./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread/triangular-1.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-1.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 9b4637dc8cec016362b73cb3abfcfe80e3e63b6e .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-20ed64e [2021-08-26 14:12:31,744 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-26 14:12:31,746 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-26 14:12:31,774 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-26 14:12:31,774 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-26 14:12:31,775 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-26 14:12:31,776 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-26 14:12:31,777 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-26 14:12:31,778 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-26 14:12:31,779 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-26 14:12:31,779 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-26 14:12:31,780 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-26 14:12:31,780 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-26 14:12:31,781 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-26 14:12:31,782 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-26 14:12:31,783 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-26 14:12:31,783 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-26 14:12:31,784 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-26 14:12:31,785 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-26 14:12:31,786 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-26 14:12:31,787 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-26 14:12:31,788 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-26 14:12:31,788 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-26 14:12:31,789 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-26 14:12:31,790 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-26 14:12:31,791 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-26 14:12:31,791 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-26 14:12:31,791 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-26 14:12:31,792 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-26 14:12:31,792 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-26 14:12:31,793 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-26 14:12:31,793 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-26 14:12:31,794 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-26 14:12:31,794 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-26 14:12:31,795 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-26 14:12:31,795 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-26 14:12:31,795 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-26 14:12:31,796 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-26 14:12:31,796 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-26 14:12:31,797 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-26 14:12:31,797 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-26 14:12:31,798 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-26 14:12:31,811 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-26 14:12:31,812 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-26 14:12:31,812 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-26 14:12:31,812 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-26 14:12:31,813 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-26 14:12:31,813 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-26 14:12:31,813 INFO L138 SettingsManager]: * Use SBE=true [2021-08-26 14:12:31,813 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-26 14:12:31,814 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-26 14:12:31,814 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-26 14:12:31,814 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-26 14:12:31,814 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-26 14:12:31,814 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-26 14:12:31,814 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-26 14:12:31,815 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-26 14:12:31,815 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-26 14:12:31,815 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-26 14:12:31,815 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-26 14:12:31,815 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-26 14:12:31,815 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-26 14:12:31,815 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-26 14:12:31,816 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-26 14:12:31,816 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 14:12:31,816 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-26 14:12:31,816 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-26 14:12:31,816 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-26 14:12:31,816 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-26 14:12:31,817 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-26 14:12:31,817 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-26 14:12:31,817 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-26 14:12:31,817 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9b4637dc8cec016362b73cb3abfcfe80e3e63b6e [2021-08-26 14:12:32,029 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-26 14:12:32,041 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-26 14:12:32,043 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-26 14:12:32,044 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-26 14:12:32,044 INFO L275 PluginConnector]: CDTParser initialized [2021-08-26 14:12:32,045 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread/triangular-1.i [2021-08-26 14:12:32,080 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/280241b11/51e652e811354de1b8670cba53a3d272/FLAG201874316 [2021-08-26 14:12:32,463 INFO L306 CDTParser]: Found 1 translation units. [2021-08-26 14:12:32,463 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/triangular-1.i [2021-08-26 14:12:32,470 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/280241b11/51e652e811354de1b8670cba53a3d272/FLAG201874316 [2021-08-26 14:12:32,480 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/280241b11/51e652e811354de1b8670cba53a3d272 [2021-08-26 14:12:32,482 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-26 14:12:32,483 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-26 14:12:32,484 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-26 14:12:32,484 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-26 14:12:32,486 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-26 14:12:32,486 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 02:12:32" (1/1) ... [2021-08-26 14:12:32,487 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ed9925c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:12:32, skipping insertion in model container [2021-08-26 14:12:32,487 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 02:12:32" (1/1) ... [2021-08-26 14:12:32,491 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-26 14:12:32,509 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-26 14:12:32,666 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-1.i[30950,30963] [2021-08-26 14:12:32,668 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 14:12:32,672 INFO L203 MainTranslator]: Completed pre-run [2021-08-26 14:12:32,714 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-1.i[30950,30963] [2021-08-26 14:12:32,721 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 14:12:32,751 INFO L208 MainTranslator]: Completed translation [2021-08-26 14:12:32,751 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:12:32 WrapperNode [2021-08-26 14:12:32,752 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-26 14:12:32,757 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-26 14:12:32,757 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-26 14:12:32,758 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-26 14:12:32,762 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:12:32" (1/1) ... [2021-08-26 14:12:32,787 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:12:32" (1/1) ... [2021-08-26 14:12:32,803 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-26 14:12:32,804 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-26 14:12:32,804 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-26 14:12:32,804 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-26 14:12:32,810 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:12:32" (1/1) ... [2021-08-26 14:12:32,810 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:12:32" (1/1) ... [2021-08-26 14:12:32,814 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:12:32" (1/1) ... [2021-08-26 14:12:32,814 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:12:32" (1/1) ... [2021-08-26 14:12:32,829 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:12:32" (1/1) ... [2021-08-26 14:12:32,831 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:12:32" (1/1) ... [2021-08-26 14:12:32,835 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:12:32" (1/1) ... [2021-08-26 14:12:32,839 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-26 14:12:32,840 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-26 14:12:32,841 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-26 14:12:32,841 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-26 14:12:32,841 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:12:32" (1/1) ... [2021-08-26 14:12:32,846 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 14:12:32,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 14:12:32,862 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 14:12:32,896 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 14:12:32,911 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-08-26 14:12:32,911 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-08-26 14:12:32,912 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-08-26 14:12:32,912 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-08-26 14:12:32,912 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-26 14:12:32,912 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-08-26 14:12:32,912 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-26 14:12:32,912 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-26 14:12:32,912 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-26 14:12:32,912 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-08-26 14:12:32,913 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-26 14:12:32,913 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-26 14:12:32,914 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 14:12:33,269 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-26 14:12:33,270 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-08-26 14:12:33,271 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 02:12:33 BoogieIcfgContainer [2021-08-26 14:12:33,271 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-26 14:12:33,273 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-26 14:12:33,273 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-26 14:12:33,275 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-26 14:12:33,276 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 02:12:32" (1/3) ... [2021-08-26 14:12:33,276 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51f8b6ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 02:12:33, skipping insertion in model container [2021-08-26 14:12:33,276 