L93 Difference]: Finished difference Result 106 states and 259 transitions. [2021-08-26 14:14:10,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-26 14:14:10,514 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 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 23 [2021-08-26 14:14:10,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 14:14:10,515 INFO L225 Difference]: With dead ends: 106 [2021-08-26 14:14:10,515 INFO L226 Difference]: Without dead ends: 100 [2021-08-26 14:14:10,516 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 586 ImplicationChecksByTransitivity, 473.4ms TimeCoverageRelationStatistics Valid=745, Invalid=1511, Unknown=0, NotChecked=0, Total=2256 [2021-08-26 14:14:10,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-08-26 14:14:10,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 78. [2021-08-26 14:14:10,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.5844155844155843) internal successors, (199), 77 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:14:10,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 199 transitions. [2021-08-26 14:14:10,520 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 199 transitions. Word has length 23 [2021-08-26 14:14:10,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 14:14:10,520 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 199 transitions. [2021-08-26 14:14:10,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 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) [2021-08-26 14:14:10,521 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 199 transitions. [2021-08-26 14:14:10,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-26 14:14:10,522 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 14:14:10,522 INFO L512 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 14:14:10,542 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-08-26 14:14:10,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 14:14:10,733 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-26 14:14:10,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 14:14:10,733 INFO L82 PathProgramCache]: Analyzing trace with hash 933607137, now seen corresponding path program 20 times [2021-08-26 14:14:10,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 14:14:10,733 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310694649] [2021-08-26 14:14:10,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 14:14:10,733 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 14:14:10,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 14:14:10,847 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 14:14:10,847 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 14:14:10,847 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310694649] [2021-08-26 14:14:10,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310694649] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 14:14:10,848 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666811953] [2021-08-26 14:14:10,848 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 14:14:10,848 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 14:14:10,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 14:14:10,848 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) [2021-08-26 14:14:10,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-08-26 14:14:11,013 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 14:14:11,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 14:14:11,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-26 14:14:11,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 14:14:11,178 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 14:14:11,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666811953] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 14:14:11,178 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 14:14:11,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-08-26 14:14:11,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247608960] [2021-08-26 14:14:11,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-26 14:14:11,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 14:14:11,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-26 14:14:11,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2021-08-26 14:14:11,180 INFO L87 Difference]: Start difference. First operand 78 states and 199 transitions. Second operand has 20 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 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) [2021-08-26 14:14:11,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 14:14:11,882 INFO L93 Difference]: Finished difference Result 112 states and 275 transitions. [2021-08-26 14:14:11,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-26 14:14:11,882 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 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 23 [2021-08-26 14:14:11,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 14:14:11,883 INFO L225 Difference]: With dead ends: 112 [2021-08-26 14:14:11,883 INFO L226 Difference]: Without dead ends: 100 [2021-08-26 14:14:11,883 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 680 ImplicationChecksByTransitivity, 628.8ms TimeCoverageRelationStatistics Valid=818, Invalid=1834, Unknown=0, NotChecked=0, Total=2652 [2021-08-26 14:14:11,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-08-26 14:14:11,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 81. [2021-08-26 14:14:11,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 2.5875) internal successors, (207), 80 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:14:11,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 207 transitions. [2021-08-26 14:14:11,893 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 207 transitions. Word has length 23 [2021-08-26 14:14:11,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 14:14:11,893 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 207 transitions. [2021-08-26 14:14:11,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 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) [2021-08-26 14:14:11,894 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 207 transitions. [2021-08-26 14:14:11,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-26 14:14:11,894 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 14:14:11,894 INFO L512 BasicCegarLoop]: trace histogram [9, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 14:14:11,957 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-08-26 14:14:12,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 14:14:12,101 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-26 14:14:12,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 14:14:12,101 INFO L82 PathProgramCache]: Analyzing trace with hash -779573861, now seen corresponding path program 21 times [2021-08-26 14:14:12,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 14:14:12,101 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176954219] [2021-08-26 14:14:12,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 14:14:12,101 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 14:14:12,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 14:14:12,346 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-26 14:14:12,346 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 14:14:12,347 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176954219] [2021-08-26 14:14:12,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176954219] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 14:14:12,347 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740578914] [2021-08-26 14:14:12,347 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-26 14:14:12,347 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 14:14:12,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 14:14:12,348 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 14:14:12,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-08-26 14:14:12,594 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-08-26 14:14:12,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 14:14:12,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-26 14:14:12,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 14:14:12,726 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-26 14:14:12,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740578914] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 14:14:12,726 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 14:14:12,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-08-26 14:14:12,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923405408] [2021-08-26 14:14:12,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-26 14:14:12,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 14:14:12,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-26 14:14:12,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2021-08-26 14:14:12,728 INFO L87 Difference]: Start difference. First operand 81 states and 207 transitions. Second operand has 20 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:14:13,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 14:14:13,589 INFO L93 Difference]: Finished difference Result 108 states and 265 transitions. [2021-08-26 14:14:13,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-26 14:14:13,601 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 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 24 [2021-08-26 14:14:13,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 14:14:13,601 INFO L225 Difference]: With dead ends: 108 [2021-08-26 14:14:13,601 INFO L226 Difference]: Without dead ends: 102 [2021-08-26 14:14:13,602 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 611 ImplicationChecksByTransitivity, 741.8ms TimeCoverageRelationStatistics Valid=739, Invalid=1811, Unknown=0, NotChecked=0, Total=2550 [2021-08-26 14:14:13,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-08-26 14:14:13,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 62. [2021-08-26 14:14:13,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.4754098360655736) internal successors, (151), 61 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:14:13,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 151 transitions. [2021-08-26 14:14:13,604 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 151 transitions. Word has length 24 [2021-08-26 14:14:13,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 14:14:13,604 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 151 transitions. [2021-08-26 14:14:13,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:14:13,604 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 151 transitions. [2021-08-26 14:14:13,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-26 14:14:13,604 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 14:14:13,604 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 14:14:13,640 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-08-26 14:14:13,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 14:14:13,809 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-26 14:14:13,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 14:14:13,809 INFO L82 PathProgramCache]: Analyzing trace with hash -779571939, now seen corresponding path program 22 times [2021-08-26 14:14:13,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 14:14:13,809 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070808511] [2021-08-26 14:14:13,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 14:14:13,809 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 14:14:13,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 14:14:14,503 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 14:14:14,504 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 14:14:14,504 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070808511] [2021-08-26 14:14:14,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070808511] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 14:14:14,504 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65960937] [2021-08-26 14:14:14,504 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-26 14:14:14,504 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 14:14:14,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 14:14:14,505 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 14:14:14,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-08-26 14:14:14,735 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-26 14:14:14,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 14:14:14,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-26 14:14:14,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 14:14:14,820 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 14:14:14,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65960937] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 14:14:14,821 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 14:14:14,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-08-26 14:14:14,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336007483] [2021-08-26 14:14:14,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-26 14:14:14,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 14:14:14,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-26 14:14:14,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2021-08-26 14:14:14,822 INFO L87 Difference]: Start difference. First operand 62 states and 151 transitions. Second operand has 21 states, 20 states have (on average 1.3) internal successors, (26), 20 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:14:15,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 14:14:15,691 INFO L93 Difference]: Finished difference Result 114 states and 281 transitions. [2021-08-26 14:14:15,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-26 14:14:15,691 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.3) internal successors, (26), 20 states have internal predecessors, (26), 0 states have call successors, (0), 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 24 [2021-08-26 14:14:15,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 14:14:15,692 INFO L225 Difference]: With dead ends: 114 [2021-08-26 14:14:15,692 INFO L226 Difference]: Without dead ends: 102 [2021-08-26 14:14:15,693 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 1061.4ms TimeCoverageRelationStatistics Valid=917, Invalid=2053, Unknown=0, NotChecked=0, Total=2970 [2021-08-26 14:14:15,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-08-26 14:14:15,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 62. [2021-08-26 14:14:15,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.4918032786885247) internal successors, (152), 61 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:14:15,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 152 transitions. [2021-08-26 14:14:15,694 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 152 transitions. Word has length 24 [2021-08-26 14:14:15,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 14:14:15,694 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 152 transitions. [2021-08-26 14:14:15,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.3) internal successors, (26), 20 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:14:15,694 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 152 transitions. [2021-08-26 14:14:15,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-26 14:14:15,695 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 14:14:15,695 INFO L512 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 14:14:15,719 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-08-26 14:14:15,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-08-26 14:14:15,897 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-26 14:14:15,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 14:14:15,897 INFO L82 PathProgramCache]: Analyzing trace with hash -451413789, now seen corresponding path program 23 times [2021-08-26 14:14:15,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 14:14:15,897 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666821109] [2021-08-26 14:14:15,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 14:14:15,897 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 14:14:15,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 14:14:16,166 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 14:14:16,166 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 14:14:16,166 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666821109] [2021-08-26 14:14:16,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666821109] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 14:14:16,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101382174] [2021-08-26 14:14:16,167 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-26 14:14:16,167 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 14:14:16,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 14:14:16,169 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 14:14:16,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-08-26 14:14:16,407 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-08-26 14:14:16,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 14:14:16,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-26 14:14:16,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 14:14:16,729 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 14:14:16,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101382174] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 14:14:16,729 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 14:14:16,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-08-26 14:14:16,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248248949] [2021-08-26 