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:12:32" (2/3) ... [2021-08-26 14:12:33,277 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51f8b6ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 02:12:33, skipping insertion in model container [2021-08-26 14:12:33,277 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 02:12:33" (3/3) ... [2021-08-26 14:12:33,278 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-1.i [2021-08-26 14:12:33,282 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-26 14:12:33,282 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-26 14:12:33,283 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-26 14:12:33,283 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-26 14:12:33,310 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:12:33,310 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:12:33,310 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:12:33,310 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:12:33,311 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:12:33,311 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:12:33,311 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:12:33,311 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:12:33,312 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:12:33,312 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:12:33,312 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:12:33,313 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:12:33,313 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:12:33,313 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:12:33,313 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:12:33,313 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:12:33,313 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:12:33,314 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:12:33,314 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:12:33,314 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:12:33,315 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:12:33,315 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:12:33,315 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:12:33,315 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:12:33,315 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:12:33,316 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:12:33,316 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:12:33,316 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:12:33,317 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:12:33,317 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:12:33,317 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:12:33,317 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:12:33,318 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:12:33,318 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:12:33,318 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:12:33,318 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:12:33,318 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:12:33,319 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:12:33,319 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:12:33,319 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:12:33,319 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:12:33,319 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:12:33,319 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:12:33,320 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:12:33,320 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:12:33,320 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:12:33,320 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:12:33,320 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:12:33,320 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:12:33,321 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:12:33,321 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:12:33,321 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:12:33,321 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:12:33,321 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:12:33,323 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:12:33,323 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:12:33,326 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:12:33,326 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:12:33,326 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:12:33,327 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:12:33,327 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:12:33,327 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:12:33,332 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:12:33,332 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:12:33,332 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:12:33,332 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:12:33,332 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:12:33,333 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:12:33,335 INFO L148 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-26 14:12:33,375 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-26 14:12:33,382 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 14:12:33,383 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-08-26 14:12:33,402 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-08-26 14:12:33,411 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 68 places, 66 transitions, 142 flow [2021-08-26 14:12:33,414 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 68 places, 66 transitions, 142 flow [2021-08-26 14:12:33,415 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 68 places, 66 transitions, 142 flow [2021-08-26 14:12:33,447 INFO L129 PetriNetUnfolder]: 5/64 cut-off events. [2021-08-26 14:12:33,448 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-26 14:12:33,453 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 14:12:33,455 INFO L116 LiptonReduction]: Number of co-enabled transitions 1078 [2021-08-26 14:12:38,155 INFO L131 LiptonReduction]: Checked pairs total: 1010 [2021-08-26 14:12:38,155 INFO L133 LiptonReduction]: Total number of compositions: 58 [2021-08-26 14:12:38,160 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 40 flow [2021-08-26 14:12:38,167 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 14:12:38,180 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 14:12:38,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-08-26 14:12:38,183 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 14:12:38,184 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-08-26 14:12:38,184 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-26 14:12:38,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 14:12:38,187 INFO L82 PathProgramCache]: Analyzing trace with hash -776411381, now seen corresponding path program 1 times [2021-08-26 14:12:38,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 14:12:38,196 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216657130] [2021-08-26 14:12:38,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 14:12:38,197 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 14:12:38,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 14:12:38,830 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 14:12:38,830 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 14:12:38,830 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216657130] [2021-08-26 14:12:38,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216657130] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 14:12:38,831 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 14:12:38,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-26 14:12:38,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240151882] [2021-08-26 14:12:38,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-26 14:12:38,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 14:12:38,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-26 14:12:38,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-26 14:12:38,870 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 14:12:38,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 14:12:38,926 INFO L93 Difference]: Finished difference Result 44 states and 107 transitions. [2021-08-26 14:12:38,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-26 14:12:38,927 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 14:12:38,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 14:12:38,932 INFO L225 Difference]: With dead ends: 44 [2021-08-26 14:12:38,932 INFO L226 Difference]: Without dead ends: 38 [2021-08-26 14:12:38,933 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 220.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-26 14:12:38,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-08-26 14:12:38,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-08-26 14:12:38,952 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 14:12:38,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 92 transitions. [2021-08-26 14:12:38,953 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 92 transitions. Word has length 6 [2021-08-26 14:12:38,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 14:12:38,954 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 92 transitions. [2021-08-26 14:12:38,954 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 14:12:38,954 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 92 transitions. [2021-08-26 14:12:38,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-08-26 14:12:38,954 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 14:12:38,955 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 14:12:38,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-26 14:12:38,955 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-26 14:12:38,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 14:12:38,955 INFO L82 PathProgramCache]: Analyzing trace with hash 1192430633, now seen corresponding path program 1 times [2021-08-26 14:12:38,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 14:12:38,956 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004249314] [2021-08-26 14:12:38,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 14:12:38,956 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 14:12:38,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 14:12:39,113 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 14:12:39,113 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 14:12:39,114 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004249314] [2021-08-26 14:12:39,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004249314] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 14:12:39,115 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 14:12:39,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-26 14:12:39,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754225899] [2021-08-26 14:12:39,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-26 14:12:39,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 14:12:39,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-26 14:12:39,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-26 14:12:39,124 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 14:12:39,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 14:12:39,195 INFO L93 Difference]: Finished difference Result 64 states and 150 transitions. [2021-08-26 14:12:39,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-26 14:12:39,195 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 14:12:39,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 14:12:39,197 INFO L225 Difference]: With dead ends: 64 [2021-08-26 14:12:39,197 INFO L226 Difference]: Without dead ends: 50 [2021-08-26 14:12:39,198 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 52.6ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-26 14:12:39,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-08-26 14:12:39,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2021-08-26 14:12:39,207 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 14:12:39,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 100 transitions. [2021-08-26 14:12:39,209 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 100 transitions. Word has length 8 [2021-08-26 14:12:39,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 14:12:39,210 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 100 transitions. [2021-08-26 14:12:39,210 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 14:12:39,210 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 100 transitions. [2021-08-26 14:12:39,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-26 14:12:39,211 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 14:12:39,211 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 14:12:39,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-26 14:12:39,212 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-26 14:12:39,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 14:12:39,212 INFO L82 PathProgramCache]: Analyzing trace with hash -830913789, now seen corresponding path program 1 times [2021-08-26 14:12:39,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 14:12:39,213 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375737464] [2021-08-26 14:12:39,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 14:12:39,213 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 14:12:39,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 14:12:39,324 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 14:12:39,324 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 14:12:39,325 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375737464] [2021-08-26 14:12:39,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375737464] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 14:12:39,326 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 14:12:39,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-26 14:12:39,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798158939] [2021-08-26 14:12:39,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-26 14:12:39,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 14:12:39,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-26 14:12:39,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-26 14:12:39,330 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 14:12:39,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 14:12:39,526 INFO L93 Difference]: Finished difference Result 58 states and 136 transitions. [2021-08-26 14:12:39,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-26 14:12:39,531 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 14:12:39,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 14:12:39,533 INFO L225 Difference]: With dead ends: 58 [2021-08-26 14:12:39,533 INFO L226 Difference]: Without dead ends: 52 [2021-08-26 14:12:39,534 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 108.8ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-08-26 14:12:39,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-08-26 14:12:39,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 38. [2021-08-26 14:12:39,544 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 14:12:39,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 90 transitions. [2021-08-26 14:12:39,547 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 90 transitions. Word has length 10 [2021-08-26 14:12:39,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 14:12:39,547 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 90 transitions. [2021-08-26 14:12:39,552 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 14:12:39,552 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 90 transitions. [2021-08-26 14:12:39,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-26 14:12:39,553 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 14:12:39,553 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 14:12:39,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-26 14:12:39,553 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-26 14:12:39,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 14:12:39,554 INFO L82 PathProgramCache]: Analyzing trace with hash -855995889, now seen corresponding path program 2 times [2021-08-26 14:12:39,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 14:12:39,555 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244628568] [2021-08-26 14:12:39,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 14:12:39,556 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 14:12:39,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 14:12:40,289 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 14:12:40,289 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 14:12:40,289 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244628568] [2021-08-26 14:12:40,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244628568] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 14:12:40,289 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 14:12:40,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-26 14:12:40,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425476774] [2021-08-26 14:12:40,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-26 14:12:40,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 14:12:40,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-26 14:12:40,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-26 14:12:40,290 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 14:12:40,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 14:12:40,399 INFO L93 Difference]: Finished difference Result 60 states and 142 transitions. [2021-08-26 14:12:40,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-26 14:12:40,400 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 14:12:40,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 14:12:40,400 INFO L225 Difference]: With dead ends: 60 [2021-08-26 14:12:40,401 INFO L226 Difference]: Without dead ends: 47 [2021-08-26 14:12:40,401 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 604.8ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-08-26 14:12:40,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-08-26 14:12:40,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 40. [2021-08-26 14:12:40,405 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 14:12:40,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2021-08-26 14:12:40,406 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 10 [2021-08-26 14:12:40,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 14:12:40,406 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2021-08-26 14:12:40,406 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 14:12:40,407 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2021-08-26 14:12:40,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-26 14:12:40,407 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 14:12:40,407 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 14:12:40,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-26 14:12:40,408 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-26 14:12:40,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 14:12:40,409 INFO L82 PathProgramCache]: Analyzing trace with hash 11487317, now seen corresponding path program 3 times [2021-08-26 14:12:40,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 14:12:40,410 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180538931] [2021-08-26 14:12:40,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 14:12:40,410 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 14:12:40,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 14:12:40,494 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 14:12:40,494 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 14:12:40,494 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180538931] [2021-08-26 14:12:40,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180538931] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 14:12:40,494 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909081932] [2021-08-26 14:12:40,495 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-26 14:12:40,495 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 14:12:40,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 14:12:40,496 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 14:12:40,543 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 14:12:40,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-26 14:12:40,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 14:12:40,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-26 14:12:40,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 14:12:40,807 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 14:12:40,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909081932] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 14:12:40,808 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 14:12:40,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-08-26 14:12:40,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625078806] [2021-08-26 14:12:40,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-26 14:12:40,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 14:12:40,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-26 14:12:40,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-08-26 14:12:40,812 INFO L87 Difference]: Start difference. First operand 40 states and 97 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 14:12:41,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 14:12:41,024 INFO L93 Difference]: Finished difference Result 71 states and 167 transitions. [2021-08-26 14:12:41,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-26 14:12:41,024 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 14:12:41,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 14:12:41,038 INFO L225 Difference]: With dead ends: 71 [2021-08-26 14:12:41,038 INFO L226 Difference]: Without dead ends: 57 [2021-08-26 14:12:41,038 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 155.6ms TimeCoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2021-08-26 14:12:41,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-08-26 14:12:41,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 44. [2021-08-26 14:12:41,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 2.511627906976744) internal successors, (108), 43 states have internal predecessors, (108), 0 states have call successors, (0), 0 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 14:12:41,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 108 transitions. [2021-08-26 14:12:41,047 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 108 transitions. Word has length 11 [2021-08-26 14:12:41,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 14:12:41,047 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 108 transitions. [2021-08-26 14:12:41,048 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 14:12:41,048 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 108 transitions. [2021-08-26 14:12:41,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-26 14:12:41,048 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 14:12:41,049 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 14:12:41,077 