14:14:16,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-26 14:14:16,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 14:14:16,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-26 14:14:16,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2021-08-26 14:14:16,731 INFO L87 Difference]: Start difference. First operand 62 states and 152 transitions. Second operand has 22 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 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) [2021-08-26 14:14:17,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 14:14:17,405 INFO L93 Difference]: Finished difference Result 118 states and 291 transitions. [2021-08-26 14:14:17,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-26 14:14:17,405 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 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 25 [2021-08-26 14:14:17,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 14:14:17,406 INFO L225 Difference]: With dead ends: 118 [2021-08-26 14:14:17,406 INFO L226 Difference]: Without dead ends: 106 [2021-08-26 14:14:17,407 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 869 ImplicationChecksByTransitivity, 686.1ms TimeCoverageRelationStatistics Valid=1018, Invalid=2288, Unknown=0, NotChecked=0, Total=3306 [2021-08-26 14:14:17,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-08-26 14:14:17,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 66. [2021-08-26 14:14:17,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 2.476923076923077) internal successors, (161), 65 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:14:17,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 161 transitions. [2021-08-26 14:14:17,408 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 161 transitions. Word has length 25 [2021-08-26 14:14:17,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 14:14:17,408 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 161 transitions. [2021-08-26 14:14:17,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 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) [2021-08-26 14:14:17,408 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 161 transitions. [2021-08-26 14:14:17,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-26 14:14:17,409 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 14:14:17,409 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 14:14:17,441 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-08-26 14:14:17,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-08-26 14:14:17,629 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-26 14:14:17,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 14:14:17,629 INFO L82 PathProgramCache]: Analyzing trace with hash -1844031457, now seen corresponding path program 24 times [2021-08-26 14:14:17,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 14:14:17,629 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968707933] [2021-08-26 14:14:17,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 14:14:17,629 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 14:14:17,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 14:14:18,422 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 14:14:18,422 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 14:14:18,422 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968707933] [2021-08-26 14:14:18,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968707933] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 14:14:18,422 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332420936] [2021-08-26 14:14:18,422 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-26 14:14:18,422 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 14:14:18,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 14:14:18,423 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 14:14:18,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-08-26 14:14:18,671 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-08-26 14:14:18,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 14:14:18,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-26 14:14:18,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 14:14:18,872 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 14:14:18,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332420936] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 14:14:18,873 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 14:14:18,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-08-26 14:14:18,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076844328] [2021-08-26 14:14:18,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-26 14:14:18,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 14:14:18,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-26 14:14:18,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=389, Unknown=0, NotChecked=0, Total=506 [2021-08-26 14:14:18,875 INFO L87 Difference]: Start difference. First operand 66 states and 161 transitions. Second operand has 23 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:14:20,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 14:14:20,162 INFO L93 Difference]: Finished difference Result 122 states and 301 transitions. [2021-08-26 14:14:20,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-26 14:14:20,163 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 states have internal predecessors, (28), 0 states have call successors, (0), 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 26 [2021-08-26 14:14:20,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 14:14:20,163 INFO L225 Difference]: With dead ends: 122 [2021-08-26 14:14:20,163 INFO L226 Difference]: Without dead ends: 110 [2021-08-26 14:14:20,164 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 932 ImplicationChecksByTransitivity, 1362.6ms TimeCoverageRelationStatistics Valid=1128, Invalid=2532, Unknown=0, NotChecked=0, Total=3660 [2021-08-26 14:14:20,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-08-26 14:14:20,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 66. [2021-08-26 14:14:20,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 2.4923076923076923) internal successors, (162), 65 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:14:20,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 162 transitions. [2021-08-26 14:14:20,166 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 162 transitions. Word has length 26 [2021-08-26 14:14:20,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 14:14:20,166 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 162 transitions. [2021-08-26 14:14:20,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:14:20,166 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 162 transitions. [2021-08-26 14:14:20,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-26 14:14:20,166 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 14:14:20,166 INFO L512 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 14:14:20,189 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-08-26 14:14:20,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-08-26 14:14:20,377 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-26 14:14:20,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 14:14:20,377 INFO L82 PathProgramCache]: Analyzing trace with hash -16661915, now seen corresponding path program 25 times [2021-08-26 14:14:20,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 14:14:20,377 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805797178] [2021-08-26 14:14:20,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 14:14:20,377 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 14:14:20,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 14:14:20,787 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 14:14:20,787 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 14:14:20,787 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805797178] [2021-08-26 14:14:20,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805797178] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 14:14:20,787 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351565443] [2021-08-26 14:14:20,787 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-26 14:14:20,787 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 14:14:20,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 14:14:20,788 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 14:14:20,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-08-26 14:14:21,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 14:14:21,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-26 14:14:21,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 14:14:21,151 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 14:14:21,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351565443] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 14:14:21,152 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 14:14:21,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-08-26 14:14:21,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479939330] [2021-08-26 14:14:21,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-26 14:14:21,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 14:14:21,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-26 14:14:21,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=424, Unknown=0, NotChecked=0, Total=552 [2021-08-26 14:14:21,160 INFO L87 Difference]: Start difference. First operand 66 states and 162 transitions. Second operand has 24 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:14:22,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 14:14:22,073 INFO L93 Difference]: Finished difference Result 126 states and 311 transitions. [2021-08-26 14:14:22,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-26 14:14:22,074 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-26 14:14:22,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 14:14:22,074 INFO L225 Difference]: With dead ends: 126 [2021-08-26 14:14:22,074 INFO L226 Difference]: Without dead ends: 114 [2021-08-26 14:14:22,075 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 870.4ms TimeCoverageRelationStatistics Valid=1240, Invalid=2792, Unknown=0, NotChecked=0, Total=4032 [2021-08-26 14:14:22,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-08-26 14:14:22,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 70. [2021-08-26 14:14:22,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 2.4782608695652173) internal successors, (171), 69 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:14:22,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 171 transitions. [2021-08-26 14:14:22,082 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 171 transitions. Word has length 27 [2021-08-26 14:14:22,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 14:14:22,082 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 171 transitions. [2021-08-26 14:14:22,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:14:22,083 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 171 transitions. [2021-08-26 14:14:22,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-26 14:14:22,083 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 14:14:22,083 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 14:14:22,116 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-08-26 14:14:22,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 14:14:22,297 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-26 14:14:22,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 14:14:22,297 INFO L82 PathProgramCache]: Analyzing trace with hash 1707555489, now seen corresponding path program 26 times [2021-08-26 14:14:22,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 14:14:22,297 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043357582] [2021-08-26 14:14:22,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 14:14:22,297 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 14:14:22,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 14:14:22,834 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 14:14:22,834 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 14:14:22,834 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043357582] [2021-08-26 14:14:22,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043357582] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 14:14:22,834 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984687563] [2021-08-26 14:14:22,834 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 14:14:22,834 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 14:14:22,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 14:14:22,836 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 14:14:22,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-08-26 14:14:23,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 14:14:23,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 14:14:23,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-26 14:14:23,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 14:14:23,299 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 14:14:23,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984687563] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 14:14:23,300 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 14:14:23,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-08-26 14:14:23,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852988384] [2021-08-26 14:14:23,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-26 14:14:23,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 14:14:23,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-26 14:14:23,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=461, Unknown=0, NotChecked=0, Total=600 [2021-08-26 14:14:23,301 INFO L87 Difference]: Start difference. First operand 70 states and 171 transitions. Second operand has 25 states, 24 states have (on average 1.25) internal successors, (30), 24 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:14:24,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 14:14:24,526 INFO L93 Difference]: Finished difference Result 130 states and 321 transitions. [2021-08-26 14:14:24,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-08-26 14:14:24,526 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.25) internal successors, (30), 24 states have internal predecessors, (30), 0 states have call successors, (0), 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 28 [2021-08-26 14:14:24,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 14:14:24,526 INFO L225 Difference]: With dead ends: 130 [2021-08-26 14:14:24,527 INFO L226 Difference]: Without dead ends: 118 [2021-08-26 14:14:24,527 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1146 ImplicationChecksByTransitivity, 1478.5ms TimeCoverageRelationStatistics Valid=1361, Invalid=3061, Unknown=0, NotChecked=0, Total=4422 [2021-08-26 14:14:24,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-08-26 14:14:24,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 70. [2021-08-26 14:14:24,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 2.4927536231884058) internal successors, (172), 69 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:14:24,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 172 transitions. [2021-08-26 14:14:24,529 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 172 transitions. Word has length 28 [2021-08-26 14:14:24,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 14:14:24,529 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 172 transitions. [2021-08-26 14:14:24,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 1.25) internal successors, (30), 24 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:14:24,529 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 172 transitions. [2021-08-26 14:14:24,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-26 14:14:24,529 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 14:14:24,530 INFO L512 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 14:14:24,564 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-08-26 14:14:24,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-08-26 14:14:24,737 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-26 14:14:24,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 14:14:24,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1168061287, now seen corresponding path program 27 times [2021-08-26 14:14:24,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 14:14:24,737 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033962270] [2021-08-26 14:14:24,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 14:14:24,737 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 14:14:24,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 14:14:25,018 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 14:14:25,018 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 14:14:25,018 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033962270] [2021-08-26 14:14:25,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033962270] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 14:14:25,019 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129801777] [2021-08-26 14:14:25,019 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-26 14:14:25,019 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 14:14:25,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 14:14:25,020 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 14:14:25,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-08-26 14:14:25,364 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-08-26 14:14:25,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 14:14:25,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-26 14:14:25,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 14:14:25,691 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 14:14:25,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129801777] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 14:14:25,691 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 14:14:25,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-08-26 14:14:25,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130263092] [2021-08-26 14:14:25,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-26 14:14:25,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 14:14:25,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-26 14:14:25,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=499, Unknown=0, NotChecked=0, Total=650 [2021-08-26 14:14:25,694 INFO L87 Difference]: Start difference. First operand 70 states and 172 transitions. Second operand has 26 states, 25 states have (on average 1.24) internal successors, (31), 25 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) [2021-08-26 14:14:26,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 14:14:26,724 INFO L93 Difference]: Finished difference Result 134 states and 331 transitions. [2021-08-26 14:14:26,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-08-26 14:14:26,725 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.24) internal successors, (31), 25 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 29 [2021-08-26 14:14:26,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 14:14:26,725 INFO L225 Difference]: With dead ends: 134 [2021-08-26 14:14:26,725 INFO L226 Difference]: Without dead ends: 122 [2021-08-26 14:14:26,726 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1313 ImplicationChecksByTransitivity, 1057.4ms TimeCoverageRelationStatistics Valid=1484, Invalid=3346, Unknown=0, NotChecked=0, Total=4830 [2021-08-26 14:14:26,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-08-26 14:14:26,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 74. [2021-08-26 14:14:26,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.4794520547945207) internal successors, (181), 73 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:14:26,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 181 transitions. [2021-08-26 14:14:26,728 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 181 transitions. Word has length 29 [2021-08-26 14:14:26,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 14:14:26,728 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 181 transitions. [2021-08-26 14:14:26,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.24) internal successors, (31), 25 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) [2021-08-26 14:14:26,728 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 181 transitions. [2021-08-26 14:14:26,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-26 14:14:26,728 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 14:14:26,728 INFO L512 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 14:14:26,750 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-08-26 14:14:26,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-08-26 14:14:26,945 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-26 14:14:26,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 14:14:26,945 INFO L82 PathProgramCache]: Analyzing trace with hash 283610275, now seen corresponding path program 28 times [2021-08-26 14:14:26,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 14:14:26,945 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556978897] [2021-08-26 14:14:26,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 14:14:26,945 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 14:14:26,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 14:14:27,273 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 14:14:27,274 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 14:14:27,274 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556978897] [2021-08-26 14:14:27,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556978897] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 14:14:27,274 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209892120] [2021-08-26 14:14:27,274 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-26 14:14:27,274 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 14:14:27,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 14:14:27,281 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 14:14:27,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-08-26 14:14:27,641 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-26 14:14:27,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 14:14:27,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-26 14:14:27,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 14:14:27,757 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 14:14:27,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209892120] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 14:14:27,758 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 14:14:27,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-08-26 14:14:27,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244711983] [2021-08-26 14:14:27,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-26 14:14:27,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 14:14:27,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-26 14:14:27,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=539, Unknown=0, NotChecked=0, Total=702 [2021-08-26 14:14:27,772 INFO L87 Difference]: Start difference. First operand 74 states and 181 transitions. Second operand has 27 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 26 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:14:28,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 14:14:28,969 INFO L93 Difference]: Finished difference Result 138 states and 341 transitions. [2021-08-26 14:14:28,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-08-26 14:14:28,970 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 26 states have internal predecessors, (32), 0 states have call successors, (0), 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 30 [2021-08-26 14:14:28,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 14:14:28,970 INFO L225 Difference]: With dead ends: 138 [2021-08-26 14:14:28,970 INFO L226 Difference]: Without dead ends: 126 [2021-08-26 14:14:28,971 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1382 ImplicationChecksByTransitivity, 1227.7ms TimeCoverageRelationStatistics Valid=1616, Invalid=3640, Unknown=0, NotChecked=0, Total=5256 [2021-08-26 14:14:28,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-08-26 14:14:28,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 74. [2021-08-26 14:14:28,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.493150684931507) internal successors, (182), 73 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:14:28,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 182 transitions. [2021-08-26 14:14:28,973 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 182 transitions. Word has length 30 [2021-08-26 14:14:28,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 14:14:28,973 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 182 transitions. [2021-08-26 14:14:28,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 26 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:14:28,973 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 182 transitions. [2021-08-26 14:14:28,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-26 14:14:28,975 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 14:14:28,975 INFO L512 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 14:14:29,000 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-08-26 14:14:29,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 14:14:29,189 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-26 14:14:29,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 14:14:29,189 INFO L82 PathProgramCache]: Analyzing trace with hash 1520724969, now seen corresponding path program 29 times [2021-08-26 14:14:29,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 14:14:29,189 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762265479] [2021-08-26 14:14:29,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 14:14:29,189 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 14:14:29,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 14:14:29,895 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 14:14:29,895 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 14:14:29,895 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762265479] [2021-08-26 14:14:29,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762265479] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 14:14:29,895 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65696913] [2021-08-26 14:14:29,895 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-26 14:14:29,895 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 14:14:29,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 14:14:29,896 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 14:14:29,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-08-26 14:14:30,505 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-08-26 14:14:30,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 14:14:30,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-26 14:14:30,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 14:14:30,720 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 14:14:30,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65696913] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 14:14:30,721 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 14:14:30,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 27 [2021-08-26 14:14:30,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720916259] [2021-08-26 14:14:30,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-26 14:14:30,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 14:14:30,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-26 14:14:30,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=633, Unknown=0, NotChecked=0, Total=812 [2021-08-26 14:14:30,722 INFO L87 Difference]: Start difference. First operand 74 states and 182 transitions. Second operand has 29 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:14:31,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 14:14:31,805 INFO L93 Difference]: Finished difference Result 154 states and 376 transitions. [2021-08-26 14:14:31,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-08-26 14:14:31,805 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 0 states have call successors, (0), 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 31 [2021-08-26 14:14:31,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 14:14:31,806 INFO L225 Difference]: With dead ends: 154 [2021-08-26 14:14:31,806 INFO L226 Difference]: Without dead ends: 140 [2021-08-26 14:14:31,806 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1664 ImplicationChecksByTransitivity, 1376.0ms TimeCoverageRelationStatistics Valid=1807, Invalid=4199, Unknown=0, NotChecked=0, Total=6006 [2021-08-26 14:14:31,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-08-26 14:14:31,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 105. [2021-08-26 14:14:31,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.605769230769231) internal successors, (271), 104 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:14:31,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 271 transitions. [2021-08-26 14:14:31,808 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 271 transitions. Word has length 31 [2021-08-26 14:14:31,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 14:14:31,809 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 271 transitions. [2021-08-26 14:14:31,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:14:31,809 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 271 transitions. [2021-08-26 14:14:31,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-26 14:14:31,809 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 14:14:31,809 INFO L512 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 14:14:31,837 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-08-26 14:14:32,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 14:14:32,026 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-26 14:14:32,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 14:14:32,026 INFO L82 PathProgramCache]: Analyzing trace with hash 1966827045, now seen corresponding path program 30 times [2021-08-26 14:14:32,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 14:14:32,026 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830220942] [2021-08-26 14:14:32,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 14:14:32,026 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 14:14:32,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 14:14:32,533 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 14:14:32,533 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 14:14:32,533 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830220942] [2021-08-26 14:14:32,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830220942] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 14:14:32,533 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396482580] [2021-08-26 14:14:32,533 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-26 14:14:32,534 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 14:14:32,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 14:14:32,535 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 14:14:32,536 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-08-26 14:14:32,877 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-08-26 14:14:32,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 14:14:32,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-26 14:14:32,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 14:14:33,005 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 14:14:33,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396482580] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 14:14:33,005 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 14:14:33,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-08-26 14:14:33,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335009425] [2021-08-26 14:14:33,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-26 14:14:33,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 14:14:33,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-26 14:14:33,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=623, Unknown=0, NotChecked=0, Total=812 [2021-08-26 14:14:33,007 INFO L87 Difference]: Start difference. First operand 105 states and 271 transitions. Second operand has 29 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:14:34,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 14:14:34,256 INFO L93 Difference]: Finished difference Result 148 states and 365 transitions. [2021-08-26 14:14:34,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-08-26 14:14:34,257 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 0 states have call successors, (0), 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 32 [2021-08-26 14:14:34,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 14:14:34,257 INFO L225 Difference]: With dead ends: 148 [2021-08-26 14:14:34,257 INFO L226 Difference]: Without dead ends: 134 [2021-08-26 14:14:34,258 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1640 ImplicationChecksByTransitivity, 1342.4ms TimeCoverageRelationStatistics Valid=1893, Invalid=4269, Unknown=0, NotChecked=0, Total=6162 [2021-08-26 14:14:34,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-08-26 14:14:34,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 78. [2021-08-26 14:14:34,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.4935064935064934) internal successors, (192), 77 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:14:34,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 192 transitions. [2021-08-26 14:14:34,260 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 192 transitions. Word has length 32 [2021-08-26 14:14:34,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 14:14:34,260 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 192 transitions. [2021-08-26 14:14:34,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:14:34,260 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 192 transitions. [2021-08-26 14:14:34,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-26 14:14:34,260 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 14:14:34,260 INFO L512 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 14:14:34,282 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-08-26 14:14:34,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 14:14:34,481 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-26 14:14:34,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 14:14:34,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1128106987, now seen corresponding path program 31 times [2021-08-26 14:14:34,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 14:14:34,481 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572159007] [2021-08-26 14:14:34,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 14:14:34,481 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 14:14:34,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 14:14:35,083 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 14:14:35,084 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 14:14:35,084 