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 14:12:41,265 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 14:12:41,266 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-26 14:12:41,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 14:12:41,266 INFO L82 PathProgramCache]: Analyzing trace with hash -766059705, now seen corresponding path program 4 times [2021-08-26 14:12:41,267 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 14:12:41,267 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596843809] [2021-08-26 14:12:41,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 14:12:41,267 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 14:12:41,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 14:12:41,330 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 14:12:41,330 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 14:12:41,330 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596843809] [2021-08-26 14:12:41,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596843809] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 14:12:41,331 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595753536] [2021-08-26 14:12:41,331 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-26 14:12:41,331 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 14:12:41,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 14:12:41,337 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 14:12:41,380 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 14:12:41,463 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-26 14:12:41,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 14:12:41,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-26 14:12:41,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 14:12:41,758 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 14:12:41,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595753536] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 14:12:41,758 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 14:12:41,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-08-26 14:12:41,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831410488] [2021-08-26 14:12:41,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-26 14:12:41,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 14:12:41,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-26 14:12:41,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-08-26 14:12:41,759 INFO L87 Difference]: Start difference. First operand 44 states and 108 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 14:12:41,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 14:12:41,872 INFO L93 Difference]: Finished difference Result 76 states and 180 transitions. [2021-08-26 14:12:41,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-26 14:12:41,872 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 14:12:41,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 14:12:41,873 INFO L225 Difference]: With dead ends: 76 [2021-08-26 14:12:41,873 INFO L226 Difference]: Without dead ends: 66 [2021-08-26 14:12:41,873 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 87.8ms TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-08-26 14:12:41,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-08-26 14:12:41,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 52. [2021-08-26 14:12:41,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 2.450980392156863) internal successors, (125), 51 states have internal predecessors, (125), 0 states have call successors, (0), 0 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 14:12:41,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 125 transitions. [2021-08-26 14:12:41,876 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 125 transitions. Word has length 11 [2021-08-26 14:12:41,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 14:12:41,876 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 125 transitions. [2021-08-26 14:12:41,876 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 14:12:41,876 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 125 transitions. [2021-08-26 14:12:41,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-26 14:12:41,876 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 14:12:41,877 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 14:12:41,903 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 14:12:42,092 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 14:12:42,093 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-26 14:12:42,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 14:12:42,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1845299755, now seen corresponding path program 5 times [2021-08-26 14:12:42,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 14:12:42,094 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562090587] [2021-08-26 14:12:42,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 14:12:42,094 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 14:12:42,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 14:12:42,467 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-26 14:12:42,468 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 14:12:42,468 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562090587] [2021-08-26 14:12:42,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562090587] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 14:12:42,468 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053619450] [2021-08-26 14:12:42,468 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-26 14:12:42,468 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 14:12:42,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 14:12:42,473 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 14:12:42,474 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 14:12:42,576 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 14:12:42,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 14:12:42,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-26 14:12:42,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 14:12:42,675 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-26 14:12:42,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053619450] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 14:12:42,675 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 14:12:42,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-08-26 14:12:42,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451814390] [2021-08-26 14:12:42,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-26 14:12:42,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 14:12:42,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-26 14:12:42,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-08-26 14:12:42,676 INFO L87 Difference]: Start difference. First operand 52 states and 125 transitions. Second operand has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 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 14:12:42,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 14:12:42,808 INFO L93 Difference]: Finished difference Result 81 states and 194 transitions. [2021-08-26 14:12:42,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-26 14:12:42,808 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 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 14:12:42,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 14:12:42,809 INFO L225 Difference]: With dead ends: 81 [2021-08-26 14:12:42,809 INFO L226 Difference]: Without dead ends: 70 [2021-08-26 14:12:42,809 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 272.4ms TimeCoverageRelationStatistics Valid=126, Invalid=254, Unknown=0, NotChecked=0, Total=380 [2021-08-26 14:12:42,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-08-26 14:12:42,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 43. [2021-08-26 14:12:42,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 2.4523809523809526) internal successors, (103), 42 states have internal predecessors, (103), 0 states have call successors, (0), 0 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 14:12:42,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 103 transitions. [2021-08-26 14:12:42,812 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 103 transitions. Word has length 13 [2021-08-26 14:12:42,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 14:12:42,812 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 103 transitions. [2021-08-26 14:12:42,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 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 14:12:42,812 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 103 transitions. [2021-08-26 14:12:42,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-26 14:12:42,813 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 14:12:42,813 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 14:12:42,835 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 14:12:43,028 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 14:12:43,029 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-26 14:12:43,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 14:12:43,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1743618811, now seen corresponding path program 6 times [2021-08-26 14:12:43,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 14:12:43,029 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758751956] [2021-08-26 14:12:43,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 14:12:43,029 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 14:12:43,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 14:12:43,220 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 14:12:43,220 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 14:12:43,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758751956] [2021-08-26 14:12:43,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758751956] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 14:12:43,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338634995] [2021-08-26 14:12:43,220 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-26 14:12:43,220 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 14:12:43,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 14:12:43,225 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 14:12:43,300 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 14:12:43,372 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-26 14:12:43,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 14:12:43,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-26 14:12:43,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 14:12:44,112 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 14:12:44,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338634995] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 14:12:44,113 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 14:12:44,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-08-26 14:12:44,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065841847] [2021-08-26 14:12:44,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-26 14:12:44,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 14:12:44,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-26 14:12:44,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-08-26 14:12:44,114 INFO L87 Difference]: Start difference. First operand 43 states and 103 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 14:12:45,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 14:12:45,153 INFO L93 Difference]: Finished difference Result 78 states and 189 transitions. [2021-08-26 14:12:45,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-26 14:12:45,153 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 14:12:45,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 14:12:45,154 INFO L225 Difference]: With dead ends: 78 [2021-08-26 14:12:45,154 INFO L226 Difference]: Without dead ends: 63 [2021-08-26 14:12:45,154 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 840.3ms TimeCoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420 [2021-08-26 14:12:45,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-08-26 14:12:45,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 56. [2021-08-26 14:12:45,156 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 14:12:45,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 137 transitions. [2021-08-26 14:12:45,157 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 137 transitions. Word has length 13 [2021-08-26 14:12:45,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 14:12:45,157 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 137 transitions. [2021-08-26 14:12:45,157 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 14:12:45,157 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 137 transitions. [2021-08-26 14:12:45,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-26 14:12:45,157 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 14:12:45,157 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 14:12:45,195 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 14:12:45,396 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 14:12:45,397 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-26 14:12:45,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 14:12:45,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1369648897, now seen corresponding path program 7 times [2021-08-26 14:12:45,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 14:12:45,397 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479426059] [2021-08-26 14:12:45,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 14:12:45,397 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 14:12:45,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 14:12:45,676 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 14:12:45,676 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 14:12:45,676 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479426059] [2021-08-26 14:12:45,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479426059] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 14:12:45,676 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875933449] [2021-08-26 14:12:45,676 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-26 14:12:45,676 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 14:12:45,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 14:12:45,680 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 14:12:45,687 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 14:12:45,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 14:12:45,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-26 14:12:45,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 14:12:45,845 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 14:12:45,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875933449] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 14:12:45,845 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 14:12:45,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-08-26 14:12:45,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942686929] [2021-08-26 14:12:45,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-26 14:12:45,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 14:12:45,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-26 14:12:45,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-08-26 14:12:45,847 INFO L87 Difference]: Start difference. First operand 56 states and 137 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 14:12:46,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 14:12:46,099 INFO L93 Difference]: Finished difference Result 93 states and 224 transitions. [2021-08-26 14:12:46,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-26 14:12:46,099 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 14:12:46,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 14:12:46,100 INFO L225 Difference]: With dead ends: 93 [2021-08-26 14:12:46,100 INFO L226 Difference]: Without dead ends: 73 [2021-08-26 14:12:46,112 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 278.1ms TimeCoverageRelationStatistics Valid=213, Invalid=437, Unknown=0, NotChecked=0, Total=650 [2021-08-26 14:12:46,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-08-26 14:12:46,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 60. [2021-08-26 14:12:46,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 2.4915254237288136) internal successors, (147), 59 states have internal predecessors, (147), 0 states have call successors, (0), 0 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 14:12:46,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 147 transitions. [2021-08-26 14:12:46,130 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 147 transitions. Word has length 14 [2021-08-26 14:12:46,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 14:12:46,130 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 147 transitions. [2021-08-26 14:12:46,130 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 14:12:46,131 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 147 transitions. [2021-08-26 14:12:46,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-26 14:12:46,131 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 14:12:46,131 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 14:12:46,153 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 14:12:46,340 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 14:12:46,341 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-26 14:12:46,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 14:12:46,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1782402707, now seen corresponding path program 8 times [2021-08-26 14:12:46,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 14:12:46,341 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411735197] [2021-08-26 14:12:46,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 14:12:46,341 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 14:12:46,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 14:12:46,566 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 14:12:46,566 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 14:12:46,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411735197] [2021-08-26 14:12:46,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411735197] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 14:12:46,567 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052180905] [2021-08-26 14:12:46,567 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 14:12:46,567 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 14:12:46,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 14:12:46,569 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 14:12:46,578 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 14:12:46,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 14:12:46,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 14:12:46,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-26 14:12:46,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 14:12:47,205 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 14:12:47,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052180905] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 14:12:47,206 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 14:12:47,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-08-26 14:12:47,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834870584] [2021-08-26 14:12:47,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-26 14:12:47,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 14:12:47,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-26 14:12:47,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-08-26 14:12:47,206 INFO L87 Difference]: Start difference. First operand 60 states and 147 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 14:12:47,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 14:12:47,420 INFO L93 Difference]: Finished difference Result 95 states and 227 transitions. [2021-08-26 14:12:47,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-26 14:12:47,421 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 14:12:47,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 14:12:47,421 INFO L225 Difference]: With dead ends: 95 [2021-08-26 14:12:47,422 INFO L226 Difference]: Without dead ends: 81 [2021-08-26 14:12:47,422 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 293.7ms TimeCoverageRelationStatistics Valid=171, Invalid=429, Unknown=0, NotChecked=0, Total=600 [2021-08-26 14:12:47,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-08-26 14:12:47,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 64. [2021-08-26 14:12:47,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 2.4603174603174605) internal successors, (155), 63 states have internal predecessors, (155), 0 states have call successors, (0), 0 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 14:12:47,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 155 transitions. [2021-08-26 14:12:47,425 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 155 transitions. Word has length 14 [2021-08-26 14:12:47,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 14:12:47,426 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 155 transitions. [2021-08-26 14:12:47,426 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 14:12:47,426 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 155 transitions. [2021-08-26 14:12:47,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-26 14:12:47,426 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 14:12:47,426 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 14:12:47,445 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-08-26 14:12:47,633 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 14:12:47,634 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-26 14:12:47,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 14:12:47,634 INFO L82 PathProgramCache]: Analyzing trace with hash -1972247363, now seen corresponding path program 9 times [2021-08-26 14:12:47,634 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 14:12:47,634 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368754141] [2021-08-26 14:12:47,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 14:12:47,635 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 14:12:47,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 14:12:47,727 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 14:12:47,727 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 14:12:47,727 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368754141] [2021-08-26 14:12:47,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368754141] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 14:12:47,727 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557319293] [2021-08-26 14:12:47,727 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-26 14:12:47,727 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 14:12:47,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 14:12:47,729 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 14:12:47,752 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 14:12:47,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-26 