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572159007] [2021-08-26 14:14:35,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572159007] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 14:14:35,084 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40620259] [2021-08-26 14:14:35,084 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-26 14:14:35,084 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 14:14:35,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 14:14:35,085 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 14:14:35,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-08-26 14:14:35,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 14:14:35,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-26 14:14:35,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 14:14:35,538 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 14:14:35,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40620259] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 14:14:35,539 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 14:14:35,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-08-26 14:14:35,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636972114] [2021-08-26 14:14:35,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-26 14:14:35,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 14:14:35,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-26 14:14:35,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=667, Unknown=0, NotChecked=0, Total=870 [2021-08-26 14:14:35,540 INFO L87 Difference]: Start difference. First operand 78 states and 192 transitions. Second operand has 30 states, 29 states have (on average 1.206896551724138) internal successors, (35), 29 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:14:37,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 14:14:37,336 INFO L93 Difference]: Finished difference Result 150 states and 371 transitions. [2021-08-26 14:14:37,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-08-26 14:14:37,337 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.206896551724138) internal successors, (35), 29 states have internal predecessors, (35), 0 states have call successors, (0), 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 33 [2021-08-26 14:14:37,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 14:14:37,337 INFO L225 Difference]: With dead ends: 150 [2021-08-26 14:14:37,337 INFO L226 Difference]: Without dead ends: 138 [2021-08-26 14:14:37,338 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1845 ImplicationChecksByTransitivity, 1855.3ms TimeCoverageRelationStatistics Valid=2038, Invalid=4604, Unknown=0, NotChecked=0, Total=6642 [2021-08-26 14:14:37,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-08-26 14:14:37,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 82. [2021-08-26 14:14:37,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.4814814814814814) internal successors, (201), 81 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:14:37,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 201 transitions. [2021-08-26 14:14:37,340 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 201 transitions. Word has length 33 [2021-08-26 14:14:37,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 14:14:37,340 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 201 transitions. [2021-08-26 14:14:37,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 1.206896551724138) internal successors, (35), 29 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:14:37,340 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 201 transitions. [2021-08-26 14:14:37,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-26 14:14:37,349 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 14:14:37,349 INFO L512 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 14:14:37,396 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2021-08-26 14:14:37,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 14:14:37,571 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-26 14:14:37,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 14:14:37,572 INFO L82 PathProgramCache]: Analyzing trace with hash 335472423, now seen corresponding path program 32 times [2021-08-26 14:14:37,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 14:14:37,572 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344366121] [2021-08-26 14:14:37,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 14:14:37,572 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 14:14:37,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 14:14:38,151 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 14:14:38,152 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 14:14:38,152 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344366121] [2021-08-26 14:14:38,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344366121] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 14:14:38,152 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541567383] [2021-08-26 14:14:38,152 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 14:14:38,152 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 14:14:38,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 14:14:38,153 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 14:14:38,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-08-26 14:14:38,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 14:14:38,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 14:14:38,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-26 14:14:38,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 14:14:38,721 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 14:14:38,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541567383] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 14:14:38,721 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 14:14:38,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-08-26 14:14:38,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041767940] [2021-08-26 14:14:38,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-26 14:14:38,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 14:14:38,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-26 14:14:38,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=713, Unknown=0, NotChecked=0, Total=930 [2021-08-26 14:14:38,722 INFO L87 Difference]: Start difference. First operand 82 states and 201 transitions. Second operand has 31 states, 30 states have (on average 1.2) internal successors, (36), 30 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:14:40,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 14:14:40,081 INFO L93 Difference]: Finished difference Result 154 states and 381 transitions. [2021-08-26 14:14:40,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-08-26 14:14:40,082 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.2) internal successors, (36), 30 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-26 14:14:40,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 14:14:40,082 INFO L225 Difference]: With dead ends: 154 [2021-08-26 14:14:40,082 INFO L226 Difference]: Without dead ends: 142 [2021-08-26 14:14:40,083 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1920 ImplicationChecksByTransitivity, 1670.2ms TimeCoverageRelationStatistics Valid=2192, Invalid=4948, Unknown=0, NotChecked=0, Total=7140 [2021-08-26 14:14:40,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-08-26 14:14:40,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 82. [2021-08-26 14:14:40,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.493827160493827) internal successors, (202), 81 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:14:40,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 202 transitions. [2021-08-26 14:14:40,093 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 202 transitions. Word has length 34 [2021-08-26 14:14:40,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 14:14:40,093 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 202 transitions. [2021-08-26 14:14:40,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.2) internal successors, (36), 30 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:14:40,093 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 202 transitions. [2021-08-26 14:14:40,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-26 14:14:40,094 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 14:14:40,094 INFO L512 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 14:14:40,129 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-08-26 14:14:40,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-08-26 14:14:40,304 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-26 14:14:40,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 14:14:40,304 INFO L82 PathProgramCache]: Analyzing trace with hash 1779348333, now seen corresponding path program 33 times [2021-08-26 14:14:40,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 14:14:40,304 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427962146] [2021-08-26 14:14:40,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 14:14:40,304 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 14:14:40,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 14:14:40,823 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 14:14:40,823 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 14:14:40,823 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427962146] [2021-08-26 14:14:40,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427962146] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 14:14:40,823 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101472118] [2021-08-26 14:14:40,823 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-26 14:14:40,823 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 14:14:40,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 14:14:40,824 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 14:14:40,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-08-26 14:14:41,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-08-26 14:14:41,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 14:14:41,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-26 14:14:41,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 14:14:41,450 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 14:14:41,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101472118] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 14:14:41,450 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 14:14:41,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 31 [2021-08-26 14:14:41,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644943251] [2021-08-26 14:14:41,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-26 14:14:41,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 14:14:41,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-26 14:14:41,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=821, Unknown=0, NotChecked=0, Total=1056 [2021-08-26 14:14:41,456 INFO L87 Difference]: Start difference. First operand 82 states and 202 transitions. Second operand has 33 states, 32 states have (on average 1.1875) internal successors, (38), 32 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:14:43,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 14:14:43,169 INFO L93 Difference]: Finished difference Result 170 states and 416 transitions. [2021-08-26 14:14:43,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-08-26 14:14:43,170 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 1.1875) internal successors, (38), 32 states have internal predecessors, (38), 0 states have call successors, (0), 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 35 [2021-08-26 14:14:43,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 14:14:43,171 INFO L225 Difference]: With dead ends: 170 [2021-08-26 14:14:43,171 INFO L226 Difference]: Without dead ends: 156 [2021-08-26 14:14:43,171 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2256 ImplicationChecksByTransitivity, 1826.3ms TimeCoverageRelationStatistics Valid=2413, Invalid=5597, Unknown=0, NotChecked=0, Total=8010 [2021-08-26 14:14:43,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-08-26 14:14:43,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 117. [2021-08-26 14:14:43,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 2.6120689655172415) internal successors, (303), 116 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:14:43,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 303 transitions. [2021-08-26 14:14:43,174 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 303 transitions. Word has length 35 [2021-08-26 14:14:43,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 14:14:43,174 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 303 transitions. [2021-08-26 14:14:43,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 1.1875) internal successors, (38), 32 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:14:43,174 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 303 transitions. [2021-08-26 14:14:43,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-26 14:14:43,174 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 14:14:43,174 INFO L512 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 14:14:43,203 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-08-26 14:14:43,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 14:14:43,389 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-26 14:14:43,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 14:14:43,389 INFO L82 PathProgramCache]: Analyzing trace with hash 266743721, now seen corresponding path program 34 times [2021-08-26 14:14:43,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 14:14:43,389 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782307038] [2021-08-26 14:14:43,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 14:14:43,389 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 14:14:43,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 14:14:43,815 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 14:14:43,816 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 14:14:43,816 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782307038] [2021-08-26 14:14:43,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782307038] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 14:14:43,816 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870779651] [2021-08-26 14:14:43,816 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-26 14:14:43,816 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 14:14:43,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 14:14:43,817 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 14:14:43,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-08-26 14:14:44,208 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-26 14:14:44,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 14:14:44,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-26 14:14:44,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 14:14:44,332 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 14:14:44,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870779651] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 14:14:44,333 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 14:14:44,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-08-26 14:14:44,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352821937] [2021-08-26 14:14:44,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-26 14:14:44,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 14:14:44,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-26 14:14:44,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=809, Unknown=0, NotChecked=0, Total=1056 [2021-08-26 14:14:44,335 INFO L87 Difference]: Start difference. First operand 117 states and 303 transitions. Second operand has 33 states, 32 states have (on average 1.1875) internal successors, (38), 32 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:14:46,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 14:14:46,101 INFO L93 Difference]: Finished difference Result 164 states and 405 transitions. [2021-08-26 14:14:46,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-08-26 14:14:46,101 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 1.1875) internal successors, (38), 32 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-26 14:14:46,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 14:14:46,102 INFO L225 Difference]: With dead ends: 164 [2021-08-26 14:14:46,102 INFO L226 Difference]: Without dead ends: 150 [2021-08-26 14:14:46,102 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2222 ImplicationChecksByTransitivity, 1735.0ms TimeCoverageRelationStatistics Valid=2513, Invalid=5677, Unknown=0, NotChecked=0, Total=8190 [2021-08-26 14:14:46,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-08-26 14:14:46,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 86. [2021-08-26 14:14:46,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.4941176470588236) internal successors, (212), 85 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:14:46,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 212 transitions. [2021-08-26 14:14:46,104 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 212 transitions. Word has length 36 [2021-08-26 14:14:46,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 14:14:46,104 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 212 transitions. [2021-08-26 14:14:46,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 1.1875) internal successors, (38), 32 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:14:46,105 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 212 transitions. [2021-08-26 14:14:46,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-26 14:14:46,105 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 14:14:46,105 INFO L512 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 14:14:46,123 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-08-26 14:14:46,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 14:14:46,313 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-26 14:14:46,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 14:14:46,313 INFO L82 PathProgramCache]: Analyzing trace with hash 557056623, now seen corresponding path program 35 times [2021-08-26 14:14:46,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 14:14:46,313 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418471763] [2021-08-26 14:14:46,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 14:14:46,314 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 14:14:46,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 14:14:46,602 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 14:14:46,603 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 14:14:46,603 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418471763] [2021-08-26 14:14:46,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418471763] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 14:14:46,603 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373280554] [2021-08-26 14:14:46,603 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-26 14:14:46,603 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 14:14:46,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 14:14:46,604 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 14:14:46,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-08-26 14:14:46,939 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-08-26 14:14:46,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 14:14:46,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-26 14:14:46,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 14:14:47,063 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 14:14:47,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373280554] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 14:14:47,063 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 14:14:47,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-08-26 14:14:47,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120971859] [2021-08-26 14:14:47,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-08-26 14:14:47,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 14:14:47,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-08-26 14:14:47,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=859, Unknown=0, NotChecked=0, Total=1122 [2021-08-26 14:14:47,064 INFO L87 Difference]: Start difference. First operand 86 states and 212 transitions. Second operand has 34 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 33 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:14:48,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 14:14:48,249 INFO L93 Difference]: Finished difference Result 166 states and 411 transitions. [2021-08-26 14:14:48,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-08-26 14:14:48,249 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 33 states have internal predecessors, (39), 0 states have call successors, (0), 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 37 [2021-08-26 14:14:48,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 14:14:48,250 INFO L225 Difference]: With dead ends: 166 [2021-08-26 14:14:48,250 INFO L226 Difference]: Without dead ends: 154 [2021-08-26 14:14:48,251 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2465 ImplicationChecksByTransitivity, 1232.3ms TimeCoverageRelationStatistics Valid=2680, Invalid=6062, Unknown=0, NotChecked=0, Total=8742 [2021-08-26 14:14:48,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-08-26 14:14:48,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 90. [2021-08-26 14:14:48,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 2.4831460674157304) internal successors, (221), 89 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:14:48,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 221 transitions. [2021-08-26 14:14:48,253 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 221 transitions. Word has length 37 [2021-08-26 14:14:48,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 14:14:48,253 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 221 transitions. [2021-08-26 14:14:48,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 33 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:14:48,253 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 221 transitions. [2021-08-26 14:14:48,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-26 14:14:48,254 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 14:14:48,254 INFO L512 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 14:14:48,274 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-08-26 14:14:48,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-08-26 14:14:48,471 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-26 14:14:48,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 14:14:48,471 INFO L82 PathProgramCache]: Analyzing trace with hash -1357029461, now seen corresponding path program 36 times [2021-08-26 14:14:48,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 14:14:48,471 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032925030] [2021-08-26 14:14:48,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 14:14:48,471 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 14:14:48,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 14:14:48,778 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 14:14:48,778 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 14:14:48,778 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032925030] [2021-08-26 14:14:48,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032925030] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 14:14:48,778 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422191860] [2021-08-26 14:14:48,778 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-26 14:14:48,778 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 14:14:48,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 14:14:48,779 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 14:14:48,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-08-26 14:14:49,126 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-08-26 14:14:49,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 14:14:49,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 36 conjunts are in the unsatisfiable core [2021-08-26 14:14:49,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 14:14:49,239 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 14:14:49,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422191860] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 14:14:49,240 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 14:14:49,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-08-26 14:14:49,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880335918] [2021-08-26 14:14:49,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-08-26 14:14:49,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 14:14:49,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-08-26 14:14:49,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=911, Unknown=0, NotChecked=0, Total=1190 [2021-08-26 14:14:49,241 INFO L87 Difference]: Start difference. First operand 90 states and 221 transitions. Second operand has 35 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:14:50,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 14:14:50,524 INFO L93 Difference]: Finished difference Result 170 states and 421 transitions. [2021-08-26 14:14:50,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-08-26 14:14:50,524 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 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 38 [2021-08-26 14:14:50,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 14:14:50,525 INFO L225 Difference]: With dead ends: 170 [2021-08-26 14:14:50,525 INFO L226 Difference]: Without dead ends: 158 [2021-08-26 14:14:50,525 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2546 ImplicationChecksByTransitivity, 1337.2ms TimeCoverageRelationStatistics Valid=2856, Invalid=6456, Unknown=0, NotChecked=0, Total=9312 [2021-08-26 14:14:50,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-08-26 14:14:50,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 90. [2021-08-26 14:14:50,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 2.49438202247191) internal successors, (222), 89 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:14:50,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 222 transitions. [2021-08-26 14:14:50,534 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 222 transitions. Word has length 38 [2021-08-26 14:14:50,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 14:14:50,535 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 222 transitions. [2021-08-26 14:14:50,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:14:50,535 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 222 transitions. [2021-08-26 14:14:50,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-26 14:14:50,535 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 14:14:50,535 INFO L512 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 14:14:50,553 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-08-26 14:14:50,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-08-26 14:14:50,748 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-26 14:14:50,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 14:14:50,748 INFO L82 PathProgramCache]: Analyzing trace with hash -1539204879, now seen corresponding path program 37 times [2021-08-26 14:14:50,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 14:14:50,748 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973482357] [2021-08-26 14:14:50,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 14:14:50,748 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 14:14:50,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 14:14:51,089 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 14:14:51,090 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 14:14:51,090 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973482357] [2021-08-26 14:14:51,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973482357] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 14:14:51,090 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760870018] [2021-08-26 14:14:51,090 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-26 14:14:51,090 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 14:14:51,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 14:14:51,090 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 14:14:51,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-08-26 14:14:51,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 14:14:51,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-26 14:14:51,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 14:14:51,642 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 14:14:51,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760870018] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 14:14:51,643 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 14:14:51,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 35 [2021-08-26 14:14:51,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242795099] [2021-08-26 14:14:51,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-26 14:14:51,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 14:14:51,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-26 14:14:51,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=1033, Unknown=0, NotChecked=0, Total=1332 [2021-08-26 14:14:51,644 INFO L87 Difference]: Start difference. First operand 90 states and 222 transitions. Second operand has 37 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 36 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) [2021-08-26 14:14:53,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 14:14:53,112 INFO L93 Difference]: Finished difference Result 186 states and 456 transitions. [2021-08-26 14:14:53,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-08-26 14:14:53,112 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 36 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) Word has length 39 [2021-08-26 14:14:53,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 14:14:53,113 INFO L225 Difference]: With dead ends: 186 [2021-08-26 14:14:53,113 INFO L226 Difference]: Without dead ends: 172 [2021-08-26 14:14:53,114 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2936 ImplicationChecksByTransitivity, 1490.8ms TimeCoverageRelationStatistics Valid=3107, Invalid=7195, Unknown=0, NotChecked=0, Total=10302 [2021-08-26 14:14:53,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-08-26 14:14:53,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 129. [2021-08-26 14:14:53,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 2.6171875) internal successors, (335), 128 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:14:53,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 335 transitions. [2021-08-26 14:14:53,116 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 335 transitions. Word has length 39 [2021-08-26 14:14:53,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 14:14:53,116 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 335 transitions. [2021-08-26 14:14:53,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 36 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) [2021-08-26 14:14:53,117 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 335 transitions. [2021-08-26 14:14:53,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-08-26 14:14:53,117 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 14:14:53,117 INFO L512 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 14:14:53,137 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-08-26 14:14:53,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-08-26 14:14:53,335 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-26 14:14:53,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 14:14:53,335 INFO L82 PathProgramCache]: Analyzing trace with hash 1565038381, now seen corresponding path program 38 times [2021-08-26 14:14:53,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 14:14:53,335 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437244332] [2021-08-26 14:14:53,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 14:14:53,335 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 14:14:53,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 14:14:53,732 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 14:14:53,732 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 14:14:53,732 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437244332] [2021-08-26 14:14:53,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437244332] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 14:14:53,732 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684595273] [2021-08-26 14:14:53,733 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 14:14:53,733 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 14:14:53,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 14:14:53,734 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 14:14:53,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-08-26 14:14:54,102 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 14:14:54,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 14:14:54,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 38 conjunts are in the unsatisfiable core [2021-08-26 14:14:54,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 14:14:54,243 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 14:14:54,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684595273] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 14:14:54,243 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 14:14:54,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-08-26 14:14:54,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088427080] [2021-08-26 14:14:54,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-26 14:14:54,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 14:14:54,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-26 14:14:54,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=313, Invalid=1019, Unknown=0, NotChecked=0, Total=1332 [2021-08-26 14:14:54,244 INFO L87 Difference]: Start difference. First operand 129 states and 335 transitions. Second operand has 37 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 36 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) [2021-08-26 14:14:55,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 14:14:55,706 INFO L93 Difference]: Finished difference Result 180 states and 445 transitions. [2021-08-26 14:14:55,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-08-26 14:14:55,706 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 36 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) Word has length 40 [2021-08-26 14:14:55,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 14:14:55,707 INFO L225 Difference]: With dead ends: 180 [2021-08-26 14:14:55,707 INFO L226 Difference]: Without dead ends: 166 [2021-08-26 14:14:55,707 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2892 ImplicationChecksByTransitivity, 1536.9ms TimeCoverageRelationStatistics Valid=3221, Invalid=7285, Unknown=0, NotChecked=0, Total=10506 [2021-08-26 14:14:55,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-08-26 14:14:55,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 94. [2021-08-26 14:14:55,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.4946236559139785) internal successors, (232), 93 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:14:55,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 232 transitions. [2021-08-26 14:14:55,709 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 232 transitions. Word has length 40 [2021-08-26 14:14:55,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 14:14:55,709 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 232 transitions. [2021-08-26 14:14:55,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 36 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) [2021-08-26 14:14:55,710 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 232 transitions. [2021-08-26 14:14:55,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-26 14:14:55,710 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 14:14:55,710 INFO L512 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 14:14:55,730 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-08-26 14:14:55,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-08-26 14:14:55,928 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-26 14:14:55,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 14:14:55,928 INFO L82 PathProgramCache]: Analyzing trace with hash -1706846477, now seen corresponding path program 39 times [2021-08-26 14:14:55,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 14:14:55,928 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593311582] [2021-08-26 14:14:55,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 14:14:55,929 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 14:14:55,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 14:14:56,310 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 14:14:56,310 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 14:14:56,310 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593311582] [2021-08-26 14:14:56,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593311582] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 14:14:56,310 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318378673] [2021-08-26 14:14:56,310 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-26 14:14:56,310 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 14:14:56,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 14:14:56,311 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 14:14:56,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-08-26 14:14:56,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-08-26 14:14:56,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 14:14:56,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 39 conjunts are in the unsatisfiable core [2021-08-26 14:14:56,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 14:14:56,860 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 14:14:56,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318378673] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 14:14:56,860 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 14:14:56,860 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-08-26 14:14:56,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851786116] [2021-08-26 14:14:56,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-08-26 14:14:56,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 14:14:56,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-08-26 14:14:56,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=1075, Unknown=0, NotChecked=0, Total=1406 [2021-08-26 14:14:56,861 INFO L87 Difference]: Start difference. First operand 94 states and 232 transitions. Second operand has 38 states, 37 states have (on average 1.162162162162162) internal successors, (43), 37 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:14:58,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 14:14:58,318 INFO L93 Difference]: Finished difference Result 182 states and 451 transitions. [2021-08-26 14:14:58,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-08-26 14:14:58,318 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 1.162162162162162) internal successors, (43), 37 states have internal predecessors, (43), 0 states have call successors, (0), 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 [2021-08-26 14:14:58,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 14:14:58,319 INFO L225 Difference]: With dead ends: 182 [2021-08-26 14:14:58,319 INFO L226 Difference]: Without dead ends: 170 [2021-08-26 14:14:58,320 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3173 ImplicationChecksByTransitivity, 1561.9ms TimeCoverageRelationStatistics Valid=3410, Invalid=7720, Unknown=0, NotChecked=0, Total=11130 [2021-08-26 14:14:58,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-08-26 14:14:58,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 98. [2021-08-26 14:14:58,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.484536082474227) internal successors, (241), 97 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:14:58,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 241 transitions. [2021-08-26 14:14:58,322 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 241 transitions. Word has length 41 [2021-08-26 14:14:58,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 14:14:58,322 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 241 transitions. [2021-08-26 14:14:58,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 1.162162162162162) internal successors, (43), 37 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:14:58,322 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 241 transitions. [2021-08-26 14:14:58,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-26 14:14:58,322 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 14:14:58,322 INFO L512 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 14:14:58,340 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2021-08-26 14:14:58,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 14:14:58,523 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-26 14:14:58,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 14:14:58,523 INFO L82 PathProgramCache]: Analyzing trace with hash 763622959, now seen corresponding path program 40 times [2021-08-26 14:14:58,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 14:14:58,523 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056024960] [2021-08-26 14:14:58,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 14:14:58,523 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 14:14:58,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 14:14:58,944 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 14:14:58,944 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 14:14:58,944 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056024960] [2021-08-26 14:14:58,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056024960] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 14:14:58,944 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453094851] [2021-08-26 14:14:58,944 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-26 14:14:58,944 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 14:14:58,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 14:14:58,945 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 14:14:58,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-08-26 14:14:59,349 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-26 14:14:59,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 14:14:59,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 40 conjunts are in the unsatisfiable core [2021-08-26 14:14:59,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 14:14:59,496 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 14:14:59,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453094851] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 14:14:59,497 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 14:14:59,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-08-26 14:14:59,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470814315] [2021-08-26 14:14:59,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-08-26 14:14:59,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 14:14:59,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-08-26 14:14:59,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=349, Invalid=1133, Unknown=0, NotChecked=0, Total=1482 [2021-08-26 14:14:59,498 INFO L87 Difference]: Start difference. First operand 98 states and 241 transitions. Second operand has 39 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 38 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:15:01,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 14:15:01,063 INFO L93 Difference]: Finished difference Result 186 states and 461 transitions. [2021-08-26 14:15:01,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-08-26 14:15:01,064 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 38 states have internal predecessors, (44), 0 states have call successors, (0), 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 42 [2021-08-26 14:15:01,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 14:15:01,064 INFO L225 Difference]: With dead ends: 186 [2021-08-26 14:15:01,064 INFO L226 Difference]: Without dead ends: 174 [2021-08-26 14:15:01,065 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3260 ImplicationChecksByTransitivity, 1693.4ms TimeCoverageRelationStatistics Valid=3608, Invalid=8164, Unknown=0, NotChecked=0, Total=11772 [2021-08-26 14:15:01,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-08-26 14:15:01,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 98. [2021-08-26 14:15:01,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.4948453608247423) internal successors, (242), 97 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:15:01,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 242 transitions. [2021-08-26 14:15:01,067 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 242 transitions. Word has length 42 [2021-08-26 14:15:01,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 14:15:01,067 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 242 transitions. [2021-08-26 14:15:01,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 38 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:15:01,067 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 242 transitions. [2021-08-26 14:15:01,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-26 14:15:01,068 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 14:15:01,068 INFO L512 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 14:15:01,101 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-08-26 14:15:01,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-08-26 14:15:01,281 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-26 14:15:01,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 14:15:01,281 INFO L82 PathProgramCache]: Analyzing trace with hash 398335093, now seen corresponding path program 41 times [2021-08-26 14:15:01,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 14:15:01,281 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150656656] [2021-08-26 14:15:01,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 14:15:01,281 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 14:15:01,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 14:15:01,735 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 14:15:01,735 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 14:15:01,735 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150656656] [2021-08-26 14:15:01,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150656656] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 14:15:01,735 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120694098] [2021-08-26 14:15:01,735 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-26 14:15:01,736 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 14:15:01,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 14:15:01,736 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 14:15:01,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-08-26 14:15:02,234 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-08-26 14:15:02,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 14:15:02,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-26 14:15:02,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 14:15:02,384 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 14:15:02,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120694098] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 14:15:02,385 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 14:15:02,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-08-26 14:15:02,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532571660] [2021-08-26 14:15:02,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-08-26 14:15:02,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 14:15:02,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-08-26 14:15:02,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=368, Invalid=1192, Unknown=0, NotChecked=0, Total=1560 [2021-08-26 14:15:02,386 INFO L87 Difference]: Start difference. First operand 98 states and 242 transitions. Second operand has 40 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 39 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:15:04,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 14:15:04,134 INFO L93 Difference]: Finished difference Result 190 states and 471 transitions. [2021-08-26 14:15:04,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-08-26 14:15:04,134 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 39 states have internal predecessors, (45), 0 states have call successors, (0), 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 [2021-08-26 14:15:04,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 14:15:04,135 INFO L225 Difference]: With dead ends: 190 [2021-08-26 14:15:04,135 INFO L226 Difference]: Without dead ends: 178 [2021-08-26 14:15:04,136 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3560 ImplicationChecksByTransitivity, 1865.9ms TimeCoverageRelationStatistics Valid=3808, Invalid=8624, Unknown=0, NotChecked=0, Total=12432 [2021-08-26 14:15:04,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-08-26 14:15:04,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 102. [2021-08-26 14:15:04,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.485148514851485) internal successors, (251), 101 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:15:04,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 251 transitions. [2021-08-26 14:15:04,138 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 251 transitions. Word has length 43 [2021-08-26 14:15:04,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 14:15:04,138 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 251 transitions. [2021-08-26 14:15:04,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 39 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:15:04,138 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 251 transitions. [2021-08-26 14:15:04,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-26 14:15:04,138 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 14:15:04,139 INFO L512 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 14:15:04,157 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-08-26 14:15:04,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-08-26 14:15:04,345 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-26 14:15:04,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 14:15:04,345 INFO L82 PathProgramCache]: Analyzing trace with hash -597451599, now seen corresponding path program 42 times [2021-08-26 14:15:04,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 14:15:04,345 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216189795] [2021-08-26 14:15:04,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 14:15:04,345 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 14:15:04,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 14:15:04,924 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 14:15:04,924 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 14:15:04,924 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216189795] [2021-08-26 14:15:04,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216189795] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 14:15:04,924 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002266114] [2021-08-26 14:15:04,924 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-26 14:15:04,924 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 14:15:04,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 14:15:04,925 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 14:15:04,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-08-26 14:15:05,500 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2021-08-26 14:15:05,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 14:15:05,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 42 conjunts are in the unsatisfiable core [2021-08-26 14:15:05,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 14:15:05,710 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 14:15:05,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002266114] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 14:15:05,710 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 14:15:05,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 40 [2021-08-26 14:15:05,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977038943] [2021-08-26 