14:12:47,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 14:12:47,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-26 14:12:47,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 14:12:47,897 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 14:12:47,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557319293] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 14:12:47,898 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 14:12:47,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-08-26 14:12:47,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576357787] [2021-08-26 14:12:47,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-26 14:12:47,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 14:12:47,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-26 14:12:47,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-08-26 14:12:47,899 INFO L87 Difference]: Start difference. First operand 64 states and 155 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 14:12:48,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 14:12:48,190 INFO L93 Difference]: Finished difference Result 87 states and 211 transitions. [2021-08-26 14:12:48,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-26 14:12:48,190 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 14:12:48,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 14:12:48,191 INFO L225 Difference]: With dead ends: 87 [2021-08-26 14:12:48,191 INFO L226 Difference]: Without dead ends: 72 [2021-08-26 14:12:48,191 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 236.7ms TimeCoverageRelationStatistics Valid=259, Invalid=611, Unknown=0, NotChecked=0, Total=870 [2021-08-26 14:12:48,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-08-26 14:12:48,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 57. [2021-08-26 14:12:48,193 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 14:12:48,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 143 transitions. [2021-08-26 14:12:48,193 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 143 transitions. Word has length 16 [2021-08-26 14:12:48,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 14:12:48,193 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 143 transitions. [2021-08-26 14:12:48,193 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 14:12:48,193 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 143 transitions. [2021-08-26 14:12:48,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-26 14:12:48,194 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 14:12:48,194 INFO L512 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 14:12:48,212 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 14:12:48,400 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 14:12:48,401 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-26 14:12:48,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 14:12:48,401 INFO L82 PathProgramCache]: Analyzing trace with hash -802659181, now seen corresponding path program 10 times [2021-08-26 14:12:48,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 14:12:48,401 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390412924] [2021-08-26 14:12:48,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 14:12:48,401 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 14:12:48,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 14:12:48,472 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 14:12:48,472 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 14:12:48,472 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390412924] [2021-08-26 14:12:48,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390412924] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 14:12:48,474 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83049346] [2021-08-26 14:12:48,474 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-26 14:12:48,474 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 14:12:48,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 14:12:48,474 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 14:12:48,475 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 14:12:48,579 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-26 14:12:48,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 14:12:48,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-26 14:12:48,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 14:12:48,666 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 14:12:48,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83049346] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 14:12:48,667 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 14:12:48,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-26 14:12:48,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8080266] [2021-08-26 14:12:48,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-26 14:12:48,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 14:12:48,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-26 14:12:48,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-08-26 14:12:48,668 INFO L87 Difference]: Start difference. First operand 57 states and 143 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 14:12:48,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 14:12:48,859 INFO L93 Difference]: Finished difference Result 76 states and 185 transitions. [2021-08-26 14:12:48,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-26 14:12:48,860 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 14:12:48,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 14:12:48,861 INFO L225 Difference]: With dead ends: 76 [2021-08-26 14:12:48,861 INFO L226 Difference]: Without dead ends: 70 [2021-08-26 14:12:48,862 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 176.4ms TimeCoverageRelationStatistics Valid=205, Invalid=395, Unknown=0, NotChecked=0, Total=600 [2021-08-26 14:12:48,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-08-26 14:12:48,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 46. [2021-08-26 14:12:48,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 2.466666666666667) internal successors, (111), 45 states have internal predecessors, (111), 0 states have call successors, (0), 0 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 14:12:48,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 111 transitions. [2021-08-26 14:12:48,863 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 111 transitions. Word has length 16 [2021-08-26 14:12:48,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 14:12:48,864 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 111 transitions. [2021-08-26 14:12:48,864 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 14:12:48,864 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 111 transitions. [2021-08-26 14:12:48,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-26 14:12:48,864 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 14:12:48,864 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 14:12:48,881 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 14:12:49,081 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 14:12:49,081 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-26 14:12:49,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 14:12:49,082 INFO L82 PathProgramCache]: Analyzing trace with hash -802657259, now seen corresponding path program 11 times [2021-08-26 14:12:49,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 14:12:49,082 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280416944] [2021-08-26 14:12:49,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 14:12:49,082 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 14:12:49,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 14:12:49,218 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 14:12:49,219 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 14:12:49,219 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280416944] [2021-08-26 14:12:49,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280416944] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 14:12:49,219 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370777037] [2021-08-26 14:12:49,219 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-26 14:12:49,219 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 14:12:49,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 14:12:49,220 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 14:12:49,221 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 14:12:49,358 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-26 14:12:49,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 14:12:49,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-26 14:12:49,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 14:12:49,443 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 14:12:49,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370777037] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 14:12:49,443 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 14:12:49,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-08-26 14:12:49,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259953635] [2021-08-26 14:12:49,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-26 14:12:49,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 14:12:49,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-26 14:12:49,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-08-26 14:12:49,446 INFO L87 Difference]: Start difference. First operand 46 states and 111 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 14:12:49,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 14:12:49,795 INFO L93 Difference]: Finished difference Result 82 states and 201 transitions. [2021-08-26 14:12:49,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-26 14:12:49,795 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 14:12:49,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 14:12:49,796 INFO L225 Difference]: With dead ends: 82 [2021-08-26 14:12:49,796 INFO L226 Difference]: Without dead ends: 70 [2021-08-26 14:12:49,796 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 295.5ms TimeCoverageRelationStatistics Valid=293, Invalid=637, Unknown=0, NotChecked=0, Total=930 [2021-08-26 14:12:49,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-08-26 14:12:49,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 46. [2021-08-26 14:12:49,799 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 14:12:49,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 112 transitions. [2021-08-26 14:12:49,799 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 112 transitions. Word has length 16 [2021-08-26 14:12:49,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 14:12:49,800 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 112 transitions. [2021-08-26 14:12:49,800 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 14:12:49,800 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 112 transitions. [2021-08-26 14:12:49,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-26 14:12:49,802 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 14:12:49,802 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 14:12:49,821 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 14:12:50,021 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 14:12:50,021 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-26 14:12:50,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 14:12:50,022 INFO L82 PathProgramCache]: Analyzing trace with hash -1010115109, now seen corresponding path program 12 times [2021-08-26 