14:15:05,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-08-26 14:15:05,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 14:15:05,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-08-26 14:15:05,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=390, Invalid=1332, Unknown=0, NotChecked=0, Total=1722 [2021-08-26 14:15:05,711 INFO L87 Difference]: Start difference. First operand 102 states and 251 transitions. Second operand has 42 states, 41 states have (on average 1.146341463414634) internal successors, (47), 41 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:15:07,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 14:15:07,713 INFO L93 Difference]: Finished difference Result 210 states and 515 transitions. [2021-08-26 14:15:07,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-08-26 14:15:07,714 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 1.146341463414634) internal successors, (47), 41 states have internal predecessors, (47), 0 states have call successors, (0), 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 44 [2021-08-26 14:15:07,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 14:15:07,721 INFO L225 Difference]: With dead ends: 210 [2021-08-26 14:15:07,721 INFO L226 Difference]: Without dead ends: 196 [2021-08-26 14:15:07,722 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3796 ImplicationChecksByTransitivity, 2165.6ms TimeCoverageRelationStatistics Valid=4100, Invalid=9472, Unknown=0, NotChecked=0, Total=13572 [2021-08-26 14:15:07,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-08-26 14:15:07,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 144. [2021-08-26 14:15:07,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.6223776223776225) internal successors, (375), 143 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:15:07,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 375 transitions. [2021-08-26 14:15:07,724 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 375 transitions. Word has length 44 [2021-08-26 14:15:07,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 14:15:07,725 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 375 transitions. [2021-08-26 14:15:07,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 1.146341463414634) internal successors, (47), 41 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:15:07,725 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 375 transitions. [2021-08-26 14:15:07,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-26 14:15:07,725 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 14:15:07,725 INFO L512 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 14:15:07,743 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-08-26 14:15:07,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-08-26 14:15:07,937 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-26 14:15:07,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 14:15:07,937 INFO L82 PathProgramCache]: Analyzing trace with hash 548227447, now seen corresponding path program 43 times [2021-08-26 14:15:07,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 14:15:07,937 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892201005] [2021-08-26 14:15:07,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 14:15:07,937 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 14:15:07,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 14:15:08,463 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 14:15:08,464 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 14:15:08,464 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892201005] [2021-08-26 14:15:08,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892201005] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 14:15:08,464 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413666275] [2021-08-26 14:15:08,464 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-26 14:15:08,464 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 14:15:08,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 14:15:08,465 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 14:15:08,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-08-26 14:15:08,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 14:15:08,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-26 14:15:08,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 14:15:09,068 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 14:15:09,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413666275] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 14:15:09,069 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 14:15:09,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2021-08-26 14:15:09,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295122344] [2021-08-26 14:15:09,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-08-26 14:15:09,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 14:15:09,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-08-26 14:15:09,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=407, Invalid=1315, Unknown=0, NotChecked=0, Total=1722 [2021-08-26 14:15:09,069 INFO L87 Difference]: Start difference. First operand 144 states and 375 transitions. Second operand has 42 states, 41 states have (on average 1.146341463414634) internal successors, (47), 41 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:15:11,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 14:15:11,156 INFO L93 Difference]: Finished difference Result 200 states and 495 transitions. [2021-08-26 14:15:11,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-08-26 14:15:11,156 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 1.146341463414634) internal successors, (47), 41 states have internal predecessors, (47), 0 states have call successors, (0), 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 45 [2021-08-26 14:15:11,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 14:15:11,157 INFO L225 Difference]: With dead ends: 200 [2021-08-26 14:15:11,157 INFO L226 Difference]: Without dead ends: 188 [2021-08-26 14:15:11,158 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3969 ImplicationChecksByTransitivity, 2214.9ms TimeCoverageRelationStatistics Valid=4228, Invalid=9578, Unknown=0, NotChecked=0, Total=13806 [2021-08-26 14:15:11,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-08-26 14:15:11,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 147. [2021-08-26 14:15:11,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 2.6232876712328768) internal successors, (383), 146 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:15:11,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 383 transitions. [2021-08-26 14:15:11,160 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 383 transitions. Word has length 45 [2021-08-26 14:15:11,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 14:15:11,160 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 383 transitions. [2021-08-26 14:15:11,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 1.146341463414634) internal successors, (47), 41 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:15:11,161 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 383 transitions. [2021-08-26 14:15:11,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-08-26 14:15:11,161 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 14:15:11,161 INFO L512 BasicCegarLoop]: trace histogram [20, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 14:15:11,220 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-08-26 14:15:11,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 14:15:11,365 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-26 14:15:11,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 14:15:11,365 INFO L82 PathProgramCache]: Analyzing trace with hash 1374921521, now seen corresponding path program 44 times [2021-08-26 14:15:11,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 14:15:11,365 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729893256] [2021-08-26 14:15:11,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 14:15:11,365 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 14:15:11,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 14:15:12,042 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-26 14:15:12,042 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 14:15:12,042 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729893256] [2021-08-26 14:15:12,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729893256] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 14:15:12,042 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483301704] [2021-08-26 14:15:12,042 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 14:15:12,042 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 14:15:12,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 14:15:12,043 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 14:15:12,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-08-26 14:15:12,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 14:15:12,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 14:15:12,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-26 14:15:12,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 14:15:12,960 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-26 14:15:12,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483301704] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 14:15:12,960 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 14:15:12,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 41 [2021-08-26 14:15:12,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865677862] [2021-08-26 14:15:12,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-08-26 14:15:12,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 14:15:12,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-08-26 14:15:12,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=1395, Unknown=0, NotChecked=0, Total=1806 [2021-08-26 14:15:12,961 INFO L87 Difference]: Start difference. First operand 147 states and 383 transitions. Second operand has 43 states, 42 states have (on average 1.1666666666666667) internal successors, (49), 42 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:15:16,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 14:15:16,003 INFO L93 Difference]: Finished difference Result 212 states and 522 transitions. [2021-08-26 14:15:16,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-08-26 14:15:16,004 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 1.1666666666666667) internal successors, (49), 42 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-08-26 14:15:16,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 14:15:16,005 INFO L225 Difference]: With dead ends: 212 [2021-08-26 14:15:16,005 INFO L226 Difference]: Without dead ends: 201 [2021-08-26 14:15:16,006 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3747 ImplicationChecksByTransitivity, 3009.1ms TimeCoverageRelationStatistics Valid=4185, Invalid=9387, Unknown=0, NotChecked=0, Total=13572 [2021-08-26 14:15:16,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-08-26 14:15:16,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 188. [2021-08-26 14:15:16,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 2.4973262032085564) internal successors, (467), 187 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:15:16,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 467 transitions. [2021-08-26 14:15:16,016 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 467 transitions. Word has length 46 [2021-08-26 14:15:16,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 14:15:16,017 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 467 transitions. [2021-08-26 14:15:16,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 1.1666666666666667) internal successors, (49), 42 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:15:16,017 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 467 transitions. [2021-08-26 14:15:16,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-26 14:15:16,025 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 14:15:16,025 INFO L512 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 14:15:16,057 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-08-26 14:15:16,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 14:15:16,243 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-26 14:15:16,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 14:15:16,243 INFO L82 PathProgramCache]: Analyzing trace with hash -1434108423, now seen corresponding path program 45 times [2021-08-26 14:15:16,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 14:15:16,243 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648341355] [2021-08-26 14:15:16,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 14:15:16,243 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 14:15:16,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 14:15:17,110 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 14:15:17,111 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 14:15:17,111 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648341355] [2021-08-26 14:15:17,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648341355] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 14:15:17,111 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140826804] [2021-08-26 14:15:17,111 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-26 14:15:17,111 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 14:15:17,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 14:15:17,117 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 14:15:17,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-08-26 14:15:17,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2021-08-26 14:15:17,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 14:15:17,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 45 conjunts are in the unsatisfiable core [2021-08-26 14:15:17,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 14:15:18,049 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 14:15:18,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140826804] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 14:15:18,049 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 14:15:18,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2021-08-26 14:15:18,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498197535] [2021-08-26 14:15:18,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-08-26 14:15:18,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 14:15:18,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-08-26 14:15:18,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=448, Invalid=1444, Unknown=0, NotChecked=0, Total=1892 [2021-08-26 14:15:18,050 INFO L87 Difference]: Start difference. First operand 188 states and 467 transitions. Second operand has 44 states, 43 states have (on average 1.1395348837209303) internal successors, (49), 43 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:15:21,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 14:15:21,475 INFO L93 Difference]: Finished difference Result 207 states and 513 transitions. [2021-08-26 14:15:21,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-08-26 14:15:21,475 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 1.1395348837209303) internal successors, (49), 43 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-26 14:15:21,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 14:15:21,476 INFO L225 Difference]: With dead ends: 207 [2021-08-26 14:15:21,476 INFO L226 Difference]: Without dead ends: 195 [2021-08-26 14:15:21,477 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4400 ImplicationChecksByTransitivity, 3503.4ms TimeCoverageRelationStatistics Valid=4670, Invalid=10582, Unknown=0, NotChecked=0, Total=15252 [2021-08-26 14:15:21,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-08-26 14:15:21,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 192. [2021-08-26 14:15:21,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 2.4973821989528795) internal successors, (477), 191 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:15:21,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 477 transitions. [2021-08-26 14:15:21,480 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 477 transitions. Word has length 47 [2021-08-26 14:15:21,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 14:15:21,480 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 477 transitions. [2021-08-26 14:15:21,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 1.1395348837209303) internal successors, (49), 43 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:15:21,480 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 477 transitions. [2021-08-26 14:15:21,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-26 14:15:21,480 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 14:15:21,480 INFO L512 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 14:15:21,512 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2021-08-26 14:15:21,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-08-26 14:15:21,693 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-26 14:15:21,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 14:15:21,693 INFO L82 PathProgramCache]: Analyzing trace with hash -327037149, now seen corresponding path program 46 times [2021-08-26 14:15:21,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 14:15:21,693 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889641073] [2021-08-26 14:15:21,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 14:15:21,693 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 