14:12:50,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 14:12:50,022 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239968783] [2021-08-26 14:12:50,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 14:12:50,022 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 14:12:50,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 14:12:50,126 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 14:12:50,126 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 14:12:50,126 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239968783] [2021-08-26 14:12:50,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239968783] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 14:12:50,127 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128654235] [2021-08-26 14:12:50,127 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-26 14:12:50,127 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 14:12:50,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 14:12:50,128 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 14:12:50,156 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 14:12:50,255 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-26 14:12:50,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 14:12:50,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-26 14:12:50,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 14:12:50,335 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 14:12:50,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128654235] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 14:12:50,336 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 14:12:50,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-08-26 14:12:50,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213892595] [2021-08-26 14:12:50,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-26 14:12:50,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 14:12:50,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-26 14:12:50,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-08-26 14:12:50,337 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 14:12:50,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 14:12:50,671 INFO L93 Difference]: Finished difference Result 98 states and 236 transitions. [2021-08-26 14:12:50,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-26 14:12:50,671 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 14:12:50,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 14:12:50,672 INFO L225 Difference]: With dead ends: 98 [2021-08-26 14:12:50,672 INFO L226 Difference]: Without dead ends: 84 [2021-08-26 14:12:50,672 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 306.7ms TimeCoverageRelationStatistics Valid=379, Invalid=881, Unknown=0, NotChecked=0, Total=1260 [2021-08-26 14:12:50,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-08-26 14:12:50,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 63. [2021-08-26 14:12:50,674 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 14:12:50,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 159 transitions. [2021-08-26 14:12:50,674 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 159 transitions. Word has length 17 [2021-08-26 14:12:50,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 14:12:50,674 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 159 transitions. [2021-08-26 14:12:50,675 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 14:12:50,675 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 159 transitions. [2021-08-26 14:12:50,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-26 14:12:50,675 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 14:12:50,675 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 14:12:50,692 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 14:12:50,880 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 14:12:50,881 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-26 14:12:50,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 14:12:50,881 INFO L82 PathProgramCache]: Analyzing trace with hash 1740779799, now seen corresponding path program 13 times [2021-08-26 14:12:50,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 14:12:50,882 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332652820] [2021-08-26 14:12:50,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 14:12:50,882 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 14:12:50,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 14:12:50,968 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 14:12:50,968 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 14:12:50,968 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332652820] [2021-08-26 14:12:50,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332652820] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 14:12:50,968 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118463292] [2021-08-26 14:12:50,968 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-26 14:12:50,969 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 14:12:50,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 14:12:50,972 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 14:12:50,973 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 14:12:51,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 14:12:51,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-26 14:12:51,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 14:12:51,253 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 14:12:51,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118463292] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 14:12:51,254 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 14:12:51,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-08-26 14:12:51,254 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162736641] [2021-08-26 14:12:51,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-26 14:12:51,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 14:12:51,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-26 14:12:51,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-08-26 14:12:51,273 INFO L87 Difference]: Start difference. First operand 63 states and 159 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 14:12:52,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 14:12:52,434 INFO L93 Difference]: Finished difference Result 90 states and 217 transitions. [2021-08-26 14:12:52,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-26 14:12:52,440 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 18 [2021-08-26 14:12:52,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 14:12:52,441 INFO L225 Difference]: With dead ends: 90 [2021-08-26 14:12:52,441 INFO L226 Difference]: Without dead ends: 81 [2021-08-26 14:12:52,441 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 722.1ms TimeCoverageRelationStatistics Valid=401, Invalid=859, Unknown=0, NotChecked=0, Total=1260 [2021-08-26 14:12:52,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-08-26 14:12:52,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 65. [2021-08-26 14:12:52,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 2.5625) internal successors, (164), 64 states have internal predecessors, (164), 0 states have call successors, (0), 0 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 14:12:52,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 164 transitions. [2021-08-26 14:12:52,443 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 164 transitions. Word has length 18 [2021-08-26 14:12:52,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 14:12:52,443 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 164 transitions. [2021-08-26 14:12:52,443 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 14:12:52,443 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 164 transitions. [2021-08-26 14:12:52,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-26 14:12:52,443 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 14:12:52,443 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 14:12:52,477 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 14:12:52,656 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 14:12:52,656 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-26 14:12:52,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 14:12:52,657 INFO L82 PathProgramCache]: Analyzing trace with hash -57720357, now seen corresponding path program 14 times [2021-08-26 14:12:52,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 14:12:52,657 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323933671] [2021-08-26 14:12:52,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 14:12:52,657 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 14:12:52,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 14:12:52,751 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 14:12:52,751 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 14:12:52,751 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323933671] [2021-08-26 14:12:52,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323933671] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 14:12:52,752 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376529776] [2021-08-26 14:12:52,752 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 14:12:52,752 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 14:12:52,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 14:12:52,765 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 14:12:52,812 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 14:12:52,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 14:12:52,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 14:12:52,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-26 14:12:52,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 14:12:53,110 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 14:12:53,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376529776] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 14:12:53,110 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-26 14:12:53,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 9 [2021-08-26 14:12:53,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167977941] [2021-08-26 14:12:53,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-26 14:12:53,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 14:12:53,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-26 14:12:53,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-08-26 14:12:53,112 INFO L87 Difference]: Start difference. First operand 65 states and 164 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 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 14:12:53,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 14:12:53,133 INFO L93 Difference]: Finished difference Result 153 states and 342 transitions. [2021-08-26 14:12:53,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-26 14:12:53,133 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 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 14:12:53,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 14:12:53,134 INFO L225 Difference]: With dead ends: 153 [2021-08-26 14:12:53,134 INFO L226 Difference]: Without dead ends: 50 [2021-08-26 14:12:53,134 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 37.9ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-08-26 14:12:53,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-08-26 14:12:53,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-08-26 14:12:53,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 2.0408163265306123) internal successors, (100), 49 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 14:12:53,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 100 transitions. [2021-08-26 14:12:53,136 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 100 transitions. Word has length 19 [2021-08-26 14:12:53,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 14:12:53,136 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 100 transitions. [2021-08-26 14:12:53,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 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 14:12:53,136 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 100 transitions. [2021-08-26 14:12:53,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-26 14:12:53,137 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 14:12:53,137 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 14:12:53,176 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 14:12:53,356 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 14:12:53,357 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-26 14:12:53,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 14:12:53,357 INFO L82 PathProgramCache]: Analyzing trace with hash -57718435, now seen corresponding path program 15 times [2021-08-26 14:12:53,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 14:12:53,357 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221957534] [2021-08-26 14:12:53,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 14:12:53,357 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 14:12:53,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 14:12:53,467 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 14:12:53,468 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 14:12:53,468 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221957534] [2021-08-26 14:12:53,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221957534] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 14:12:53,468 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140487342] [2021-08-26 14:12:53,468 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-26 14:12:53,468 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 14:12:53,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 14:12:53,469 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 14:12:53,470 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 14:12:53,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-26 14:12:53,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 14:12:53,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-26 14:12:53,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 14:12:53,699 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 14:12:53,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140487342] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 14:12:53,699 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-26 14:12:53,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 9 [2021-08-26 14:12:53,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081489218] [2021-08-26 14:12:53,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-26 14:12:53,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 14:12:53,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-26 14:12:53,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-08-26 14:12:53,700 INFO L87 Difference]: Start difference. First operand 50 states and 100 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 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 14:12:53,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 14:12:53,708 INFO L93 Difference]: Finished difference Result 86 states and 150 transitions. [2021-08-26 14:12:53,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-26 14:12:53,708 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 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 14:12:53,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 14:12:53,709 INFO L225 Difference]: With dead ends: 86 [2021-08-26 14:12:53,709 INFO L226 Difference]: Without dead ends: 0 [2021-08-26 14:12:53,709 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 43.9ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-08-26 14:12:53,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-26 14:12:53,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-26 14:12:53,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:12:53,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-26 14:12:53,709 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 19 [2021-08-26 14:12:53,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 14:12:53,709 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-26 14:12:53,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 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 14:12:53,710 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-26 14:12:53,710 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-26 14:12:53,712 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 14:12:53,712 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION [2021-08-26 14:12:53,712 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION [2021-08-26 14:12:53,735 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-08-26 14:12:53,928 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 14:12:53,931 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-26 14:12:53,932 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-26 14:12:53,933 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 02:12:53 BasicIcfg [2021-08-26 14:12:53,933 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-26 14:12:53,933 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-26 14:12:53,933 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-26 14:12:53,933 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-26 14:12:53,934 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 02:12:33" (3/4) ... [2021-08-26 14:12:53,935 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-08-26 14:12:53,946 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure t1 [2021-08-26 14:12:53,946 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure t2 [2021-08-26 14:12:53,948 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2021-08-26 14:12:53,948 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-08-26 14:12:53,948 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-08-26 14:12:53,948 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-26 14:12:53,973 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-26 14:12:53,974 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-26 14:12:53,980 INFO L168 Benchmark]: Toolchain (without parser) took 21491.23 ms. Allocated memory was 58.7 MB in the beginning and 153.1 MB in the end (delta: 94.4 MB). Free memory was 36.5 MB in the beginning and 59.2 MB in the end (delta: -22.6 MB). Peak memory consumption was 71.3 MB. Max. memory is 16.1 GB. [2021-08-26 14:12:53,981 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 58.7 MB. Free memory was 41.0 MB in the beginning and 41.0 MB in the end (delta: 73.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 14:12:53,981 INFO L168 Benchmark]: CACSL2BoogieTranslator took 272.85 ms. Allocated memory is still 58.7 MB. Free memory was 36.4 MB in the beginning and 34.6 MB in the end (delta: 1.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-08-26 14:12:53,981 INFO L168 Benchmark]: Boogie Procedure Inliner took 46.39 ms. Allocated memory is still 58.7 MB. Free memory was 34.6 MB in the beginning and 32.8 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-26 14:12:53,981 INFO L168 Benchmark]: Boogie Preprocessor took 35.53 ms. Allocated memory is still 58.7 MB. Free memory was 32.8 MB in the beginning and 31.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-26 14:12:53,982 INFO L168 Benchmark]: RCFGBuilder took 431.29 ms. Allocated memory was 58.7 MB in the beginning and 79.7 MB in the end (delta: 21.0 MB). Free memory was 31.4 MB in the beginning and 47.3 MB in the end (delta: -15.9 MB). Peak memory consumption was 7.3 MB. Max. memory is 16.1 GB. [2021-08-26 14:12:53,982 INFO L168 Benchmark]: TraceAbstraction took 20659.76 ms. Allocated memory was 79.7 MB in the beginning and 153.1 MB in the end (delta: 73.4 MB). Free memory was 46.9 MB in the beginning and 61.3 MB in the end (delta: -14.3 MB). Peak memory consumption was 62.2 MB. Max. memory is 16.1 GB. [2021-08-26 14:12:53,982 INFO L168 Benchmark]: Witness Printer took 40.36 ms. Allocated memory is still 153.1 MB. Free memory was 61.3 MB in the beginning and 59.2 MB in the end (delta: 2.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 14:12:53,983 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 58.7 MB. Free memory was 41.0 MB in the beginning and 41.0 MB in the end (delta: 73.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 272.85 ms. Allocated memory is still 58.7 MB. Free memory was 36.4 MB in the beginning and 34.6 MB in the end (delta: 1.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 46.39 ms. Allocated memory is still 58.7 MB. Free memory was 34.6 MB in the beginning and 32.8 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 35.53 ms. Allocated memory is still 58.7 MB. Free memory was 32.8 MB in the beginning and 31.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 431.29 ms. Allocated memory was 58.7 MB in the beginning and 79.7 MB in the end (delta: 21.0 MB). Free memory was 31.4 MB in the beginning and 47.3 MB in the end (delta: -15.9 MB). Peak memory consumption was 7.3 MB. Max. memory is 16.1 GB. * TraceAbstraction took 20659.76 ms. Allocated memory was 79.7 MB in the beginning and 153.1 MB in the end (delta: 73.4 MB). Free memory was 46.9 MB in the beginning and 61.3 MB in the end (delta: -14.3 MB). Peak memory consumption was 62.2 MB. Max. memory is 16.1 GB. * Witness Printer took 40.36 ms. Allocated memory is still 153.1 MB. Free memory was 61.3 MB in the beginning and 59.2 MB in the end (delta: 2.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 4741.4ms, 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: 47, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 47, negative conditional: 0, negative unconditional: 47, 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 - PositiveResult [Line: 722]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 84 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 20556.8ms, OverallIterations: 17, TraceHistogramMax: 6, EmptinessCheckTime: 13.6ms, AutomataDifference: 4875.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 4795.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 314 SDtfs, 931 SDslu, 804 SDs, 0 SdLazy, 934 SolverSat, 486 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1470.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 470 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 301 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1480 ImplicationChecksByTransitivity, 4734.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=65occurred in iteration=15, InterpolantAutomatonStates: 241, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 88.0ms AutomataMinimizationTime, 17 MinimizatonAttempts, 220 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 192.2ms SsaConstructionTime, 718.7ms SatisfiabilityAnalysisTime, 5448.8ms InterpolantComputationTime, 428 NumberOfCodeBlocks, 428 NumberOfCodeBlocksAsserted, 53 NumberOfCheckSat, 398 ConstructedInterpolants, 0 QuantifiedInterpolants, 1380 SizeOfPredicates, 69 NumberOfNonLiveVariables, 1687 ConjunctsInSsa, 153 ConjunctsInUnsatCore, 30 InterpolantComputations, 6 PerfectInterpolantSequences, 94/290 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-08-26 14:12:54,040 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...