14:15:21,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 14:15:22,665 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 14:15:22,665 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 14:15:22,665 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889641073] [2021-08-26 14:15:22,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889641073] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 14:15:22,665 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188409347] [2021-08-26 14:15:22,665 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-26 14:15:22,665 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 14:15:22,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 14:15:22,666 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 14:15:22,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-08-26 14:15:23,359 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-26 14:15:23,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 14:15:23,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 45 conjunts are in the unsatisfiable core [2021-08-26 14:15:23,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 14:15:23,561 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 14:15:23,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188409347] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 14:15:23,562 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 14:15:23,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 43 [2021-08-26 14:15:23,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939689588] [2021-08-26 14:15:23,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-08-26 14:15:23,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 14:15:23,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-08-26 14:15:23,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=452, Invalid=1528, Unknown=0, NotChecked=0, Total=1980 [2021-08-26 14:15:23,563 INFO L87 Difference]: Start difference. First operand 192 states and 477 transitions. Second operand has 45 states, 44 states have (on average 1.1363636363636365) internal successors, (50), 44 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) [2021-08-26 14:15:26,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 14:15:26,532 INFO L93 Difference]: Finished difference Result 213 states and 527 transitions. [2021-08-26 14:15:26,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-08-26 14:15:26,532 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 1.1363636363636365) internal successors, (50), 44 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) Word has length 47 [2021-08-26 14:15:26,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 14:15:26,533 INFO L225 Difference]: With dead ends: 213 [2021-08-26 14:15:26,533 INFO L226 Difference]: Without dead ends: 198 [2021-08-26 14:15:26,534 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4085 ImplicationChecksByTransitivity, 3447.0ms TimeCoverageRelationStatistics Valid=4582, Invalid=10180, Unknown=0, NotChecked=0, Total=14762 [2021-08-26 14:15:26,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-08-26 14:15:26,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 110. [2021-08-26 14:15:26,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.4862385321100917) internal successors, (271), 109 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:15:26,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 271 transitions. [2021-08-26 14:15:26,536 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 271 transitions. Word has length 47 [2021-08-26 14:15:26,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 14:15:26,536 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 271 transitions. [2021-08-26 14:15:26,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 1.1363636363636365) internal successors, (50), 44 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) [2021-08-26 14:15:26,536 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 271 transitions. [2021-08-26 14:15:26,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-26 14:15:26,536 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 14:15:26,536 INFO L512 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 14:15:26,572 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2021-08-26 14:15:26,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-08-26 14:15:26,765 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-26 14:15:26,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 14:15:26,765 INFO L82 PathProgramCache]: Analyzing trace with hash -1548206027, now seen corresponding path program 47 times [2021-08-26 14:15:26,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 14:15:26,765 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176927723] [2021-08-26 14:15:26,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 14:15:26,765 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 14:15:26,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-26 14:15:26,782 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-26 14:15:26,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-26 14:15:26,840 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-26 14:15:26,841 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-08-26 14:15:26,841 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 14:15:26,843 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATION [2021-08-26 14:15:26,843 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATION [2021-08-26 14:15:26,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2021-08-26 14:15:26,847 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-26 14:15:26,847 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-26 14:15:26,919 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 02:15:26 BasicIcfg [2021-08-26 14:15:26,924 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-26 14:15:26,924 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-26 14:15:26,924 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-26 14:15:26,924 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-26 14:15:26,925 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 02:13:45" (3/4) ... [2021-08-26 14:15:26,926 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-08-26 14:15:27,028 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-26 14:15:27,029 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-26 14:15:27,030 INFO L168 Benchmark]: Toolchain (without parser) took 102833.03 ms. Allocated memory was 60.8 MB in the beginning and 490.7 MB in the end (delta: 429.9 MB). Free memory was 40.1 MB in the beginning and 318.0 MB in the end (delta: -277.9 MB). Peak memory consumption was 151.1 MB. Max. memory is 16.1 GB. [2021-08-26 14:15:27,030 INFO L168 Benchmark]: CDTParser took 0.43 ms. Allocated memory is still 60.8 MB. Free memory is still 43.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 14:15:27,031 INFO L168 Benchmark]: CACSL2BoogieTranslator took 599.94 ms. Allocated memory was 60.8 MB in the beginning and 75.5 MB in the end (delta: 14.7 MB). Free memory was 40.0 MB in the beginning and 50.2 MB in the end (delta: -10.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-08-26 14:15:27,032 INFO L168 Benchmark]: Boogie Procedure Inliner took 65.44 ms. Allocated memory is still 75.5 MB. Free memory was 50.2 MB in the beginning and 48.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-26 14:15:27,032 INFO L168 Benchmark]: Boogie Preprocessor took 36.67 ms. Allocated memory is still 75.5 MB. Free memory was 48.2 MB in the beginning and 47.0 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-26 14:15:27,032 INFO L168 Benchmark]: RCFGBuilder took 741.59 ms. Allocated memory is still 75.5 MB. Free memory was 46.7 MB in the beginning and 47.1 MB in the end (delta: -330.0 kB). Peak memory consumption was 14.4 MB. Max. memory is 16.1 GB. [2021-08-26 14:15:27,034 INFO L168 Benchmark]: TraceAbstraction took 101274.81 ms. Allocated memory was 75.5 MB in the beginning and 490.7 MB in the end (delta: 415.2 MB). Free memory was 46.7 MB in the beginning and 332.7 MB in the end (delta: -285.9 MB). Peak memory consumption was 129.2 MB. Max. memory is 16.1 GB. [2021-08-26 14:15:27,035 INFO L168 Benchmark]: Witness Printer took 104.46 ms. Allocated memory is still 490.7 MB. Free memory was 332.7 MB in the beginning and 318.0 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-08-26 14:15:27,041 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.43 ms. Allocated memory is still 60.8 MB. Free memory is still 43.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 599.94 ms. Allocated memory was 60.8 MB in the beginning and 75.5 MB in the end (delta: 14.7 MB). Free memory was 40.0 MB in the beginning and 50.2 MB in the end (delta: -10.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 65.44 ms. Allocated memory is still 75.5 MB. Free memory was 50.2 MB in the beginning and 48.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 36.67 ms. Allocated memory is still 75.5 MB. Free memory was 48.2 MB in the beginning and 47.0 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 741.59 ms. Allocated memory is still 75.5 MB. Free memory was 46.7 MB in the beginning and 47.1 MB in the end (delta: -330.0 kB). Peak memory consumption was 14.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 101274.81 ms. Allocated memory was 75.5 MB in the beginning and 490.7 MB in the end (delta: 415.2 MB). Free memory was 46.7 MB in the beginning and 332.7 MB in the end (delta: -285.9 MB). Peak memory consumption was 129.2 MB. Max. memory is 16.1 GB. * Witness Printer took 104.46 ms. Allocated memory is still 490.7 MB. Free memory was 332.7 MB in the beginning and 318.0 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 5586.0ms, 68 PlacesBefore, 20 PlacesAfterwards, 66 TransitionsBefore, 15 TransitionsAfterwards, 1078 CoEnabledTransitionPairs, 6 FixpointIterations, 18 TrivialSequentialCompositions, 31 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 6 ConcurrentYvCompositions, 3 ChoiceCompositions, 58 TotalNumberOfCompositions, 1010 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 867, positive: 842, positive conditional: 0, positive unconditional: 842, negative: 25, negative conditional: 0, negative unconditional: 25, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 710, positive: 695, positive conditional: 0, positive unconditional: 695, negative: 15, negative conditional: 0, negative unconditional: 15, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 710, positive: 695, positive conditional: 0, positive unconditional: 695, negative: 15, negative conditional: 0, negative unconditional: 15, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 15, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 15, negative conditional: 0, negative unconditional: 15, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 44, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 44, negative conditional: 0, negative unconditional: 44, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 867, positive: 147, positive conditional: 0, positive unconditional: 147, negative: 10, negative conditional: 0, negative unconditional: 10, unknown: 710, unknown conditional: 0, unknown unconditional: 710] , Statistics on independence cache: Total cache size (in pairs): 16, Positive cache size: 13, Positive conditional cache size: 0, Positive unconditional cache size: 13, Negative cache size: 3, Negative conditional cache size: 0, Negative unconditional cache size: 3 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 722]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L694] 0 int i = 3, j = 6; [L712] 0 pthread_t id1, id2; [L713] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [arg={0:0}, i=3, j=6] [L714] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [arg={0:0}, arg={0:0}, i=3, j=6] [L704] 2 int k = 0; VAL [arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0] [L696] 1 int k = 0; VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0, k=0] [L696] COND TRUE 1 k < 20 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=1, k=0] [L704] COND TRUE 2 k < 20 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=1, k=1] [L696] COND TRUE 1 k < 20 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=1, k=2] [L704] COND TRUE 2 k < 20 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=2, k=2] [L696] COND TRUE 1 k < 20 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=3, k=2] [L704] COND TRUE 2 k < 20 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=3, k=3] [L696] COND TRUE 1 k < 20 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=3, k=4] [L704] COND TRUE 2 k < 20 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=4, k=4] [L696] COND TRUE 1 k < 20 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=4, k=5] [L704] COND TRUE 2 k < 20 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=5, k=5] [L696] COND TRUE 1 k < 20 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=16, k=5, k=6] [L704] COND TRUE 2 k < 20 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=18, k=6, k=6] [L696] COND TRUE 1 k < 20 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=18, k=7, k=6] [L704] COND TRUE 2 k < 20 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=20, k=7, k=7] [L696] COND TRUE 1 k < 20 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=20, k=7, k=8] [L704] COND TRUE 2 k < 20 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=22, k=8, k=8] [L696] COND TRUE 1 k < 20 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=22, k=8, k=9] [L704] COND TRUE 2 k < 20 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=24, k=9, k=9] [L696] COND TRUE 1 k < 20 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=24, k=10, k=9] [L704] COND TRUE 2 k < 20 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=10, k=10] [L696] COND TRUE 1 k < 20 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=27, j=26, k=11, k=10] [L704] COND TRUE 2 k < 20 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=27, j=28, k=11, k=11] [L696] COND TRUE 1 k < 20 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=29, j=28, k=12, k=11] [L704] COND TRUE 2 k < 20 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=29, j=30, k=12, k=12] [L696] COND TRUE 1 k < 20 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=31, j=30, k=12, k=13] [L704] COND TRUE 2 k < 20 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=31, j=32, k=13, k=13] [L696] COND TRUE 1 k < 20 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=33, j=32, k=14, k=13] [L704] COND TRUE 2 k < 20 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=33, j=34, k=14, k=14] [L696] COND TRUE 1 k < 20 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=35, j=34, k=15, k=14] [L704] COND TRUE 2 k < 20 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=35, j=36, k=15, k=15] [L696] COND TRUE 1 k < 20 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=37, j=36, k=15, k=16] [L704] COND TRUE 2 k < 20 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=37, j=38, k=16, k=16] [L696] COND TRUE 1 k < 20 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=39, j=38, k=17, k=16] [L704] COND TRUE 2 k < 20 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=39, j=40, k=17, k=17] [L696] COND TRUE 1 k < 20 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=41, j=40, k=17, k=18] [L704] COND TRUE 2 k < 20 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=41, j=42, k=18, k=18] [L696] COND TRUE 1 k < 20 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=43, j=42, k=18, k=19] [L704] COND TRUE 2 k < 20 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=43, j=44, k=19, k=19] [L696] COND TRUE 1 k < 20 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=45, j=44, k=20, k=19] [L704] COND TRUE 2 k < 20 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=45, j=46, k=20, k=20] [L716] 0 int condI = i >= (2*20 +6); VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=45, j=46, k=20, k=20] [L719] 0 int condJ = j >= (2*20 +6); [L721] COND TRUE 0 condI || condJ [L722] 0 reach_error() VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=45, j=46, k=20, k=20] - UnprovableResult [Line: 713]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 714]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 84 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 101029.5ms, OverallIterations: 49, TraceHistogramMax: 20, EmptinessCheckTime: 39.2ms, AutomataDifference: 49113.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 5642.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 871 SDtfs, 7781 SDslu, 3074 SDs, 0 SdLazy, 6410 SolverSat, 7254 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 7149.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4018 GetRequests, 1132 SyntacticMatches, 0 SemanticMatches, 2886 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65834 ImplicationChecksByTransitivity, 50637.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=192occurred in iteration=47, InterpolantAutomatonStates: 2045, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 189.0ms AutomataMinimizationTime, 48 MinimizatonAttempts, 1772 StatesRemovedByMinimization, 47 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 668.6ms SsaConstructionTime, 1762.8ms SatisfiabilityAnalysisTime, 21986.6ms InterpolantComputationTime, 2550 NumberOfCodeBlocks, 2550 NumberOfCodeBlocksAsserted, 306 NumberOfCheckSat, 2410 ConstructedInterpolants, 0 QuantifiedInterpolants, 8066 SizeOfPredicates, 876 NumberOfNonLiveVariables, 8546 ConjunctsInSsa, 1144 ConjunctsInUnsatCore, 92 InterpolantComputations, 4 PerfectInterpolantSequences, 12/10580 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-08-26 14:15:27,072 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 0 Received shutdown request...